California Accessibility Crosswalk
CBC Chapters 11A & 11B vs. ADA 2010 Standards Comparison
Prepared for California Design Professionals | Current as of 2025 CBC
Legend: Understanding the Differences
UNCHANGED
California requirement matches ADA 2010 Standards (federal baseline)
MORE STRINGENT
California requires more than ADA (stricter/additional requirements)
LESS STRINGENT
California allows less than ADA (more permissive – RARE)
CA SPECIFIC
California-only requirement with no ADA equivalent
ADA SPECIFIC
ADA requirement with no California equivalent
Bottom Line for California Design Professionals
General Rule: California = ADA + MORE. When in doubt, California is more restrictive. Both must be satisfied; California controls for state projects, but federal ADA always applies to public accommodations.
CSE Exam Focus: Know where California differs (parking, counter heights, path of travel triggers, detectable warnings). These differences are HIGH-VALUE exam topics.
Detailed Comparison by Element
| Element | Status | ADA 2010 Standards | CBC Chapter 11B |
|---|---|---|---|
| PARKING SPACES | |||
| Standard Space Width | MORE STRINGENT | Car: 96″ min Van: 132″ min (ADA 502.2) |
Car: 108″ min (12″ wider) Van: 144″ min (12″ wider) (CBC 11B-502.2) CA is 1 foot wider for both types |
| Space Length | CA SPECIFIC | Not specified in ADA (typically local code) |
216″ min (18 feet) (CBC 11B-502.2) California specifies minimum length |
| Access Aisle Width | UNCHANGED | 60″ min for car and van (ADA 502.3.1) |
60″ min for car and van (CBC 11B-502.3.1) Same as ADA |
| Van Space Alternative | MORE STRINGENT | Van may be 96″ wide IF aisle is 96″ wide (ADA 502.2 Exception) |
Van may be 108″ wide IF aisle is 96″ wide (CBC 11B-502.2 Exception) CA requires wider space even in alternative |
| Aisle Marking | MORE STRINGENT | Marked to discourage parking (ADA 502.3.3) |
Blue painted borderline + hatched lines max 36″ on center in contrasting color (blue/white preferred) (CBC 11B-502.3.3) CA specifies exact colors and pattern |
| Van Accessible Ratio | UNCHANGED | 1 in 6 accessible spaces must be van accessible (ADA 208.2.4) |
1 in 6 accessible spaces must be van accessible (CBC 11B-208.3.1) Same ratio |
| Sign Height | UNCHANGED | 60″ min above ground to bottom of sign (ADA 502.6) |
60″ min above ground to bottom of sign (CBC 11B-502.6) Same as ADA |
| ACCESSIBLE ROUTES | |||
| Clear Width (Continuous) | UNCHANGED | 36″ min continuous clear width (ADA 403.5.1) |
36″ min continuous clear width (CBC 11B-403.5.1) Same as ADA |
| Passing Spaces | UNCHANGED | Required every 200′ max if route < 60" wide Passing space: 60″ × 60″ (ADA 403.5.3) |
Required every 200′ max if route < 60" wide Passing space: 60″ × 60″ (CBC 11B-403.5.3) Same as ADA |
| Running Slope | UNCHANGED | 1:20 max (5%) Steeper = ramp (ADA 403.3) |
1:20 max (5%) Steeper = ramp (CBC 11B-403.3) Same as ADA |
| Cross Slope | UNCHANGED | 1:48 max (2.08%) (ADA 403.3) |
1:48 max (2.08%) (CBC 11B-403.3) Same as ADA |
| DOORS & DOORWAYS | |||
| Clear Opening Width | UNCHANGED | 32″ min clear opening (ADA 404.2.3) |
32″ min clear opening (CBC 11B-404.2.3) Same as ADA |
| Hardware Operation | UNCHANGED | One hand, no tight grasping/twisting 5 lbs max force (ADA 404.2.7, 309.4) |
One hand, no tight grasping/twisting 5 lbs max force (CBC 11B-404.2.7, 11B-309.4) Same as ADA |
| Maneuvering Clearances | UNCHANGED | Varies by approach direction: Front pull: 60″ × 18″ latch side Front push: 48″ × 0″ (+ 12″ if closer) (ADA 404.2.4.1, Table) |
Same dimensions as ADA (CBC 11B-404.2.4.1, Table) Same as ADA |
| Threshold Height | UNCHANGED | 1/2″ max Vertical up to 1/4″; beveled if 1/4″-1/2″ (ADA 404.2.5) |
1/2″ max Vertical up to 1/4″; beveled if 1/4″-1/2″ (CBC 11B-404.2.5) Same as ADA |
| RAMPS | |||
| Running Slope | UNCHANGED | 1:12 max (8.33%) (ADA 405.2) |
1:12 max (8.33%) (CBC 11B-405.2) Same as ADA |
