CEBC · California Existing Building Code
What egress upgrades apply when occupancy changes?
If your building or space changes occupancy and that new use is a higher hazard under Table 1011.5, the CEBC requires you to upgrade the means of egress to meet California Building Code Chapter 10 rules; ensure egress capacity matches the new occupant load and check the CEBC exceptions and code‑official approvals.
Last reviewed: July 6, 2026
What the code requires — plain English
When a space or building undergoes an occupancy change, the existing means of egress must be evaluated under the CEBC. Specifically, means of egress in portions of buildings undergoing a change of occupancy classification must comply with Section 1011 (this requirement is referenced by § 1005.1). If the change is to a higher‑hazard category (a lower hazard number in Table 1011.5), the means of egress must be brought into compliance with the full requirements of Chapter 10 of the California Building Code. See § 1005.1 and § 1011.5.1 for the controlling rules.
The single most important rule: if your occupancy change moves the space into a higher‑hazard category in Table 1011.5, you must make the means of egress comply with CBC Chapter 10 (CEBC § 1011.5.1).
Requirements in detail
Key definitions and first references
- Means of egress — required exit routes, stairs, doors, corridors and related components; evaluation triggered by change of occupancy (see § 1005.1).
- Higher‑hazard category — a change to an occupancy whose hazard number in Table 1011.5 is lower (e.g., moving from category 5 → category 3). The hazard mapping is in Table 1011.5.
At‑a‑glance decision table
| Decision dimension | What triggers an upgrade? | Required action | Code Reference |
|---|---|---|---|
| Does the change move to a lower hazard number (higher hazard)? | Change of occupancy to a hazard category that is numerically lower in Table 1011.5 (e.g., from 5 → 3) | Means of egress shall comply with Chapter 10 of the California Building Code (i.e., upgrade egress to CBC Chapter 10 requirements) | § 1011.5.1 |
| Does the change move to an equal or lesser hazard? | Change to same or higher numbered hazard category in Table 1011.5 (e.g., 3 → 4 or 3 → 5) | Existing means of egress elements shall comply with Section 905 for the new occupancy; newly built/ reconfigured egress must meet CBC Chapter 10 | § 1011.5.2 |
| General trigger for review | Any portion of a building undergoing a change of occupancy classification | Means of egress in that portion must comply with Section 1011 (CEBC) — CEBC requires applying 1011 rules to egress for changes | § 1005.1 |
| Egress capacity sizing | When occupancy changes (regardless of other upgrades) | Egress capacity must meet or exceed the occupant load specified in the CBC for the new occupancy | § 1011.5.3 |
What “comply with Chapter 10” means (scope, not a verbatim checklist)
- If the CEBC requires compliance with CBC Chapter 10 for a change to a higher‑hazard category, that means the space must satisfy the applicable Chapter 10 means‑of‑egress provisions (number of exits, exit configuration, exit access travel distance, door and stair requirements, etc.). The CEBC directs you to CBC Chapter 10 via § 1011.5.1 — the CEBC text itself does not reproduce every Chapter 10 table; consult CBC Chapter 10 for the technical sizing and number rules.
Exceptions & special cases
- Existing stairways, handrails and guards that already comply with Chapter 9 are permitted to remain in use, subject to the code official’s approval (Exception 2 to § 1011.5.1).
- Some specific construction tolerances apply for replacement stairs where pitch/slope cannot be reduced — riser/tread strict compliance may be waived in that narrow circumstance (Exception 3 to § 1011.5.1).
- Operable windows that meet minimum clear opening sizes can be accepted as emergency escape and rescue openings where required (see § 1011.5.6 for sizes).
- The CEBC also includes exceptions for corridors, existing corridor finishes and dead‑end corridors; see the listed exceptions in § 1011.5.1. Do not assume every existing feature must be rebuilt — many existing conditions may be accepted per the exceptions, but subject to the code official’s review.
Common mistakes
- Misreading Table 1011.5 direction: a lower number = higher hazard. People sometimes think “higher number = higher hazard” — that is reversed for Table 1011.5. Always check the table when comparing old vs new classification. Table 1011.5 shows hazard ranking with 1 = highest hazard.
- Assuming no upgrades are needed just because exits exist. Even if exits are present, a change to a higher‑hazard category requires compliance with CBC Chapter 10 unless the CEBC exceptions apply. See § 1011.5.1.
