ADA Parking Lot Compliance in Hillsboro, Oregon: 2026 Guide

ADA Parking Compliance for Hillsboro Property Owners

Hillsboro is the heart of Oregon's Silicon Forest, and its parking landscape runs from sprawling corporate tech campuses to the Tanasbourne retail district, the Orenco Station mixed-use core, and the older downtown grid. For Washington County property owners, ADA compliance under the 2010 ADA Standards and Oregon's ORS 447.233 is a legal duty — and the city's large-employer culture means accessibility is often watched closely, both by employees and by the public visiting service and retail properties.

This guide gives Hillsboro building owners and property managers a practical overview of what compliance requires on the pavement. The statewide framework lives in our Oregon ADA parking compliance pillar; this page puts it in a Hillsboro context.

How Many Accessible Spaces a Hillsboro Lot Needs

Your accessible-space count is driven by the lot total. The 2010 ADA Standards require one accessible space for the first 25, then scale: two for 26–50, three for 51–75, four for 76–100, five for 101–150, six for 151–200, and up. Hillsboro's large tech-campus lots push into the higher tiers — a 500-space employee lot needs nine accessible spaces, and lots over 500 shift to a percentage formula.

At least one in six accessible spaces (rounded up) must be van-accessible, with a higher van ratio kicking in on the largest lots. Our guide to how many accessible spaces your lot needs lays out the full table, including the large-lot rules that matter for Hillsboro's corporate campuses.

Stall Dimensions, Access Aisles, and Slope

Three numbers define accessible-parking geometry in Hillsboro:

• Standard accessible stall: at least 8 feet wide with a 5-foot access aisle.
• Van-accessible stall: 8 feet wide with an 8-foot access aisle (or 11 feet with a 5-foot aisle), plus 96-inch vertical clearance along the van route.
• Slope: no more than 2 percent in any direction across stalls and aisles.

Hillsboro sits on the flat Tualatin Valley floor, so it largely avoids the slope problems of hillier cities — an advantage for compliance. The bigger challenge on large Hillsboro campus lots is distribution: accessible spaces must serve the shortest accessible route to each building entrance, which on a multi-building tech campus means spreading accessible stalls across several entry points rather than concentrating them. On-site review confirms both slope and distribution.

Signage: The Oregon Fine Plate

Every accessible space in Hillsboro needs a vertical sign with the International Symbol of Accessibility mounted at least 60 inches above the pavement to the bottom, plus a "Van Accessible" plate on van stalls. Oregon also requires a supplemental sign stating the fine for unauthorized parking — a step most states skip. A Hillsboro lot with the wheelchair sign but no fine plate still falls short of ORS 447.233. Our ADA parking sign requirements guide covers the mounting and wording.

Surface Condition and Hillsboro's Climate

Hillsboro shares the wet Tualatin Valley climate, and persistent rain plus summer UV fade water-based parking paint quickly — the blue borders and the wheelchair symbol lose contrast within a couple of seasons, and a faded marking can itself be a violation. On large campus lots, that fade is easy to overlook simply because of the acreage involved; markings in far corners of an employee lot can deteriorate unnoticed.

Winter freeze-thaw movement opens cracks and creates the small level changes that become trip hazards along accessible routes. Cracks wider than half an inch and abrupt changes over a quarter inch in an accessible stall or route are compliance issues. For Hillsboro owners, especially those managing large campuses, the practical step is a systematic spring inspection of every accessible area — not just the ones near the front door — followed by restriping before symbols fade out, scheduled for the drier summer.

When Repaving Triggers Upgrades

Routine maintenance — sealcoating, crack sealing, patching, refreshing existing lines — does not trigger new ADA obligations, but you can never make a lot less accessible than it currently is. A full repave, regrade, or expansion is an "alteration" that triggers the duty to bring the path of travel up to current standards to the maximum extent feasible. On Hillsboro's phased campus repaves, each section that gets reworked is a chance to bring its accessible stalls, aisles, and routes fully up to code.

Getting Compliant in Hillsboro

For most Washington County lots, compliance combines restriping to a correct layout, installing or correcting signage with the Oregon fine plate, regrading any over-sloped accessible areas, and repairing surface defects on accessible routes. On large campuses, the added task is making sure accessible parking is properly distributed across entrances. A site survey tells you exactly what your lot needs.

Cojo Excavation & Asphalt serves commercial properties throughout Hillsboro, Beaverton, and the Washington County tech corridor. We can assess your layout, document the gaps, and build a compliant plan. See our Hillsboro parking lot striping guide for the marking side, learn about our professional striping services, or request a free quote.