A medical office building (MOB) in Hillsboro operates under federal ADA accessibility obligations, with the local healthcare-system context shaped by the Tuality, Kaiser Westside, and OHSU Hillsboro affiliated MOBs plus the larger private MOB cluster serving the Silicon Forest workforce. The 2010 ADA Standards for Accessible Design, Section 406, set the slope, width, landing, and detectable-warning requirements for every curb ramp on an accessible route. Cojo installs ADA-compliant curb ramps at Hillsboro Washington County MOBs, and this guide explains how to scope the work so the project closes inside the after-hours window.
ADA 2010 Section 406, the Plain-Language Spec
Section 406 sets a running slope of 1:12 maximum (8.33 percent), a cross slope of 1:48 maximum (2.08 percent), a ramp width of 36 inches minimum, and a level landing at the top of the ramp at least 36 by 36 inches. Flare slopes on the sides where they transition to the adjacent walking surface are limited to 1:10 (10 percent) maximum. Detectable warning surfaces (truncated domes) are required at the bottom of every ramp meeting a vehicular route -- they extend the full ramp width and 24 inches deep in the direction of travel.
The most common Hillsboro MOB compliance failure is cross-slope drift on ramps installed before 2010. A digital-level field measurement during the inventory walk catches this before the ADA demand letter. See ADA curb ramp slope requirements for the field protocol.
Hillsboro MOB Operating Constraints
Patient-access continuity drives every Hillsboro MOB ADA scope. The MOB cannot detour patients away from accessible entrances during business hours; the contractor works after-hours or schedules around clinic-day-off windows. Tuality Healthcare, Kaiser Westside, and OHSU Hillsboro affiliated MOBs all run 24/7 emergency or urgent-care operations on some campuses, which adds ambulance-access-lane constraints to any ramp affecting those routes.
Washington County HIPAA-adjacent vendor vetting applies on most healthcare-system-affiliated MOBs. The facility manager will require insurance certificates, CCB license verification, and sometimes a vendor agreement acknowledging patient-area access restrictions. Cojo carries the required coverage and handles vendor onboarding up front.
Washington County and City of Hillsboro Permitting
City of Hillsboro permitting for ADA curb ramp installation depends on scope. A single-ramp replacement on an existing accessible route generally falls under a minor public-works permit. A multi-ramp project affecting pedestrian circulation may trigger a site-development review. Hillsboro Public Works coordinates with Washington County and Clean Water Services on ramps that interface with public right-of-way or affect stormwater.
For MOBs on a hospital campus, the campus master-plan ADA inventory drives the scope. Tuality, Kaiser Westside, and OHSU Hillsboro all maintain field-measured inventories that streamline bid-document preparation.
Industry Baseline Range
| Project Type | Cost Per Ramp | Typical Project |
|---|---|---|
| Single ramp replacement (standard width) | $1,800 to $4,500 | $1,800 to $4,500 |
| Multi-ramp replacement (5 to 10 ramps) | $1,500 to $3,800 per ramp | $7,500 to $38,000+ |
| Ramp + adjacent sidewalk panel | $2,500 to $6,500 | $2,500 to $6,500 |
| Detectable warning retrofit (only) | $400 to $1,200 per panel | $400 to $12,000+ |
Current Market Reality
Hillsboro MOB ADA scopes rarely land at baseline. After-hours premium labor, ambulance-access traffic-control at 24/7 healthcare campuses, hidden sub-base conditions on older private MOBs along TV Highway and Cornell Road, and concrete-cure waits all push the real number up. High-early-strength concrete mixes get the ramp back into service in 24 to 48 hours but add 15 to 30 percent to the concrete line item.
Phasing Around Clinic and Tech-Corridor Demand
Most Hillsboro MOBs operate Monday-through-Friday clinic hours with reduced weekend coverage. The Silicon Forest workforce concentration drives midweek lunch-rush patient volume at urgent-care and walk-in clinics, which makes weekday-evening phasing more disruptive than at typical Oregon MOBs. The cleanest phasing window is Friday evening through Sunday afternoon. High-early-strength concrete mixes make this single-weekend window workable.
Cojo's concrete services handles the ramp installation, with related Hillsboro parking lot striping for ADA accessible stall layout and ADA signage post-install. The Oregon asphalt paving cost baseline covers parking-lot scopes including both asphalt and concrete work.
What the Practice Manager and MOB Operations Lead Decide
The buyer at a Hillsboro MOB is usually the practice manager (single-tenant MOB) or the MOB operations lead (multi-tenant MOB). Three levers move cost: scope (single ramp, full inventory, or partial), schedule (single weekend or multi-weekend phasing), and concrete mix (standard cure or high-early-strength). For an active ADA complaint, the high-early-strength mix wins on the schedule lever despite the premium.
For MOBs that are part of a campus ADA upgrade, bundling the curb ramp work with parking-lot restripe per hospital and medical office striping discipline reduces mobilization overhead by 10 to 15 percent.
Common Failure Patterns Found at Site Walks
A site walk of an existing Hillsboro MOB accessible route usually surfaces three failure patterns. The first is cross-slope drift -- a ramp poured before 2010 may now read above the 2.08 percent maximum because of clay-soil settlement under the slab. The second is detectable-warning panels that have lifted, cracked, or worn through to the point where the truncated-dome surface no longer functions for cane-detection. The third is flare-slope drift at the side transitions, which creates a tripping hazard at the curb-flare interface.
Catching these failures at the walk-through stage and addressing them in a single bundled scope reduces mobilization overhead and gets the campus current with the 2010 Standards in one capital event. Hillsboro MOB facility managers at Tuality, Kaiser Westside, and OHSU Hillsboro-affiliated MOBs typically run ADA transition-plan refreshes on a 5-to-7-year cadence, and the campus inventory at refresh time usually identifies 4 to 12 ramps in this combined failure pattern -- enough volume to make a single multi-ramp mobilization the most cost-effective approach. The Washington County clay-soil subgrade is the underlying driver of the cross-slope drift, and any replacement scope should include a geotextile separation fabric under the new aggregate base to prevent the same settlement pattern from repeating.
Get a Hillsboro MOB ADA Curb Ramp Quote
Every Hillsboro MOB curb ramp scope sits on its own combination of existing-condition compliance gap, patient-access constraint, and after-hours phasing window. The only way to land an accurate number is a site walk with field measurement of every ramp on the accessible route. Cojo is CCB licensed and insured and has installed ADA curb ramps at MOBs across Washington County from the Tuality corridor to Kaiser Westside to OHSU Hillsboro-affiliated private clinics along Cornell Road and TV Highway. Contact us at /contact to schedule the walk.