CEBC · California Existing Building Code
When does the CEBC require compliance for a change of occupancy?
If your building’s use change results in a different occupancy classification, the CEBC requires that the space be made to comply with the applicable Chapter 10 rules and that a certificate of occupancy be issued for the new classification (see **§ 1001.1** and **§ 1001.3**) .
Last reviewed: July 6, 2026
What the code requires — plain English (controlling §)
A change of occupancy to a different occupancy classification must be made to comply with the CEBC and a certificate of occupancy is required when the change results in a different classification. The general requirement that a change of occupancy must comply with the CEBC is stated in § 1001.1 and the certificate requirement is stated in § 1001.3 .
If the use or occupancy of a building changes so the building is assigned a different occupancy classification, the building must be brought into compliance as required by the CEBC and a certificate of occupancy must be issued for the new classification (see § 1001.1 and § 1001.3).
Requirements in detail
When compliance is triggered
- Any building or portion of a building that undergoes a change of occupancy is governed by the Chapter 10 provisions: the chapter applies when “a change of occupancy occurs” (scope in § 1001.1) .
- A certificate of occupancy is required where the change “results in a different occupancy classification as determined by the California Building Code” (see § 1001.3) .
What “comply” means (high level)
- The building/space must be made to comply with the requirements in this chapter and other applicable CEBC sections (means of egress, fire protection, structural, systems) applicable to the new occupancy. See CEBC cross-references in Chapter 10 (for example, Sections 1004, 1005, 1006 and 1011) for specific element requirements.
Decision-relevant dimensions (quick reference table)
| Decision dimension | Decision rule / value | What CEBC requires | Code Reference |
|---|---|---|---|
| Change results in a different occupancy classification? | Yes → compliance + certificate | Must comply with Chapter 10 provisions and obtain certificate of occupancy | § 1001.3 |
| Any change of occupancy | Trigger for Chapter 10 provisions | Provisions of Chapter 10 apply when a change of occupancy occurs | § 1001.1 |
| Fire protection differences (system threshold changed) | If threshold in CBC Chapter 9 differs for new use | Fire protection requirements in Section 1011 apply | § 1004.1 |
| Means of egress for higher-hazard change | Change to a higher-hazard category | Means of egress must comply with CBC Chapter 10 (CEBC §1011 cross-reference) | § 1011.5.1 |
| Structural/live-load effect | Area with change carries new live loads | Structural elements must meet CBC Section 1607 or be shown acceptable under CEBC exceptions | § 1006.1 |
| Small-area exception | New occupancy area < 10 percent of building area (certain cases) | Some structural, snow/wind, seismic triggers may not apply (see exceptions) | See exception language in Sections 1006 / related text |
Notes:
- The CEBC does not require wholesale conversion to new-construction standards in every case; the Chapter gives targeted requirements and cross-references to the CBC where full new-construction requirements are needed.
How the certificate of occupancy fits in
- A certificate of occupancy must be issued where a change of occupancy results in a different occupancy classification, after the code official determines the new classification requirements are met (see § 1001.3 and related § 1001.2 series).
Exceptions & special cases
- A jurisdiction may allow a reduced scope of upgrades where the new occupancy is less hazardous (based on life and fire risk) than the old occupancy; the fire code includes a similar exception permitting changes without full compliance if the new use is less hazardous, subject to approval by the official. This policy appears in CEBC change-of-occupancy provisions and the Fire Code (see CEBC §1001.1 context and Fire Code §102.3) .
- Some structural and seismic triggers include numerical exceptions: for example, certain seismic/structural upgrade triggers do not apply if the new-occupancy area is less than 10 percent of the building area; CEBC text includes this 10 percent threshold in exceptions to Sections addressing live load and seismic applicability. Where present, the CEBC requires consideration of the cumulative effect of occupancy changes over time.
- If only the use (activity) changes but the occupancy classification remains the same, the CEBC still regulates work associated with the change of use and cross-references Chapter 6 classification-of-work rules; a change of use can trigger compliance with Sections 1002–1010 even without a classification change (see § 1001.2.1 and § 1001.2.2).
If a specific exception or alternative compliance path is claimed, it must be approved by the code official; do not assume exceptions apply without official approval.
Common mistakes
- Treating any minor tenant fit-out as not triggering CEBC requirements. The CEBC applies when a change of occupancy occurs, not only for large renovations — whether the occupancy classification changes is the key trigger (see § 1001.1 and § 1001.3) .
- Failing to obtain a new certificate of occupancy when the occupancy classification changes; CEBC § 1001.3 explicitly requires it.
- Assuming “less hazardous” changes never require any upgrades. The code official may allow reduced requirements, but the change still must be documented and approved (see the CEBC and Fire Code exception language) .
- Overlooking element-specific triggers (egress, fire protection, structural, electrical). Chapter 10 cross-references Sections 1004–1007 and Section 1011 for specific component requirements; each must be checked for the specific change.
