What Are Grading Services in Portland, OR?
If water pools near your foundation after every Oregon rainstorm, your yard may need grading services Portland OR homeowners rely on to redirect runoff and protect their property. HD Landscape and Maintenance provides professional land grading, lot leveling, and drainage correction for homes throughout Portland and the surrounding metro area. Oregon LCB Licensed #9977 — call (971) 336-5520 for a free estimate.
By Donavan Hesedahl, Owner · Last updated 1st July 2026
What Is Land Grading?
What is land grading? It is the process of reshaping and leveling soil across a property to control how rainwater flows — guiding runoff away from structures, preventing erosion, and creating a stable, even surface for lawns, driveways, patios, and planting beds. Grading is one of the most foundational outdoor projects a Portland homeowner can invest in because every other landscape feature — sod, hardscaping, a new planting bed — performs better when the underlying slope is working in your favor.
Many Portland homeowners confuse grading with excavation. Excavation means removing large volumes of earth, typically for foundations, basements, or utility trenches. Grading moves and reshapes existing soil to adjust slope and surface contour without necessarily removing material from the site. In practice, grading projects often involve both: excavating slightly from high spots and filling low areas with screened topsoil or compacted fill to achieve the target grade.
Portland's Willamette Valley soils make grading both especially important and technically demanding. The region's heavy clay content means water moves slowly through the ground, saturates quickly during Oregon's long wet season, and expands when wet and shrinks when dry. Without proper grading, these cycles cause foundation settlement, water intrusion, and moss-covered, patchy lawns that never fully recover. Our landscaping and design services treat grading as the starting point — not an afterthought — on every project where drainage is a concern.
When Do You Need Grading Services?
When do I need grading services? The most common trigger is visible water — standing puddles that persist in the yard for hours or days after rain, wet patches against the foundation, or basement moisture that only appears in winter. But several other signs should prompt a grading assessment even before water damage is visible:
Your yard slopes toward the house. The correct grade runs away from any structure at a minimum 2% slope — roughly 2 inches of drop per 10 horizontal feet. When soil settles over time or was never graded correctly after construction, this slope often reverses. Water follows gravity toward the foundation, and from there into crawl spaces and basements.
Erosion on sloped areas. Portland homeowners in the West Hills, Sellwood-Moreland, and Hillsdale neighborhoods frequently deal with steep slopes where winter rain strips topsoil and creates runnels. Proper grading — combined with erosion control planting — stabilizes these areas before the damage becomes structural.
Uneven lawn after construction or renovation. New construction disturbs existing soil profiles. Builders compact subsoil and leave irregular surfaces that create drainage dead zones. If you moved into a recently built Portland home and the lawn looks patchy or collects water in low spots, the underlying grade likely needs attention before the lawn can establish evenly.
New hardscape installation. Any time a patio, walkway, or retaining wall goes in, adjacent grades need to be adjusted. Hardscaping changes the direction and volume of runoff. Without regrading around new structures, water concentrates in unexpected places and eventually damages both the hardscape and the surrounding lawn.
Whether you are searching for yard grading contractors Portland OR after a wet winter of basement problems or planning a new outdoor living space, HD Landscape evaluates your entire drainage profile before recommending a scope of work.
How Much Does Yard Grading Cost in Portland?
How much does yard grading cost? In the Portland metro, the price range for residential grading is wide — roughly $500 to $8,000 — because scope varies dramatically. Here is what drives the cost on typical local jobs:
Small yard drainage correction (500–1,500 sq ft, flat lot, minor slope adjustment): $500–$1,500. These are the most common calls we get — a backyard in Beaverton or NE Portland where one low corner collects water and a few yards of topsoil plus regrading fixes the drainage path entirely.
Mid-range lot regrading (1,500–4,000 sq ft, moderate slope, soil amendment needed): $1,500–$4,000. Typical for older Portland homes where the original grade has settled, or for West Hills properties where a contractor is correcting slope before laying sod or a patio.
Large or complex projects (steep slopes, erosion damage, multiple drainage zones, French drain integration): $4,000–$8,000+. Sloped lots in Southwest Portland and Multnomah County hillside neighborhoods regularly fall in this range, especially when the work involves French drain installation alongside regrading.
Portland's clay-heavy soil adds labor time compared to sandier soils common in other regions — clay is heavier, compacts differently, and requires more careful amendment to accept fill without creating drainage problems within the fill itself. This is worth factoring into any estimate you receive from yard grading contractors Portland OR.
As a rule of thumb for soil volume: raising a 100 sq ft area by 1 inch requires roughly 0.3 cubic yards of fill. A typical small backyard correction of 600 sq ft raised 2 inches across the low section needs around 3.5 to 4 cubic yards of screened topsoil. Our team specifies the exact volume after measuring your existing grade at multiple points.
Can Grading Fix Drainage Problems in the Portland Area?
Yes — grading is the primary structural solution for the majority of residential drainage problems in the Portland area. When water pools or flows toward a foundation, it is almost always because the ground surface slopes incorrectly or has settled into a bowl. Regrading corrects the slope so runoff moves across the yard and into a drain, swale, or street rather than sitting against the house.
