CEBC · California Existing Building Code

When must automatic sprinkler systems be installed/maintained during construction or alteration?

Q: Where in the CEBC is the “no‑occupancy until sprinklers tested and approved” rule?

That rule is in CEBC § 1510.1 : you may not occupy any portion of a building required to be sprinklered until the sprinkler system installation has been tested and approved.

Q: Who may operate sprinkler control valves during construction?

Only properly authorized personnel may operate sprinkler control valves; when valves are turned off/ on to facilitate staged connections they must be checked at the end of each work period to ensure the protection is in service (CEBC § 1510.2 ).

Q: I requested a citation to § 3303.7 — do you have that text?

I could not find a section labeled 3303.7 in the uploaded files. The CEBC/CFC excerpts I have do show Chapter 33 topics and specific sections (for example 3306.5 ) but not § 3303.7 . If you can provide the file or confirm the exact edition/section text, I will cite it directly.

If a building is required to have automatic sprinklers, the California Existing Building Code (CEBC) says you cannot occupy any portion of that building until the sprinkler system serving it has been installed, tested and approved (CEBC § 1510.1). The timing and on‑site maintenance of sprinklers during construction, alteration or demolition are controlled by the California Fire Code Chapter 33 (the building and fire codes cross‑reference one another), and sprinkler valves may be operated only by authorized personnel and must be checked at the end of each work period. If you need a precise citation for **§ 3303.7**, please provide that file or confirm the edition so I can cite it directly.

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Last reviewed: July 6, 2026

What the code requires — plain English

The California Existing Building Code (CEBC) says you may not occupy any part of a building that is required to have an automatic sprinkler system until that sprinkler system has been installed, tested and approved — see § 1510.1.
The CEBC and California Building/Fire Codes also tie the rules for sprinkler protection during construction, alteration or demolition to Chapter 33 of the California Fire Code (CFC). In short: where sprinklers are required, they must be provided and kept in service during construction/alteration as required by Chapter 33 (see CFC cross‑references).

The single most important rule: do not occupy any portion of a building required to be sprinklered until the sprinkler system has been installed, tested and approved (CEBC § 1510.1).

Requirements in detail

Core CEBC rule (before occupancy)

What: You cannot occupy any portion of a building where an automatic sprinkler system is required until that system has been tested and approved.
Code: § 1510.1 (CEBC).

Construction / alteration / demolition — coordination with Fire Code Chapter 33

The building code (and CEBC) point to the California Fire Code Chapter 33 for the timing, provision and maintenance of fire protection during construction, including sprinklers. For example, the model/California Building Code: 903.2.12 requires that automatic sprinkler protection “during construction, alteration and demolition operations shall be provided in accordance with Chapter 33 of the California Fire Code.”
Chapter 33 of the California Fire Code specifically repeats the occupancy‑prohibition language and sets site responsibilities for maintaining fire protection systems during construction (see CFC 3306.5). In short: it is unlawful to occupy until the sprinkler installation is tested and approved, and sprinkler valves/systems shall be operated only by authorized personnel.

Operation, control and maintenance during work

Control valves: Valves controlling sprinkler water must be operated only by authorized personnel and, when valves are turned off and on during staged construction, they must be checked at the end of each work period to ensure protection is in service (CEBC § 1510.2 and CFC guidance in Chapter 33).

Decision table — when a sprinkler system must be installed or kept in service

Situation / trigger	Requirement (what the owner/contractor must do)	Code Reference
Occupying any portion of a building that is required to have sprinklers	Do not occupy until the sprinkler system is installed, tested and approved	CEBC § 1510.1
Construction/alteration/demolition where sprinklers are required	Provide and maintain automatic sprinkler protection per Chapter 33 (CFC) during the operations	CBC 903.2.12 → CFC Chapter 33
Turning sprinkler control valves for staged connections	Only authorized personnel may operate valves; check valves at end of each work period to ensure service	CEBC § 1510.2 and CFC Chapter 33 operational rules
Temporary impairment or out‑of‑service conditions during construction	Follow fire code impairment procedures (notification, fire watch, fire department coordination) per Chapter 33 and Section 901	CFC Chapter 33 and Section 901 (see Chapter 33 cross‑references)

Exceptions & special cases

The CEBC text we retrieved does not list ad‑hoc exceptions to § 1510.1 — the occupancy prohibition stands unless another code provision (e.g., a specific local approval or Section 110.3/105.3.4 exceptions referenced in the codes) applies. See CEBC § 1510.1.
The building and fire codes cross‑reference each other: the Building Code (903.2.12) directs that construction sprinkler requirements be handled in the CFC Chapter 33, so any limited or temporary measures (temporary standpipes, temporary water supplies, approved impairment processes, or approved temporary separation of construction areas) are governed by Chapter 33 of the Fire Code. Consult the local fire code official for any site‑specific approvals.
Note: Residential Code sections (R309 series) contain specific installation exceptions for small residential additions or accessory units. Those residential exceptions apply where that Code governs, but they do not alter the CEBC/Chapter 33 requirement that required sprinkler systems be tested and approved before occupancy.

Important: I was asked to ground requirements in CEBC § 1510 and § 3303.7. I could locate and cite § 1510 in the CEBC (above). I could not find a section labeled 3303.7 among the uploaded files; the CEBC and California Fire Code Chapter 33 materials returned show Chapter 33 generally and several sections (for example 3306.5) but not a specific § 3303.7 in the files provided. If you rely on § 3303.7 specifically, please upload the file or confirm the exact code edition so I can cite it directly.

Common mistakes

Turning off water to sprinkler systems for convenience and leaving them off overnight — sprinkler control valves may only be operated by authorized personnel and must be returned to service and verified at the end of the work period. Cite: § 1510.2 and CFC Chapter 33 operational language.
Assuming partial occupancy is allowed before final approval of the sprinkler system — CEBC § 1510.1 prohibits occupancy of portions of sprinkler‑required buildings until testing/approval.
Treating temporary sprinklers or standpipes as optional without fire‑official approval — Chapter 33 sets the timing for standpipes/supplies and requires approved temporary measures; get the fire official’s approval.
Confusing residential code exceptions (small ADU/addition rules) with the CEBC occupancy/test requirement; small residential exceptions may affect whether a sprinkler is required at all, but where sprinklers are required, CEBC rules apply.

