Concrete curbing in Washington County is corporate-campus and suburban-retail commercial work. The Intel campuses in Hillsboro, Nike's global headquarters in Beaverton, the major mall and retail centers (Washington Square in Tigard, Bridgeport Village in Tualatin, Cedar Hills Crossing in Beaverton, Tanasbourne and Orenco Station in Hillsboro), and the dense apartment and office-park stock across the county each run thousands of linear feet of perimeter curb plus ADA ramp and bulb-out work. Willamette Valley clay subgrade drives base-preparation requirements, and county-level inspection enforcement of ADA pad placement makes the detail work as important as the linear feet. Cojo runs Washington County concrete-curbing scopes with proper clay-base compaction, 4,000-psi concrete mix design, and ADA-compliant ramp integration tied to the surrounding parking lot striping in Washington County and paving scope.
Hillsboro, Beaverton, and the Corporate Campus Curb Networks
Hillsboro runs Washington County's largest single-site curb networks at the Intel campuses (Aloha, Jones Farm, Ronler Acres, Hawthorn Farm). Internal facility roads, semi-truck loading zones, employee parking lots, and pedestrian walkways all run continuous perimeter curb sections plus ADA-compliant ramps at every cross-walk and entry walk. The Intel internal road network alone holds tens of thousands of linear feet of concrete curb across the four major campuses, with recurring replacement scope tied to ongoing facility expansions and parking-lot reconfigurations.
Beaverton runs Nike global headquarters on SW Murray Boulevard, with its dense internal campus walks, parking decks, and surface-lot curb networks. The Tektronix Beaverton campus, the Cornell Crossing retail belt, Cedar Hills Crossing mall, and the Beaverton Round transit hub each anchor distinct curb scopes. Tigard holds Washington Square mall (the largest mall in Oregon), the downtown Main Street curb-and-gutter, and the OR-99W retail belt. Tualatin runs Bridgeport Village and the SW Tualatin-Sherwood Road retail frontage. Sherwood holds the Old Town retail district plus Sherwood Boulevard commercial belt. For full lot-marking and paving scope on the same sites, our asphalt paving in Washington County coverage handles the paving side.
Extruded vs Formed Concrete Curbing
The two main concrete-curb approaches each have a job-fit profile:
Extruded curb is poured continuously from a slip-form curb machine. The machine extrudes a fixed-profile curb (commonly 6 inches by 6 inches or 6 inches by 8 inches) in long runs at high speed. Extruded curb is the right call for parking-lot perimeter runs, landscape island borders, and any long-straight or gentle-radius curb scope on Washington County's retail centers and corporate campuses. Cost-per-linear-foot is the lowest of any curb option because the machine does the forming.
Formed-and-poured curb uses wood or metal forms set in place, then poured by hand or pump. This is the right call for ADA-compliant curb ramps with detectable warning surface integration, bulb-out approaches with tighter radii, trash-enclosure pad surrounds, and any custom-profile section that does not fit a slip-form extruder. Formed-and-poured costs more per linear foot but handles the complex geometry that extruded cannot.
A typical Washington County commercial curbing job uses extruded for the perimeter and formed-and-poured for the ADA ramps and bulb-outs. The full cost comparison framework lives in our concrete curbing cost per foot breakdown, with multi-family-specific guidance in concrete curbing for HOA.
ADA Compliance and Washington County Inspection
Washington County enforces ADA detectable warning pad placement at every ramp tied to a marked crossing -- the truncated dome pad goes at the back of curb on the ramp, oriented perpendicular to direction of travel, sized to the federal 24-inch by 48-inch minimum. County Land Use and Transportation runs inspection on permitted public-right-of-way curb work; city building departments in Hillsboro, Beaverton, Tigard, Tualatin, and Sherwood handle private-property permits where ADA ramps or stormwater drainage are touched.