- Forgetting to verify egress capacity vs. new occupant load. The CEBC explicitly requires the egress capacity meet or exceed the occupant load for the new occupancy (§ 1011.5.3). Do not overlook recalculating occupant load under CBC rules.
- Relying on informal judgements instead of getting the code official’s approval where the CEBC permits continued use of existing stair components (exceptions require official approval). See Exception 2 to § 1011.5.1.
Worked example — applying the rule (process, not invented numbers)
Scenario: A warehouse classified as Group S‑2 is proposed to be converted to a small restaurant classified as Group A (assembly).
- Determine hazard categories from Table 1011.5: S‑2 appears under hazard 5 (lowest hazard) and A appears under hazard 3. Because 3 is a lower number than 5, this is a change to a higher‑hazard category. (See Table 1011.5.)
- Because the change is to a higher‑hazard category, the means of egress must comply with CBC Chapter 10 per § 1011.5.1 (CEBC directs you to upgrade egress to Chapter 10 requirements).
- Next steps the designer must take (per CEBC direction and related CEBC sections):
- Compute the new occupant load using CBC Chapter 10 occupant load rules (CEBC refers egress sizing back to CBC rules). Then ensure egress capacity meets or exceeds that occupant load as required by § 1011.5.3.
- Apply CBC Chapter 10 for specifics: required number of exits, minimum exit widths, travel distances, door hardware, stair enclosure, etc., because CEBC § 1011.5.1 requires Chapter 10 compliance for higher hazard changes. If the existing stair or other egress components already comply with Chapter 9, they may be allowed to remain, but you must obtain approval where the CEBC exception allows it.
Important note: the CEBC tells you which parts of the code to follow and when (e.g., Chapter 10), but the precise occupant‑load factors, exit width per occupant, and travel‑distance limits are detailed in the California Building Code (CBC Chapter 10). Consult CBC Chapter 10 for the numeric calculations referenced above. The CEBC references those requirements but does not restate each numeric table in full.
Related provisions (CEBC sections you should read)
- § 1005.1 — General rule: means of egress in portions undergoing change of occupancy shall comply with Section 1011.
- § 1011.5.1 — Means of egress for change to a higher‑hazard category (primary upgrade trigger).
- Table 1011.5 — Hazard categories by occupancy classification (use this to compare old vs new hazard).
- § 1011.5.2 — Means of egress when changing to equal or lesser hazard (existing elements must comply with Section 905).
- § 1011.5.3 — Egress capacity must meet or exceed the occupant load for the new occupancy.
- § 1011.2.1 — Fire protection (automatic sprinkler) requirements triggered by change of occupancy (sprinklers may also affect egress exceptions).
- § 1001.2 / § 1001.3 — Certificate of occupancy and general applicability of the change‑of‑occupancy chapter.
Code references
Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:
CEBC § 1004.1 High relevance — show source text
SECTION 1004—FIRE PROTECTION
1004.1 General. Fire protection requirements in Section 1011 shall apply where either of the following occur:
- A building or portion thereof undergoes a change of occupancy.
- A building or portion thereof undergoes a change of occupancy and there is a different fire protection system threshold requirement in Chapter 9 of the current California Building Code than exists in the current building or portion thereof.
SECTION 1005—MEANS OF EGRESS
1005.1 General. Means of egress in portions of buildings undergoing a change of occupancy classification shall comply with Section 1011.
SECTION 1006—STRUCTURAL
[BS] 1006.1 Live loads. Structural elements carrying tributary live loads from an area with a change of occupancy shall satisfy the requirements of Section 1607 of the California Building Code . Design live loads for areas of new occupancy shall be based on Section 1607 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.
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[BS] 1006.2 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 and 1609 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. The cumulative effect of occupancy changes over time shall be considered.
[BS] 1006.3 Seismic loads. Where a change of occupancy results in a building being assigned to a higher risk category, or where the change is from a Group S or Group U occupancy to any occupancy other than Group S or Group U, the lateral force-resisting system of the building shall comply with Section 304.3.1 for the new risk category. Where a change of occupancy results in a building being assigned to Risk Category IV and Seismic Design Category D or F, nonstructural components serving any portion of the building changed to Risk Category IV shall comply with the requirements of Section 1613 of the California Building Code or shall comply with ASCE 41 using an objective of operational nonstructural performance with the BSE-1N earthquake hazard level.
Exceptions:
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.
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.
Reserved.
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.
