How Much Does Site Grading Cost? Oregon 2026 Guide

What Does Site Grading Cost in Oregon?

Site grading is the process of reshaping land to achieve proper elevations, slopes, and drainage patterns. It is a fundamental step in construction, landscaping, and drainage improvement projects. Whether you are building a new home, fixing a soggy yard, or preparing a commercial development site, grading sets the stage for everything that follows.

Oregon's hilly terrain, clay soils, and heavy rainfall make grading both especially important and sometimes more challenging than in flatter, drier regions.

| Grading Type | Cost Per Sq Ft | Cost Per Cubic Yard | Typical Project Cost | |---|---|---|---| | Yard regrading (drainage fix) | $1 - $3 | $5 - $12 | $1,000 - $5,000 | | Residential lot preparation | $2 - $5 | $5 - $15 | $3,000 - $15,000 | | Finish grading (construction) | $1 - $3 | — | $1,500 - $5,000 | | Commercial site grading | $1.50 - $4 | $4 - $10 | $10,000 - $100,000+ | | Road or driveway grading | $2 - $6 | $5 - $12 | $2,000 - $15,000 |

Types of Grading and When You Need Each

Rough Grading

Rough grading is the large-scale earthmoving that establishes the general shape and elevation of your site. This is the heavy-lifting phase, using bulldozers, excavators, and scrapers to cut high spots, fill low spots, and establish overall drainage patterns.

When you need rough grading:

• Preparing a building lot for new construction
• Clearing land and establishing usable terrain
• Major drainage corrections
• Creating building pads, parking areas, or athletic fields

Cost: $3-$8 per cubic yard of earth moved for standard soil conditions. A typical residential lot preparation moves 100-500 cubic yards.

Finish Grading

Finish grading is the precise final shaping of the site surface. It follows rough grading and brings the site to within 1/10th of a foot (about 1 inch) of the design elevation. Modern contractors use laser-guided equipment for this precision.

When you need finish grading:

• Before pouring concrete foundations, slabs, or driveways
• Before laying sod or seeding a lawn
• Before installing pavers or other hardscaping
• After rough grading to achieve final design elevations

Cost: $1-$3 per square foot, depending on precision requirements and site conditions.

Yard Regrading

Yard regrading specifically addresses existing properties where drainage, settling, or landscaping changes require reshaping the terrain. This is the most common residential grading project.

When you need yard regrading:

• Water pools near your foundation after rain
• Sections of your yard stay soggy for days after rain stops
• Neighboring property changes have altered water flow onto your lot
• You want to create level areas for patios, play areas, or gardens

Cost: $1-$3 per square foot for the affected area. Most residential yard regrading projects cost $1,000-$5,000.

Drainage Grading

Drainage grading specifically focuses on establishing proper water flow patterns across your property. It may be combined with French drain installation or other drainage infrastructure.

Key principles for Oregon:

• Minimum 2% slope (1/4 inch per foot) away from all structures
• Swales and drainage channels graded to at least 1% slope
• Surface water directed to approved discharge points (not onto neighboring properties)
• Compliance with local stormwater regulations

Cost: $1,500-$5,000 for most residential drainage regrading projects, not including additional drainage infrastructure.

Factors That Affect Grading Costs in Oregon

Volume of Earth to Move

The primary cost driver for grading is the volume of soil that needs to be cut (removed) or filled (added). This is measured in cubic yards.

Small adjustments (regrading a yard, adjusting drainage) involve dozens to a few hundred cubic yards. New construction site preparation can involve hundreds to thousands of cubic yards. The more earth you move, the lower the per-yard cost tends to be due to equipment efficiency.

Cut and Fill Balance

Ideally, the soil you cut from high areas can be used as fill in low areas, minimizing the need to import or export material. When cut and fill balance, you avoid:

• Soil import costs: $15-$30 per cubic yard delivered for clean fill
• Soil export costs: $10-$25 per cubic yard for hauling and disposal
• Trucking: $75-$125 per hour for dump trucks

A skilled grading contractor designs the site plan to balance cut and fill as closely as possible, saving potentially thousands of dollars.

Soil Conditions

Oregon's diverse soils affect grading differently:

Clay soils: Common in the Willamette Valley. Clay is heavy, sticky when wet, and difficult to compact to specifications. Grading clay sites during the wet season (October-May) costs 20-40% more due to equipment difficulties and compaction challenges. Most contractors prefer scheduling clay-site grading during the dry season.

Rocky soils: Found in Central Oregon and the foothills. Ripping rock adds time and equipment wear. Hard rock may require hydraulic breaking, adding $10-$25 per cubic yard to standard grading costs.

Organic soils: Found in lowland areas and former agricultural land. Topsoil and organic material must be stripped and stockpiled before grading begins, then redistributed over finished grades. This adds handling cost but preserves valuable topsoil for landscaping.