Worked example — concrete scenario

Scenario: An owner renovates a three‑story office building (existing building type that the local enforcement requires to be sprinklered). The contractor finishes sprinkler piping on the second floor and wants to allow tenant fit‑out work and partial occupancy of the second floor while the third floor is still being completed.

Step‑by‑step applying the rules:

Check code requirement: the building is a type that requires an automatic sprinkler system; CEBC § 1510.1 says you may not occupy any required sprinklered portion until the sprinkler system has been tested and approved. That means before permitting occupancy of the second floor, the sprinkler system protecting that portion must be tested and approved.
If the overall system will be connected in stages, coordinate with the fire code official and use the authorized personnel rule: any control valves that are closed/opened to connect new segments must be operated only by authorized personnel and verified at end of each work period (CEBC § 1510.2).
If a temporary impairment is needed (e.g., a portion of system out of service during tie‑in), follow CFC Chapter 33 impairment procedures (notification, fire watch if required, restore service promptly). Chapter 33 makes clear site responsibilities during construction.
Final outcome: the owner may permit occupancy of the second floor only after the sprinkler coverage serving that floor (or the building portion being occupied) is installed, tested and approved by the authority having jurisdiction.

Numerical/note: If the building has a single system with a riser serving all floors, the authority having jurisdiction may require the system to be tested and the riser put in service for the floor(s) to be occupied — coordinate staging and verification with the AHJ. (The CEBC requires approval before occupancy; detailed staging practices are handled in Chapter 33/CFC and by the AHJ.)

Related provisions (CEBC / CBC / CFC)

CEBC § 1510.1 — Automatic Sprinkler System (completion before occupancy).
CEBC § 1510.2 — Operation of sprinkler control valves (authorized personnel; end‑of‑work‑period checks).
CBC 903.2.12 — During construction: delegates sprinkler requirements during construction/alteration/demolition to CFC Chapter 33.
CFC Chapter 33 (e.g., 3306.5 and related sections) — Fire safety during construction/demolition; prohibits occupancy before sprinkler installation is tested/approved and sets site responsibilities.
CBC/CEC/Residential Code R309 series — Residential automatic sprinkler requirements and limited exceptions for additions/alterations (where applicable).

Code references

Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:

CEBC § 903.2.11.6 High relevance — show source text

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FIRE PROTECTION AND LIFE SAFETY SYSTEMS

[F] TABLE 903.2.11.6—ADDITIONAL REQUIRED PROTECTION SYSTEMS—continued	Col2
SECTION	SUBJECT
440	Horse racing stables
441	Pet kennels
449	Public libraries
453	Buildings containing_Group L occupancies_
507	Unlimited area buildings
508.5.7	Live/work units
509.4	Incidental uses
1030.6.2.3	Smoke-protected assembly seating
CFC	Automatic sprinkler system requirements as set forth in Section 903.2.11.6 of the_California Fire Code_
California Fire Code Section 1207	Stationary and mobile energy storage systems

[F] 903.2.12 During construction. Automatic sprinkler systems required during construction, alteration and demolition operations shall be provided in accordance with Chapter 33 of the California Fire Code .

903.2.13 Reserved.

903.2.14 Motion picture and television production studio sound stages, approved production facilities and production locations. 903.2.14.1 Existing sound stages and approved production facilities. All existing sound stages and approved production facili- ties equipped with an automatic fire sprinkler system shall be maintained in accordance with the provisions of California Fire Code Chapter 9. 903.2.14.2 New sound stages. All new sound stages shall be equipped with an approved automatic fire sprinkler system. The system shall be installed in accordance with the provisions of the California Fire Code Chapter 9 and shall meet the minimum design requirements of an Extra Hazard, Group 2 system. 903.2.15 Automatic sprinkler system—existing high-rise buildings. See California Fire Code Chapter 11 and California Existing Building Code. 903.2.15.1 Existing Group R-1 and R-2 high-rise buildings fire-extinguishing systems. See California Fire Code Chapter 11 and California Existing Building Code. 903.2.16 Group L occupancies. An automatic sprinkler system shall be installed throughout buildings housing Group L occupancies. Sprinkler systems for Group L occupancy shall be designed for the square footage area of the Group L occupancy based on an area of sprinkler operation of 2,500 square feet (232 m [2] ) and design density of 0.20 gpm/sf. In mixed occupancies, portions of floors with Group L occupancies, but not classified as Group L, shall be provided with a sprinkler protection system per NFPA 13. 903.2.16.1 Group L occupancies located on the 11th story and above. The automatic sprinkler system shall be designed and zoned to provide separate indication upon water-flow for each side of the 2-hour fire-smoke barrier on the 11th story and above. 903.2.17 Fixed guideway and passenger rail transit systems. _**903.2.17.1 Automatic sprinkler system.

CEBC § 3.7.5.1 High relevance — show source text
3.7.5.1|Flammable and combustible liquid storage rooms| |5704.3.8.4|Flammable and combustible liquid storage warehouses| |5705.3.7.3|Flammable and combustible liquid Group H-2 or H-3 areas| |6004.1.2|Gas cabinets for highly toxic and toxic gas| |6004.1.3|Exhausted enclosures for highly toxic and toxic gas| |6004.2.2.6|Gas rooms for highly toxic and toxic gas| |6004.3.3|Outdoor storage for highly toxic and toxic gas| |6504.1.1|Pyroxylin plastic storage cabinets| |6504.1.3|Pyroxylin plastic storage vaults| |6504.2|Pyroxylin plastic storage and manufacturing| |California Building Code Section 440|Horse racing stables| |California Building Code Section 441|Pet kennels| |California Building Code Section 449|Public libraries| |For SI: 1 cubic foot = 0.023 m3.|For SI: 1 cubic foot = 0.023 m3.|

903.2.12 During construction. Automatic sprinkler systems required during construction, alteration and demolition operations shall be provided in accordance with Section 3307.