CEBC § 10-5 High relevance — show source text
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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 § 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 § 1001.2.1 High relevance — show source text
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
1004.1 General. Fire protection requirements in Section 1011 shall apply where either of the following occur:
- A building or portion thereof undergoes a change of occupancy.
- A building or portion thereof undergoes a change of occupancy and there is a different fire protection system threshold requirement in Chapter 9 of the current California Building Code than exists in the current building or portion thereof.
SECTION 1005—MEANS OF EGRESS
1005.1 General. Means of egress in portions of buildings undergoing a change of occupancy classification shall comply with Section 1011.
SECTION 1006—STRUCTURAL
[BS] 1006.1 Live loads. Structural elements carrying tributary live loads from an area with a change of occupancy shall satisfy the requirements of Section 1607 of the California Building Code . Design live loads for areas of new occupancy shall be based on Section 1607 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.
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[BS] 1006.2 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 and 1609 of the California Building Code for the new risk category.
CEBC § 10-5 High relevance — show source text
1002 Maintenance and Plans . . . . . . . . . . . . . . . . . . . . . . . . 10-5
1003 General Means of Egress . . . . . . . . . . . . . . . . . . . . . . . 10-5
1004 Occupant Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
1005 Means of Egress Sizing. . . . . . . . . . . . . . . . . . . . . . . . . 10-9
1006 Number of Exits and Exit Access Doorways . . . . . 10-10
1007 Exit and Exit Access Doorway Configuration . . . . 10-14
1008 Means of Egress Illumination . . . . . . . . . . . . . . . . . . 10-14
1009 Accessible Means of Egress. . . . . . . . . . . . . . . . . . . . 10-15
1010 Doors, Gates and Turnstiles . . . . . . . . . . . . . . . . . . . 10-19
1011 Stairways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29
1012 Ramps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33
1013 Exit Signs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34
1014 Handrails. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-36
1015 Guards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-37
1016 Exit Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-39
1017 Exit Access Travel Distance. . . . . . . . . . . . . . . . . . . . 10-40
1018 Aisles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-41
1019 Exit Access Stairways and Ramps . . . . . . . . . . . . . . 10-42
1020 Corridors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-42
1021 Egress Balconies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-44
1022 Exits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-44
CEBC § 1009.3 High relevance — show source text
1009.3 Interceptor required. If the new occupancy will produce grease or oil-laden wastes, interceptors shall be provided as required in the California Plumbing Code .
1009.4 Chemical wastes. If the new occupancy will produce chemical wastes, the following shall apply:
- If the existing piping is not compatible with the chemical waste, the waste shall be neutralized prior to entering the drainage system or the piping shall be changed to a compatible material.
- Chemical waste shall not discharge to a public sewer system without the approval of the sewage authority.
SECTION 1010—OTHER REQUIREMENTS
1010.1 Light and ventilation. Light and ventilation shall comply with the requirements of the California Building Code for the new
occupancy.
SECTION 1011—CHANGE OF OCCUPANCY CLASSIFICATION
1011.1 General. The provisions of this section shall apply to buildings or portions thereof undergoing a change of occupancy classification. This includes a change of occupancy classification within a group as well as a change of occupancy classification from one group to a different group. The provisions of this section shall also apply where there is a change of occupancy within a building or portion thereof and there is a different fire protection system threshold requirement in Chapter 9 of the current California Building Code than exists in the current building or space. Such buildings shall also comply with Sections 1002 through 1010 of this code.
1011.2 Fire protection systems. Fire protection systems shall be provided in accordance with Sections 1011.2.1 and 1011.2.2.
1011.2.1 Automatic sprinkler system. The installation of an automatic sprinkler system shall be required where there is a change of occupancy classification and Chapter 9 of the current California Building Code requires an automatic sprinkler system based on the new occupancy or where there is a change of occupancy within the space where there is a different fire protection system threshold requirement in Chapter 9 of the current California Building Code than exists in the current building or space . The installation of the automatic sprinkler system shall be required within the area of the change of occupancy and areas of the building not separated by a fire wall from the change of occupancy.
1011.2.1.1 Nonrequired automatic sprinkler systems. The code official is authorized to permit the removal of an existing automatic sprinkler system where all of the following conditions exist:
- The system is not required for new construction.
- Portions of the system that are exposed to the public are removed.
- The system was not installed as part of 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.
