Arizona handicap parking space requirements come from two overlapping rulebooks: the federal 2010 ADA Standards for Accessible Design and Arizona Revised Statutes Title 28. Where the two differ, the stricter rule controls. For property owners, that means getting the count, the striping, the signage, and the route to the entrance all right at the same time. Miss any of them and you can face federal civil penalties above $100,000 per violation.
How Many Accessible Spaces a Lot Needs
The number of accessible spaces scales with the size of the lot under the 2010 ADA Standards:
- 1–25 total spaces: 1 accessible space
- 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 spaces plus 1 for every 100 (or fraction of 100) beyond 1,000
At least one out of every six accessible spaces, or fraction of six, must be van-accessible. If the lot only requires a single accessible space, that space has to be the van-accessible type.2United States Access Board. Guide to the ADA Accessibility Standards – Chapter 5 Parking Spaces
Medical Facilities Need More
Hospital outpatient lots must designate 10 percent of patient and visitor spaces as accessible. Rehabilitation facilities and outpatient physical therapy facilities must designate 20 percent. The one-in-six van ratio still applies on top of those higher totals.3ADA.gov. Accessible Parking Spaces
Space and Access Aisle Dimensions
Every accessible space needs a striped access aisle beside it. The aisle is what gives someone room to open a door fully, deploy a ramp, or use a side-mounted lift.
A car-accessible space must be at least 96 inches (8 feet) wide, paired with an access aisle at least 60 inches (5 feet) wide.4ADA.gov. 2010 ADA Standards for Accessible Design Van spaces come in two allowable configurations:
- 132-inch (11-foot) space with a 60-inch (5-foot) aisle, or
- 96-inch (8-foot) space with a 96-inch (8-foot) aisle.3ADA.gov. Accessible Parking Spaces
Two adjacent spaces can share one access aisle to save room.4ADA.gov. 2010 ADA Standards for Accessible Design The aisle runs the full length of the space, sits level with it, and has no slope steeper than 1:48 (roughly 2 percent) in any direction. The space itself carries the same slope limit.
Vertical Clearance in Garages
Van-accessible spaces inside garages or under any covered structure need at least 98 inches of vertical clearance. That clearance has to hold not only over the space and aisle but along the entire vehicle route from the entrance to the space and back out to the exit. It’s one of the most-missed items in garage design, and getting it wrong makes the van spaces unusable no matter how well they’re striped.3ADA.gov. Accessible Parking Spaces
Signs: Where Federal and Arizona Rules Stack
Federal standards require a vertical sign displaying the International Symbol of Accessibility (ISA), with the bottom edge of the sign at least 60 inches above the ground. Van spaces need a second sign below the ISA reading “Van Accessible.”1ADA.gov. ADA Compliance Brief – Restriping Parking Spaces
Arizona adds more. ARS 28-882 says each accessible space must be prominently outlined with paint and posted with a permanent sign mounted between three and six feet above grade. The sign must show the ISA and carry the caption “reserved parking.”5Arizona Legislature. Arizona Revised Statutes 28-882 – Parking Spaces for Persons With Physical Disabilities Because the federal floor is 5 feet and the state ceiling is 6 feet, the workable mounting height in Arizona is 5 to 6 feet above grade.
One narrow break: if a facility has four or fewer total spaces, the accessible space does not need a sign reserving it for people with disabilities. Every other requirement, including aisle dimensions and access route, still applies.2United States Access Board. Guide to the ADA Accessibility Standards – Chapter 5 Parking Spaces
Aisles have to be striped so drivers know not to park in them. Diagonal or cross-hatched striping is standard, and many owners paint the ISA on the pavement as well. The vertical sign is the legal anchor, but faded pavement paint invites encroachment and is worth refreshing.
Location and Route to the Entrance
Accessible spaces must sit along the shortest accessible route to the accessible entrance. An accessible route is a continuous path with no steps, abrupt level changes, or obstructions. When a building has more than one accessible entrance, the accessible spaces should be spread among them rather than piled at one, unless a single cluster near the main entrance actually gives the shortest route to every entrance served.2United States Access Board. Guide to the ADA Accessibility Standards – Chapter 5 Parking Spaces
The route also can’t force a wheelchair user to travel behind parked cars, where backing drivers can’t see them. Ramps or elevators have to bridge any elevation change along the path. Access aisles cannot overlap vehicle travel lanes and must connect directly into the accessible route.4ADA.gov. 2010 ADA Standards for Accessible Design
Passenger Loading Zones
If the facility has a passenger loading zone, at least one accessible loading zone is required for every 100 linear feet, or fraction of that, of loading zone space. The pull-up area must be at least 96 inches wide and 20 feet long, with an access aisle at least 60 inches wide running its full length. Vertical clearance of 114 inches is required over the pull-up space, the aisle, and the vehicle route feeding them.6U.S. Access Board. Chapter 5: Passenger Loading Zones
What Noncompliance Costs the Property Owner
The Department of Justice enforces ADA Title III against places of public accommodation. As of the July 2025 inflation adjustment, the maximum civil penalty is $118,225 for a first violation and $236,451 for each subsequent violation.7eCFR. 28 CFR Part 85 – Civil Monetary Penalties Inflation Adjustment These apply across the full range of parking failures: too few spaces, wrong dimensions, missing or misplaced signage. The DOJ can also seek an injunction ordering the owner to bring the lot into compliance.8eCFR. 28 CFR 36.504
Driver-side violations, such as a car without a valid placard sitting in an accessible space or in an access aisle, are handled separately as Arizona civil traffic infractions with fines that vary by jurisdiction. Property owners are not on the hook for those; the driver is.
Safe Harbor for Older Lots
A lot built to the 1991 ADA Standards does not automatically have to be reworked to the 2010 Standards. That “safe harbor” means an existing compliant lot doesn’t need to add van spaces or restripe just because the newer ratios differ.
The protection ends the moment a planned alteration happens: restriping, resurfacing, or reconfiguration. After the alteration, the lot has to meet the 2010 Standards. Lots that never complied with the 1991 Standards get no safe harbor and must be brought up to the 2010 Standards whenever doing so is readily achievable, a test that looks at the cost and difficulty of the changes against the business’s size and resources.