Permits, Environmental & Compliance

ADA Site Accessibility Compliance

Survey and design of accessible parking, ramps, curb ramps and routes to meet the 2010 ADA Standards. Typical US fees run $1,500 to $15,000 per site, and most projects take 2 to 6 weeks. Our drawings, calculations and reports are sealed by a Professional Engineer (PE) licensed in the state where your project is located, ready for permit submission.

Typical US fee$1,500 to $15,000per site

Typical timeline2 to 6 weeks

Permit drawingsSealed by a PE

What the work involves

Civil engineers evaluate and design the site portion of accessibility: accessible parking and van spaces, curb ramps, slopes along accessible routes, landings, and connections from parking and public sidewalks to entrances. The work often starts with a slope survey and barrier report and ends with redesign drawings. Accessibility lawsuits frequently target parking lots and routes, so owners commission audits proactively.

When you need it

Received an ADA demand letter or lawsuit
Repaving or restriping a parking lot
New construction or alteration
Public agency transition plan for sidewalks and curb ramps

What you receive

Accessibility site survey
Barrier report
Redesign plans
Construction observation

What drives the cost

Estimate. A single small lot audit is at the low end; multi-building campuses and redesign with construction observation cost more.

Related calculators

Slope and Grade Percent CalculatorConvert rise and run into percent grade, angle in degrees and slope ratio (run:rise) for ramps, driveways and site grading.

Frequently asked questions

How much does aDA Site Accessibility Compliance cost?

Across the US, aDA Site Accessibility Compliance usually costs $1,500 to $15,000 per site. Estimate. A single small lot audit is at the low end; multi-building campuses and redesign with construction observation cost more.

How long does aDA Site Accessibility Compliance take?

Plan on 2 to 6 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.

Do I need a licensed PE for aDA Site Accessibility Compliance?

In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.

Will I also need a accessibility consultant (CASp in California)?

Sometimes. Depending on the site, aDA Site Accessibility Compliance can also involve a accessibility consultant (CASp in California), architect or land surveyor. We tell you up front which other professionals your project needs and coordinate with them so the drawings agree.

Who do you provide aDA Site Accessibility Compliance for?

Most of our clients for this service are business owners, municipalitys, developers and attorneys. Describe your project and one of our engineers will reply with scope, fee and schedule.

How many accessible parking spaces do I need?

The 2010 ADA Standards set the minimum based on total spaces, and at least one of every six accessible spaces must be van accessible. Some building types, such as medical facilities, have higher requirements.

What is the maximum slope of an accessible route?

Generally 1:20 (5%) running slope for a walking surface; steeper sections are ramps limited to 1:12 with handrails and landings, and cross slope is limited to 1:48. Accessible parking spaces and access aisles are limited to 1:48 slope in all directions.

Does restriping trigger ADA requirements?

Restriping and resurfacing are alterations and can trigger requirements to provide compliant accessible parking. Consult the ADA Standards and your attorney for your specific situation.

Is a civil engineer the right professional?

For site routes, parking and curb ramps, yes. Buildings interiors are usually handled by architects or accessibility specialists.