1011.2.1.1.1 Approval. Plans, investigation and evaluation reports, and other data shall be submitted documenting compliance with Section 1011.2.1.1 for review and approval in support of a determination authorizing the removal of the automatic sprinkler system by the code official.
1011.2.2 Fire alarm and detection system. Where a change in occupancy classification occurs or where there is a change of occupancy within a space where there is a different fire protection system threshold requirement in Chapter 9 of the current Cali- fornia Building Code than exists in the current building or space that requires a fire alarm and detection system to be provided based on the new occupancy, such system shall be in accordance with Chapter 11 and Section 907 of the California Fire Code.
CEBC § 2.1 High relevance — show source text
Exceptions:
- Any stairway replacing an existing stairway within a space where the pitch or slope cannot be reduced shall not be required to comply with the maximum riser height and minimum tread depth requirements.
- 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.
1011.5.3 Egress capacity. Egress capacity shall meet or exceed the occupant load as specified in the California Building Code for the new occupancy.
1011.5.4 Handrails. Existing stairways shall comply with the handrail requirements of Section 804.13.
1011.5.5 Guards. Existing guards shall comply with the requirements in Section 804.12.
1011.5.6 Existing emergency escape and rescue openings. Where a change of occupancy would require an emergency escape and rescue opening in accordance with Section 1031 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.
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1011.6 Heights and areas. Hazard categories in regard to height and area shall be in accordance with Table 1011.6.
TABLE 1011.6—HEIGHTS AND AREAS HAZARD CATEGORIES Col2 RELATIVE HAZARD OCCUPANCY CLASSIFICATIONS 1 (Highest Hazard) H 2 A-1; A-2; A-3; A-4; I; R-1; R-2; R-4, Condition 2 3 E; F-1; S-1; M 4 (Lowest Hazard) B; F-2; S-2; A-5; R-3; R-4, Condition 1; U 1011.6.1 Height and area for change to a higher-hazard category. Where a change of occupancy classification is made to a higher-hazard category as shown in Table 1011.6, heights and areas of buildings and structures shall comply with the requirements of Chapter 5 of the California Building Code for the new occupancy classification.
Exceptions:
- For high-rise buildings constructed in compliance with a previously issued permit, the type of construction reduction specified in Section 403.2.1 of the California Building Code is permitted. This shall include the reduction for columns.
CEBC § 1011.2.1.1 High relevance — show source text
1011.2.1.1 Nonrequired automatic sprinkler systems. The code official is authorized to permit the removal of an existing automatic sprinkler system where all of the following conditions exist:
- The system is not required for new construction.
- Portions of the system that are exposed to the public are removed.
- The system was not installed as part of 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.
1011.2.1.1.1 Approval. Plans, investigation and evaluation reports, and other data shall be submitted documenting compliance with Section 1011.2.1.1 for review and approval in support of a determination authorizing the removal of the automatic sprinkler system by the code official.
1011.2.2 Fire alarm and detection system. Where a change in occupancy classification occurs or where there is a change of occupancy within a space where there is a different fire protection system threshold requirement in Chapter 9 of the current Cali- fornia Building Code than exists in the current building or space that requires a fire alarm and detection system to be provided based on the new occupancy, such system shall be in accordance with Chapter 11 and Section 907 of the California Fire Code.
1011.3 Interior finish. In areas of the building undergoing the change of occupancy classification, the interior finish of walls and ceilings shall comply with the requirements of the California Building Code for the new occupancy classification.
1011.4 Enhanced classroom acoustics. In Group E occupancies, where the work area is a Level 3 alteration, 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.
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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.
CEBC § 9-3 High relevance — show source text
902 Special Use and Occupancy. . . . . . . . . . . . . . . . . . . . . . 9-3
903 Building Elements and Materials . . . . . . . . . . . . . . . . . 9-3
904 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
905 Means of Egress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
906 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
907 Energy Conservation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
908 Emergency Responder Communications Enhancement System Coverage. . . . . . . . . . . . . . . . 9-5
CHAPTER 10 CHANGE OF OCCUPANCY . . . . . . . . . . . . . . .10-3
1001 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
1002 Special Use and Occupancy. . . . . . . . . . . . . . . . . . . . . 10-3
1003 Building Elements and Materials . . . . . . . . . . . . . . . . 10-3
1004 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
1005 Means of Egress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
1006 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
1007 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
1008 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
1009 Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
1010 Other Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
1011 Change of Occupancy Classification . . . . . . . . . . . . . 10-5
CHAPTER 11 ADDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .11-3
CEBC § 308.3. High relevance — show source text
Psychiatric hospitals
308.3. 1 Five or fewer persons receiving medical care . A facility with five or fewer persons receiving medical care shall be classified as Group R-3 .1 or shall comply with the California Residential Code provided an automatic sprinkler system is installed in accordance with Section 903.3.1.3 of this code or Section R309 of the California Residential Code .
