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Chapter 3 — BUILDING PLANNING

Section R328 — AGING-IN-PLACE DESIGN AND FALL PREVENTION

2025 California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-07-29 · California

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

R328.1 Aging-in-place design and fall prevention.

Newly constructed dwellings subject to the requirements of this code shall be designed and constructed in accordance with Sections R328.1.1 through R328.1.4.

Exceptions: 1. Covered multifamily dwellings designed and constructed in accordance with Chapter 11A of the California Building Code. 2. Public housing and places of public accommodation required to comply with Chapter 11B of the California Building Code.

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

BUILDING PLANNING

R328.1.1 Reinforcement for grab bars. At least one bathroom on the entry level shall be provided with reinforcement installed in accordance with this section. Where there is no bathroom on the entry level, at least one bathroom on the second or third floor of the dwelling shall comply with this section. 1. Reinforcement shall be solid lumber or other construction materials approved by the enforcing agency. 2. Reinforcement shall not be less than 2 by 8 inch (51 mm by 203 mm) nominal lumber. [1 [1] / 2 inch by 7 [1] / 4 inch (38 mm by 184 mm) actual dimension] or other construction material providing equal height and load capacity. Reinforcement shall be located between 32 inches (812.8 mm) and 39 [1] / 4 inches (997 mm) above the finished floor flush with the wall framing. 3. Water closet reinforcement shall be installed on both side walls of the fixture, or one side wall and the back wall.

4. Shower reinforcement shall be continuous where wall framing is provided. 5. Bathtub and combination bathtub/shower reinforcement shall be continuous on each end of the bathtub and the back wall. Additionally, back wall reinforcement for a lower grab bar shall be provided with the bottom edge located no more than 6 inches (152.4 mm) above the bathtub rim.

Exceptions: 1. Where the water closet is not placed adjacent to a side wall capable of accommodating a grab bar, the bathroom shall have provisions for installation of floor-mounted, foldaway or similar alternate grab bar reinforcements approved by the enforcing agency. 2. Reinforcement shall not be required in wall framing for pre-fabricated shower enclosures and bathtub wall panels with integral factory-installed grab bars or when factory-installed reinforcement for grab bars is provided. 3. Shower enclosures that do not permit installation of reinforcement and/or grab bars shall be permitted, provided rein- forcement for installation of floor-mounted grab bars or an alternate method is approved by the enforcing agency. 4. Bathtubs with no surrounding walls, or where wall panels do not permit the installation of reinforcement shall be permit- ted, provided reinforcement for installation of floor-mounted grab bars adjacent to the bathtub or an alternate method is approved by the enforcing agency. 5. Reinforcement of floors shall not be required for bathtubs and water closets installed on concrete slab floors.

athtubs with no surrounding walls, or where wall panels do not permit the installation of reinforcement shall be permit-_ ted, provided reinforcement for installation of floor-mounted grab bars adjacent to the bathtub or an alternate method is approved by the enforcing agency. 5. Reinforcement of floors shall not be required for bathtubs and water closets installed on concrete slab floors.

R328.1.1.1 Documentation for grab bar reinforcement. Information and/or drawings identifying the location of grab bar rein- forcement shall be placed in the operation and maintenance manual in accordance with the California Green Building Standards Code, Chapter 4, Division 4.4.

R328.1.2 Electrical receptacle outlet, switch and control heights. Electrical receptacle outlets, switches and controls (including controls for heating, ventilation and air conditioning) intended to be used by occupants shall be located no more than 48 inches (1219.2 mm) measured from the top of the outlet box and not less than 15 inches (381 mm) measured from the bottom of the outlet box above the finish floor.

Exceptions: 1. Dedicated receptacle outlets; floor receptacle outlets; controls mounted on ceiling fans and ceiling lights; and controls located on appliances. 2. Receptacle outlets required by the California Electrical Code on a wall space where the distance between the finished floor and a built-in feature above the finish floor, such as a window, is less than 15 inches (381 mm).

R328.1.3 Interior doors. Effective July 1, 2024, at least one bathroom and one bedroom on the entry level shall provide a doorway with a net clear opening of not less than 32 inches (812.8 mm), measured with the door positioned at an angle of 90 degrees from the closed position; or, in the case of a two- or three-story single family dwelling, on the second or third floor of the dwelling if a bathroom or bedroom is not located on the entry level.

R328.1.4 Doorbell buttons. Doorbell buttons or controls, when installed, shall not exceed 48 inches (1219.2 mm) above exterior floor or landing, measured from the top of the doorbell button assembly. Where doorbell buttons integrated with other features are required to be installed above 48 inches (1219.2 mm) measured from the exterior floor or landing, a standard doorbell button or control shall also be provided at a height not exceeding 48 inches (1219.2 mm) above exterior floor or landing, measured from the top of the doorbell button or control.

