Home › Foundation Excavation in Beaverton, OR

Foundation Excavation in Beaverton, OR

Foundation excavation in Beaverton, OR. Beaverton Excavation Co. digs footings, crawl spaces, and basements square and to depth for your concrete crew. Free estimates, licensed and insured.

Get a Free Estimate Call (971) 397-9361

Licensed & insured in Oregon Free on-site estimates Local Washington County crew Wet-season ready

Foundation excavation in Beaverton is layout-driven dirt work: footings, stem walls, crawl spaces, and basements dug square, to depth, and ready for inspection. Beaverton Excavation Co. digs foundations for new homes, additions, shops, and light commercial projects across Beaverton and Washington County. The plan gives the dimensions; our job is to make the excavation match without making the concrete crew fix the hole.

What makes Beaverton different is the range of ground under those plans. Low lots can bring wet clay and groundwater into the trench, while hillside sites may need stepped cuts, stable working benches, and careful drainage from the high side. Basalt can show up in places, and disturbed old fill is common around older properties. We dig to bearing, manage water, and leave a clean excavation that is ready for forms and steel.

Foundation excavation with squared footing trenches and an excavator in Beaverton, OR — A foundation dug square and to depth with clean footing trenches, ready for the concrete crew — Beaverton, OR.

Our Beaverton Foundation Excavation Services

Beaverton Excavation Co. excavates foundation work from the drawings, with the dimensions, bearing, and drainage details kept in view. We dig:

Footing trenches — dug square, to width, and to depth so the footing sits on solid, undisturbed bearing soil.
Basement excavation — full-depth digs with stable walls and room for the crew to form and pour.
Crawl space excavation — dug to the right depth and grade, with drainage in mind.
Stem wall and grade beam digs — precise trenching for the wall type on your plans.
Over-excavation and structural fill — digging out soft or wet soil and replacing it with compacted rock for solid bearing.
Footing and foundation drains — installed as we go so water is managed before the concrete's in.

Squared, To-Depth, and Ready for Concrete

Accuracy is what makes a foundation dig useful to the concrete crew. We lay out from the plans, cut footings to the required width and depth, and keep the excavation bottom on undisturbed bearing soil or properly compacted support rather than loose fill. Soft spots are over-excavated and rebuilt with compacted structural rock when the plans require it. The finished hole should let forms and concrete proceed without re-digging or re-squaring.

Keeping water out of the hole

On Beaverton winter digs, water is often the limiting factor. We schedule excavation close to inspection and pour timing, add footing drains or sumps where the site calls for them, and protect the subgrade so the hole does not sit open collecting rain. Good water control keeps the foundation work clean instead of delayed in mud.

Foundations in a Growing Beaverton

Beaverton foundations go into very different ground over a short distance. Older lots in Central Beaverton, Vose, and West Beaverton often mean tight access, previous additions, old slabs, and disturbed soil. Newer hillside work on Cooper Mountain, Sexton Mountain, South Beaverton, and the West Slope can mean stepped footings, retaining cuts, and water moving off the high side. Commercial pads near the Silicon Forest corridor bring their own access and scheduling constraints. Each setting changes how the hole is dug and protected.

The shared Beaverton problem is water. Low-lying ground tied to the city's old Beaverdam history can push groundwater into open footing trenches, while sloped lots can collect runoff from above if the excavation is left exposed. We time foundation excavation to the pour, install footing drains and sumps where the water calls for it, and dig to solid bearing below disturbed topsoil so your concrete crew forms and pours on stable ground.

How Much Does Foundation Excavation Cost in Beaverton, OR?

An average Beaverton home foundation excavation usually falls between $2,000 to $6,500. Foundation type, depth, rock or wet soil, access, and haul-off determine where it lands; footing and crawl-space work is usually lower, while basement excavation costs more. Equipment with an operator runs about $110 to $190 per hour, spoil haul-off is roughly $60 to $120 per cubic yard, and structural rock for over-excavation is about $35 to $60 per ton. The table shows typical Washington County ranges.

Foundation dig scope	Typical size	Typical Beaverton cost
Footing trenches (addition)	per project	$1,500 – $4,000
Crawl space / stem wall dig	average home	$2,000 – $6,500
Full basement excavation	average home	$6,000 – $18,000
Over-excavation + structural rock	add-on	+$1,500 – $6,000
Footing / foundation drain	per project	$1,500 – $5,000

Ranges are typical for the Beaverton / Washington County area and include excavation, spoil handling, and cleanup. Basement depth, rock, wet ground, and access move the number. We give a firm, itemized quote after a free site visit — no obligation.

Permits, Inspections, and Coordination

Foundation excavation follows the building permit, and the footing inspection usually comes after digging but before concrete. Beaverton Excavation Co. works from the inspected plan, coordinates with your general contractor and concrete crew, and handles the county-required erosion control. Our role is to keep the excavation piece aligned with the GC's schedule so the pour is not waiting on the hole.

What Working With Us Looks Like

1. Free on-site estimate

We study the plans on site, check soil, water, and equipment access, and return a written itemized quote.

2. Layout & permits

Layout is set from the foundation plan, while erosion control and inspection timing are coordinated around the build schedule.

3. Dig square and to depth

The crew excavates footings, walls, or basement areas to spec, keeping the bottom on solid bearing and managing water during the dig.

4. Inspection & handoff

The excavation is timed for footing inspection, then handed to the concrete crew clean, square, and at the required depth.

Frequently Asked Questions

How much does foundation excavation cost in Beaverton, OR?

An average Beaverton foundation excavation usually runs $2,000 to $6,500. Footing and crawl-space work is generally lower; basement excavation with haul-off can reach $6,000 to $18,000. Depth, access, rock, wet clay, hillside cuts, and structural fill all affect cost. We give a written number after reviewing the plans and walking the site.

What does foundation excavation include?

Foundation excavation includes digging footing trenches, crawl spaces, basements, stem walls, or grade beams to the plan dimensions and bearing requirements. If the soil is soft or wet, we over-excavate and rebuild with compacted structural rock. Where the plans call for drainage, we install footing or foundation drains and manage water so the hole stays stable until concrete.

How deep does a foundation need to be dug in Beaverton?

The depth comes from the foundation design, frost requirements, and bearing soil. Footings need to sit below frost depth on undisturbed or properly compacted support, while crawl spaces and basements follow their plan elevations. In Beaverton, we also watch for saturated clay, disturbed fill, and hillside drainage that may require over-excavation or structural rock.

Do you coordinate with my concrete crew and GC?

Yes. Foundation excavation has to line up with layout, footing inspection, and pour timing. We work from the inspected plan, coordinate with the general contractor and concrete crew, and schedule the dig so the hole is clean, square, and ready when forms and steel arrive instead of sitting open through unnecessary rain.

Can you dig a foundation in the rainy season?

Yes, but timing and drainage matter. A Beaverton winter can put rainwater or groundwater into an open excavation quickly, especially on low ground or below a slope. We dig close to the inspection and pour, use sumps or footing drains where needed, and protect the subgrade so the concrete crew is not working in mud.

Get Your Free Beaverton Excavation Estimate

Send over the basics of the job and we will visit the property, walk the ground with you, and price the scope in writing — no pressure and no obligation. Call, text, or use the form; we reply the same business day.

Prefer to talk?

Call or text to reach our team directly. During business hours we pick up when we can, and every message gets a return call.

(971) 397-9361

Hours: Mon–Sat, 7am–6pm