The 97223 zip covers a large slice of Tigard including Bull Mountain on the south, the Tigard Triangle commercial area to the north, the residential neighborhoods through Metzger and the Pacific Highway 99W corridor, and the hillside subdivisions that climb Bull Mountain. The character of 97223 is a mix of established suburban residential, active commercial along 99W and Bridgeport, and continuing residential development on the Bull Mountain hillside. Concrete curbing in 97223 is split between two main scopes: drainage curb for hillside subdivisions on Bull Mountain, and replacement and ADA-compliance curbing for the older commercial lots along the established corridors.
Why curbing matters in 97223
Concrete curb in 97223 does three jobs: controls water on hillside lots, defines lot edges, and protects soft surfaces from vehicle impact. The 97223 difference is the prominence of the first job. Bull Mountain has a real grade -- 200 to 500 feet of elevation change from valley floor to ridge -- and the runoff during the heavy October-through-May rain window is significant. Drainage curb is the visible piece of a stormwater system that has to handle that runoff or the consequences show up as wet basements, eroded landscaping, and undermined driveways within five years.
Tigard's stormwater management code (chapter 18.660 of the Tigard Community Development Code) requires every new development to manage its runoff on-site or route it through approved stormwater facilities. The curb is the visible piece. The infiltration trench, swale, or other facility behind the curb is the engineered piece. Both have to be designed and built to spec.
Bull Mountain hillside subdivisions
Residential development on Bull Mountain has been steady for two decades. Subdivisions along Bull Mountain Road, SW 150th, and the various access roads up the hill have generated continuous curb work. The standard new-subdivision curb in 97223 is a 6-inch concrete face with a 12-inch gutter pan, tied to a stormwater system that complies with Tigard 18.660.
On the steepest lots, curb-and-gutter work is paired with retaining wall and drainage swale design. We typically run a base drain (perforated pipe wrapped in fabric and gravel) behind any curb on a slope above 8% to relieve hydrostatic pressure on the back face. This kind of detail protects the curb for 25 to 35 years rather than 10.
Tigard Triangle commercial
The Tigard Triangle commercial area at the intersection of I-5, Highway 217, and 99W is one of the most active commercial zones in Washington County. The area includes Bridgeport Village, the office and retail along 72nd Avenue, and the various smaller commercial properties that fill out the triangle. Curb work here is mostly replacement and ADA-compliance scope on properties that were originally built in the 1980s and 1990s.
ADA curb ramp upgrades are an ongoing piece of the work. A compliant ramp in 2026 needs: maximum 8.3% running slope, 2% maximum cross slope, 4-foot landing at the top, detectable warning truncated domes at the bottom, flush transition to the gutter pan. Most older Triangle ramps fail on at least two of these. Full replacement is the typical fix.
Cost ranges for 97223 curbing
Industry Baseline Range
| Project Type | Cost Per Linear Foot | Typical Total |
|---|---|---|
| Extruded curb (machine-poured, commercial) | $7 to $14 | $1,500 to $9,000+ |
| Form-and-pour curb (residential subdivision) | $14 to $30 | $3,000 to $18,000+ |
| Drainage curb with integrated gutter pan | $18 to $38 | $4,500 to $25,000+ |
| ADA curb ramp (per ramp, full replacement) | — | $2,500 to $7,500+ |
| Hillside curb with base drain | $25 to $50 | varies by length |
Current Market Reality
Concrete curbing prices in Tigard run at or near the broader Portland metro baseline. The main variances are hillside complexity on Bull Mountain (adding base drain, retaining wall coordination, and steeper grades), ADA compliance scope on older Triangle commercial, and the Tigard 18.660 stormwater coordination cost. Concrete material prices moved up through 2025 and 2026 with cement plant energy costs and trucking, and labor for skilled finishers has tracked the broader construction wage market. See our concrete curbing cost per foot guide for the full statewide pricing context.
Tigard 18.660 stormwater coordination
The Tigard Community Development Code chapter 18.660 sets the city's stormwater management rules. For any 97223 development that adds or modifies impervious area above defined thresholds, the design has to include stormwater management facilities -- typically infiltration trenches, swales, biofiltration, or approved alternatives.
The curb is the visible piece. The engineered facility behind the curb is what actually manages the runoff. We pull Tigard engineering into the scope at quote time on any 97223 project that triggers 18.660 review. Doing the design work right at the front end prevents both code-enforcement issues and the much larger cost of retrofitting a stormwater system after construction.
What good curb in 97223 looks like
The curb that lasts 25 to 35 years in Tigard has three things going for it: a 4-inch minimum compacted aggregate base, a 4,000 psi air-entrained concrete mix, and a clean cure under either a wet blanket or a cure-and-seal product for the first 72 hours. The freeze-thaw exposure in 97223 is moderate -- maybe 30 to 50 freeze events a winter at the Bull Mountain elevation, fewer at the valley floor -- which still demands proper air entrainment for long service life.
The curb that fails inside 10 years usually skipped at least one of those three. Soft subgrade is the most common cause of failure. Wrong mix (a 3,000 psi driveway-grade product without air entrainment) is second. Overworking the surface during finishing is third. The upcharge for proper mix and proper base is small. The lifespan difference is enormous.
Scheduling concrete in 97223
The practical pour window in Tigard runs mid-April through mid-October. Outside that, we use accelerators or cure blankets for limited scope, but new curb work in Tigard during winter is uncommon. Peak-season lead times run four to eight weeks from quote acceptance.
New subdivision curb on Bull Mountain typically dispatches in concrete-truck-loaded blocks of three to five lots at a time. ADA ramp upgrades and section repair on Triangle commercial lots schedule around tenant operating hours in 48 to 72 hour blocks per curb section.
Cojo serves 97223 and the broader Washington County market with concrete curbing built for hillside conditions. We spec the mix, run the cure, and stand behind the finished work. Schedule a site visit. For nearby and related coverage see Sandy curbing, Tigard King City asphalt, and our broader sealcoating Tigard page.