Worked example — concrete scenario
Scenario: A building contains a 5,000 ft² tenant space currently classified Group B (business). The owner proposes converting that tenant space to a Group A-2 restaurant. The occupancy classification changes from Group B to Group A (different classification).
Application of CEBC:
- The conversion is a change of occupancy that results in a different occupancy classification → Chapter 10 applies and the owner must comply with CEBC provisions for the new occupancy (trigger per § 1001.1) .
- Because the classification changes, a certificate of occupancy must be issued for the new Group A-2 classification once the new-occupancy requirements are met (requirement per § 1001.3) .
- The owner must verify egress, fire protection, structural live loads, and electrical system requirements applicable to an A-2 occupancy. Where the new use requires different fire-protection thresholds or higher-hazard egress provisions, the CEBC directs application of Section 1011 and cross-referenced CBC chapters (means-of-egress and fire protection) — those targeted upgrades must be completed or accepted by the code official. .
- If the restaurant area were under 10 percent of the overall building area, some structural/seismic triggers might be excepted (see CEBC exceptions), but that exception would have to be confirmed against the specific Section language and with the code official. In this example (5,000 ft²), the owner must compare the tenant area to the building area to test the 10 percent threshold found in CEBC exceptions.
Related CEBC provisions (quick list)
- § 1001.1 — Scope; Chapter 10 applies when a change of occupancy occurs.
- § 1001.2 / § 1001.2.1 / § 1001.2.2 — Certificate of occupancy and change-of-use vs. change-of-classification rules.
- § 1001.3 — Certificate of occupancy required when a change results in a different occupancy classification.
- § 1004.1 — Fire protection requirements apply where change of occupancy occurs or fire-protection thresholds differ.
- § 1005.1 — Means of egress requirements for changes of occupancy (see also § 1011).
- § 1006.1–1006.3 — Structural live-load, snow/wind and seismic considerations when occupancy changes. (Includes the 10 percent area exceptions.)
- § 1011.5.1 — Means-of-egress requirements for a change to a higher-hazard category.
- Fire Code § 102.3 — Fire Code requirement that a change of occupancy shall not be made unless the use is made to comply with the Fire Code and CEBC (useful cross-reference).
If you want, I can:
- Walk through the specific CEBC subsections that apply to egress, fire protection, structural upgrades for your exact change-of-occupancy scenario (provide existing and proposed occupancy classifications and building area), or
- Draft a checklist you can present to the code official or plan reviewer that maps required evidence to each CEBC / CBC subsection.
Code references
Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:
CEBC § 1.1 High relevance — show source text
Exception: The building need not be made to comply with Chapter 16 A of the California Building Code unless required by Section 506 A .5.
506 A .1.1 Change in function . A change in function shall require compliance with all the functional requirements for new construc- tion in the California Building Code, including requirements in California Building Code Section 1224. Compliance shall be only as necessary to meet the specific provisions and is not intended to require the entire building be brought into compliance.
Exception: Minimum room clearances, areas and dimensions may meet the requirements of the 2001 California Building Code for existing rooms re-used for a similar purpose, subject to the approval of OSHPD.
506 A .2 Certificate of occupancy. A certificate of occupancy shall be issued where it has been determined that the requirements for the new occupancy classification have been met.
506 A .3 Stairways. An existing stairway shall not be required to comply with the requirements of Section 1011 of the California Build- ing Code where the existing space and construction does not allow a reduction in pitch or slope.
506 A .4 Existing emergency escape and rescue openings. Where a change of occupancy would require an emergency escape and rescue opening in accordance with Section 1031.1 of the California Building Code, operable windows serving as the emergency escape and rescue opening shall comply with the following:
- An existing operable window shall provide a minimum net clear opening of 4 square feet (0.38 m [2] ) with a minimum net clear opening height of 22 inches (559 mm) and a minimum net clear opening width of 20 inches (508 mm).
- A replacement window where such window complies with both of the following: 2.1. The replacement window meets the size requirements in Item 1. 2.2. The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be permitted to be of the same operating style as the existing window or a style that provides for an equal or greater window opening area than the existing window.
506 A .5 Structural. Any building undergoing a change of occupancy shall satisfy the requirements of this section.
506 A .5.1 Live loads. Structural elements carrying tributary live loads from an area with a change of occupancy shall satisfy the requirements of Section 1607 A of the California Building Code . Design live loads for areas of new occupancy shall be based on Section 1607 A of the California Building Code . Design live loads for other areas shall be permitted to use previously approved design live loads.
Exception: Structural elements whose demand-capacity ratio considering the change of occupancy is not more than 5 percent greater than the demand-capacity ratio based on previously approved live loads need not comply with this section.
506 A .5.2 Snow and wind loads. Where a change of occupancy results in a structure being assigned to a higher risk category, the structure shall satisfy the requirements of Sections 1608 A and 1609 A of the California Building Code for the new risk category.