903.2.13 Reserved.

903.2.14 Motion picture and television production studio sound stages, approved production facilities and production locations.

903.2.14.1 Existing Sound Stages and Approved Production Facilities. All existing sound stages and approved production facil- ities equipped with an automatic fire sprinkler system shall be maintained in accordance with the provisions in this chapter.

903.2.14.2 New sound stages. All new sound stages shall be equipped with an approved automatic fire sprinkler system. The system shall be installed in accordance with the provisions of the California Fire Code, Chapter 9, and shall meet the minimum design requirements of an Extra Hazard, Group 2 system.

903.2.15 Automatic sprinkler system – existing high-rise buildings. Regardless of any other provisions of these regulations, every existing high-rise building of Type II-B, Type III-B or Type V-B construction shall be provided with an approved automatic sprinkler system conforming to NFPA 13.

903.2.15.1 Existing R-1 and R-2 high-rise buildings fire-extinguishing systems. Automatic fire-extinguishing systems installed in any existing high-rise structure in which a Group R-1 or a Group R-2 occupancy is located shall have an approved flow indicator electrically interconnected to the required fire alarm system.

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903.2.16 Group L occupancies. An automatic sprinkler system shall be installed throughout buildings housing Group L occupancies. Sprinkler systems for Group L occupancy shall be designed for the square footage area of the Group L occupancy based on an area of sprinkler operation of 2,500 square feet (232 m [2] ) and design density of 0.20 gpm/sf.

In mixed occupancies, portions of floors with Group L occupancies, but not classified as Group L, shall be provided with a sprinkler protection system per NFPA 13.

CEBC § 903.2.11.5 High relevance — show source text

Exception: Ducts where the largest cross-sectional diameter of the duct is less than 10 inches (254 mm).

[F] 903.2.11.5 Commercial cooking operations. An automatic sprinkler system shall be installed in commercial kitchen exhaust hood and duct systems where an automatic sprinkler system is used to comply with Section 904.

[F] 903.2.11.6 Other required fire protection systems. In addition to the requirements of Section 903.2, the provisions indicated in Table 903.2.11.6 require the installation of a fire protection system for certain buildings and areas.

[F] TABLE 903.2.11.6—ADDITIONAL REQUIRED PROTECTION SYSTEMS	Col2
SECTION	SUBJECT
402.5, 402.6.2	Covered and open mall buildings
403.3	High-rise buildings_ and Group I-2 occupancies having occupied floors located more than 75 feet above the_ lowest level of fire department vehicle access
404.3	Atriums
405.3	Underground structures
406.6.4	Mechanical-access enclosed parking garages
407.7	Group I-2
410.6	Stages
411.3	Special amusement buildings
412.2.4	Airport traffic control towers
412.3.6, 412.3.6.1, 412.5.6	Aircraft hangars
415.11.11	Group H-5 HPM exhaust ducts
416.5	Flammable finishes
417.4	Drying rooms
424.3	Play structures

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[F] TABLE 903.2.11.6—ADDITIONAL REQUIRED PROTECTION SYSTEMS—continued	Col2
SECTION	SUBJECT
440	Horse racing stables
441	Pet kennels
449	Public libraries
453	Buildings containing_Group L occupancies_
507	Unlimited area buildings
508.5.7	Live/work units
509.4	Incidental uses
1030.6.2.3	Smoke-protected assembly seating
CFC	Automatic sprinkler system requirements as set forth in Section 903.2.11.6 of the_California Fire Code_
California Fire Code Section 1207	Stationary and mobile energy storage systems

903.2.13 Reserved.

CEBC § 2.1 High relevance — show source text
R307.2 Construction. Storm shelters shall be constructed in accordance with this code and ICC 500.

R307.2.1 Sealed documentation. The construction documents for all structural components and impact protective systems installed in storm shelters shall be prepared and sealed by a registered design professional indicating compliance with ICC 500.

Exception: Storm shelters, structural components and impact-protective systems that are listed and labeled to indicate compliance with ICC 500.

SECTION R308—SITE ADDRESS

R308.1 Address identification. Buildings shall be provided with approved address identification. The address identification shall be legible and placed in a position that is visible from the street or road fronting the property. Address identification characters shall contrast with their background. Address numbers shall be Arabic numbers or alphabetical letters. Numbers shall not be spelled out. Each character shall be not less than 4 inches (102 mm) in height with a stroke width of not less than 0.5 inch (12.7 mm). Where

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BUILDING PLANNING

required by the fire code official, address identification shall be provided in additional approved locations to facilitate emergency response. Where access is by means of a private road and the building address cannot be viewed from the public way, a monument, pole or other sign or means shall be used to identify the structure. Address identification shall be maintained.

SECTION R309—AUTOMATIC SPRINKLER SYSTEMS

R309.1 Townhouse automatic sprinkler systems. An automatic sprinkler system shall be installed in townhouses.

Exception: An automatic sprinkler system shall not be required where additions or alterations are made to existing townhouses that do not have an automatic sprinkler system installed.

R309.1.1 Design and installation. Automatic sprinkler systems for townhouses shall be designed and installed in accordance with Section R309 or NFPA 13D.

R309.2 One- and two-family dwellings automatic sprinkler systems. An automatic sprinkler system shall be installed in one- and two-family dwellings.

Exceptions:
1. An automatic sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with a sprinkler system. 2. Accessory Dwelling Unit, provided that all of the following are met: 2.1. The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2. 2.2. The existing primary residence does not have automatic fire sprinklers. 2.3. The accessory detached dwelling unit does not exceed 1,200 square feet in size. 2.4. The unit is on the same lot as the primary residence.
R309.2.1 Design and installation. Automatic sprinkler systems shall be designed and installed in accordance with Section R309 or NFPA 13D.

R309.3 Dwelling unit automatic sprinkler systems.
CEBC § 3310.2 High relevance — show source text
[F] 3310.2 Maintenance of means of egress. Means of egress and required accessible means of egress shall be maintained at all times during construction, demolition, remodeling or alterations and additions to any building.

Exception: Existing means of egress need not be maintained where approved temporary means of egress systems and facilities are provided.

