Skip to content
ChatProjectCodes

Chapter 5 — GENERAL BUILDING HEIGHTS AND AREAS

Section 506

California Building Code (Title 24, Part 2) · 2019 edition · updated 2026-09-12 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

506.1 General.

The floor area of a building shall be determined based on the type of construction, occupancy classification, whether there is an automatic sprinkler system installed throughout the building and the amount of building frontage on public way or open space.

506.1.1 Unlimited area buildings. Unlimited area buildings shall be designed in accordance with Section 507.

506.1.2 Special provisions. The special provisions of Section 510 permit the use of special conditions that are exempt from, or modify, the specific requirements of this chapter regarding the allowable areas of buildings based on the occupancy classification and type of construction, provided the special condition complies with the provisions specified in Section 510.

506.1.3 Basements. Basements need not be included in the total allowable floor area of a building provided the total area of such basements does not exceed the area permitted for a one-story above grade plane building.

506.2 Allowable area determination.

The allowable area of a building shall be determined in accordance with the applicable provisions of Sections 506.2.1 through 506.2.4 and Section 506.3.

506.2.1 Single-occupancy, one-story buildings. The allowable area of a single-occupancy building with no

GENERAL BUILDING HEIGHTS AND AREAS

more than one story above grade plane shall be determined in accordance with Equation 5-1:

Aa = At + ( NS × If ) (Equation 5-1)

where: Aa = Allowable area (square feet). At = Tabular allowable area factor (NS, S1, S13R or

S13D value, as applicable) in accordance with Table 506.2.

NS = Tabular allowable area factor in accordance with

Table 506.2 for nonsprinklered building (regardless of whether the building is sprinklered). If = Area factor increase due to frontage (percent) as

calculated in accordance with Section 506.3.

506.2.2 Mixed-occupancy, one-story buildings. The allowable area of a mixed-occupancy building with no more than one story above grade plane shall be determined in accordance with the applicable provisions of Section 508.1 based on Equation 5-1 for each applicable occupancy.

506.2.2.1 Group H-2 or H-3 mixed occupancies. For a building containing Group H-2 or H-3 occupancies, the allowable area shall be determined in accordance with Section 508.4.2, with the sprinkler system increase applicable only to the portions of the building not classified as Group H-2 or H-3.

506.2.3 Single-occupancy, multistory buildings. The allowable area of a single-occupancy building with more than one story above grade plane shall be determined in accordance with Equation 5-2:

Aa = [ At + ( NS × If )] × Sa (Equation 5-2)

where: Aa = Allowable area (square feet). At = Tabular allowable area factor (NS, S13R, S13D or

SM value, as applicable) in accordance with Table 506.2.

NS = Tabular allowable area factor in accordance with

Table 506.2 for a nonsprinklered building (regardless of whether the building is sprinklered). If = Area factor increase due to frontage (percent) as

calculated in accordance with Section 506.3. Sa = For other than Group A, E, H, I, L and R

occupancies, high-rise buildings, and other applications listed in Section 1.11 regulated by the Office of the State Fire Marshal, actual number of building stories above grade plane, not to exceed three. For Group A, E, H, I, L and R occupancies, high-rise buildings, and other applications listed in Section 1.11 regulated by the Office of the State Fire Marshal, actual number of building stories above grade plane, not to exceed two. No individual story shall exceed the allowable area ( Aa ) as determined by Equation 5-2 using the value of Sa = 1.

ove grade plane, not to exceed three. For Group A, E, H, I, L and R occupancies, high-rise buildings, and other applications listed in Section 1.11 regulated by the Office of the State Fire Marshal, actual number of building stories above grade plane, not to exceed two. No individual story shall exceed the allowable area ( Aa ) as determined by Equation 5-2 using the value of Sa = 1.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

GENERAL BUILDING HEIGHTS AND AREAS

TABLE 506.2 ALLOWABLE AREA FACTOR ( At = NS, S1, S13R, S13D or SM, as applicable) IN SQUARE FEET a, b, j

OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE OF CONSTRUCTION
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE I TYPE I TYPE II TYPE II TYPE III TYPE III TYPE IV TYPE V TYPE V
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES A B A B A B HT A B
A-1 NS UL UL 15,500 8,500 14,000 8,500 15,000 11,500 5,500
A-1 S1 UL UL 62,000 34,000 56,000 34,000 60,000 46,000 22,000
A-1 SM_ (without area increase)_ UL UL 46,500 25,500 42,000 25,500 45,000 34,500 16,500
A-1 SM (with area increase) UL UL 15,500 8,500 14,000 8,500 15,000 11,500 5,500
A-2 NS UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-2 S1 UL UL 62,000 38,000 56,000 38,000 60,000 46,000 24,000
A-2 SM_ (without area increase)_ UL UL 46,500 28,500 42,000 28,500 45,000 34,500 18,000
A-2 SM (with area increase) UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-3 NS UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-3 S1 UL UL 62,000 38,000 56,000 38,000 60,000 46,000 24,000
A-3 SM_ (without area increase)_ UL UL 46,500 28,500 42,000 28,500 45,000 34,500 18,000
A-3 SM (with area increase) UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-4 NS UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-4 S1 UL UL 62,000 38,000 56,000 38,000 60,000 46,000 24,000
A-4 SM_ (without area increase)_ UL UL 46,500 28,500 42,000 28,500 45,000 34,500 18,000
A-4 SM (with area increase) UL UL 15,500 9,500 14,000 9,500 15,000 11,500 6,000
A-5 NS UL UL UL UL UL UL UL UL UL
A-5 S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
A-5 SM SM SM SM SM SM SM SM SM SM
B NS UL UL 37,500 23,000 28,500 19,000 36,000 18,000 9,000
B S1 UL UL 150,000 92,000 114,000 76,000 144,000 72,000 36,000
B SM UL UL 112,500 69,000 85,500 57,000 108,000 54,000 27,000
E NS UL UL 26,500 14,500 23,500 14,500 25,500 18,500 9,500
E S1 UL UL 106,000 58,000 94,000 58,000 102,000 74,000 38,000
E SM_ (without area increase)_ UL UL 79,500 43,500 70,500 43,500 76,500 55,500 28,500
E SM (with area increase) UL UL 26,500 14,500 23,500 14,500 25,500 18,500 9.500
F-1 NS UL UL 25,000 15,500 19,000 12,000 33,500 14,000 8,500
F-1 S1 UL UL 100,000 62,000 76,000 48,000 134,000 56,000 34,000
F-1 SM UL UL 75,000 46,500 57,000 36,000 100,500 42,000 25,500
F-2 NS UL UL 37,500 23,000 28,500 18,000 50,500 21,000 13,000
F-2 S1 UL UL 150,000 92,000 114,000 72,000 202,000 84,000 52,000
F-2 SM UL UL 112,500 69,000 85,500 54,000 151,500 63,000 39,000
H-1 NSc 21,000 16,500 11,000 7,000 9,500 7,000 10,500 7,500 NP
H-1 S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
H-2 NSc 21,000 16,500 11,000 7,000 9,500 7,000 10,500 7,500 3,000
H-2 S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
H-2 SM SM SM SM SM SM SM SM SM SM
H-3 NSc UL 60,000 26,500 14,000 17,500 13,000 25,500 10,000 5,000
H-3 S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
H-3 SM SM SM SM SM SM SM SM SM SM

(continued)