Exception: Where the area of the new occupancy is less than 10 percent of the building area, compliance with this section is not required. The cumulative effect of occupancy changes over time shall be considered.
CEBC § 506.1 High relevance — show source text
SECTION 506—CHANGE OF OCCUPANCY
506.1 Compliance. A change of occupancy shall not be made in any building unless that building is made to comply with the requirements of the California Building Code for the use or occupancy. Changes of occupancy in a building or portion thereof shall be such that the existing building is not less complying with the provisions of this code than the existing building or structure was prior to the change. Subject to the approval of the code official, changes of occupancy shall be permitted without complying with all of the requirements of this code for the new occupancy, provided that the new occupancy is less hazardous, based on life and fire risk, than the existing occupancy.
Exception: The building need not be made to comply with Chapter 16 of the California Building Code unless required by Section 506.5.
506.1.1 Change in the character of use. A change of occupancy with no change of occupancy classification shall not be made to any structure that will subject the structure to any special provisions of the applicable California Codes, without approval of the code official. Compliance shall be only as necessary to meet the specific provisions and is not intended to require the entire building be brought into compliance.
506.1.2 Change in function. [OSHPD 1R, 2, 4 and 5] A change in function shall require compliance with all the functional require- ments for new construction in the California Building Code, including requirements in Sections 1224, 1225, 1226, 1227 and 1228.
Exception [OSHPD 1R] : Hospital buildings removed from acute care service adapted for re-use as skilled nursing facilities, acute psychiatric hospitals or out-patient services of a hospital may be permitted to meet the minimum room clearances, areas and dimensions of the 2001 California Building Code for existing rooms re-used for a similar purpose, subject to the approval of OSHPD.
506.2 Certificate of occupancy. A certificate of occupancy shall be issued where it has been determined that the requirements for the new occupancy classification have been met.
506.3 Stairways. An existing stairway shall not be required to comply with the requirements of Section 1011 of the California Build- ing Code where the existing space and construction does not allow a reduction in pitch or slope.
506.4 Existing emergency escape and rescue openings. Where a change of occupancy would require an emergency escape and rescue opening in accordance with Section 1031.1 of the California Building Code, operable windows serving as the emergency escape and rescue opening shall comply with the following:
- An existing operable window shall provide a minimum net clear opening of 4 square feet (0.38 m [2] ) with a minimum net clear opening height of 22 inches (559 mm) and a minimum net clear opening width of 20 inches (508 mm).
- A replacement window where such window complies with both of the following: 2.1. The replacement window meets the size requirements in Item 1. 2.2. The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be permitted to be of the same operating style as the existing window or a style that provides for an equal or greater window opening area than the existing window.
[BS] 506.5 Structural. Any building undergoing a change of occupancy shall satisfy the requirements of this section.
CEBC § 1.10.1 High relevance — show source text
Chapter 5A Prescriptive Compliance Method.
Chapter 5A provides details for the prescriptive compliance method for alteration, addition and change of occupancy of existing build- ings and structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).
Chapter 6 Classification of Work.
Chapter 6 provides an overview of the Work Area Method and defines the different classifications of work including alterations, change of occupancy, additions and historic buildings. Detailed requirements for all of these are given in subsequent Chapters 7 through 11.
Chapter 7 Alterations—Level 1.
Chapter 7 provides the technical requirements for those existing buildings that undergo Level 1 alterations as described in Section 602, which includes replacement or covering of existing materials, elements, equipment or fixtures using new materials for the same purpose. This chapter is distinguished from Chapters 8 and 9 by only involving replacement of building components with new components with no reconfiguration of space.
Chapter 8 Alterations—Level 2.
A Level 2 alteration is an alteration involving space reconfiguration that could be up to and including 50 percent of the area of the building or addition of a new building system. Level 2 alterations also include the extension or addition of any system or equipment. The purpose of Chapter 8 is to provide detailed requirements and provisions to identify the required improvements in the existing building elements, means of egress, fire protection, structural systems, energy efficiency, and other building systems include electrical, mechanical and plumbing when a building is being altered.
Chapter 9 Alterations—Level 3.
Chapter 9 provides the technical requirements for those existing buildings that undergo Level 3 alterations. Level 3 alterations are those involving alterations that cover 50 percent of the aggregate area of the building. Under certain situations, this chapter also intends to improve the safety of certain building features beyond the work area and in other parts of the building where no alteration work might be taking place.
Chapter 10 Change of Occupancy.
The purpose of Chapter 10 is to address existing buildings that are subject to a change of occupancy. This chapter is an assembly of requirements to upgrade safety without having to comply fully as a new building. A change of occupancy classification is considered a change of occupancy, however, it will involve a higher level of regulation since the use of the building has made a more significant change.
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Chapter 11 Additions.
Chapter 11 provides the requirements for additions, which are considered new construction. The requirements focus on safely integrating the addition with the existing building. This includes issues such as limiting the overall height and area of the building where the addition is not separated by a fire wall.