SECTION 3311—STANDPIPES

[F] 3311.1 Where required. In buildings required to have standpipes by Section 905.3.1, not fewer than one standpipe shall be provided for use during construction. Such standpipes shall be installed prior to construction exceeding 40 feet (12 192 mm) in height above the lowest level of fire department vehicle access. Such standpipes shall be provided with fire department hose connections at locations adjacent to stairways complying with Section 3310.1. As construction progresses, such standpipes shall be extended to within one floor of the highest point of construction having secured decking or flooring.

[F] 3311.2 Buildings being demolished. Where a building is being demolished and a standpipe exists within such a building, such standpipe shall be maintained in an operable condition so as to be available for use by the fire department. Such standpipe shall be demolished with the building but shall not be demolished more than one floor below the floor being demolished.

[F] 3311.3 Detailed requirements. Standpipes shall be installed in accordance with the provisions of Chapter 9.

Exception: Standpipes shall be either temporary or permanent in nature, and with or without a water supply, provided that such standpipes conform to the requirements of Section 905 as to capacity, outlets and materials.

SECTION 3312—AUTOMATIC SPRINKLER SYSTEM

[F] 3312.1 Completion before occupancy. In buildings where an automatic sprinkler system is required by this code, it shall be unlawful to occupy any portion of a building or structure until the automatic sprinkler system installation has been tested and approved, except as provided in Section 111.3.

[F] 3312.2 Operation of valves. Operation of sprinkler control valves shall be permitted only by properly authorized personnel and shall be accompanied by notification of duly designated parties. When the sprinkler protection is being regularly turned off and on to facilitate connection of newly completed segments, the sprinkler control valves shall be checked at the end of each work period to ascertain that protection is in service.

SECTION 3313—WATER SUPPLY FOR FIRE PROTECTION

[F] 3313.1 Where required. An approved water supply for fire protection, either temporary or permanent, shall be made available as soon as combustible building materials arrive on the site, on commencement of vertical combustible construction, and on installation of a standpipe system in buildings under construction, in accordance with Sections 3313.2 through 3313.5.

Exception: The fire code official is authorized to reduce the fire-flow requirements for isolated buildings or a group of buildings in rural areas or small communities where the development of full fire-flow requirements is impractical.
CEBC § 8-303.6 High relevance — show source text
8-303.6 Light and ventilation. Windows in habitable rooms shall have an area of 6 percent of the floor area, or 6 square feet (0.56 m [2] ), whichever is greater. Windows in sleeping rooms shall be openable (see Section 8-503). Residential occupancies need not be provided with electrical lighting.

8-303.7 Alteration and repair. The alteration and repair of qualified historical buildings or properties may permit the replacement, retention and extension of original materials and the continued use of original methods of construction, provided a life safety hazard is not created or continued. Alterations and repairs shall be consistent with the CHBC.

The amount of alterations and repairs is not limited, provided there is no nonhistorical increase in floor area, volume or size of the building or property.

8-303.8 Exiting. See Chapter 8-5.

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8-4 FIRE PROTECTION

SECTION 8-401 — PURPOSE, INTENT AND SCOPE

8-401.1 Purpose. The purpose of this chapter is to provide regulations for fire protection of qualified historical buildings or properties. The CHBC requires enforcing agencies to accept any reasonably equivalent alternatives to the regular code when dealing with qualified historical buildings or properties.

8-401.2 Intent. The intent of the CHBC is to preserve the integrity of qualified historical buildings or properties while maintaining a reasonable degree of fire protection based primarily on the life safety of the occupants and firefighting personnel.

8-401.3 Scope. This chapter shall apply when required by the provisions of Section 8-102.

SECTION 8-402 — FIRE-RESISTIVE CONSTRUCTION

8-402.1 Exterior wall construction. The fire-resistance requirement for existing exterior walls and existing opening protection may be satisfied when an automatic sprinkler system designed for exposure protection is installed per the CHBC. The automatic sprinklers may be installed on the exterior with at least one sprinkler located over each opening required to be protected. Additional sprinklers shall also be distributed along combustible walls under the roof lines that do not meet the fire-resistive requirement due to relationship to property lines as required by regular code. Such sprinkler systems may be connected to the domestic water supply on the supply-main side of the building shut-off valve. A shut-off valve may be installed for the sprinkler system, provided it is locked in an open position.

8-402.2 One-hour construction. Upgrading an existing qualified historical building or property to one-hour fire-resistive construction and one-hour fire-resistive corridors shall not be required regardless of construction or occupancy when one of the following is provided:
1. An automatic sprinkler system throughout. See Section 8-410 for automatic sprinkler systems.
2. An approved life safety evaluation.
3. Other alternative measures as approved by the enforcing agency.
8-402.3 Openings in fire-rated systems. Historical glazing materials and solid wood unrated doors in interior walls required to have one-hour fire rating may be approved when operable windows and doors are provided with appropriate smoke seals and when the area affected is provided with an automatic sprinkler system. See Section 8-410 for automatic sprinkler systems.

SECTION 8-403 — INTERIOR FINISH MATERIALS
CEBC § 1.1 High relevance — show source text
SECTION R309—AUTOMATIC SPRINKLER SYSTEMS

R309.1 Townhouse automatic sprinkler systems. An automatic sprinkler system shall be installed in townhouses.

Exception: An automatic sprinkler system shall not be required where additions or alterations are made to existing townhouses that do not have an automatic sprinkler system installed.

R309.1.1 Design and installation. Automatic sprinkler systems for townhouses shall be designed and installed in accordance with Section R309 or NFPA 13D.

R309.2 One- and two-family dwellings automatic sprinkler systems. An automatic sprinkler system shall be installed in one- and two-family dwellings.

Exceptions:
1. An automatic sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with a sprinkler system. 2. Accessory Dwelling Unit, provided that all of the following are met: 2.1. The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2. 2.2. The existing primary residence does not have automatic fire sprinklers. 2.3. The accessory detached dwelling unit does not exceed 1,200 square feet in size. 2.4. The unit is on the same lot as the primary residence.
R309.2.1 Design and installation. Automatic sprinkler systems shall be designed and installed in accordance with Section R309 or NFPA 13D.

