Accessible Parking Spaces: Dimensions, Signage, and Minimums

ADA accessible parking requirements come from the 2010 ADA Standards for Accessible Design, which tell every business, nonprofit, and government entity how many accessible spaces to provide, how to size and mark them, and where to put them. Get any of those wrong and civil penalties reach $118,225 for a first violation and $236,451 for repeat violations.¹ The rules are specific but not complicated once you work through them lot by lot.

How Many Accessible Spaces You Need

The minimum count runs on a sliding scale tied to the total spaces in each parking facility:

1–25 total spaces: 1 accessible
26–50: 2
51–75: 3
76–100: 4
101–150: 5
151–200: 6
201–300: 7
301–400: 8
401–500: 9
501–1,000: 2 percent of the total
1,001 and over: 20, plus 1 for every 100 (or fraction of 100) above 1,000

At least one of every six accessible spaces has to be van-accessible.² Count each lot or garage on its own; you cannot pool spaces across a whole site to hit the minimum in one place.³

The rules apply the same way to employee-only or otherwise restricted parking as they do to customer lots. A staff lot with 80 spaces still needs four accessible ones.⁴

Sites With Four or Fewer Total Spaces

Even a tiny lot needs one accessible space, sized to full standards and van-accessible.² The one break: that space does not need to carry a reserved-parking sign.⁴

Medical Facilities Have Higher Minimums

If your facility is a hospital outpatient site, the scoping table doesn’t apply. At least 10 percent of patient and visitor spaces must be accessible.³ Rehabilitation facilities that specialize in conditions affecting mobility, and outpatient physical therapy facilities, go higher: 20 percent.⁴ General rehab centers that don’t specialize in mobility conditions stay on the standard table.

Space and Access Aisle Dimensions

Every accessible space has two parts: the parking space and a striped access aisle beside it. The aisle is where a door swings wide, a ramp deploys, or someone transfers into a wheelchair. Skimping on the aisle undoes the space.

Car-Accessible Spaces

A car space is at least 96 inches (8 feet) wide with an adjacent access aisle at least 60 inches (5 feet) wide.⁵ The aisle runs the full length of the space and must be marked so nobody parks in it.⁶

Van-Accessible Spaces

Vans with side-entry ramps need more room. You have two ways to build the space:

A 132-inch (11-foot) wide space with a 60-inch (5-foot) access aisle, or
A 96-inch (8-foot) wide space with a 96-inch (8-foot) access aisle.

Both add up to the same clearance. The wider-aisle option often works better when restriping an existing lot where widening the stall itself isn’t practical.⁶ The van space, and the vehicle route leading to it, must provide at least 98 inches of vertical clearance.⁵

Shared Aisles and Slope

Two adjacent spaces can share a single access aisle between them. Angled spaces cannot share, and the aisle has to sit on the passenger side.²

The space and the aisle both have to be essentially level. Slope cannot exceed 1:48 in any direction, or about a quarter inch of rise per foot.⁵ A wheelchair on a sloped surface can roll during a transfer. Drainage slopes are a frequent failure point on inspection, because grades that looked fine at construction shift over time.

Signage

Each accessible space needs a sign showing the International Symbol of Accessibility, mounted so the bottom of the sign sits at least 60 inches above the ground. Van-accessible spaces need a second sign below it reading “van accessible.”⁵ The mounted sign is what the standard requires. Painted pavement symbols help drivers spot the space but do not substitute for it.

Lots with four or fewer total spaces skip the sign requirement, but the space itself still has to meet every dimensional and design standard.⁴ Replace faded or damaged signs. An unreadable sign will not pass.

Location and the Route to the Entrance

Accessible spaces have to sit on the shortest accessible route to the building’s accessible entrance.² “Shortest” is measured against the other spaces in that same lot, not as an absolute distance. If the building has more than one accessible entrance, spread the accessible spaces so each entrance has some nearby.⁴ When there are more accessible entrances than accessible spaces required, you don’t have to add extras beyond the minimum.

The route from the space to the door has to be free of stairs, abrupt level changes, and obstacles. Slopes along the route cannot exceed 1:20 (5 percent) unless the path is built as a ramp with handrails. A width of at least 36 inches lets mobility devices pass comfortably. In multi-level garages, put the accessible spaces near elevators or ramps so the whole trip stays step-free.

Maintenance counts. Snow piled into the space or across the aisle takes the space out of service. So do overgrown landscaping, debris, and ice. Keep the route clear and usable whenever the facility is open.

Passenger Loading Zones and Valet Parking

If your facility has a passenger loading zone for drop-offs, at least one of them has to be accessible. The vehicle pull-up space is at least 96 inches wide and 20 feet long, with a marked access aisle at least 60 inches wide running the full length of the pull-up area. The aisle has to sit level with the pull-up space and connect to an accessible route into the building.⁷

Offering valet parking does not replace the requirement for accessible self-parking. Someone who cannot hand off their vehicle must still be able to park independently. The valet operation itself also needs an accessible passenger loading zone. A business that has no parking spaces at all and uses off-site valet does not have to create on-site accessible spaces, but still has to accommodate customers with disabilities through its policies.

Existing Buildings and Alterations

These standards are not limited to new construction. Under Title III of the ADA, a private business open to the public has to remove architectural barriers in existing facilities when doing so is “readily achievable,” meaning it can be done without significant difficulty or expense. Adding or restriping accessible spaces is one of the most common ways to meet that obligation.⁸

When you alter a facility, the altered elements have to meet the current standards. If an alteration cuts the total space count, the accessible count can shrink proportionately, but only down to the minimum the new total requires. Alterations cannot drop accessibility below what new construction would require. Altering an area containing a primary function also triggers a requirement to provide an accessible path of travel from that area to the entrance.⁸

State and local government facilities have a parallel obligation under Title II to ensure program access, and the 2010 Standards serve as the benchmark when physical changes are needed to meet it.

Penalties and Complaints

Federal civil penalties for a Title III violation reach $118,225 for a first offense and $236,451 for each subsequent one. The figures are adjusted annually for inflation, and the current amounts took effect July 3, 2025.¹ On top of federal penalties, private individuals can sue for injunctive relief — a court order making the property fix the violation — and in some jurisdictions for damages.

Anyone can file a complaint with the U.S. Department of Justice, Civil Rights Division, online or by mail to 950 Pennsylvania Avenue NW, Washington, DC 20530. The Department takes up to three months to review, and will not disclose the complainant’s identity unless necessary for enforcement or required by law.⁹ A complainant who has not heard back within that window can check status through the ADA Information Line at 800-514-0301.

1
Federal Register. Civil Monetary Penalties Inflation Adjustments for 2025
2
ADA.gov. Accessible Parking Spaces
3
U.S. Access Board. Chapter 2 – Scoping Requirements
4
U.S. Access Board. Guide to the ADA Accessibility Standards – Parking Spaces
5
U.S. Access Board. Americans with Disabilities Act – Chapter 5 General Site and Building Elements
6
ADA.gov. ADA Compliance Brief – Restriping Parking Spaces
7
U.S. Access Board. Passenger Loading Zones
8
U.S. Access Board. Chapter 2 – Alterations and Additions
9
ADA.gov. File a Complaint