186 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

GENERAL BUILDING HEIGHTS AND AREAS

TABLE 506.2—continued

ALLOWABLE AREA FACTO OR (At = NS, S1, S13R, S13D or SM, as applicable) IN SQUARE FEETa, b, j
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION TYPE OF CONSTRUCTION
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE I TYPE I TYPE II TYPE II TYPE III TYPE III TYPE IV TYPE V TYPE V
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES A B A B A B HT A B
H-4 NSc, d UL UL 37,500 17,500 28,500 17,500 36,000 18,000 6,500
H-4 S1 UL UL 150,000 70,000 114,000 70,000 144,000 72,000 26,000
H-4 SM_ (without area increase)_ UL UL 112,500 52,500 85,500 52,500 108,000 54,000 19,500
H-4 SM (with area increase) UL UL 37,500 17,500 28,500 17,500 36,000 18,000 6,500
H-5 NSc, d UL UL 37,500 23,000 28,500 19,000 36,000 18,000 9,000
H-5 S1 UL UL 150,000 92,000 114,000 76,000 144,000 72,000 36,000
H-5 SM_ (without area increase)_ UL UL 112,500 69,000 85,500 57,000 108000 54,000 27,000
H-5 SM (with area increase) UL UL 37,500 23,000 28,500 19,000 36,000 18,000 9,000
I-2_, I-2.1_ NSd, f UL UL 15,000 11,000 12,000 NP 12,000 9,500 NP
I-2_, I-2.1_ S1 UL UL 60,000 44,000 48,000 NP 48,000 38,000 NP
I-2_, I-2.1_ SM_ (without area increase)_ UL UL 45,000 33,000 36,000 NP 36,000 28,500 NP
I-2_, I-2.1_ SM (with area increase) UL UL 15,000 11,000 12,000 NP 12,000 9,500 NP
I-3 NSd, e UL 15,100 NP NP NP NP NP NP NP
I-3 S1 UL 45,300 NP NP NP NP NP NP NP
I-3 SM_ (without area increase)_ UL 30,200 NP NP NP NP NP NP NP
I-3 SM (with area increase) UL 15,100 NP NP NP NP NP NP NP
I-4 NSd, g UL 60,500 26,500 13,000 23,500 13,000 25,500 18,500 9,000
I-4 S1 UL 121,000 106,000 52,000 94,000 52,000 102,000 74,000 36,000
I-4 SM_ (without area increase)_ UL 181,500 79,500 39,000 70,500 39,000 76,500 55,500 27,000
I-4 SM (with area increase) UL 60,500 26,500 13,000 23,500 13,000 25,500 18,500 9,000
L NS UL 60,000 37,500 17,500 28,500 17,500 36,000 18,000 6,500
L S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
L SM SM SM SM SM SM SM SM SM SM
M NS UL UL 21,500 12,500 18,500 12,500 20,500 14,000 9,000
M S1 UL UL 86,000 50,000 74,000 50,000 82,000 56,000 36,000
M SM UL UL 64,500 37,500 55,500 37,500 61,500 42,000 27,000
R-1h NSd UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-1h S13R S13R S13R S13R S13R S13R S13R S13R S13R S13R
R-1h S1 UL UL 96,000 64,000 96,000 64,000 82,000 48,000 28,000
R-1h SM_ (without area increase)_ UL UL 72,000 48,000 72,000 48,000 61,500 36,000 21,000
R-1h SM (with area increase) UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-2h NSd UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-2h S13R S13R S13R S13R S13R S13R S13R S13R S13R S13R
R-2h S1 UL UL 96,000 64,000 96,000 64,000 82,000 48,000 28,000
R-2h SM_ (without area increase)_ UL UL 72,000 48,000 72,000 48,000 61,500 36,000 21,000
R-2h SM (with area increase) UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-2 Type VA
constructionk		 NSd NP NP NP NP NP NP NP 12,000 NP
R-2 Type VA
constructionk		 S13R NP NP NP NP NP NP NP 12,000 NP
R-2 Type VA
constructionk		 S1 NP NP NP NP NP NP NP 48,000 NP
R-2 Type VA
constructionk		 SM (without height increase) NP NP NP NP NP NP NP 36,000 NP
R-2 Type VA
constructionk		 SM (with height increase) NP NP NP NP NP NP NP 36,000 j NP

(continued)

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

GENERAL BUILDING HEIGHTS AND AREAS

TABLE 506.2—continued ALLOWABLE AREA FACTOR ( At = NS, S1, S13R, S13D or SM, as applicable) IN SQUARE FEET a, b, j

OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE OF CONSTRUCTION
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES TYPE I TYPE I TYPE II TYPE II TYPE III TYPE III TYPE IV TYPE V TYPE V
OCCUPANCY
CLASSIFICATION		 SEE FOOTNOTES A B A B A B HT A B
R-2.1h NSd UL 55,000 19,000 NP 16,500 NP NP 10,500 NP
R-2.1h S13R UL 55,000 19,000 NP 16,500 NP NP 10,500 NP
R-2.1h S1 UL 220,000 76,000 NP 66,000 NP 72,000 42,000 NP
R-2.1h SM (without height increase) UL 165,000 57,000 NP 49,500 NP 54,000 31,500 NP
R-2.1h SM (with height increase) UL 55,000 19,000 NP 16,500 NP NP 10,500 NP
R-2.2h S1 UL UL 96,000 64,000 96,000 64,000 82,000 48,000 28,000
R-2.2h SM (without height increase) UL UL 72,000 48,000 72,000 48,000 61,500 36,000 21,000
R-2.2h SM (with height increase) UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-3_, R-3.1h_ NSd UL UL UL UL UL UL UL UL UL
R-3_, R-3.1h_ S13D S13D S13D S13D S13D S13D S13D S13D S13D S13D
R-3_, R-3.1h_ S13R S13R S13R S13R S13R S13R S13R S13R S13R S13R
R-3_, R-3.1h_ S1 S1 S1 S1 S1 S1 S1 S1 S1 S1
R-3_, R-3.1h_ SM SM SM SM SM SM SM SM SM SM
R-4h NSd UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
R-4h S13D S13D S13D S13D S13D S13D S13D S13D S13D S13D
R-4h S13R S13R S13R S13R S13R S13R S13R S13R S13R S13R
R-4h S1 UL UL 96,000 64,000 96,000 64,000 82,000 48,000 28,000
R-4h SM_ (without height increase)_ UL UL 72,000 48,000 72,000 48,000 61,500 36,000 21,000
R-4h SM (with height increase) UL UL 24,000 16,000 24,000 16,000 20,500 12,000 7,000
S-1 NS UL 48,000 26,000 17,500 26,000 17,500 25,500 14,000 9,000
S-1 S1 UL 192,000 104,000 70,000 104,000 70,000 102,000 56,000 36,000
S-1 SM UL 144,000 78,000 52,500 78,000 52,500 76,500 42,000 27,000
S-2 NS UL 79,000 39,000 26,000 39,000 26,000 38,500 21,000 13,500
S-2 S1 UL 316,000 156,000 104,000 156,000 104,000 154,000 84,000 54,000
S-2 SM UL 237,000 117,000 78,000 117,000 78,000 115,500 63,000 40,500
U NSi UL 35,500 19,000 8,500 14,000 8,500 18,000 9,000 5,500
U S1 UL 142,000 76,000 34,000 56,000 34,000 72,000 36,000 22,000
U SM UL 106,500 57,000 25,500 42,000 25,500 54,000 27,000 16,500

For SI: 1 square foot = 0.0929 m 2 .

UL = Unlimited; NP = Not Permitted; NS = Buildings not equipped throughout with an automatic sprinkler system; S1 = Buildings a maximum of one story above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; SM = Buildings two or more stories above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3. a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter. b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies. c. New Group H and all Group L occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5. d. The NS value is only for use in evaluation of existing building area in accordance with the California Existing Building Code . e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1

occupancies, Condition 1, see Exception 1 of Section 903.2.6. f. New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5

of the California Fire Code . g. New Group I-4 occupancies see Exceptions 2 and 3 of Section 903.2.6. h. New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8. i. The maximum allowable area for a single-story nonsprinklered Group U greenhouse is permitted to be 9,000 square feet, or the allowable area shall be

permitted to comply with Table C102.1 of Appendix C. j. In other than Group A, E, H, I, L, and R occupancies, high-rise buildings, and other applications listed in Section 1.11 regulated by the Office of the State Fire

Marshal, the S increases for height and stories in Tables 504.3 and 504.4 are permitted in addition to the S area increase in accordance with Table 506.2. k. For Group R-2 buildings of Type VA construction equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1,

S area increase is permitted in addition to the height and story increase provided the height shall not exceed 60 feet and 4 stories.

188 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

GENERAL BUILDING HEIGHTS AND AREAS

less of the actual width of the public way or open space. Where the value of W varies along the perimeter of the building, the calculation performed in accordance with Equation 5-5 shall be based on the weighted average calculated in accordance with Equation 5-4.

W = ( L1 × w1 + L2 × w2 + L3 × w3 …)/ F (Equation 5-4)

where:

W (Width: weighted average) = Calculated width of public way or open space (feet). Ln = Length of a portion of the exterior perimeter wall. wn = Width ( 20 feet) of a public way or open space

associated with that portion of the exterior perimeter wall.

F = Building perimeter that fronts on a public way or

open space having a width of 20 feet (6096 mm) or more.

Exception: Where a building meets the requirements of Section 507, as applicable, except for compliance with the minimum 60-foot (18 288 mm) public way or yard requirement, and the value of W is greater than 30 feet (9144 mm), the value of W shall not exceed 60 feet (18 288 mm).