R309.3 Dwelling unit automatic sprinkler systems.

R309.3.1 General. The design and installation of automatic sprinkler systems shall be in accordance with NFPA 13D or Section R309.3, which shall be considered to be equivalent to NFPA 13D. Partial automatic sprinkler systems shall be permitted to be installed only in buildings not required to be equipped with an automatic sprinkler system. Section R309.3 shall apply to standalone and multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A multipurpose automatic sprinkler system shall provide domestic water to both fire sprinklers and plumbing fixtures. A stand-alone automatic sprinkler system shall be separate and independent from the water distribution system.

R309.3.1.1 Backflow protection. A backflow preventer shall not be required to separate a sprinkler system from the water distri- bution system, provided that: 1. The system complies with NFPA 13D or Section R309; 2. Piping materials are suitable for potable water in accordance with the California Plumbing Code; and 3. The system does not contain antifreeze or have a fire department connection.

R309.3.1.2 Required sprinkler locations. Sprinklers shall be installed to protect all areas of a dwelling unit.
CEBC § 901.4.3 High relevance — show source text
901.4.3 Alterations in buildings and structures. For any alteration within a building or structure, the fire protection and life safety systems shall be extended, altered or augmented to maintain and continue protection within the building or structure. Persons shall not remove or modify any fire protection or life safety system installed or maintained under the provisions of this code or the California Building Code without approval from the fire code official.

901.4.4 Fire areas. Where buildings, or portions thereof, are divided into fire areas so as not to exceed the limits established for requiring a fire protection system in accordance with this chapter, such fire areas shall be separated by fire barriers constructed in accordance with Section 707 of the California Building Code or horizontal assemblies constructed in accordance with Section 711 of the California Building Code, or both, having a fire-resistance rating of not less than that determined in accordance with Section 707.3.10 of the California Building Code .

901.4.5 Additional fire protection systems. In occupancies of a hazardous nature, where special hazards exist in addition to the normal hazards of the occupancy, or where the fire code official determines that access for fire apparatus is unduly difficult, the fire code official shall have the authority to require additional safeguards and fire protection systems. Fire protection and life safety systems required under this section shall be installed in accordance with this code and the applicable referenced standards.

901.4.6 Appearance of equipment. Any device that has the physical appearance of life safety or fire protection equipment but that does not perform that life safety or fire protection function shall be prohibited.

901.4.7 Pump and riser room size. Where provided, fire pump rooms and automatic sprinkler system riser rooms shall be designed with adequate space for all equipment necessary for the installation, as defined by the manufacturer, with sufficient working space around the stationary equipment. Clearances around equipment to elements of permanent construction, including other installed equipment and appliances, shall be sufficient to allow inspection, service, repair or replacement without removing such elements of permanent construction or disabling the function of a required fire-resistance-rated assembly. Fire

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pump and automatic sprinkler system riser rooms shall be provided with doors and unobstructed passageways large enough to allow removal of the largest piece of equipment.

901.4.7.1 Access. Automatic sprinkler system risers, fire pumps and controllers shall be provided with ready access. Where located in a fire pump room or automatic sprinkler system riser room, the door shall be permitted to be locked provided that the key is available at all times.

901.4.7.2 Marking on access doors. Access doors for automatic sprinkler system riser rooms and fire pump rooms shall be labeled with an approved sign. The lettering shall be in contrasting color to the background. Letters shall have a minimum height of 2 inches (51 mm) with a minimum stroke of [3] / 8 inch (10 mm).

901.4.7.3 Environment. Automatic sprinkler system riser rooms and fire pump rooms shall be maintained at a temperature of not less than 40°F (4°C). Heating units shall be permanently installed.

901.4.7.4 Lighting. Permanently installed artificial illumination shall be provided in the automatic sprinkler system riser rooms and fire pump rooms.
CEBC § 9-18 High relevance — show source text
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[F] 904.11.1.4 Secondary water supply. Where a secondary water supply is required for an automatic sprinkler system, an automatic water mist system shall be provided with an approved secondary water supply.

[F] 904.11.2 Water mist system supervision and alarms. Supervision and alarms shall be provided as required for automatic sprinkler systems in accordance with Section 903.4.1.

[F] 904.11.2.1 Monitoring. Monitoring shall be provided as required for automatic sprinkler systems in accordance with Section 903.4.2.

[F] 904.11.2.2 Alarms. Alarms shall be provided as required for automatic sprinkler systems in accordance with Section 903.4.3.

[F] 904.11.2.3 Floor control valves. Floor control valves shall be provided as required for automatic sprinkler systems in accordance with Section 903.3.9.

[F] 904.11.3 Testing and maintenance. Automatic water mist systems shall be tested and maintained in accordance with the California Code of Regulations, Title 19, Division 1, Chapter 5 and California Fire Code .

[F] 904.12 Hybrid fire extinguishing systems. Hybrid fire extinguishing systems shall be designed, installed, maintained, periodically inspected and tested in accordance with NFPA 770. Records of inspection and testing shall be maintained.

[F] 904.13 Aerosol fire-extinguishing systems. Aerosol fire-extinguishing systems shall be installed, maintained, periodically inspected and tested in accordance with NFPA 2010, and their listing.

Such devices and appurtenances shall be listed and installed in compliance with manufacturers’ instructions.

[F] 904.14 Commercial cooking systems. Commercial cooking equipment that produces grease-laden vapors shall be provided with a Type I Hood, in accordance with the California Mechanical Code, and an automatic fire extinguishing system that is listed and labeled for its intended use as follows:

1. Wet chemical extinguishing system, complying with UL 300. 2. Carbon dioxide extinguishing systems. 3. Automatic fire sprinkler systems.

All existing dry chemical and wet chemical extinguishing systems shall comply with UL 300.

Exception: Public school kitchens, without deep-fat fryers, shall be upgraded to a UL 300-compliant system during state-funded modernization projects that are under the jurisdiction of the Division of the State Architect.

All systems shall be installed in accordance with the California Mechanical Code, appropriate adopted standards, their listing and the manufacturer's installation instructions.