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▸ Contents — 2025 California Residential Code (Title 24, Part 2.5)
2025 California Residential Code (Title 24, Part 2.5)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. ▸ Chapter 3 — BUILDING PLANNING
    Overview
    1. Section R300 — SITE DRAINAGE
    2. Section R301 — DESIGN CRITERIA
    3. Section R302 — FIRE-RESISTANT CONSTRUCTION
    4. Section R303 — FOAM PLASTIC
    5. Section R304 — PROTECTION OF WOOD AND WOOD-BASED PRODUCTS AGAI…
    6. Section R305 — PROTECTION AGAINST SUBTERRANEAN TERMITES
    7. Section R306 — FLOOD-RESISTANT CONSTRUCTION
    8. Section R307 — STORM SHELTERS
    9. Section R308 — SITE ADDRESS
    10. Section R309 — AUTOMATIC SPRINKLER SYSTEMS
    11. Section R310 — SMOKE ALARMS
    12. Section R311 — CARBON MONOXIDE ALARMS
    13. Section R312 — MINIMUM ROOM AREAS
    14. Section R313 — CEILING HEIGHT
    15. Section R314 — MEZZANINES
    16. Section R315 — SLEEPING LOFTS
    17. Section R316 — HABITABLE ATTICS
    18. Section R317 — GARAGES AND CARPORTS
    19. Section R318 — MEANS OF EGRESS
    20. Section R319 — EMERGENCY ESCAPE AND RESCUE OPENINGS
    21. Section R320 — HANDRAILS
    22. Section R321 — GUARDS AND WINDOW FALL PROTECTION
    23. Section R322 — ACCESSIBILITY
    24. Section R323 — ELEVATORS AND PLATFORM LIFTS
    25. Section R324 — GLAZING
    26. Section R325 — LIGHT, VENTILATION AND HEATING
    27. Section R326 — SANITATION
    28. Section R327 — TOILET, BATH AND SHOWER SPACES
    29. Section R328 — AGING-IN-PLACE DESIGN AND FALL PREVENTION
    30. Section R329 — SOLAR ENERGY SYSTEMS
    31. Section R330 — ENERGY STORAGE SYSTEMS
    32. Section R331 — STATIONARY ENGINE GENERATORS
    33. Section R332 — STATIONARY FUEL CELL POWER SYSTEMS
    34. Section R333 — RESERVED
    35. Section R334 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECY…
    36. Section R335 — SPECIAL PROVISIONS FOR LICENSED 24-HOUR CARE FA…
    37. Section R336 — LARGE FAMILY DAY-CARE HOMES
    38. Section R337 — MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR…
    39. Section R338 — ELECTRIC VEHICLE
    40. Section 339 — RESERVED
    41. Section R340 — POLLUTANT CONTROL
  4. Chapter 4 — FOUNDATIONS
  5. Chapter 5 — FLOORS
  6. Chapter 6 — WALL CONSTRUCTION
  7. Chapter 7 — WALL COVERING
  8. Chapter 8 — ROOF-CEILING CONSTRUCTION
  9. Chapter 9 — ROOF ASSEMBLIES
  10. Chapter 10 — CHIMNEYS AND FIREPLACES
  11. Chapter 44 — REFERENCED STANDARDS
  12. Appendix AA — BOARD OF APPEALS
  13. Appendix AB — PERMIT FEES
  14. Appendix AC — RESERVED
  15. Appendix BA — RESERVED
  16. Appendix BB — TINY HOUSES
  17. Appendix BC — RESERVED
  18. Appendix BD — RESERVED
  19. Appendix BE — RADON CONTROL METHODS
  20. Appendix BF — PATIO COVERS
  21. Appendix BG — SOUND TRANSMISSION
  22. Appendix BH — AUTOMATIC VEHICULAR GATES
  23. Appendix BI — LIGHT STRAW-CLAY CONSTRUCTION
  24. Appendix BJ — STRAWBALE CONSTRUCTION
  25. Appendix BK — COB CONSTRUCTION (MONOLITHIC ADOBE)
  26. Appendix BL — HEMP-LIME (HEMPCRETE) CONSTRUCTION
  27. Appendix BM — 3D-PRINTED BUILDING CONSTRUCTION
  28. Appendix BN — EXTENDED PLATE WALL CONSTRUCTION
  29. Appendix BO — EXISTING BUILDINGS AND STRUCTURES
  30. Appendix CA — RESERVED
  31. Appendix CB — RESERVED
  32. Appendix CC — RESERVED
  33. Appendix CD — RESERVED
  34. Appendix CE — RESERVED
  35. Appendix CF — RESERVED
  36. Appendix CG — NONSEWERED SANITATION SYSTEMS
  37. Appendix CH — PRIVATE SEWAGE DISPOSAL
  38. Appendix CI — SWIMMING POOL SAFETY ACT
  39. Appendix CJ — EMERGENCY HOUSING
  40. Appendix CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL…

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