| Cross Slope | UNCHANGED | 1:48 max (2.08%) (ADA 405.3) |
1:48 max (2.08%) (CBC 11B-405.3) Same as ADA |
| Handrails Required | UNCHANGED | When rise > 6″ or length > 72″ (ADA 405.8) |
When rise > 6″ or length > 72″ (CBC 11B-405.8) Same as ADA |
| Handrail Height | UNCHANGED | 34″-38″ above ramp surface (ADA 505.4) |
34″-38″ above ramp surface (CBC 11B-505.4) Same as ADA |
| Landing Size | UNCHANGED | 60″ × 60″ min Must equal ramp width (ADA 405.7) |
60″ × 60″ min Must equal ramp width (CBC 11B-405.7) Same as ADA |
| COUNTERS & WORK SURFACES | |||
| Sales/Service Counter Height | MORE STRINGENT | 36″ max height (ADA 904.4.1) |
34″ max height (CBC 11B-904.4.1) CA is 2″ lower (more accessible) |
| Sales Counter Length | UNCHANGED | 36″ min accessible length (ADA 904.4.1) |
36″ min accessible length (CBC 11B-904.4.1) Same as ADA |
| Check-out Counter Height | UNCHANGED | 38″ max (ADA 904.3.2) |
38″ max (CBC 11B-904.3.2) Same as ADA |
| Dining/Work Surface Height | UNCHANGED | 28″-34″ above floor (ADA 902.3) |
28″-34″ above floor (CBC 11B-902.3) Same as ADA |
| REACH RANGES | |||
| Forward Reach (Unobstructed) | UNCHANGED | 15″-48″ above floor (ADA 308.2.1) |
15″-48″ above floor (CBC 11B-308.2.1) Same as ADA |
| Side Reach (Unobstructed) | UNCHANGED | 15″-48″ above floor (ADA 308.3.1) |
15″-48″ above floor (CBC 11B-308.3.1) Same as ADA |
| Side Reach Over Obstruction | UNCHANGED | Max 34″ high obstruction Max 24″ deep Reach: 46″-48″ depending on depth (ADA 308.3.2) |
Same as ADA (CBC 11B-308.3.2) Same as ADA |
| TOILET & BATHING FACILITIES | |||
| Water Closet Centerline | UNCHANGED | 16″-18″ from side wall (ADA 604.2) |
16″-18″ from side wall (CBC 11B-604.2) Same as ADA |
| Water Closet Seat Height | UNCHANGED | 17″-19″ above floor (ADA 604.4) |
17″-19″ above floor (CBC 11B-604.4) Same as ADA |
| Grab Bar Diameter | UNCHANGED | 1-1/4″ to 2″ diameter (ADA 609.2.1) |
1-1/4″ to 2″ diameter (CBC 11B-609.2.1) Same as ADA |
| Grab Bar Wall Clearance | UNCHANGED | 1-1/2″ from wall (ADA 609.3) |
1-1/2″ from wall (CBC 11B-609.3) Same as ADA |
| Toilet Compartment (Wheelchair) – Minimum Size | UNCHANGED | 60″ wide × 59″ deep (wall-hung WC) 60″ wide × 56″ deep (floor-mounted WC) (ADA 604.8.1.1) |
Same dimensions as ADA (CBC 11B-604.8.1.1) Same as ADA |
| Ambulatory Compartment Size | UNCHANGED | 60″ deep × 35″-37″ wide (ADA 604.8.2.1) |
60″ deep × 35″-37″ wide (CBC 11B-604.8.2.1) Same as ADA |
| PATH OF TRAVEL (Alterations) | |||
| Alteration Trigger | MORE STRINGENT | Triggered when altering “primary function” area (ADA 202.4) |
Triggered by ANY alteration or addition Broader scope than ADA (CBC 11B-202.4) CA triggers more easily |
| Path of Travel Elements | UNCHANGED | Must upgrade: • Primary entrance • Toilets serving area • Drinking fountains • Telephones • Signs (ADA 202.4) |
Same list of elements (CBC 11B-202.4) Same as ADA |
| Disproportionality Threshold | UNCHANGED | 20% of alteration cost (ADA 202.4) |
20% of alteration cost (CBC 11B-202.4 Exception 8) Same 20% cap |
| Disproportionality Priority | UNCHANGED | Priority order: 1. Entrance 2. Route to area 3. Restrooms 4. Telephones 5. Drinking fountains 6. Other elements (ADA 202.4) |
Same priority order (CBC 11B-202.4 Exception 8) Same as ADA |
| DETECTABLE WARNINGS | |||
| Curb Ramp Requirement | UNCHANGED | Required at curb ramps (ADA 406.8) |
Required at curb ramps (CBC 11B-406.8) Same as ADA |
| Additional Locations | MORE STRINGENT | Limited to curb ramps and rail platforms (ADA 705) |
Required at MORE locations: • Curb ramps • Passenger loading zones • Hazardous vehicular areas • Reflecting pools • Rail platforms (CBC 11B-705) CA requires in more places |
| Truncated Dome Size | UNCHANGED | Diameter: 0.9″-0.95″ base Height: 0.2″ Spacing: 1.6″-2.4″ on center (ADA 705.1.2) |
Same dimensions as ADA (CBC 11B-705.1.2) Same as ADA |
| SIGNAGE | |||
| Tactile Character Height | UNCHANGED | 5/8″-2″ high (ADA 703.2.3) |
