ADA Parking Lot Compliance in Tualatin, Oregon: 2026 Guide

ADA Parking Compliance for Tualatin Property Owners

Tualatin sits where I-5 meets I-205 in the southern Portland metro, a position that has made it a hub for both upscale retail — think the Bridgeport Village and Nyberg Woods centers — and a deep base of industrial and distribution properties. That mix gives Tualatin an unusually wide range of parking lots, from polished destination retail to large warehouse and employee lots. For Washington County property owners, ADA compliance under the 2010 ADA Standards and Oregon's ORS 447.233 is a legal duty across all of them.

This guide gives Tualatin 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 Tualatin context.

How Many Accessible Spaces a Tualatin 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 two for 26–50, three for 51–75, four for 76–100, five for 101–150, and up. A 90-space office lot needs four accessible stalls; a large Bridgeport-area retail lot of 400 needs eight.

At least one in six accessible spaces (rounded up) must be van-accessible, and that van ratio matters especially on Tualatin's industrial and distribution lots, where larger vehicles and shuttle traffic are common. Our guide to how many accessible spaces your lot needs lays out the full table.

Stall Dimensions, Access Aisles, and Slope

Three numbers define accessible-parking geometry in Tualatin:

• 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.

Tualatin sits low in the flat Tualatin River valley, which generally works in favor of slope compliance — the terrain is gentle. The wrinkle is drainage: low-lying lots near the river can pond water, and standing water in an accessible stall or aisle signals a slope or grading problem and creates a barrier for wheelchair users. On-site measurement, ideally during or just after rain, confirms both slope and drainage.

Signage: The Oregon Fine Plate

Every accessible space in Tualatin 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 Tualatin 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 Tualatin's Climate

Tualatin 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. Tualatin's high-volume retail lots add heavy tire wear on top of weather fade, while its industrial lots see truck and trailer traffic that grinds at markings in different ways.

The low-valley location makes drainage and ponding a recurring issue. Standing water in accessible areas is both a slope-compliance flag and a freeze hazard in winter, when ponded water turns to ice along accessible routes. Cracks wider than half an inch and abrupt level changes over a quarter inch in an accessible stall or route are compliance issues. For Tualatin owners, the practical rhythm is to inspect accessible markings and drainage each spring after the wet season and re-stripe before the symbols fade, scheduling the repaint 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 Tualatin's drainage-challenged lots, a repave is often the right time to correct grading and ponding alongside the accessible counts, aisles, and slopes.

Getting Compliant in Tualatin

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 or ponding accessible areas, and repairing surface defects on accessible routes. What your lot needs depends on what it measures today, which is why a site survey beats a generic checklist.

Cojo Excavation & Asphalt serves commercial and industrial properties throughout Tualatin, Tigard, and the I-5 corridor. We can assess your layout, document the gaps, and build a compliant plan. See our Tualatin parking lot striping guide for the marking side, learn about our professional striping services, or request a free quote.