Exception: Factory-built commercial cooking recirculating systems that are tested in accordance with UL 710B and listed, labeled and installed in accordance with the California Mechanical Code.
CEBC § 1105.9 High relevance — show source text
1105.9 Group I-2 automatic sprinkler system. An automatic sprinkler system installed in accordance with Section 903.3.1.1 shall be provided throughout the floor containing the Group I-2 fire area. The sprinkler system shall be provided throughout the floor where the Group I-2 occupancy is located, on all floors between the Group I-2 occupancy fire area and the level of exit discharge, the level of exit discharge, and all floors below the level of exit discharge.

Exception: Floors classified as an open parking garage are not required to be sprinklered.

1105.10 Group I-2 automatic fire alarm system. An automatic fire alarm system shall be installed in existing Group I-2 occupancies in accordance with Section 907.2.6.2.

Exception: Manual fire alarm boxes in patient sleeping areas shall not be required at exits if located at all nurses’ control stations or other constantly attended staff locations, provided such that manual fire alarm boxes are visible, are provided with ready access, and travel distances required in Section 907.4.2.1 are not exceeded.

1105.11 Essential electrical systems. Essential electrical systems in Group I-2, Condition 2 occupancies shall be in accordance with Sections 1105.11.1 and 1105.11.2.

1105.11.1 Where required. Where required by NFPA 99, Group I-2, Condition 2 occupancies shall be provided with an essential electrical system in accordance with NFPA 99.

1105.11.2 Installation and duration. In Group I-2, Condition 2 occupancies, the installation and duration of operation of existing essential electrical systems shall be based on a hazard vulnerability analysis conducted in accordance with NFPA 99.

1105.12 Group I-2 separations between construction areas. In an existing Group I-2 occupancy, areas of construction, alteration or demolition shall be separated from occupied portions of the building. Where, in accordance with Section 701.2, the maintenance of fire- resistance-rated construction is not required, separations used to separate areas of construction, alteration, or demolition from occu- pied portions of the building shall be constructed of materials that comply with one of the following: 1. Floors and nonbearing walls and partitions in accordance with California Building Code Chapter 6 and Table 601. 2. Noncombustible nonbearing walls and partitions.

1105.12.1 Minor work . Where minor building work identified in California Building Code Section 105.2, Item 7 is provided with a sepa- ration from occupied portions of the building, materials that provide such separation shall be approved by the fire code official and shall comply with one of the following: 1. Floors and nonbearing walls and partitions in accordance with California Building Code Chapter 6 and Table 601. 2. Noncombustible nonbearing walls and partitions. 3. Materials that exhibit a flame spread index not exceeding 25 when tested in accordance with ASTM E84 or UL 723. 4. Materials exhibiting a heat peak release rate not exceeding 300 kW/m2 when tested in accordance with ASTM E1354 at an incident heat flux of 50 kW/m2 in the horizontal orientation on specimens at the thickness intended for use.

SECTION 1106—REQUIREMENTS FOR OUTDOOR OPERATIONS
CEBC § 802.5.2 High relevance — show source text
802.5.2 Design. Where there are no guards or where existing guards must be replaced, the guards shall be designed and installed in accordance with the California Building Code .

802.6 Fire-resistance ratings. Where approved by the code official, buildings where an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 of the California Building Code has been added, and the building is now sprinklered throughout, the required fire-resistance ratings of building elements and materials shall be permitted to meet the requirements of the current building code. The building is required to meet the other applicable requirements of the California Building Code .

Plans, investigation and evaluation reports, and other data shall be submitted indicating which building elements and materials the applicant is requesting the code official to review and approve for determination of applying the current building code fire-resistance ratings. Any special construction features, including fire-resistance-rated assemblies and smoke-resistive assemblies, conditions of occupancy, means-of-egress conditions, fire code deficiencies, approved modifications or approved alternative materials, design and methods of construction, and equipment applying to the building that impact required fire-resistance ratings shall be identified in the evaluation reports submitted.

SECTION 803—FIRE PROTECTION

803.1 Scope. The requirements of this section shall be limited to work areas in which Level 2 alterations are being performed, and where specified they shall apply throughout the floor on which the work areas are located or otherwise beyond the work area.

803.1.1 Corridor ratings. Where an approved automatic sprinkler system is installed throughout the story, the required fire-resistance rating for any corridor located on the story shall be permitted to be reduced in accordance with the California Building Code . In order to be considered for a corridor rating reduction, such system shall provide coverage for the stairway landings serving the floor and the intermediate landings immediately below.

803.2 Automatic sprinkler systems. Automatic sprinkler systems shall be provided in accordance with the requirements of Section 903 of the California Building and California Fire Codes.

803.3 Reserved.

803.4 Fire alarm and detection. An approved fire alarm system shall be installed in accordance with California Fire Code Sections 907 and 1103.7.

803.4.1 Systems out of service. Existing fire alarm and detection systems shall be maintained in accordance with Section 901.7 of the California Fire Code. Site fire protection during construction shall be in accordance with Chapter 33 of the California Building and California Fire Codes.

SECTION 804—MEANS OF EGRESS

804.1 Scope. The requirements of this section shall be limited to work areas that include exits or corridors shared by more than one tenant within the work area in which Level 2 alterations are being performed, and where specified they shall apply throughout the floor on which the work areas are located or otherwise beyond the work area.

804.2 General. The means of egress shall comply with the requirements of this section.

Exceptions:
1. Where the work area and the means of egress serving it complies with NFPA 101.
2. Means of egress complying with the requirements of the building code under which the building was constructed shall be considered to be compliant means of egress if, in the opinion of the code official, they do not constitute a distinct hazard to life.
804.3 Reserved.
CEBC § 1508.1 High relevance — show source text
[BE] 1508.1 Stairways required. Where building construction exceeds 40 feet (12 192 mm) in height above the lowest level of fire department vehicle access, a temporary or permanent stairway shall be provided. As construction progresses, such stairway shall be extended to within one floor of the highest point of construction having secured decking or flooring.

