Excavation
Driveway Excavation in Tigard: Cost, Permits, and Process
Cojo
April 18, 2026
10 min read
If you are replacing a cracked, sunken driveway in an older Tigard neighborhood near Main Street (97223), cutting a new drive into a Bull Mountain hillside lot (97224), or widening a double-wide at a Summerfield home, the excavation budget is where most homeowners get caught off guard. The driveway surface gets most of the attention, but the excavation underneath is what drives the real cost. For a broader statewide look at this topic, see our guide to driveway excavation cost in Oregon.
Tigard has its own particular mix of conditions. Bull Mountain lots bring slope, rock pockets, and tight switchback access. The flatter north side of town sits on heavy Willamette Valley clay. Older neighborhoods off Hall Boulevard and Tigard Street have mature trees and legacy utilities that are not always where the plans say they are. And Tigard Public Works runs its own right-of-way and curb cut permitting process that is separate from Washington County or ODOT.
This guide walks through what driveway excavation typically costs in Tigard, what pushes the price above baseline, how the permit path works, and where homeowners most often run into surprises. It is written as an informational pricing guide — not a sales quote — so you can build a realistic budget before the first contractor shows up.
Published industry averages assume an easy site: flat, workable soil, easy access, minimal haul-off, no permit complications. Tigard jobs often sit above those baselines once clay subgrade, Bull Mountain slope, or curb cut permitting are factored in.
Industry Baseline Range
| Project Scope | Unit | Industry Baseline |
|---|---|---|
| Single-car driveway excavation (tear-out + subgrade prep) | flat | $2,500 – $9,000+ |
| Double-car driveway excavation | flat | $4,500 – $16,000+ |
| Driveway excavation, per sq ft | per sq ft | $4 – $20+ |
| Excavator + operator | per hour | $150 – $350+ |
| Skid steer + operator | per hour | $125 – $275+ |
| Dump truck haul-off (10–14 cu yd) | per load | $250 – $750+ |
| Disposal / dump fee | per load | $75 – $300+ |
| Mobilization fee | flat | $250 – $800+ |
| Tigard curb cut / right-of-way permit | flat | $200 – $1,200+ |
| Minimum job callout | flat | $500 – $1,500+ |
The industry baseline ranges above represent ideal conditions — easy access, workable soil, shallow depth, minimal haul-off. In practice, actual project costs frequently exceed published averages by 2 to 3 times when complications arise. Oregon's clay soils, rocky terrain, unmarked utilities, permit requirements, and disposal fees can all push costs well above baseline figures. The only reliable way to know your actual cost is through an on-site assessment.
In Tigard specifically, Bull Mountain slope work, clay subgrade on north-side lots, and curb cut permitting through Tigard Public Works are the most common reasons a job prices above baseline. We have a deeper breakdown of the variables in our excavation cost factors guide.
Even after a careful site walk and an 811 Oregon locate, some conditions only surface once the excavator starts moving material on a Tigard driveway:
A straightforward single-car residential driveway excavation in Tigard usually runs one to two working days on-site for the excavation phase. Paving or concrete pouring is a separate phase. For the full breakdown across project types, see how long driveway excavation takes.
Tigard's wet season from roughly November through March slows clay excavation. Most larger driveway excavations are scheduled for the May–October window when soil conditions cooperate.
Any new driveway approach, or a change to where an existing driveway meets the public street, requires a right-of-way and curb cut permit from Tigard Public Works. The review looks at sight triangles at intersections, ADA-compliant sidewalk ramping, spacing from other driveways, and stormwater conveyance. Replacing an existing driveway in the same footprint is usually simpler than cutting a new approach. Permit fees, engineering review, and inspection scheduling all add time and cost.
Homes on Bull Mountain, Cooper Mountain, and the rising ground south of Beef Bend Road bring slope, switchback driveways, and rock pockets into the job. Slope work often requires retaining elements, engineered drainage to handle uphill runoff, and deeper cuts to reach stable subgrade. Expect 30 to 70 percent higher excavation costs on a sloped Bull Mountain driveway versus a similar-sized flat lot on the north side of town.
Large sections of north Tigard — Tigard Triangle, neighborhoods around Hall Boulevard, Summerfield — sit on Willamette silt and clay. These soils hold water, shrink and swell seasonally, and require thicker structural base sections under a driveway than sandy soils. Contractors working in Tigard clay commonly specify over-excavation, geotextile fabric, and deeper crushed rock base. Our guide on clay soil and driveway excavation covers the subgrade details.
