General Contractor in Tualatin, Oregon

Fifteen minutes down Highway 99W and I-5 from our Beaverton HQ. Same in-house crews, same permit discipline, same CCB #204939 — with a habit of checking the flood map before we quote.

Who is the best general contractor in Tualatin?

Green O Construction is a CCB #204939 unlimited general contractor headquartered fifteen minutes from Tualatin, veteran-owned since 2008, with an architect on payroll and six in-house crews. We know Tualatin's two-county quirk, its river floodplain, and its clay soils — and we pull every permit in our own name.

Building in Tualatin: two counties, one river

Tualatin is home to roughly 27,900 people, and it is one of the few Portland-metro cities split across two counties — most of the city sits in Washington County, while the slice east of I-5 near Bridgeport Village falls in Clackamas County. Building permits still run through the City of Tualatin either way, but the county line matters for tax records, septic history on older parcels, and which county inspector shows up on work outside city limits. We sort that out before you ever see a proposal.

The bigger factor is water. The Tualatin River bends through the middle of town, and with it comes mapped FEMA floodplain along the river, Nyberg Creek, and Hedges Creek. River-adjacent lots in Riverpark and Nyberg can trigger floodplain development review before a shovel hits dirt. Add the housing stock — mostly 1990s-2010s subdivisions framed over Willamette Valley clay — and drainage is the conversation we have on almost every Tualatin site walk: downspout routing, footing drains, and grades that move winter water away from the slab instead of under it.

What we build in Tualatin

Roofing

A large share of Tualatin's housing went up in the same 1990s-2000s wave, which means whole streets in Byrom and Ibach are hitting re-roof age within a few years of each other. We are a CertainTeed SELECT ShingleMaster 4-Star contractor — tear-off, synthetic underlayment, and ridge ventilation done to the spec that keeps the 50-year material warranty valid, with the permit and mid-roof inspection handled by us.

Structural + Drainage

Clay soil plus a high winter water table is the Tualatin combination that cracks patios, heaves fence posts, and sends water toward crawl spaces. We run French drains, sump systems, and regrades with our own excavators, and we keep a CESCL-certified erosion control lead on staff for work near the river and creek corridors.

Additions + ADUs

Oregon's statewide ADU rules apply in Tualatin, and most single-family lots qualify. The design question here is usually lot coverage — 90s subdivisions used their setbacks efficiently, so a detached ADU has to be drawn around what the lot actually allows. Our architect is on payroll, so feasibility, drawings, and plan-review corrections all happen under one roof.

Exterior + Storm

The same build-out era means a lot of first-generation siding and original windows reaching end of life together. We install Hardie plank and LP SmartSide with the WRB flashed correctly, and after wind events we run storm inspections with drone documentation and scopes written in the language insurance adjusters approve.

Tualatin neighborhoods we work

Tualatin organizes itself by citizen involvement areas, and each one builds a little differently. Here is how the map reads from a contractor's truck.

Permits through City of Tualatin Community Development

Building permits go through City of Tualatin Community Development at 18880 SW Martinazzi Ave, with plan intake and status tracking through the city's eTRAKiT online system. Whether your lot is on the Washington County or Clackamas County side, the city issues the building permit — we file, track, and schedule inspections so you never stand in that line.

One Tualatin-specific step: if your property touches mapped floodplain along the river or the creek corridors, the city reviews floodplain development before the building permit moves. We flag that in the first site visit, not in week six.

Every permit is pulled in Green O's name — the code responsibility rides on our license, not on your homeowner record.

What a typical Tualatin job looks like

A representative scope from this part of our service area: a mid-90s two-story near Ibach with original three-tab shingles, moss on the north slope, and a crawl space that smelled like every Tualatin winter. The fix is a package, not a patch — full tear-off to CertainTeed Landmark with new ridge ventilation, gutter and downspout replacement sized for fir needles, and a perimeter French drain to a daylight outlet so the crawl space dries out and stays that way. Roof in two days, drainage in three, one permit file, one warranty packet registered to the homeowner.

Every service we run in Tualatin

Tualatin services, by category

Also serving nearby

Free walkthrough in Tualatin

Same-day callback for storm emergencies. 24-hour callback for everything else. If a repair beats a replacement, we will say so.

Hours: Mon-Fri 7am-6pm, Sat 8am-2pm · Closed Sundays · CCB #204939