Quick answer
ADA Title III requires NYC commercial curb cuts to be at least 36 inches wide, sloped no steeper than 1:12 (8.33%), with counter slopes under 1:20, and include a truncated-dome detectable warning strip 24 inches deep across the full width. Non-compliance risks DOJ enforcement, private ADA lawsuits, and DOT violations.
ADA compliance is federal law, not city preference, and the Department of Justice does enforce it against NYC commercial property. A single non-compliant curb cut can trigger a demand letter, a private lawsuit, and a DOT violation simultaneously. The compliance spec is precise, well-documented, and cheaper to build to than to litigate over.
The three ADA curb cut dimensions
Minimum 36-inch clear width. Running slope no steeper than 1:12 (8.33%) — a 6-inch curb needs a 72-inch ramp minimum. Counter slope on the adjoining street no steeper than 1:20 (5%). Flares on either side (where used) no steeper than 1:10.
Detectable warning strips — the truncated domes
A 24-inch-deep strip of truncated-dome detectable warning material must span the full width of the curb cut, contrasting visually with adjacent surfaces (typically yellow or dark red). Cast-in-place, replaceable panels, or wet-set are all ADA-compliant if installed correctly.
DOJ enforcement and private lawsuits
The DOJ can bring a Title III enforcement action, and disability-rights firms bring hundreds of NYC private ADA suits per year. Suits typically resolve for $8,000–$25,000 in damages and fees plus the required repair — usually more than the compliant construction cost.
DOT permit stack for a new curb cut
New commercial curb cut: full Curb Cut Permit (3–8 weeks) plus DOT Construction Permit for the pour. Existing curb cut brought into ADA compliance: Construction Permit only. LPC review layers on for historic district properties.
Typical NYC ADA curb cut cost in 2026
New ADA-compliant curb cut with detectable warning strip: $2,400–$3,800 per corner depending on width and finish. Retrofit of an existing curb cut: $1,600–$2,600. Both include DOT permit.
In 100 words
ADA Title III applies to NYC commercial property, and the Department of Justice actively enforces it alongside a busy private plaintiffs' bar. Compliant curb cuts must be at least 36 inches wide, sloped no steeper than 1:12 running with a 1:20 counter slope, and include a 24-inch-deep truncated-dome detectable warning strip across the full width. A DOJ enforcement action or private ADA suit routinely resolves at $8,000–$25,000 in damages plus the required construction — more than pouring compliant from the start. New ADA curb cuts cost $2,400–$3,800 per corner in 2026; retrofits $1,600–$2,600. Historic districts add LPC review.
Frequently asked questions
- How wide does an ADA curb cut have to be?
- Minimum 36 inches of clear width.
- What is the maximum slope for an ADA curb cut?
- 1:12 running slope (8.33%) and 1:20 counter slope (5%).
- Do I need detectable warning strips?
- Yes. A 24-inch-deep truncated-dome strip must span the full width of the curb cut.
- How much does an ADA-compliant curb cut cost in NYC?
- $2,400–$3,800 per corner for new construction; $1,600–$2,600 for retrofit.
Ready to close your DOT violation or get a written estimate?
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