Tigard's older pockets near Main Street and Tigard Street have overlapping generations of utility installs. Private laterals — sewer, water service, old gas drops — are the homeowner's responsibility to locate, and misidentification during excavation is a common cost driver.
Properties near Fanno Creek and its tributaries may be partially in mapped floodplain or sensitive lands. Any change to impervious surface or regrading near those corridors can trigger additional review by Clean Water Services or the City of Tigard. Your contractor should flag this early. Reshaping runoff on a driveway project is worth its own reading — see driveway regrading for drainage.
Tigard has limited close-in disposal options. Haul distances to approved facilities affect truck cycle time and total load count. For a full driveway tear-out, two to five truckloads of spoils is typical, and disposal fees have climbed steadily over the past several years.
DIY may be reasonable when:
Hire a pro when:
Permit responsibility in Tigard is split between the city and surrounding agencies depending on which street your driveway opens onto. Before scoping, read our overview of driveway excavation permits in Oregon to understand what typically triggers review.
| Work Type | Permit? | Typical Cost |
|---|---|---|
| Replace driveway, same footprint | Often no separate excavation permit; paving may need permit | $100 – $400+ |
| New or widened curb cut | Yes — Tigard Public Works | $200 – $1,200+ |
| Right-of-way work | Yes — Tigard Public Works | $150 – $900+ |
| Sensitive lands / Fanno Creek vicinity | Yes — additional review | $250 – $1,500+ |
| Drainage / stormwater changes | May require Clean Water Services review | $200 – $1,200+ |
For a step-by-step on vetting candidates, see hiring a residential excavation contractor.
A realistic Tigard driveway excavation budget comes from a site walk, not a phone call. Soil, slope, tree impact, and permit path are visible in ten minutes on-site and invisible everywhere else.
Cojo provides free on-site excavation assessments throughout Tigard. We will walk the driveway with you, flag the likely complications, and leave you with a written scope you can compare against other bids.
Get a free excavation estimate or learn more about our excavation services. See completed work on our project portfolio, and browse more planning content in our resources section.
Service Area: Primary coverage is Tigard (97223, 97224). We also serve nearby communities including Tualatin, Beaverton, Lake Oswego, and King City — ask when booking.
How much does driveway excavation cost in Tigard? Industry baseline ranges for residential driveway excavation in Tigard run roughly $2,500 to $9,000+ for a single-car driveway and $4,500 to $16,000+ for a double. Bull Mountain slope work, clay subgrade on north-side lots, and Tigard Public Works permits can push actual costs above those baselines. An on-site assessment is the only reliable way to get a real number.
Do I need a permit to replace a driveway in Tigard? Replacing a driveway in the same footprint typically does not require a Tigard Public Works curb cut permit, but creating a new approach or widening an existing one does. Work near Fanno Creek, in sensitive lands, or involving stormwater changes may trigger additional review through the city or Clean Water Services.
How long does driveway excavation take on a Tigard lot? A straightforward single-car driveway excavation in Tigard takes 1 to 2 days on-site for the excavation phase. Double-wide driveways, new curb cuts, or Bull Mountain slope work can extend the excavation phase to 3 to 5 days or more.
Why does driveway excavation cost more on Bull Mountain? Bull Mountain lots bring slope, rock pockets, and switchback driveway geometry that flat lots do not have. Slope work often requires retaining elements, engineered drainage, and smaller equipment working more hours to move the same volume. Expect 30 to 70 percent higher costs versus a comparable flat-lot Tigard driveway.
Does clay soil really affect driveway cost in Tigard? Yes. Willamette Valley clay on the north side of Tigard holds water, pumps under load in the wet season, and requires thicker structural base sections than sandy soils. Over-excavation, geotextile fabric, and deeper crushed rock bases are common specifications, all of which add to the excavation budget.
Plan your French drain installation budget with 2026 Oregon pricing. Covers interior and exterior drains, yard drainage, and foundation waterproofing costs.
Understand land clearing costs per acre in Oregon for residential, commercial, and agricultural projects. Pricing by terrain, vegetation density, and disposal methods.
Compare drainage solutions for standing water. Ranked by effectiveness, cost, and suitability for Oregon's climate. French drains, regrading, dry wells, and more.