Chapter 12 Historic Buildings —Reserved
Chapter 12 is not adopted by the State of California. Historic buildings and structures shall comply with Part 8, Title 24, California Code of Regulations.
Chapter 13 Performance Compliance Methods.
Chapter 13 allows for existing buildings to be evaluated to show that alterations or a change of occupancy, while not meeting new construction requirements, will provide a level of safety to demonstrate compliance. Provisions are based on a numerical scoring system involving 21 safety parameters where, when evaluated, such buildings must meet a minimum overall safety score.
CEBC § 1.10.1 High relevance — show source text
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Chapter 3 Provisions for All Compliance Methods.
Chapter 3 guides the use of the three compliance methods of the CEBC and provides requirements that apply globally. The globally applicable requirement include general requirements related to buildings materials and other applicable codes, storm shelters, structural loads, in-situ load tests, accessibility, smoke alarms, carbon monoxide detection and exterior wall coverings.
Chapter 3A Provisions for All Compliance Methods.
Chapter 3A controls the compliance options for alteration, repair, addition, evaluation and change of occupancy of existing structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).
Chapter 4 Repairs.
Chapter 4, a chapter independent of the three compliance methods, governs the repair of existing buildings. The provisions define conditions under which repairs may be made using materials and methods like those of the original construction or the extent to which repairs must comply with requirements for new buildings.
Chapter 4A Repairs.
Chapter 4A governs the repair of existing buildings regulated by the Department of Health Care Access and Information/Office of State- wide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).
Chapter 5 Prescriptive Compliance Method.
Chapter 5 provides one of the three main options of compliance available in the CEBC for buildings and structures undergoing alteration, addition or change of occupancy. The base requirements are more administrative in nature. The structural triggers for upgrades are consistent with the Work Area Method.
Chapter 5A Prescriptive Compliance Method.
Chapter 5A provides details for the prescriptive compliance method for alteration, addition and change of occupancy of existing build- ings and structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).
Chapter 6 Classification of Work.
Chapter 6 provides an overview of the Work Area Method and defines the different classifications of work including alterations, change of occupancy, additions and historic buildings. Detailed requirements for all of these are given in subsequent Chapters 7 through 11.
Chapter 7 Alterations—Level 1.
Chapter 7 provides the technical requirements for those existing buildings that undergo Level 1 alterations as described in Section 602, which includes replacement or covering of existing materials, elements, equipment or fixtures using new materials for the same purpose. This chapter is distinguished from Chapters 8 and 9 by only involving replacement of building components with new components with no reconfiguration of space.
Chapter 8 Alterations—Level 2.
A Level 2 alteration is an alteration involving space reconfiguration that could be up to and including 50 percent of the area of the building or addition of a new building system. Level 2 alterations also include the extension or addition of any system or equipment. The purpose of Chapter 8 is to provide detailed requirements and provisions to identify the required improvements in the existing building elements, means of egress, fire protection, structural systems, energy efficiency, and other building systems include electrical, mechanical and plumbing when a building is being altered.
Chapter 9 Alterations—Level 3.
CEBC § 422.3 High relevance — show source text
503 A .16 Reserved.
503 A .17 Ambulatory care facilities. Where a work area exceeds 50 percent of the building area and the work area includes an existing ambulatory care facility, the following shall be provided:
- A smoke compartment in accordance with Section 422.3 of the California Building Code where the alteration results in an ambulatory care facility greater than 10,000 square feet on one story.
- Separation from adjacent spaces in accordance with Section 422.2 of the California Building Code, where any such facility has the potential for four or more care recipients are to be incapable of self-preservation at any time.
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PRESCRIPTIVE COMPLIANCE METHOD
503 A .18 Reserved.
503 A .19 Reserved.
503 A .20 Two-way communications systems. Where the work area for alterations exceeds 50 percent of the building area and the building has elevator service, a two-way communication systems shall be provided where required by Section 1009.8 of the Califor- nia Building Code.
SECTION 504 A
RESERVED
SECTION 505 A
RESERVED
SECTION 506 A —CHANGE OF OCCUPANCY
506 A .1 Compliance. A change of occupancy shall not be made in any building unless that building is made to comply with the requirements of the California Building Code for the use or occupancy. Changes of occupancy in a building or portion thereof shall be such that the existing building is not less complying with the provisions of this code than the existing building or structure was prior to the change. Subject to the approval of the building official, changes of occupancy shall be permitted without complying with all of the requirements of this code for the new occupancy, provided that the new occupancy is less hazardous, based on life and fire risk, than the existing occupancy.
Exception: The building need not be made to comply with Chapter 16 A of the California Building Code unless required by Section 506 A .5.
506 A .1.1 Change in function . A change in function shall require compliance with all the functional requirements for new construc- tion in the California Building Code, including requirements in California Building Code Section 1224. Compliance shall be only as necessary to meet the specific provisions and is not intended to require the entire building be brought into compliance.