[F] 1508.2 Maintenance of means of egress. Means of egress and required accessible means of egress shall be maintained at all times during construction, demolition, remodeling or alterations and additions to any building.

Exception: Existing means of egress need not be maintained where approved temporary means of egress and accessible means of egress systems and facilities are provided.

SECTION 1509—STANDPIPES

[F] 1509.1 Where required. In buildings required to have standpipes by Section 905.3.1 of the California Building Code, not less than one standpipe shall be provided for use during construction. Such standpipes shall be installed prior to construction exceeding 40 feet (12 192 mm) in height above the lowest level of fire department vehicle access. Such standpipes shall be provided with fire department hose connections at locations adjacent to stairways, complying with Section 1508.1. As construction progresses, such standpipes shall be extended to within one floor of the highest point of construction having secured decking or flooring.

[F] 1509.2 Buildings being demolished. Where a building or portion of a building is being demolished and a standpipe is existing within such a building, such standpipe shall be maintained in an operable condition so as to be available for use by the fire department. Such standpipe shall be demolished with the building but shall not be demolished more than one floor below the floor being demolished.

[F] 1509.3 Detailed requirements. Standpipes shall be installed in accordance with the provisions of Chapter 9 of the California Building Code .

Exception: Standpipes shall be either temporary or permanent in nature, and with or without a water supply, provided that such standpipes conform to the requirements of Section 905 of the California Building Code as to capacity, outlets and materials.

SECTION 1510—AUTOMATIC SPRINKLER SYSTEM

[F] 1510.1 Completion before occupancy. In buildings where an automatic sprinkler system is required by this code or the California Building Code, it shall be unlawful to occupy any portions of a building or structure until the automatic sprinkler system installation has been tested and approved, except as provided in Section 110.3.

[F] 1510.2 Operation of valves. Operation of sprinkler control valves shall be permitted only by properly authorized personnel and shall be accompanied by notification of duly designated parties. When the sprinkler protection is being regularly turned off and on to

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CONSTRUCTION SAFEGUARDS

facilitate connection of newly completed segments, the sprinkler control valves shall be checked at the end of each work period to ascertain that protection is in service.

SECTION 1511—ACCESSIBILITY

[BE] 1511.1 Construction sites. Structures, sites and equipment directly associated with the actual process of construction, including, but not limited to, scaffolding, bridging, material hoists, material storage or construction trailers, are not required to be accessible.
CEBC § 903.4 High relevance — show source text
903.4 Sprinkler system supervision and alarms. Automatic sprinkler system supervision and alarms shall comply with Sections 903.4.1 through 903.4.3.

903.4.1 Electronic supervision. Valves controlling the water supply for automatic sprinkler systems, pumps, tanks, water levels and temperatures, critical air pressures and waterflow switches on all automatic sprinkler systems shall be electrically supervised by a listed fire alarm control unit.

Exceptions:
1. Automatic sprinkler systems protecting one- and two-family dwellings.
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FIRE PROTECTION AND LIFE SAFETY SYSTEMS
1. Limited area sprinkler systems in accordance with Section 903.3.8, provided that backflow prevention device test valves located in limited area sprinkler system supply piping shall be locked in the open position unless supplying an occupancy required to be equipped with a fire alarm system, in which case the backflow preventer valves shall be electrically supervised by a tamper switch installed in accordance with NFPA 72 and separately annunciated.
2. Automatic sprinkler systems installed in accordance with NFPA 13R where a common supply main is used to supply both domestic water and the automatic sprinkler system, and a separate shutoff valve for the automatic sprinkler system is not provided.
3. Jockey pump control valves that are sealed or locked in the open position.
4. Control valves to commercial kitchen hoods, paint spray booths or dip tanks that are sealed or locked in the open position.
5. Valves controlling the fuel supply to fire pump engines that are sealed or locked in the open position.
6. Trim valves to pressure switches in dry, preaction and deluge sprinkler systems that are sealed or locked in the open position.
7. Underground key or hub gate valves in roadway boxes.
903.4.2 Monitoring. Alarm, supervisory and trouble signals shall be distinctly different and shall be automatically transmitted to an approved supervising station or, where approved by the fire code official, shall sound an audible signal at a constantly attended location.

903.4.3 Alarms. An approved audible and visual sprinkler waterflow alarm device, located on the exterior of the building in an approved location, shall be connected to each automatic sprinkler system. Such sprinkler waterflow alarm devices shall be activated by water flow equivalent to the flow of a single sprinkler of the smallest orifice size installed in the system. Where a waterflow switch is required by Section 903.4.1 to be electrically supervised, such sprinkler waterflow alarm devices shall be powered by a fire alarm control unit or, where provided, a fire alarm system. Where a fire alarm system is provided, actuation of the automatic sprinkler system shall actuate the building fire alarm system.

Exception: Automatic sprinkler systems protecting one- and two-family dwellings.

903.5 Inspection, testing and maintenance. Automatic sprinkler systems shall be inspected, tested and maintained in accordance with Section 901.

903.6 Where required in existing buildings and structures. An automatic sprinkler system shall be provided in existing buildings and structures where required in Chapter 11.

SECTION 904—ALTERNATIVE AUTOMATIC FIRE-EXTINGUISHING SYSTEMS

904.1 General. Automatic fire-extinguishing systems, other than automatic sprinkler systems, shall be designed, installed, inspected, tested and maintained in accordance with the provisions of this section and the applicable referenced standards.
CEBC § 2.1 High relevance — show source text
R309.2.1 Design and installation. Automatic sprinkler systems shall be designed and installed in accordance with Section R309 or NFPA 13D.

R309.3 Dwelling unit automatic sprinkler systems.

R309.3.1 General. The design and installation of automatic sprinkler systems shall be in accordance with NFPA 13D or Section R309.3, which shall be considered to be equivalent to NFPA 13D. Partial automatic sprinkler systems shall be permitted to be installed only in buildings not required to be equipped with an automatic sprinkler system. Section R309.3 shall apply to standalone and multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A multipurpose automatic sprinkler system shall provide domestic water to both fire sprinklers and plumbing fixtures. A stand-alone automatic sprinkler system shall be separate and independent from the water distribution system.

