How Much Does Excavation Cost in Portland, OR? (2026 Guide)

If you're planning a construction project, drainage fix, or demolition job in the Portland metro area, one of the first questions you'll ask is: how much is this going to cost?

The honest answer is that excavation costs vary — sometimes significantly — depending on what you're doing, how deep you're digging, what the soil looks like, and how easy it is to get equipment onto your property. But you deserve better than "it depends," so this guide breaks down real pricing ranges for every common type of excavation work in Portland as of 2026.

These numbers are based on typical residential and light commercial projects in the Portland metro area. Your actual cost will depend on your specific site conditions, which is why we always recommend getting a detailed estimate before committing to any contractor.

What Affects Excavation Cost?

Before looking at prices by project type, it helps to understand the factors that move the number up or down.

Soil conditions matter more than most homeowners expect. Portland's soil varies dramatically across the metro area. Parts of East Portland and Gresham have heavy clay that's slow to dig and difficult to work when wet. Areas in West Linn, Lake Oswego, and parts of SW Portland have rocky terrain that requires hydraulic breakers and extra time. Sandy soil in some areas is easier to dig but may need more shoring for deep trenches. Your soil type directly affects how long the job takes and what equipment is needed.

Depth of excavation is straightforward — deeper digs take longer, require more soil removal, and may need shoring or stepped excavation for safety. A 2-foot utility trench is a different job than an 8-foot foundation excavation.

Access to the site can make or break a quote. If an excavator can drive straight onto the property from the street, that's ideal. If the work area is in a tight backyard behind a fence, down a slope, or surrounded by landscaping that needs protection, the job takes longer and may require smaller (slower) equipment.

Hauling distance affects cost because excavated soil has to go somewhere. If the disposal site is 10 minutes away versus 40 minutes away, that's more truck time and fuel per load. Portland-area disposal and fill sites are spread across the metro, and hauling costs add up on large jobs.

Permits are required for most excavation work in Portland. The permit fees themselves are usually a few hundred dollars, but the time to obtain them and any required engineering or inspections add to the total project cost.

Season plays a minor role. Portland's wet season (October through May) can slow excavation work if the soil is saturated. Most contractors work year-round, but extremely wet conditions can add time and cost. Summer is the busiest season, so scheduling can be tighter.

Excavation Cost by Project Type

Foundation Excavation

Foundation excavation is the process of digging the hole where your home, addition, ADU, or garage foundation will be poured. This is precision work — the excavation has to match the engineering plans exactly in depth, width, and grade.

Typical cost in Portland: $5,000 – $15,000

A standard residential foundation (single-story home, slab or crawlspace) is usually on the lower end. Two-story homes, full basements, or difficult soil conditions push toward the higher end. The cost covers excavation, soil hauling, and base preparation. It does not include the actual foundation pour — that's a separate contractor.

Factors that increase foundation excavation cost: rocky soil requiring hydraulic breaking, deep excavations for full basements (8+ feet), limited site access, and steep or sloped lots that need additional grading before excavation can begin.

Basement and Crawlspace Dig-Outs

Basement and crawlspace excavation involves digging out the space beneath an existing home — either converting a crawlspace to a full basement or deepening an existing basement. This is one of the more expensive residential excavation projects because the work happens under a standing structure and requires careful planning, underpinning, and shoring.

Typical cost in Portland: $10,000 – $40,000+

A simple crawlspace dig-out to gain a couple feet of clearance is on the lower end. A full crawlspace-to-basement conversion with underpinning and structural engineering is on the higher end. The wide range reflects the complexity — every home is different, and the structural requirements drive the cost.

Grading and Site Preparation

Grading and site preparation is the process of shaping the land to the correct slope and elevation for construction, landscaping, or drainage. Rough grading moves large volumes of soil. Finish grading creates the final, precise surface.

Typical cost in Portland: $2,000 – $20,000

Small residential jobs like driveway preparation or backyard leveling are $2,000 to $6,000. Full lot grading for new home construction on a raw lot runs $5,000 to $20,000+ depending on the lot size, amount of soil to move, and whether fill material needs to be imported.

Driveway preparation specifically — excavation, grading, and base compaction for a new driveway — typically costs $2,000 to $5,000 for a standard two-car residential driveway.

Demolition and Concrete Removal

Demolition and concrete removal covers tearing out old concrete driveways, sidewalks, patios, foundations, sheds, and asphalt surfaces.

Typical cost in Portland:

• Concrete driveway removal (two-car, 4 inches thick): $1,500 – $4,000
• Patio removal: $1,000 – $3,000
• Sidewalk removal: $500 – $2,000
• Shed demolition: $1,000 – $3,000
• Foundation demolition: $3,000 – $10,000+
• Asphalt driveway removal: $1,500 – $3,500

These prices include breaking, loading, hauling, disposal, and basic site cleanup. Reinforced concrete (with rebar or wire mesh) costs more than unreinforced because it takes longer to break and separate. Concrete is recyclable, which can reduce disposal costs compared to mixed demolition debris.