Exception: Minimum room clearances, areas and dimensions may meet the requirements of the 2001 California Building Code for existing rooms re-used for a similar purpose, subject to the approval of OSHPD.
506 A .2 Certificate of occupancy. A certificate of occupancy shall be issued where it has been determined that the requirements for the new occupancy classification have been met.
506 A .3 Stairways. An existing stairway shall not be required to comply with the requirements of Section 1011 of the California Build- ing Code where the existing space and construction does not allow a reduction in pitch or slope.
CEBC § 1001.1 High relevance — show source text
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10 CHANGE OF OCCUPANCY
User notes:
About this chapter : The purpose of this chapter is to provide regulations for the circumstances where an existing building is subject to a change of occupancy or a change of occupancy classification. A change of occupancy is not to be confused with a change of occupancy classification. The California Building Code defines different occupancy classifications in Chapter 3 and special occupancy requirements in Chapter 4. Within specific occupancy classifications there can be many different types of actual activities that can take place. For instance, a Group A-3 occupancy classification deals with a wide variation of different types of activities, including bowling alleys and courtrooms, indoor tennis courts and dance halls. When a facility changes use from, for example, a bowling alley to a dance hall, the occupancy classification remains A-3, but the different uses could lead to drastically different code requirements. Therefore, this chapter deals with the special circumstances that are associated with a change in the use of a building within the same occupancy classification as well as a change of occupancy classification.
SECTION 1001—GENERAL
1001.1 Scope. The provisions of this chapter shalle a change of occupancy occurs, as defined in Section 202.
1001.2 Certificate of occupancy. A change of occupancy or a change of occupancy within a space where there is a different fire protection system threshold requirement in Chapter 9 of th apply where current California Building Code than exists in the current building or space shall not be made to any structure without the approval of the code official. A certificate of occupancy shall be issued where it has been determined that the requirements for the change of occupancy have been met.
1001.2.1 Change of use. Any work undertaken in connection with a change in use shall conform to the applicable requirements for the work as classified in Chapter 6 and to the requirements of Sections 1002 through 1010.
1001.2.2 Change of occupancy classification. Where a building undergoes a change of occupancy classification, the provisions of Sections 1002 through 1011 shall apply.
1001.2.2.1 Partial change of occupancy. Where a portion of an existing building undergoes a change of occupancy classification, Section 1011 shall apply.
1001.3 Certificate of occupancy required. A certificate of occupancy shall be issued where a change of occupancy occurs that results in a different occupancy classification as determined by the California Building Code .
SECTION 1002—SPECIAL USE AND OCCUPANCY
1002.1 Compliance with the building code. Where an existing building or part of an existing building undergoes a change of occupancy to one of the special use or occupancy categories as described in Chapter 4 in the California Building Code, the building shall comply with all of the requirements of Chapter 4 of the California Building Code applicable to the special use or occupancy.
1002.2 Incidental uses. Where a portion of a building undergoes a change of occupancy to one of the incidental uses listed in Table 509.1 of the California Building Code, the incidental use shall comply with Section 509 of the California Building Code applicable to the incidental use.
SECTION 1003—BUILDING ELEMENTS AND MATERIALS
1003.1 General. Building elements and materials in portions of buildings undergoing a change of occupancy classification shall comply with Section 1011.
SECTION 1004—FIRE PROTECTION
CEBC § 10-5 High relevance — show source text
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CHANGE OF OCCUPANCY
1011.5 Means of egress, general. Hazard categories in regard to life safety and means of egress shall be in accordance with Table 1011.5.
TABLE 1011.5—MEANS OF EGRESS HAZARD CATEGORIES Col2 RELATIVE HAZARD OCCUPANCY CLASSIFICATIONS 1 (Highest Hazard) H (Not Allowed) 2 I-2; I-3; I-4_(Not Allowed)_ 3 A; E; M; R-1; R-2; R-4 4 B; F-1; R-3; R-4, S-1 5 (Lowest Hazard) F-2; S-2; U 1011.5.1 Means of egress for change to a higher-hazard category. Where a change of occupancy classification is made to a higher-hazard category (lower number) as shown in Table 1011.5, the means of egress shall comply with the requirements of Chapter 10 of the California Building Code .
Exceptions:
Stairways shall be enclosed in compliance with the applicable provisions of Section 903.1.
Existing stairways including handrails and guards complying with the requirements of Chapter 9 shall be permitted for continued use subject to approval of the code official.
Any stairway replacing an existing stairway within a space where the pitch or slope cannot be reduced because of existing construction shall not be required to comply with the maximum riser height and minimum tread depth requirements.
Existing corridor walls constructed on both sides of wood lath and plaster in good condition or [1] / 2 -inch-thick (12.7 mm) gypsum wallboard shall be permitted. Such walls shall either terminate at the underside of a ceiling of equivalent construction or extend to the underside of the floor or roof next above.