Bulb-outs (curb extensions at intersections) and ADA-compliant ramp transitions are the two highest-scrutiny scopes in any Washington County curb-and-paint job. Both require careful sequencing: the excavation in Washington County for ramp grading runs first, then the formed-and-poured curb sets the ramp profile and detectable warning pad position, then the paving and crosswalk paint follow.
Willamette Valley Clay Base and Curbing Durability
Washington County subgrade is predominantly Willamette Valley clay across the valley floor, transitioning to Tualatin Mountain basalt in the north and Coast Range foothill soils in the west. Clay subgrade requires proper compaction (minimum 95 percent Standard Proctor Density) and adequate crushed-rock base under any concrete pour. Skipping base prep is the most common shortcut on cheap curb jobs and causes settlement, cracking, and premature failure within five to ten years.
A correctly built concrete curb in Washington County runs 30-plus years of service life with minimal maintenance. The base preparation, joint placement (control joints at 4-to-6-foot spacing for extruded, isolation joints at adjacent slabs), and proper 4,000-psi-minimum concrete mix design all factor into the durability outcome. Willamette Valley winters with their wet-then-cold cycles also exercise the joint detailing -- curbs without proper isolation at fixed slab interfaces crack at the joint within five winters.
Industry Baseline Range -- Washington County Concrete Curbing
Industry Baseline Range
| Scope | Typical Output | Baseline Cost |
|---|---|---|
| Extruded curb (6 in by 6 in profile) | per linear foot | $7 to $14 |
| Extruded curb (6 in by 8 in profile, larger commercial) | per linear foot | $9 to $16 |
| Formed-and-poured straight curb | per linear foot | $14 to $28 |
| ADA-compliant curb ramp (formed-and-poured) | per ramp | $1,200 to $3,500+ |
| Bulb-out curb extension | per bulb-out | $2,500 to $7,500+ |
| Trash-enclosure curb surround | per enclosure | $1,500 to $4,500+ |
| Curb removal and replacement | per linear foot | $18 to $35 |
Current Market Reality
Washington County concrete-curbing pricing runs at the upper baseline range on most commercial jobs because of permit and inspection overhead in Hillsboro and Beaverton and the longer-than-average crew time for proper Willamette Valley clay subgrade preparation. ADA ramp jobs almost always price above the per-ramp baseline because the bid includes the detectable warning pad, the formed ramp profile, the connecting walk modification, and the county inspection cycle. Intel and Nike internal-campus thermoplastic-grade concrete-curb scopes price independently of public right-of-way and absorb security and access-coordination overhead on top of the standard pricing. Bundling concrete curbing with asphalt paving in Washington County on the same site visit keeps cost down -- single mobilization, single permit cycle, single inspection cycle.
Permit Coordination and Inspection Cycles
Concrete curbing in the public right-of-way triggers a city permit (Hillsboro, Beaverton, Tigard, Tualatin, Sherwood, Forest Grove, Cornelius, depending on jurisdiction), a stormwater review, and a final inspection. Curbing on private property (parking lots, apartment complexes, retail centers) routes through each city's building department if the scope touches an ADA ramp or modifies stormwater drainage. Smaller private-property scopes without ramp or stormwater impact can sometimes proceed without permit, but most commercial owners require permitted scope for liability and insurance reasons. State-route frontage work on US-26, OR-99W, OR-217, and OR-8 triggers ODOT Region 1 coordination on top of the local permit. A complete bid for any Washington County concrete-curbing scope includes the permits, inspection coordination, and traffic-control plan if right-of-way is impacted.
Get a Washington County Concrete Curbing Quote
Cojo runs Washington County concrete curbing with proper Willamette Valley clay subgrade compaction, 4,000-psi concrete mix, ADA-compliant ramp and bulb-out detail integration, and city / county / ODOT permit coordination. Extruded perimeter curb, formed-and-poured ADA ramps, bulb-outs, and trash-enclosure surrounds all stay on one mobilization. Get a contractor quote for Hillsboro, Beaverton, Tigard, Tualatin, or any Washington County site.