506.3.3 Amount of increase. The area factor increase based on frontage shall be determined in accordance with Equation 5-5:

If = [ F/P - 0.25] W /30 (Equation 5-5)

where: If = Area factor increase due to frontage. F = Building perimeter that fronts on a public way or

open space having minimum distance of 20 feet (6096 mm).

P = Perimeter of entire building (feet).

W = Width of public way or open space (feet) in

accordance with Section 506.3.2.

Get a plain-English answer with a citation back to this text.

Ask AI about this code
Export this section
▸Contents — California Building Code (Title 24, Part 2)
California Building Code (Title 24, Part 2)
  1. Chapter 2 — DEFINITIONS AND ABBREVIATIONS
  2. Appendix G — FLOOD-RESISTANT
  3. Appendix L — EARTHQUAKE RECORDING
  4. Appendix M — TSUNAMI-GENERATED
  5. Chapter 1 — SCOPE AND ADMINISTRATION
  6. Chapter 3 — OCCUPANCY CLASSIFICATION AND USE
  7. Chapter 4 — SPECIAL DETAILED REQUIREMENTS BASED
  8. ▸Chapter 5 — GENERAL BUILDING HEIGHTS AND AREAS
    Overview
    1. Section 501
    2. Section 502
    3. Section 503
    4. Section 504
    5. Section 505
    6. Section 506
    7. Section 507
    8. Section 508
    9. Section 509
    10. Section 510
  9. Chapter 6 — TYPES OF CONSTRUCTION
  10. Chapter 7 — FIRE AND SMOKE PROTECTION FEATURES
  11. Chapter 7A — MATERIALS AND CONSTRUCTION
  12. Chapter 8 — INTERIOR FINISHES
  13. Chapter 9 — FIRE PROTECTION AND LIFE SAFETY SYSTEMS
  14. Chapter 10 — MEANS OF EGRESS
  15. Chapter 11A — HOUSING ACCESSIBILITY
  16. Chapter 11B — ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMM…
  17. Chapter 12 — INTERIOR ENVIRONMENT
  18. Chapter 14 — EXTERIOR WALLS
  19. Chapter 15 — ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
  20. Chapter 16 — STRUCTURAL DESIGN
  21. Chapter 16A — STRUCTURAL DESIGN
  22. Chapter 17 — SPECIAL INSPECTIONS AND TESTS
  23. Chapter 18 — SOILS AND FOUNDATIONS
  24. Chapter 19 — CONCRETE
  25. Chapter 20 — ALUMINUM
  26. Chapter 21 — MASONRY
  27. Chapter 22 — STEEL
  28. Chapter 23 — WOOD
  29. Chapter 24 — GLASS AND GLAZING
  30. Chapter 25 — GYPSUM BOARD, GYPSUM PANEL PRODUCTS AND PLASTER
  31. Chapter 26 — PLASTIC
  32. Chapter 27 — ELECTRICAL
  33. Chapter 28 — MECHANICAL SYSTEMS
  34. Chapter 30 — ELEVATORS AND CONVEYING SYSTEMS
  35. Chapter 31 — SPECIAL CONSTRUCTION
  36. Chapter 31B — PUBLIC POOLS
  37. Chapter 31C — RADIATION
  38. Chapter 31D — FOOD ESTABLISHMENTS
  39. Chapter 31F — MARINE OIL TERMINALS
  40. Chapter 32 — ENCROACHMENTS INTO THE PUBLIC RIGHT-OF-WAY
  41. Chapter 33 — SAFEGUARDS DURING CONSTRUCTION
  42. Chapter 35 — REFERENCED STANDARDS
  43. Appendix A — EMPLOYEE QUALIFICATIONS
  44. Appendix B — BOARD OF APPEALS
  45. Appendix C — GROUP U – AGRICULTURAL BUILDINGS
  46. Appendix D — FIRE DISTRICTS
  47. Appendix F — RODENTPROOFING
  48. Appendix H — SIGNS
  49. Appendix I — PATIO COVERS
  50. Appendix J — GRADING
  51. Appendix K — GROUP R-3 AND GROUP R-3.1 OCCUPANCIES
  52. Appendix N — REPLICABLE BUILDINGS
  53. Appendix O — EMERGENCY HOUSING

GoCodebook provides public access, search, citation, multilingual explanation, and practical interpretation of legally adopted building regulations. It is not a substitute for the official ICC or California code publications.