Existing corridor doorways, transoms and other corridor openings shall comply with the requirements in Sections 804.7.1, 804.7.2 and 804.7.3.
Existing dead-end corridors shall comply with the requirements in Section 804.8.
An operable window complying with Section 1011.5.6 shall be accepted as an emergency escape and rescue opening.
In Group R-2.1 and I-2 facilities, required guards enclosing the occupiable roof areas shall be permitted to be greater than 48 inches (1219 mm) above the surface of the occupiable roof where the occupants, because of clinical needs, require restraint or containment as part of a function of a psychiatric or cognitive treatment area.
1011.5.2 Means of egress for change of use to an equal or lower-hazard category. Where a change of occupancy classification is made to an equal or lesser-hazard category (higher number) as shown in Table 1011.5, existing elements of the means of egress shall comply with the requirements of Section 905 for the new occupancy classification. Newly constructed or configured means of egress shall comply with the requirements of Chapter 10 of the California Building Code .
Exceptions:
CEBC § 102.1 High relevance — show source text
SECTION 102—APPLICABILITY
[A] 102.1 Construction and design provisions. The construction and design provisions of this code shall apply to:
- Structures, facilities and conditions arising after the adoption of this code.
- Existing structures, facilities and conditions not legally in existence at the time of adoption of this code.
- Existing structures, facilities and conditions where required in Chapter 11.
- Existing structures, facilities and conditions that, in the opinion of the fire code official, constitute a distinct hazard to life or property.
[A] 102.2 Administrative, operational and maintenance provisions. The administrative, operational and maintenance provisions of this code shall apply to:
- Conditions and operations arising after the adoption of this code.
- Existing conditions and operations.
[A] 102.3 Change of use or occupancy. A change of occupancy shall not be made unless the use or occupancy is made to comply with the requirements of this code and the California Existing Building Code .
Exception: Where approved by the fire code official, a change of occupancy shall be permitted without complying with the requirements of this code and the California Existing Building Code, provided that the new or proposed use or occupancy is less hazardous, based on life and fire risk, than the existing use or occupancy.
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DIVISION II—SCOPE AND ADMINISTRATION
[A] 102.4 Application of building code. The design and construction of new structures shall comply with the California Building Code, and any alterations, additions, changes in use or changes in structures required by this code, which are within the scope of the California Building Code, shall be made in accordance therewith.
[A] 102.5 Application of residential code. Where structures are designed and constructed in accordance with the California Residen- tial Code, the provisions of this code shall apply as follows:
- Construction and design provisions of this code pertaining to the exterior of the structure shall apply including, but not limited to, premises identification, fire apparatus access and water supplies. Where interior or exterior systems or devices are installed, construction permits required by Section 105.6 shall apply.
- Administrative, operational and maintenance provisions of this code shall apply.
[A] 102.6 Historic buildings. The provisions of this code relating to the construction, alteration, repair, enlargement, restoration, relocation or moving of buildings or structures shall not be mandatory for existing buildings or structures identified and classified by the state or local jurisdiction as historic buildings where such buildings or structures do not constitute a distinct hazard to life or property. Fire protection in designated historic buildings shall be provided with an approved fire protection plan as required in Section 1103.1.1.
[A] 102.7 Referenced codes and standards. The codes and standards referenced in this code shall be those that are listed in Chapter 80, and such codes and standards shall be considered to be part of the requirements of this code to the prescribed extent of each such reference and as further regulated by Sections 102.7.1 and 102.7.2.
[A] 102.7.1 Conflicts. Where conflicts occur between provisions of this code and referenced codes and standards, the provisions of this code shall apply.
CEBC § 1.8.7.3 Medium relevance — show source text
3. The local building department may require tests performed by an approved testing agency at the expense of the owner or owner’s agent as proof of compliance.
4. If the proposed alternate is related to accessi bil- ity in covered multifamily dwellings or facilities serving covered multifamily dwellings, as defined in Chapter 2 of the California Building Code, the proposed alternate must also meet the threshold set for equivalent facilitation as defined in Chapter 2 of the California Building Code.
For additional information regarding approval of alternates by a local building department pur- suant to the State Housing Law, see California Health and Safety Code Section 17951(e) and Cali- fornia Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1.
1.8.7.3 Department of Housing and Community Devel- opment. The Department of Housing and Community Development may approve alternates for use in the erec- tion, construction, reconstruction, movement, enlarge- ment, conversion, alteration, repair, removal, or demolition of apartments, condominiums, hotels, motels, lodging houses, dwellings, or accessory structures thereto, and permanent buildings in mobilehome parks and special occupancy parks. The consideration and approval of alternates shall comply with the following:
1. The department may require tests at the expense of the owner or owner’s agent to substantiate compli- ance with the California Building Standards Code.
2. The approved alternate shall, for its intended pur- pose, be at least equivalent in performance and safety to the materials, designs, tests, or methods of construction prescribed by this code.