308.3.2 Reserved.
308.4 Institutional Group I-3. Institutional Group I-3 occupancy shall include buildings or portions of buildings and structures that are inhabited by more than five persons who are under restraint or security. A Group I-3 facility is occupied by persons who are generally incapable of self-preservation due to security measures not under the occupants’ control which includes persons restrained. This group shall include, but not be limited to, the following:
Correctional centers Correctional hospitals Correctional nursing facilities Correctional mental health facilities
Correctional treatment centers Courthouse holding facility Detention centers
Detention treatment room
Jails
Juvenile halls
Prerelease centers
Prisons
Reformatories
Secure interview rooms Temporary holding facility
Buildings of Group I-3 shall be classified as one of the occupancy conditions specified in Sections 308.4.1 through 308.5.8 and shall comply with Section 408.
308.4.1 Condition 1. This occupancy condition shall include buildings in which free movement is allowed from sleeping areas, and other spaces where access or occupancy is permitted, to the exterior via means of egress without restraint. A Condition 1 facility is permitted to be constructed as Group R.
308.4.2 Condition 2. This occupancy condition shall include buildings in which free movement is allowed from sleeping areas and any other occupied smoke compartment to one or more other smoke compartments. Egress to the exterior is impeded by locked exits.
308.4.3 Condition 3. This occupancy condition shall include buildings in which free movement is allowed within individual smoke compartments, such as within a residential unit composed of individual sleeping units and group activity spaces, where
2025 CALIFORNIA BUILDING CODE 3-13
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OCCUPANCY CLASSIFICATION AND USE
egress is impeded by remote-controlled release of means of egress from such a smoke compartment to another smoke compartment.
308.4.4 Condition 4. This occupancy condition shall include buildings in which free movement is restricted from an occupied space. Remote-controlled release is provided to permit movement from sleeping units, activity spaces and other occupied areas within the smoke compartment to other smoke compartments.
308.4.5 Condition 5. This occupancy condition shall include buildings in which free movement is restricted from an occupied space. Staff-controlled manual release is provided to permit movement from sleeping units, activity spaces and other occupied areas within the smoke compartment to other smoke compartments.
308.4.6 Condition 6. This occupancy condition shall include buildings containing only one temporary holding facility with six or fewer persons under restraint or security where the building is protected throughout with a monitored automatic sprinkler system installed in accordance with Section 903.3.1.1 and where the temporary holding facility is protected throughout with an automatic fire alarm system with notification appliances. A Condition 6 building shall be permitted to be classified as a Group B occupancy.
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 § 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
Frequently asked questions
When do I have to re‑calculate occupant load?
Recalculate occupant load whenever the occupancy classification changes; the CEBC requires egress capacity to meet the occupant load for the new occupancy per § 1011.5.3. Then apply CBC Chapter 10 methods to convert occupant load to exit widths/number.
If my change is to a lower hazard, do I have to change anything?
If the change is to an equal or lesser hazard (higher hazard number in Table 1011.5), existing egress elements must comply with Section 905 for the new occupancy; new or reconfigured egress must meet CBC Chapter 10. See § 1011.5.2.
Can I keep an existing open stair even after changing to a higher hazard?
Possibly — CEBC § 1011.5.1 includes exceptions that allow some existing stairways to continue in use (for example, existing stairways complying with Chapter 9 may be permitted subject to the code official’s approval). Always confirm with the code official.
Does adding sprinklers change egress upgrade requirements?
Sprinklers are governed under CEBC § 1011.2.1; installation of an automatic sprinkler system may be required by the CBC for the new occupancy and can affect other exceptions (e.g., some exterior opening protective requirements are waived if sprinklers are installed throughout).
Who makes the final determination about allowed exceptions?
The code official. Several CEBC exceptions permit existing features to remain “subject to approval of the code official” — always get the official determination documented. See the exceptions to § 1011.5.1.
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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What structural (live load, risk category) checks are required for a change of occupancy?
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California Existing Building Code