Fill material: If your site needs imported fill, quality matters. Engineered fill (tested and certified for construction use) costs $20-$35 per cubic yard delivered, compared to $10-$20 for general fill that may not meet compaction specifications.

Slope and Terrain

Steep terrain is inherently more expensive to grade:

• Flat to gentle slope (0-5%): Standard grading costs apply
• Moderate slope (5-15%): Add 15-25% to base costs
• Steep slope (15-25%): Add 30-50% to base costs; may need retaining walls
• Very steep slope (25%+): Custom engineering required; costs vary significantly. Retaining walls, erosion control, and specialized equipment add substantially.

Access and Site Conditions

Grading equipment is large and heavy. Site access affects cost:

• Open site with road access: Baseline pricing
• Limited access: Equipment must be transported in smaller pieces. Add 10-20%
• Wet conditions: Equipment on wet clay creates rutting and needs matting. Add 15-30%
• Proximity to structures: Working near existing buildings requires caution and smaller equipment. Add 10-20%

Grading for Specific Projects

New Home Construction

Site grading for a new home in Oregon typically involves:

1. Clearing and stripping: Removing vegetation and topsoil ($1,500-$5,000)
2. Rough grading: Establishing building pad elevation and drainage ($2,000-$8,000)
3. Utility trenching: Excavating for water, sewer, and electrical (see excavation costs)
4. Finish grading: Final preparation for foundation ($1,000-$3,000)
5. Landscape grading: After construction, establishing final yard grades ($1,000-$4,000)

Total grading cost for a typical Oregon home site: $5,000-$15,000, not including clearing or utility work.

Drainage Correction

Fixing drainage problems on an existing property is one of the most common grading projects in Oregon:

• Foundation drainage correction: Regrading soil away from the foundation. Cost: $1,000-$4,000 for a typical home.
• Yard drainage improvement: Establishing swales, regrading low spots, creating positive drainage. Cost: $1,500-$5,000.
• Combined grading + French drain: The most comprehensive solution. Cost: $3,000-$10,000 for grading plus drain installation.

Driveway and Road Grading

Gravel driveway and private road grading is a common Oregon maintenance task:

• Gravel driveway regrading: Redistributing and adding gravel, establishing crown and drainage. Cost: $500-$2,000 per 100 linear feet.
• New gravel road construction: Full grading, base material, and drainage. Cost: $3-$8 per linear foot for 12-16 foot width.
• Driveway approach grading: Establishing proper elevation at the street connection. Cost: $500-$2,000.

Commercial Site Grading

Commercial projects involve larger areas and stricter specifications:

• Parking lot pad preparation: $1.50-$3 per square foot for grading before paving
• Building pad preparation: $2-$5 per square foot with engineered compaction
• Stormwater management grading: Creating detention/retention areas, bioswales, and drainage channels. Often 15-25% of total grading cost.
• Mass grading (large-scale earthwork): $3-$8 per cubic yard for projects moving 1,000+ cubic yards

Permits and Regulations in Oregon

Grading Permits

Most Oregon cities and counties require grading permits based on the volume of earthwork:

• Portland: Permit required when grading disturbs 50+ cubic yards or occurs on slopes over 20%
• Other metro areas: Thresholds vary by jurisdiction (typically 50-100 cubic yards)
• Unincorporated county: County permits generally required for larger projects

Permit costs range from $100 to $1,000+ depending on project scope and jurisdiction.

Erosion Control

Oregon DEQ requires erosion control measures for any ground disturbance over 1 acre (1200-C permit). Even smaller projects may need erosion control under local ordinances. Common requirements include:

• Silt fencing around disturbed areas
• Stabilized construction entrance
• Inlet protection for storm drains
• Temporary seeding or mulching of exposed soil
• Construction stormwater management plan

These measures add $500-$3,000 to project costs depending on site size and sensitivity.

Drainage Impact

Oregon law prohibits directing stormwater onto neighboring properties. Your grading plan must maintain or improve drainage patterns relative to adjacent properties. This sometimes limits grading options and may require engineered drainage solutions.

Choosing a Grading Contractor

Look for these qualifications when selecting a grading contractor in Oregon:

• Oregon CCB license with excavation endorsement
• Insurance (general liability and workers compensation)
• Modern equipment including GPS or laser-guided grading systems
• References for similar projects in your area
• Clear scope of work detailing cut/fill volumes, compaction specifications, and final grades

Get at least three competitive bids and compare scope, not just price. The cheapest grading bid often reflects the least preparation or oversight.

Get a Free Grading Assessment

Every site has unique grading needs. Cojo provides free on-site assessments for grading projects across Oregon. We will evaluate your terrain, soil conditions, drainage patterns, and project requirements to provide an accurate, detailed estimate.

Schedule your free assessment or learn about our services. View our project gallery for examples of site work across Oregon, or check our service areas to confirm coverage in your area.