Excavation
Grading Services in Sherwood, Oregon
Cojo
July 15, 2026
6 min read
Grading services in Sherwood, Oregon means shaping your lot so water runs away from buildings and every driveway, slab, or foundation sits on firm, compacted ground. In this southwest corner of the Portland metro, in Washington County, grading has to deal with Willamette Valley clay that drains slowly, some rolling terrain, and a dry-season window that makes summer work cleaner and more durable. The aim is positive slope, solid compaction, and no standing water. Below is what land grading in Sherwood involves, what it costs, and how to get it done right.
Sherwood sits in the Tualatin Valley portion of the Portland metro, in Washington County near Tualatin and Tigard. The soil trends toward silt and clay -- slow-draining ground that holds water and swells when saturated. That single fact drives grading here. A lot that looks fine in the dry months can turn into a soggy, water-holding mess by winter if it was never graded to shed water properly.
Grading in Sherwood is really about two things: building slope so surface water leaves the site, and compacting the ground so it does not settle later. Clay compacts unevenly if it is worked too wet, leaving soft spots that sink and crack driveways and patios down the road. Good lot leveling means grading to a target elevation, then compacting in lifts so the base actually holds. For how grading fits the full site-prep picture, see our Oregon excavation contractor guide.
A complete grading scope covers more than pushing dirt flat. Typical work includes:
Grading is the step that makes everything after it work -- driveways, foundations, patios, and landscaping all depend on it. On lots being cleared for a new build, grading often follows tree and stump removal, the kind of work covered in our guide to stump removal in Tigard just north in the same metro.
Grading is priced by area, cut-and-fill volume, soil, slope, and access. A flat lot with balanced cut and fill is cheaper than one needing imported fill or extensive drainage.
| Grading Item | Industry Baseline Range |
|---|---|
| Grading / leveling, per sq ft | $0.75 - $4.00+ per sq ft |
| Excavator + operator, hourly | $150 - $350+ per hour |
| Skid steer + operator, hourly | $125 - $275+ per hour |
| Fill dirt, delivered, per cu yd | $20 - $75+ per cu yd |
| Crushed gravel, delivered, per cu yd | $45 - $110+ per cu yd |
| Mobilization fee | $250 - $800+ flat |
| Minimum job callout (small residential) | $500 - $1,500+ |
Real Sherwood grading costs often run two to three times a baseline once wet clay, slope, or imported fill are in play. A lot that needs several truckloads of gravel to build a stable base over soft valley soil can see material costs outrun machine time. Tight suburban access can also slow the work. Budget a contingency and expect a $500 to $1,500+ minimum callout on small jobs.
Grading inside city limits follows City of Sherwood rules, while properties in unincorporated areas answer to Washington County. A grading permit is commonly triggered by the volume of earth moved or by work near wetlands, waterways, or steep slopes. Larger disturbance of an acre or more can also require an Oregon DEQ 1200-C stormwater permit.
Before any grading, Oregon law requires calling 811 to locate underground utilities. It is free and it prevents dangerous, expensive strikes -- important in Sherwood's established and newer developments alike, where utilities can run close to the surface. A CCB Licensed and Insured contractor like Cojo handles the 811 locate and confirms which permits your project needs. The same fundamentals apply to grading services in nearby Newberg, just down 99W in Yamhill County.
Sherwood follows the Willamette Valley pattern, with a grading season that runs roughly May through October. In those dry months, clay is workable, compaction is achievable, and machines are not tearing up saturated ground. From late fall through spring, grading gets slower and messier -- wet clay does not compact, ruts form fast, and erosion control becomes mandatory.
If your project can flex, schedule grading for summer. If it cannot, plan for erosion controls, gravel access, and the higher cost of moving wet clay. Timing the work to the dry window is one of the easiest ways to control cost and quality on a Sherwood lot.
Not every homeowner knows grading is the fix for a problem they are living with. On Sherwood's clay-heavy lots, a few common signs point to a drainage or leveling issue that grading solves:
Catching these early is cheaper than fixing the damage they cause. Standing water against a foundation is the kind of problem that quietly gets worse every wet season until it becomes a structural repair. Regrading to build proper slope and, where needed, adding drainage stops the water at the source.
Grading in Sherwood is about controlling water on valley clay, hitting the right slope and compaction, and doing it inside the dry-season window with the correct Washington County permits. Get it right and your driveway, slab, or foundation stays level and dry. Cojo -- a CCB Licensed and Insured Oregon contractor based in Hood River and serving the I-5 corridor -- handles grading, drainage, and site prep across the Sherwood area. Explore our excavation services or request a free estimate for a plan built around your lot.
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