5/8″-2″ high (CBC 11B-703.2.3) Same as ADA |
| Mounting Height (Tactile) | UNCHANGED | 48″-60″ above floor to baseline of lowest character (ADA 703.4.1) |
48″-60″ above floor to baseline of lowest character (CBC 11B-703.4.1) Same as ADA |
| Braille Required | UNCHANGED | Grade 2 Braille Below corresponding characters (ADA 703.3) |
Grade 2 Braille Below corresponding characters (CBC 11B-703.3) Same as ADA |
| ELEVATORS | |||
| Car Size (Center Opening) | UNCHANGED | 80″ wide × 51″ deep minimum (ADA 407.4.1) |
80″ wide × 51″ deep minimum (CBC 11B-407.4.1) Same as ADA |
| Door Clear Width | UNCHANGED | 36″ min clear opening (ADA 407.3.6) |
36″ min clear opening (CBC 11B-407.3.6) Same as ADA |
| Button Height | UNCHANGED | Car controls: 48″ max for side reach (ADA 407.4.6.1) |
Car controls: 48″ max for side reach (CBC 11B-407.4.6.1) Same as ADA |
| MULTIFAMILY HOUSING (Chapter 11A – CA SPECIFIC) | |||
| Application Scope | CA SPECIFIC | Fair Housing Act applies to multifamily (4+ units with elevator, or all ground floor units) (Federal FHA) |
Chapter 11A applies to: • 3+ apartments • 4+ condos • 3+ congregate residence units Broader than FHA (CBC 11A-1101A.1) CA covers more unit types earlier |
| Type A vs Type B Units | CA SPECIFIC | FHA has 7 design features (Not labeled as Type A/B) |
Type A: Fully accessible (mobility + adaptability) Type B: Basic accessibility (7 features + more) Structured framework (CBC 11A-1105A) CA has specific unit type categories |
| Door Hardware (Housing) | CA SPECIFIC | Lever hardware not specifically required in FHA baseline | Lever hardware required Height: 30″-44″ above floor (CBC 11A-1132A.8) CA specifically requires levers |
| Kitchen Counter Height | CA SPECIFIC | Not specified in baseline FHA | Type A units: Removable base cabinets OR adjustable height counters (CBC 11A-1133A.3) CA addresses kitchen accessibility |
Critical Notes for California Practice
- Compliance Standard: When California and ADA differ, BOTH must be met. California controls for state projects, but ADA always applies federally to public accommodations and commercial facilities.
- DSA vs. HCD: Chapter 11B (DSA-AC) covers public buildings, commercial, and public housing. Chapter 11A (HCD) covers covered multifamily dwellings. Some public housing must meet both.
- Local Amendments: Cities/counties may add requirements beyond state minimum – always verify local amendments.
- CSE Exam Strategy: Focus on differences (parking dimensions, counter heights, path of travel triggers, detectable warning locations). Questions often test “which is more restrictive?”
- Healthcare Impact: OSHPD requirements typically exceed both CBC 11B and ADA – healthcare facilities have additional stringent requirements.
Design Professional Quick Reference
When California is MORE stringent than ADA:
- Parking space widths (+12″ for both car and van)
- Sales/service counter heights (34″ vs 36″)
- Path of travel triggers (broader in alterations)
- Detectable warnings (more locations required)
- Multifamily housing scope (starts at 3 units vs 4)
- Access aisle marking (specific color requirements)
When requirements are IDENTICAL: Most technical dimensions match (door widths, grab bars, reach ranges, ramp slopes, toilet clearances)
Document Information
Sources:
- California Building Code 2025 Edition – Chapter 11A (Housing Accessibility)
- California Building Code 2025 Edition – Chapter 11B (Public Buildings, Public Accommodations, Commercial Buildings, and Public Housing)
- ADA 2010 Standards for Accessible Design (U.S. Department of Justice)
- ADA Guidance on 2010 Standards
Prepared: October 2025
Purpose: CSE Exam Preparation & Professional Practice Reference for California Design Professionals
Note: This crosswalk addresses most common elements. Always consult actual code sections for project-specific requirements. Both California CBC and federal ADA must be satisfied in practice.