Concrete Contractor in Sherwood, Oregon: Driveways, Patios & Flatwork

Quick Verdict

A good concrete contractor in Sherwood handles driveways, patios, walkways, steps, and slabs with proper sub-grade prep, correct slab thickness, and control joints cut on time — the three things that decide whether your flatwork lasts decades or cracks early. In Washington County the big variable is the Tualatin Valley's heavy clay and silt that hold water and move with the seasons, especially on the low ground near the Tualatin River. Cojo is CCB Licensed & Insured, has worked Oregon concrete since 2009, and serves Sherwood and the west-side metro corridor. This guide covers what we install, what drives the price, and how to vet any crew.

What a Sherwood Concrete Contractor Does

Concrete work in Sherwood covers more than a driveway. The common Washington County jobs:

• Driveways — the most common residential pour, 4 inches for cars, 5 to 6 for RVs and trucks, common on Sherwood's newer subdivisions and older Old Town lots alike.
• Patios and walkways — backyard living space and paths, broom-finished or stamped.
• Slabs — shop floors, shed pads, and ADU foundations.
• Steps, curbing, and aprons — the approach where a driveway meets the street.
• Repair and replacement — tearing out failed flatwork and rebuilding the base.

For the full range of what concrete covers, see our overview of concrete services in Oregon.

Sherwood and Washington County Conditions

Sherwood sits in the Tualatin Valley on the southwest edge of the metro area, served by Highway 99W, and the local ground drives how concrete should be built.

• Tualatin Valley clay and silt. The valley soil holds water through the wet months, swells, and shrinks as it dries, and that movement lifts and cracks slabs poured on poorly prepped sub-grade.
• Low, wet ground near the river. Parts of Sherwood sit on low ground near the Tualatin River and its wetlands, where drainage and a draining base matter even more.
• Wet-season pours. Sherwood gets heavy rain from late fall into spring. Concrete still pours in cool, damp weather but cures slower and needs protection — see our guide on concrete cure time in wet weather.
• Mild freeze-thaw. The valley floor sees fewer hard freezes than the Cascades or Gorge, but cold snaps still happen, so drainage and sealing matter.

Sub-Grade Prep Beats the Clay

Most concrete failures in Washington County trace back to the base over reactive clay, not the concrete itself. A bid that skips prep is the most expensive mistake on Sherwood soil.

A solid flatwork job includes:

1. Strip and grade. Remove sod and soft soil, then shape the grade so water sheds away.
2. Manage the clay. Compact the sub-grade and add compacted crushed rock to give the slab uniform support and a path for water.
3. Form and reinforce. Set forms and lay rebar or wire mesh to tie the slab together against clay movement.
4. Cut control joints on time. Joints steer cracking into straight, hidden lines.

See our breakdown of concrete sub-grade prep for the full standard, which matters more here because of the wet valley soil.

What Concrete Costs in Sherwood

Pricing depends on the job — driveways, patios, and decorative work price differently — so any number is a planning range, not a quote.

Project	What drives the price
Plain driveway	Square footage, thickness, tear-out
Patio / walkway	Finish type, access, prep
Stamped / decorative	Pattern, color, sealing
Slab / pad	Thickness, reinforcement, sub-grade work

Industry Baseline Range: standard broom-finished flatwork in Oregon commonly runs in the range of $8 to $15 per square foot installed, with decorative and stamped work running higher per square foot+. These are industry baseline ranges for planning only — actual pricing depends on lot size, access, condition, and current market conditions. Get a site-specific quote. For driveway-specific numbers, see Sherwood concrete driveway costs.

Current Market Reality

Cement, rebar, and trucking costs move with the broader market, and reliable west-side crews book early in the work season. The lowest bid often skips base rock, reinforcement, or proper joints — costs that show up as cracks within a couple of wet-soil seasons. Compare scopes, not just bottom-line numbers.

How to Vet a Concrete Contractor in Sherwood

Before you sign:

• Confirm the CCB license. Every legitimate Oregon contractor carries an active CCB license and insurance. Cojo is CCB Licensed & Insured.
• Ask how they handle wet valley soil. The bid should spell out compaction, base rock, drainage, and reinforcement — not just "pour concrete."
• Get the thickness and joint plan. Driveways should be at least 4 inches; control joints belong on the bid.
• Ask about cure and sealing. A crew that plans for wet west-side winters knows local conditions.
• See local work. Ask for Washington County jobs you can look at.

The Bottom Line

Concrete flatwork in Sherwood lasts decades when the base is prepped to handle Tualatin Valley clay and wet ground, the slab is thick enough, the steel is in place, and the joints are cut on time. The valley's water-holding soil punishes shortcuts, so the contractor who explains their prep and drainage plan is the one to hire. Cojo provides concrete services across Sherwood and the west-side metro corridor. Request a quote and we will walk your site before we pour.