California Building Standards Code
2025 California Residential Code (Title 24, Part 2.5)
Part 2.5 of Title 24 — Construction standards for one- and two-family dwellings and townhouses up to three stories.
- Edition
- 2025
- Effective
- 2026-01-01
- Last ingested
- 2026-07-07
- Contents
- 11 chapters · 226 sections
- Jurisdiction
- California
Browse the full structure below. The verbatim text of this code is available through GoCodebook AI answers with exact section citations.
Contents
-
▸ Chapter 1 — ADMINISTRATION
Overview- Section 1.1 — GENERAL
- Section 1.2 — RESERVED
- Section 1.3 — RESERVED
- Section 1.4 — RESERVED
- Section 1.5 — RESERVED
- Section 1.6 — RESERVED
- Section 1.7 — RESERVED
- Section 1.8 — DEPARTMENT OF HOUSING AND COMMUNITY DEVELOPMENT (HCD)
- Section 1.8.2 — AUTHORITY AND ABBREVIATIONS
- Section 1.8.3 — LOCAL ENFORCING AGENCY
- Section 1.8.4 — PERMITS, FEES, APPLICATIONS AND INSPECTIONS
- Section 1.8.5 — RIGHT OF ENTRY FOR ENFORCEMENT
- Section 1.8.6 — LOCAL MODIFICATION BY ORDINANCE OR REGULATION
- Section 1.8.7 — ALTERNATE MATERIALS, DESIGNS, TESTS AND METHODS OF CONSTRUCTION
- Section 1.8.8 — APPEALS BOARD
- Section 1.8.9 — UNSAFE BUILDINGS OR STRUCTURES
- Section 1.8.10 — OTHER BUILDING REGULATIONS
- Section 1.9 — RESERVED
- Section 1.10 — RESERVED
- Section 1.11 — OFFICE OF THE STATE FIRE MARSHAL
- Section 1.12 — RESERVED
- Section 1.13 — RESERVED
- Section 1.14 — RESERVED
- Section R101 — SCOPE AND GENERAL REQUIREMENTS
- Section R102 — APPLICABILITY
- Section R103 — CODE COMPLIANCE AGENCY
- Section R104 — DUTIES AND POWERS OF THE BUILDING OFFICIAL
- Section R105 — PERMITS
- Section R106 — CONSTRUCTION DOCUMENTS
- Section R107 — TEMPORARY STRUCTURES AND USES
- Section R108 — FEES
- Section R109 — INSPECTIONS
- Section R110 — CERTIFICATE OF OCCUPANCY
- Section R111 — SERVICE UTILITIES
- Section R112 — MEANS OF APPEALS
- Section R113 — VIOLATIONS
- Section R114 — STOP WORK ORDER
-
▸ Chapter 2 — DEFINITIONS
-
▸ Chapter 3 — BUILDING PLANNING
Overview- Section R300 — SITE DRAINAGE
- Section R301 — DESIGN CRITERIA
- Section R302 — FIRE-RESISTANT CONSTRUCTION
- Section R303 — FOAM PLASTIC
- Section R304 — PROTECTION OF WOOD AND WOOD-BASED PRODUCTS AGAINST DECAY
- Section R305 — PROTECTION AGAINST SUBTERRANEAN TERMITES
- Section R306 — FLOOD-RESISTANT CONSTRUCTION
- Section R307 — STORM SHELTERS
- Section R308 — SITE ADDRESS
- Section R309 — AUTOMATIC SPRINKLER SYSTEMS
- Section R310 — SMOKE ALARMS
- Section R311 — CARBON MONOXIDE ALARMS
- Section R312 — MINIMUM ROOM AREAS
- Section R313 — CEILING HEIGHT
- Section R314 — MEZZANINES
- Section R315 — SLEEPING LOFTS
- Section R316 — HABITABLE ATTICS
- Section R317 — GARAGES AND CARPORTS
- Section R318 — MEANS OF EGRESS
- Section R319 — EMERGENCY ESCAPE AND RESCUE OPENINGS
- Section R320 — HANDRAILS
- Section R321 — GUARDS AND WINDOW FALL PROTECTION
- Section R322 — ACCESSIBILITY
- Section R323 — ELEVATORS AND PLATFORM LIFTS
- Section R324 — GLAZING
- Section R325 — LIGHT, VENTILATION AND HEATING
- Section R326 — SANITATION
- Section R327 — TOILET, BATH AND SHOWER SPACES
- Section R328 — AGING-IN-PLACE DESIGN AND FALL PREVENTION
- Section R329 — SOLAR ENERGY SYSTEMS
- Section R330 — ENERGY STORAGE SYSTEMS
- Section R331 — STATIONARY ENGINE GENERATORS
- Section R332 — STATIONARY FUEL CELL POWER SYSTEMS
- Section R333 — RESERVED
- Section R334 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING
- Section R335 — SPECIAL PROVISIONS FOR LICENSED 24-HOUR CARE FACILITIES IN A GROUP R-3.1
- Section R336 — LARGE FAMILY DAY-CARE HOMES
- Section R337 — MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE
- Section R338 — ELECTRIC VEHICLE
- Section 339 — RESERVED
- Section R340 — POLLUTANT CONTROL
-
▸ Chapter 4 — FOUNDATIONS
-
▸ Chapter 5 — FLOORS
-
▸ Chapter 6 — WALL CONSTRUCTION
Overview- Section R601 — GENERAL