R309.3.1.1 Backflow protection. A backflow preventer shall not be required to separate a sprinkler system from the water distri- bution system, provided that: 1. The system complies with NFPA 13D or Section R309; 2. Piping materials are suitable for potable water in accordance with the California Plumbing Code; and 3. The system does not contain antifreeze or have a fire department connection.

R309.3.1.2 Required sprinkler locations. Sprinklers shall be installed to protect all areas of a dwelling unit.

Exceptions:
1. Attics, crawl spaces and normally unoccupied concealed spaces that do not contain fuel-fired appliances do not require sprinklers. In attics, crawl spaces and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be installed above the equipment; however, sprinklers shall not be required in the remainder of the space.
2. Clothes closets, linen closets and pantries not exceeding 24 square feet (2.2 m [2] ) in area, with the smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling surfaces of gypsum board.
3. Bathrooms not more than 55 square feet (5.1 m [2] ) in area.
4. Garages; carports; exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door; and similar areas.
R309.3.2 Sprinklers. Sprinklers shall be new listed residential sprinklers and shall be installed in accordance with the sprinkler manufacturer’s instructions.

R309.3.2.1 Temperature rating and separation from heat sources. Except as provided for in Section R309.3.2, sprinklers shall have a temperature rating of not less than 135°F (57°C) and not more than 225°F (107°C). Sprinklers shall be separated from heat sources as required by the sprinkler manufacturer’s installation instructions.

R309.3.2.2 Intermediate temperature sprinklers. Sprinklers shall have an intermediate temperature rating not less than 175°F (79°C) and not more than 225°F (107°C) where installed in the following locations:
1. Directly under skylights, where the sprinkler is exposed to direct sunlight.
2. In attics.
3. In concealed spaces located directly beneath a roof.
4. Within the distance to a heat source as specified in Table R309.3.2.2 .
CEBC § 903.3.2 High relevance — show source text
[F] 903.3.2 Quick-response and residential sprinklers. Where automatic sprinkler systems are required by this code, quickresponse or residential automatic sprinklers shall be installed in all of the following areas in accordance with Section 903.3.1 and their listings:
1. Throughout all spaces within a smoke compartment containing care recipient sleeping units in Group I-2 in accordance with this code.
2. Reserved.
3. Throughout all spaces within a smoke compartment containing treatment rooms in ambulatory care facilities.
4. Dwelling units and sleeping units in Group R occupancies.
5. Light-hazard occupancies as defined in NFPA 13.
[F] 903.3.3 Obstructed locations. Automatic sprinklers shall be installed with regard to obstructions that will delay activation or obstruct the water distribution pattern and shall be in accordance with the applicable automatic sprinkler system standard that is being used. Automatic sprinklers shall be installed in or under covered kiosks, displays, booths, concession stands, or equipment that exceeds 4 feet (1219 mm) in width. Not less than a 3-foot (914 mm) clearance shall be maintained between automatic sprinklers and the top of piles of combustible fibers.

Exception: Kitchen equipment under exhaust hoods protected with a fire-extinguishing system in accordance with Section 904.

[F] 903.3.4 Actuation. Automatic sprinkler systems shall be automatically actuated unless specifically provided for in this code.

[F] 903.3.5 Water supplies. Water supplies for automatic sprinkler systems shall comply with this section and the standards referenced in Section 903.3.1. The potable water supply shall be protected against backflow in accordance with the Health and Safety Code Section 13114.7 . For connections to public waterworks systems, the water supply test used for design of fire protection systems shall be adjusted to account for seasonal and daily pressure fluctuations based on information from the water supply authority and as approved by the fire code official.

[F] 903.3.5.1 Domestic services. Where the domestic service provides the water supply for the automatic sprinkler system, the supply shall be in accordance with this section.

[F] 903.3.5.2 Residential combination services. A single combination water supply shall be allowed provided that the domestic demand is added to the sprinkler demand as required by NFPA 13R.

[F] 903.3.6 Hose threads. Fire hose threads and fittings used in connection with automatic sprinkler systems shall be as prescribed by the fire code official.

[F] 903.3.7 Fire department connections. Fire department connections for automatic sprinkler systems shall be installed in accordance with Section 912.

[F] 903.3.8 Limited area sprinkler systems. Limited area sprinkler systems shall be in accordance with the standards listed in Section 903.3.1 except as provided in Sections 903.3.8.1 through 903.3.8.5.

[F] 903.3.8.1 Number of sprinklers. Limited area sprinkler systems shall not exceed six sprinklers in any single fire area.

[F] 903.3.8.2 Occupancy hazard classification. Only areas classified by NFPA 13 as Light Hazard or Ordinary Hazard Group 1 shall be permitted to be protected by limited area sprinkler systems.

Frequently asked questions

Where in the CEBC is the “no‑occupancy until sprinklers tested and approved” rule?

That rule is in CEBC § 1510.1: you may not occupy any portion of a building required to be sprinklered until the sprinkler system installation has been tested and approved.

Who may operate sprinkler control valves during construction?

Only properly authorized personnel may operate sprinkler control valves; when valves are turned off/ on to facilitate staged connections they must be checked at the end of each work period to ensure the protection is in service (CEBC § 1510.2).

If part of a building is ready, can that part be occupied while other parts are still under construction?

Only if the portion to be occupied has the required sprinkler protection installed, tested and approved. The CEBC prohibits occupying any portion required to be sprinklered until approval (CEBC § 1510.1).

Where do I find the detailed rules for fire protection during construction (fire watch, impairments, temporary water)?

Those details are in Chapter 33 of the California Fire Code; the Building Code and CEBC point construction/alteration/demolition sprinkler requirements to CFC Chapter 33 (see CBC 903.2.12 and CFC Chapter 33).

I requested a citation to § 3303.7 — do you have that text?

I could not find a section labeled 3303.7 in the uploaded files. The CEBC/CFC excerpts I have do show Chapter 33 topics and specific sections (for example 3306.5) but not § 3303.7. If you can provide the file or confirm the exact edition/section text, I will cite it directly.

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California Existing Building Code