1.8.8 Appeals Board.
1.8.8.1 General. Every city, county, or city and county shall establish a process to hear and decide appeals of orders, decisions, and determinations made by the enforc- ing agency relative to the application and interpretation of this code and other regulations governing construction use, maintenance and change of occupancy. The govern- ing body of any city, county, or city and county may estab- lish a local appeals board and a housing appeals board to serve this purpose. Members of the appeals board(s) shall not be employees of the enforcing agency and shall be knowledgeable in the applicable building codes, reg- ulations and ordinances as determined by the governing body of the city, county, or city and county.
Where no such appeals boards or agencies have been established, the governing body of the city, county, or city and county shall serve as the local appeals board or housing appeals board as specified in California Health and Safety Code Sections 17920.5 and 17920.6.
1.8.8.2 Definitions. The following terms shall for the purposes of this section have the meaning shown.
CEBC § 0.33 Medium relevance — show source text
Exceptions:
- Where the area of the new occupancy is less than 10 percent of the building area, the occupancy is not changing from a Group S or Group U occupancy, and the new occupancy is not assigned to Risk Category IV, compliance with this section is not required. The cumulative effect of occupancy changes over time shall be considered.
- Where a change of use results in a building being reclassified from Risk Category I or II to Risk Category III and the seismic coefficient, S DS, is less than 0.33, compliance with this section is not required.
- Unreinforced masonry bearing wall buildings assigned to Risk Category III and to Seismic Design Category A or B, shall be permitted to use Appendix Chapter A1 of this code.
- Where the change is from a Group S or Group U occupancy and there is no change of risk category, compliance with Section 304.3.2 shall be permitted.
[BS] 506.5.4 Access to Risk Category IV. Any structure that provides operational access to an adjacent structure assigned to Risk Category IV as the result of a change of occupancy shall itself comply with Sections 1608 and 1609 of the California Building Code and Section 304.3.1 of this code. Where operational access to the Risk Category IV structure is less than 10 feet (3048 mm) from either an interior lot line or from another structure, access protection from potential falling debris shall be provided.
506.6 Enhanced classroom acoustics. In Group E occupancies, where the work area exceeds 50 percent of the building area, enhanced classroom acoustics shall be provided in all classrooms with a volume of 20,000 cubic feet (565 m [3] ) or less. Enhanced classroom acoustics shall comply with the reverberation time in Section 808 of ICC A117.1.
SECTION 507—HISTORIC BUILDINGS
507.1 Historic buildings. The provisions of the California Historical Building Code (Part 8, Title 24, C.C.R), shall apply to qualified historical buildings or properties.
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
CHAPTER 5A – PRESCRIPTIVE COMPLIANCE METHOD [OSHPD 1]
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
CEBC § 1.11. Medium relevance — show source text
The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
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13 PERFORMANCE COMPLIANCE METHODS
Not adopted by the State of California (May be available for adoption by local ordinance. See Section 1.1.11.) (See Section 104.11 for consideration of alternative means of compliance.)
User notes:
About this chapter: Chapter 13 allows for existing buildings to be evaluated so as to show that alterations, while not meeting new construction requirements, will improve the current existing situation. Provisions are based on a numerical scoring system involving 21 various safety parameters and the degree of code compliance for each issue.
SECTION 1301—GENERAL
1301.1 Scope. The provisions of this chapter shall apply to the alteration, addition and change of occupancy of existing structures, including historic structures, as referenced in Section 301.3.3. The provisions of this chapter are intended to maintain or increase the current degree of public safety, health and general welfare in existing buildings while permitting, alteration, addition and change of occupancy without requiring full compliance with Chapters 6 through 12, except where compliance with the prescriptive method of Chapter 5 or the work area method of other provisions of this code is specifically required in this chapter.
1301.1.1 Compliance with other methods. Alterations, additions and changes of occupancy to existing structures shall comply with the provisions of this chapter or with one of the methods provided in Section 301.3.
SECTION 1302—APPLICABILITY
1302.1 General. Existing buildings in which there is work involving additions, alterations or changes of occupancy shall be made to conform to the requirements of this chapter or the provisions of Chapters 6 through 12. The provisions of Sections 1302.1.1 through 1302.1.6 shall apply to existing occupancies that will continue to be, or are proposed to be, in Groups A, B, E, F, I-2, M, R and S. These provisions shall also apply to Group U occupancies where such occupancies are undergoing a change of occupancy or a partial change in occupancy with separations in accordance with Section 1302.1.2. These provisions shall not apply to buildings with occupancies in Group H, I-1, I-3 or I-4.
1302.1.1 Change in occupancy. Where an existing building is changed to a new occupancy classification and this section is applicable, the provisions of this section for the new occupancy shall be used to determine compliance with this code.