- Section R602 — WOOD WALL FRAMING
- Section R603 — COLD-FORMED STEEL WALL FRAMING
- Section R604 — WOOD STRUCTURAL PANELS
- Section R605 — PARTICLEBOARD
- Section R606 — GENERAL MASONRY CONSTRUCTION
- Section R607 — GLASS UNIT MASONRY
- Section R608 — EXTERIOR CONCRETE WALL CONSTRUCTION
- Section R609 — EXTERIOR WINDOWS AND DOORS
- Section R610 — STRUCTURAL INSULATED PANEL WALL CONSTRUCTION
-
▸ Chapter 9 — ROOF ASSEMBLIES
Overview- Section R901 — GENERAL
- Section R902 — FIRE CLASSIFICATION
- Section R903 — WEATHER PROTECTION
- Section R904 — MATERIALS
- Section R905 — REQUIREMENTS FOR ROOF COVERINGS
- Section R906 — ROOF INSULATION
- Section R907 — ROOFTOP-MOUNTED PHOTOVOLTAIC PANEL SYSTEMS
- Section R908 — REROOFING
- Section R909 — ROOF COATINGS
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▸ Chapter 44 — REFERENCED STANDARDS
Overview- Section AA101 — GENERAL
- Section AB101 — GENERAL
- Section BB101 — GENERAL
- Section BB102 — DEFINITIONS
- Section BB103 — CEILING HEIGHT
- Section BB104 — LOFTS
- Section BB105 — EMERGENCY ESCAPE AND RESCUE OPENINGS
- Section BE101 — SCOPE
- Section BE102 — DEFINITIONS
- Section BE103 — REQUIREMENTS
- Section BE104 — TESTING
- Section BF101 — GENERAL
- Section BF102 — DEFINITION
- Section BF103 — EXTERIOR WALLS AND OPENINGS
- Section BF104 — HEIGHT
- Section BF105 — STRUCTURAL PROVISIONS
- Section BF106 — SPECIAL PROVISIONS FOR ALUMINUM SCREEN ENCLOSURES IN HURRICANE-PRONE REGIONS
- Section BG101 — GENERAL
- Section BG102 — AIRBORNE SOUND
- Section BG103 — STRUCTURAL-BORNE SOUND
- Section BG104 — REFERENCED STANDARDS
- Section BH101 — GENERAL
- Section BH102 — DEFINITION
- Section BH103 — AUTOMATIC VEHICULAR GATES
- Section BH104 — REFERENCED STANDARDS
- Section BI101 — GENERAL
- Section BI102 — DEFINITIONS
- Section BI103 — NONBEARING LIGHT STRAW-CLAY CONSTRUCTION
- Section BI104 — THERMAL PERFORMANCE
- Section BI105 — REFERENCED STANDARDS
- Section BJ101 — GENERAL
- Section BJ102 — DEFINITIONS
- Section BJ103 — BALES
- Section BJ104 — FINISHES
- Section BJ105 — STRAWBALE WALLS—GENERAL
- Section BJ106 — STRAWBALE WALLS—STRUCTURAL
- Section BJ107 — FIRE RESISTANCE
- Section BJ108 — THERMAL INSULATION
- Section BJ109 — REFERENCED STANDARDS
- Section BK101 — GENERAL
- Section BK102 — DEFINITIONS
- Section BK103 — MATERIALS, MIXING AND INSTALLATION
- Section BK104 — FINISHES
- Section BK105 — COB WALLS—GENERAL
- Section BK106 — COB WALLS—STRUCTURAL
- Section BK107 — COB FLOORS
- Section BK108 — FIRE RESISTANCE
- Section BK109 — THERMAL PERFORMANCE
- Section BK110 — REFERENCED STANDARDS
- Section BL101 — GENERAL
- Section BL102 — DEFINITIONS
- Section BL103 — HEMP-LIME CONSTRUCTION
- Section BL104 — FINISHES
- Section BL105 — FIRE RESISTANCE
- Section BL106 — THERMAL PERFORMANCE
- Section BL107 — MECHANICAL PERFORMANCE
- Section BL108 — REFERENCED STANDARDS
- Section BM101 — GENERAL
- Section BM102 — DEFINITIONS
- Section BM103 — BUILDING DESIGN
- Section BM104 — BUILDING CONSTRUCTION
- Section BM105 — SPECIAL INSPECTIONS
- Section BM106 — REFERENCED STANDARDS
- Section BN101 — GENERAL
- Section BN102 — CONSTRUCTION REQUIREMENTS
- Section BO101 — PURPOSE AND INTENT
- Section BO102 — COMPLIANCE
- Section BO103 — DEFINITIONS
- Section BO104 — REPAIRS
- Section BO105 — ALTERATIONS
- Section BO106 — ADDITION
- Section BO107 — RELOCATED BUILDINGS
- Section BO108 — REFERENCED STANDARDS
- Section CH101 — GENERAL
- Section CJ101 — GENERAL
- Section CJ102 — DEFINITIONS
- Section CJ103 — EMERGENCY HOUSING
- Section CJ104 — EMERGENCY SLEEPING CABINS
- Section CJ105 — EMERGENCY TRANSPORTABLE HOUSING UNITS
- Section CJ106 — TENTS AND MEMBRANE STRUCTURES
- Section CJ107 — ACCESSIBILITY
- Section CJ108 — LOFTS IN EMERGENCY HOUSING
- Section CJ109 — LOCATION, MAINTENANCE AND IDENTIFICATION
- Section CJ110 — EMERGENCY HOUSING FACILITIES