Trenching and Utility Installation

Utility trenching is the excavation work required to install underground utilities — water lines, sewer lines, electrical conduit, gas lines, irrigation systems, and downspout drains.

Typical cost in Portland: $5 – $30 per linear foot

The per-foot cost depends heavily on depth and what's being installed:

• Irrigation or conduit trenching (shallow, 12-18 inches): $5 – $10 per linear foot
• Water line trenching (30-36 inches deep): $15 – $25 per linear foot
• Sewer line trenching (3-6+ feet deep): $20 – $30 per linear foot
• Electrical trenching (18-24 inches): $10 – $20 per linear foot

For a typical residential water line replacement (50-80 feet of trench), you're looking at $1,500 to $3,000 for the excavation work alone. The plumber or electrician charges separately for the actual pipe or conduit installation.

Sewer Line Excavation

Sewer line excavation is a specific type of trenching that deserves its own category because of the depth involved and the urgency — when your sewer line fails, you need it fixed fast.

Typical cost in Portland: $3,000 – $10,000

This covers excavation to expose the damaged sewer line, holding the trench open for your plumber to make the repair, backfilling, and surface restoration. The wide range depends on depth (sewer lines can be 3-8+ feet deep), length of trench needed, and what's on the surface above the line. If the sewer runs under a driveway or sidewalk, the cost increases because the concrete needs to be demolished and later replaced.

French Drain Installation

French drain installation is one of the most common excavation projects in Portland because of the region's heavy rainfall. French drains collect and redirect groundwater away from foundations, crawlspaces, and low-lying yard areas.

Typical cost in Portland: $25 – $50 per linear foot installed

For a standard exterior foundation drain (50-80 linear feet around the perimeter), expect $3,000 to $6,000. A yard French drain to fix a soggy area is usually $2,000 to $5,000. Interior crawlspace drains with a sump pump system run $3,000 to $8,000.

The cost includes trenching, pipe, gravel, filter fabric, backfill, and surface restoration. The per-foot price varies based on depth (foundation drains are deeper than yard drains) and soil conditions.

Foundation Waterproofing

Foundation waterproofing involves excavating around the entire foundation perimeter, applying a waterproofing membrane, installing drainage board and a footing drain, and backfilling. It's a major project.

Typical cost in Portland: $8,000 – $20,000+

For a standard residential foundation (100-150 linear feet of perimeter), this range covers the excavation, waterproofing membrane, drainage board, footing drain, and backfill. Partial waterproofing (one or two walls) costs proportionally less. The cost increases with foundation depth, difficult access, and the complexity of surface restoration (if decks, patios, or landscaping need to be removed and replaced).

Dry Well Installation

Dry well and stormwater system installation is another Portland essential. Dry wells collect rainwater and allow it to percolate into the surrounding soil.

Typical cost in Portland: $2,000 – $5,000

This covers excavation, dry well chamber installation, connecting drain lines, gravel, and backfill. Soakage trenches are similar in cost. Sump pump installation (including pit excavation) runs $1,500 to $4,000. Rain drain systems connecting downspouts to a dry well or storm drain are $1,500 to $3,000.

Land and Lot Clearing

Land and lot clearing removes trees, brush, stumps, and vegetation to prepare a site for construction.

Typical cost in Portland: $3,000 – $10,000

A standard residential lot (5,000-10,000 sq ft) with moderate brush and a few trees is on the lower end. Heavily wooded lots, lots with large trees requiring permits, or commercial parcels are higher. The cost includes clearing, stump removal, debris hauling, and rough grading.

Dirt and Gravel Hauling

Dirt and gravel hauling covers soil removal, fill dirt delivery, and gravel installation.

Cost depends on volume. Most hauling is priced by the truckload or cubic yard. A standard dump truck holds approximately 10-12 cubic yards. Costs include the material (for fill or gravel), transportation, and placement/spreading.

Debris Removal and Site Cleanup

Debris removal and site cleanup is often included in larger excavation projects but can be booked as a standalone service.

Cost depends on volume and material type. Recyclable materials like concrete and metal have lower disposal costs than mixed construction waste. Most residential cleanup jobs run $500 to $3,000 depending on the amount of material.

How to Get an Accurate Estimate

Price ranges are useful for budgeting, but the only way to get an accurate number for your specific project is to have a contractor visit your site. A good excavation estimate should include a site visit (not a phone quote), a detailed breakdown of what's included (labor, equipment, materials, hauling, cleanup), the timeline, and any assumptions about soil conditions or access.

At A&N Construction and Excavation, we provide free, detailed estimates for every project. We walk the site with you, discuss the scope, and give you a clear number before any work begins — no surprises, no hidden fees.

Get Your Free Estimate

If you're planning an excavation project in the Portland metro area, call us at (503) 983-6984 or request a free estimate online. We serve Portland, Beaverton, Hillsboro, Tigard, Lake Oswego, West Linn, Oregon City, Milwaukie, Gresham, Clackamas, Happy Valley, Tualatin, Sherwood, Wilsonville, and surrounding cities.