1302.1.2 Partial change in occupancy. Where a portion of the building is changed to a new occupancy classification and that portion is separated from the remainder of the building with fire barrier or horizontal assemblies having a fire-resistance rating as required by Table 508.4 of the International Building Code or Section R302 of the International Residential Code for the separate occupancies, or with approved compliance alternatives, the portion changed shall be made to conform to the provisions of this section. Only the portion separated shall be required to be evaluated for compliance.
CEBC § 1-11 Medium relevance — show source text
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ADMINISTRATION
3. The local building department may require tests performed by an approved testing agency at the expense of the owner or owner’s agent as proof of compliance. 4. If the proposed alternate is related to accessibility in covered multifamily dwellings or in facilities serving covered multifam- ily dwellings as defined in Chapter 2, the proposed alternate must also meet the threshold set for equivalent facilitation as defined in Chapter 2.
For additional information regarding approval of alternates by a building department pursuant to the State Housing Law, see Cali- fornia Health and Safety Code Section 17951(e) and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1.
1.8.7.3 Department of Housing and Community Development. The Department of Housing and Community Development may approve alternates for use in the erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal or demolition of apartments, condominiums, hotels, motels, lodging houses, dwellings or an accessory thereto and permanent buildings in mobilehome parks and special occupancy parks. The consideration and approval of alternates shall comply with the following: 1. The department may require tests at the expense of the owner or owner’s agent to substantiate compliance with the California Building Standards Code. 2. The approved alternate shall, for its intended purpose, be at least equivalent in performance and safety to the materials, designs, tests or methods of construction prescribed by this code.
SECTION 1.8.8—APPEALS BOARD
1.8.8.1 General. Every city, county, or city and county shall establish a process to hear and decide appeals of orders, decisions and determinations made by the enforcing agency relative to the application and interpretation of this code and other regulations governing construction, use, maintenance and change of occupancy. The governing body of any city, county, or city and county may establish a local appeals board and a housing appeals board to serve this purpose. Members of the appeals board(s) shall not be employees of the enforcing agency and shall be knowledgeable in the applicable building codes, regulations and ordinances as determined by the governing body of the city, county, or city and county.
Where no such appeals boards or agencies have been established, the governing body of the city, county, or city and county shall serve as the local appeals board or housing appeals board as specified in California Health and Safety Code Sections 17920.5 and 17920.6.
1.8.8.2 Definitions. The following terms shall for the purposes of this section have the meaning shown.
HOUSING APPEALS BOARD. The board or agency of a city, county, or city and county which is authorized by the governing body of the city, county, or city and county to hear appeals regarding the requirements of the city, county, or city and county relating to the use, maintenance and change of occupancy of buildings and structures, including requirements governing alteration, additions, repair, demolition and moving. In any area in which there is no such board or agency, “Housing appeals board” means the local appeals board having jurisdiction over the area.
Frequently asked questions
When exactly is a certificate of occupancy required for a change?
A certificate of occupancy is required when the change of occupancy results in a different occupancy classification as determined by the California Building Code, per § 1001.3.
If the occupancy classification doesn't change but the use changes (e.g., bowling alley → dance hall), does CEBC apply?
Yes. A change of use within the same occupancy classification can still trigger Chapter 10 requirements (see § 1001.2.1 and related guidance in Chapter 10) and applicable Sections 1002–1010 must be checked.
Can a less-hazardous new occupancy avoid upgrades?
Potentially — the code and the Fire Code allow the code official to permit changes without complying with all new-occupancy requirements when the new occupancy is less hazardous, but this requires official approval; it is not automatic.
Does a small tenant change ever avoid structural or seismic requirements?
There are explicit CEBC exceptions that may exempt some structural/seismic upgrades when the area of the new occupancy is less than 10 percent of the building area, but the exception conditions and cumulative effects must be evaluated against the code language and approved by the authority having jurisdiction.
Who decides which parts of the CEBC apply to my change of occupancy?
The code official (local building department or enforcing agency) determines applicability and whether exceptions or reduced scopes are acceptable; many CEBC provisions are subject to the official’s approval.
More in California Existing Building Code
- Administration and Definitions (Scope, enforcement, code official duties, definitions)
- Provisions for All Compliance Methods (general requirements that apply to all compliance options; Chapter 3 / 3A)
- Seismic retrofit and evaluation (Appendix A and seismic provisions/sections for evaluation and retrofit)
- Referenced Standards and Appendices (Chapter 16 and Appendices A–E, Resource A)
- Repairs (Chapter 4 — repair-specific rules for materials, means of egress, structural, MEP, etc.)
- Alterations — Level 1, Level 2, Level 3 (technical requirements for each alteration level; Chapters 7–9)
- Change of Occupancy and Additions (requirements for occupancy changes and additions; Chapters 10–11)
- Compliance Methods — Prescriptive, Work Area, Performance (Chapters 5, 6–11, 13)
- Relocated Buildings (requirements for buildings moved or relocated; Chapter 14)
- Construction Safeguards (site safety, means of egress and life-safety during construction; Chapter 15)
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