Seasonal
ADA Parking Lot Compliance Guide for Oregon Businesses
Cojo
March 6, 2026
11 min read
The Americans with Disabilities Act requires that commercial parking lots provide accessible parking for people with disabilities. In Oregon, state accessibility requirements complement and sometimes exceed federal ADA standards. For business and property owners, understanding and meeting these requirements is both a legal obligation and a practical necessity.
Non-compliance exposes you to significant liability. Federal fines, private lawsuits, and state enforcement actions can be costly and damaging to your business reputation. More importantly, accessible parking directly impacts your ability to serve customers, employees, and visitors with disabilities.
This guide covers the essential ADA parking lot requirements that Oregon business owners need to understand, whether you are building a new lot, repaving an existing one, or simply ensuring your current lot is compliant.
The number of accessible parking spaces you must provide is based on your total lot capacity.
| Total Parking Spaces | Required Accessible Spaces | Van-Accessible Minimum |
|---|---|---|
| 1-25 | 1 | 1 |
| 26-50 | 2 | 1 |
| 51-75 | 3 | 1 |
| 76-100 | 4 | 1 |
| 101-150 | 5 | 1 |
| 151-200 | 6 | 1 |
| 201-300 | 7 | 2 |
| 301-400 | 8 | 2 |
| 401-500 | 9 | 2 |
| 501-1000 | 2% of total | 1 per 6 accessible |
| Over 1000 | 20 + 1 per 100 over 1000 | 1 per 6 accessible |
Medical facilities: Outpatient medical facilities require 10 percent of total spaces to be accessible. Rehabilitation and outpatient physical therapy facilities require 20 percent.
Van-accessible spaces accommodate vehicles with wheelchair lifts or ramps that deploy from the side.
Option 1: 8-foot space with 8-foot access aisle (total 16 feet) Option 2: 11-foot space with 5-foot access aisle (total 16 feet) Vertical clearance: Minimum 98 inches (8 feet 2 inches) at the space, access aisle, and along the vehicle route to and from the space
Access aisles provide space for wheelchair users and people with mobility devices to enter and exit vehicles.
Accessible spaces must be located on the shortest accessible route to the building entrance they serve. If a parking lot serves multiple buildings or entrances, accessible spaces should be distributed to provide the shortest route to each.
For parking structures with multiple levels, accessible spaces should be on the level closest to the accessible building entrance. If elevators connect levels to the entrance, accessible spaces must be on a level served by an elevator.
ADA compliance is not just about design. It extends to ongoing surface maintenance. This is where many Oregon parking lots fall short, particularly after winter damage.
Level changes: No abrupt level changes greater than one-quarter inch along accessible routes. Level changes between one-quarter inch and one-half inch must be beveled at 1:2 slope. Changes greater than one-half inch must be addressed with a ramp.
Cracks and gaps: Cracks wider than one-half inch in accessible parking spaces, access aisles, and accessible routes create potential trip hazards and may violate accessibility standards.
Potholes: Any pothole in an accessible space, access aisle, or accessible route is a compliance violation and safety hazard. These require immediate repair.
Standing water: Ponding water in accessible spaces and aisles indicates slope non-compliance and creates barriers for wheelchair users. Proper grading is essential.
Surface texture: The surface must remain firm, stable, and slip-resistant. Severely deteriorated asphalt with loose aggregate or crumbling surfaces may not meet this standard.
Oregon's freeze-thaw cycles create particular challenges for ADA surface maintenance. Potholes, heaving, and crack deterioration that develop during winter can push accessible areas out of compliance by spring.
Best practices:
Each accessible space must have a vertical sign featuring the International Symbol of Accessibility (the wheelchair symbol). Signs must be:
Van-accessible spaces must include an additional sign stating "Van Accessible" mounted below the accessibility symbol.
While not strictly required by federal ADA standards, Oregon and most jurisdictions require painted ground markings:
Oregon's rainy season and UV exposure fade parking lot paint relatively quickly. Inspect striping at least annually and repaint when markings become difficult to see. Faded or missing accessible parking markings can be considered a compliance violation.
Understanding when ADA upgrades are required helps you budget accurately for paving projects.
Under ADA, when you make an alteration to a facility, you must make the path of travel to the altered area accessible. Alterations include:
The 20 percent rule: You must spend up to 20 percent of the alteration cost on accessibility improvements if the existing path of travel is not fully accessible. For a $50,000 repaving project, up to $10,000 must be allocated to accessibility improvements.
Routine maintenance does not trigger ADA upgrade requirements:
However, even during maintenance, you cannot make the facility less accessible than it currently is.
Oregon's accessibility code (Oregon Structural Specialty Code Chapter 11) may impose additional requirements beyond federal ADA standards. Consult with your local building department for Oregon-specific obligations.
One of the most common issues, particularly in lots built on Oregon's sloped terrain. Accessible spaces and aisles must not exceed 2 percent slope. Over time, settlement and ground movement can push originally compliant slopes out of tolerance.
Solution: Professional surveying to verify slopes, followed by regrading and repaving of non-compliant areas.
Many older lots were built before van-accessible requirements were established or have not been updated to reflect current ratios.
Solution: Convert existing accessible spaces to van-accessible dimensions. This may require restriping or widening access aisles.
Oregon winters take a toll on pavement surfaces. Potholes, wide cracks, and heaved sections in accessible areas create trip hazards and barriers.
Solution: Prioritize accessible areas in your seasonal maintenance plan. Address surface issues before they become compliance violations.
Signs that are too low, damaged, faded, or missing are common compliance gaps.
Solution: Install compliant signs at 60 inches minimum height with the International Symbol of Accessibility. Add "Van Accessible" signs to designated van-accessible spaces.
Shopping carts, snow berms, delivery vehicles, and debris in access aisles prevent their use by people with disabilities.
Solution: Regular monitoring and enforcement. Train staff to keep access aisles clear. Position cart corrals away from accessible spaces.
For new parking lot construction, ADA compliance is built into the design from the start. Additional costs are minimal because accessible features are incorporated into the base design.
Bringing an existing non-compliant lot into compliance involves:
The cost of compliance is modest compared to the cost of violations:
Cojo Excavation and Asphalt has experience with ADA-compliant parking lot construction and rehabilitation projects throughout Oregon's I-5 corridor. We understand the grading, surface, and design requirements that ensure your parking lot meets accessibility standards.
View examples of our commercial parking lot work on our commercial projects page, or contact us at 541-409-9848 to discuss your ADA compliance needs. Our team can assess your current lot and provide a plan to address any compliance gaps.
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