Portland receives an average of 37 inches of annual rainfall, almost all of it concentrated between October and April. During that window, poorly graded yards do not get a chance to dry out between rain events — each storm adds to saturated soil that has nowhere to go. The compounding effect is why Portland homeowners often discover drainage problems in February that they had no idea existed in August.
For severe cases where regrading alone is not enough — steep slopes, high-water-table areas along the Willamette floodplain, or lots where surface grading cannot achieve adequate fall — we combine grading with drainage solutions including French drains and bioswales. These work together: grading directs surface water toward collection points, and subsurface drains move it out of the soil column before saturation occurs.
Do You Need a Permit for Grading in Portland, OR?
Yes, in most cases. Under Portland City Code Chapter 24.70, a site development permit is required for grading, clearing, and groundwork operations. The City of Portland's Permitting and Development office handles these applications, and the permit process includes review of grading plans, drainage impact, and erosion control measures.
Minor grading that poses no apparent drainage or erosion risk to adjacent properties may qualify for an exemption — but what qualifies as "minor" is determined by the City Administrator on a case-by-case basis, not by a simple square footage threshold. If your project involves significant slope adjustment, fill over existing drainage routes, or work near property lines, assume a permit will be required.
In Multnomah County, land grading services Multnomah County projects outside city limits follow county-level site development rules, which similarly require review for erosion and drainage impact on neighboring parcels.
HD Landscape handles permit coordination for all applicable grading projects. We prepare the required plans, submit the application, and schedule inspections — you do not manage the paperwork. Working with a licensed contractor is important here: Oregon LCB #9977 means our work meets the professional standards the permit review process assumes. You can verify Oregon Landscape Contractors Board licensing at oregon.gov/lcb.
How Long Does Yard Grading Take?
Yard grading timelines in Portland vary primarily with project size and soil condition, not the time of year you schedule the work (though timing affects soil workability):
Small drainage correction (backyard low spot, minor resloping): 1–2 days on-site including soil delivery, regrading, and compaction.
Moderate lot regrading (whole backyard or front-and-back combined, 2,000–4,000 sq ft): 3–5 days, including time for compaction to settle before final topsoil dressing and seed or sod prep.
Large or sloped projects (West Hills or hillside lots, multi-zone drainage correction, retaining wall integration): 1–2 weeks depending on equipment access and inspection scheduling.
The optimal window for grading in the Portland metro is late spring through early fall — June through September — when Oregon's dry season keeps soil workable. Late fall regrading is possible but risks compacting saturated clay, which creates the drainage problems you are trying to correct. Winter grading requires extra erosion control measures and is generally not recommended for large-scale residential work in Multnomah County.
Grading Services Across Portland and the Metro Area
HD Landscape provides lot grading Portland metro homeowners throughout the region count on after wet seasons or before major landscaping projects:
Portland — including Southwest, Southeast, Northeast, and North Portland neighborhoods
Lake Oswego — hillside and lakeside properties with complex drainage profiles
Beaverton — flat to moderate slope residential lots across Washington County
If you are looking for the best grading contractors near Portland OR, top rated land grading services in the Portland metro, or a contractor that specifically understands drainage in Willamette Valley clay soils — that is the work we have been doing across this region for years. And if you are asking which contractor handles drainage grading in Multnomah County specifically, HD Landscape serves the full county including inner Portland neighborhoods where lot grading and stormwater management intersect.
Frequently Asked Questions
Do I need a permit for grading in Portland OR?
Yes, in most cases. Portland City Code Chapter 24.70 requires a site development permit for grading, clearing, and groundwork. Exceptions exist for minor grading with no drainage or erosion impact on adjacent properties, but whether a project qualifies is determined by the City — not by a blanket square footage rule. If your grading project involves fill, slope adjustment, or work near property lines, plan for a permit. HD Landscape manages the permitting process for qualifying projects.
How long does yard grading take?
Small drainage corrections take 1–2 days. Moderate lot regrading projects run 3–5 days. Large or sloped properties with multi-zone drainage correction take 1–2 weeks. The best time to schedule grading in Portland is June through September when soil is dry enough to grade and compact without creating new drainage issues in saturated clay.
Can grading fix drainage problems?
Yes — grading is the primary structural fix for most residential drainage problems. Correcting the slope so surface water flows away from the foundation rather than toward it resolves the majority of standing water, basement moisture, and soggy lawn issues in Portland homes. For severe cases, grading is combined with French drains or bioswales to address both surface and subsurface water movement.
What is the difference between grading and excavation?
Excavation removes large volumes of earth — typically for foundations, basements, or utility work. Grading reshapes and levels existing soil to control slope and drainage without necessarily removing material from the site. Most residential grading projects involve moving soil from high spots to low spots and adding screened fill in areas that need to be raised, not excavating deep into the ground.
How much soil is needed for grading a yard?
A rough estimate: raising 100 square feet by 1 inch requires about 0.3 cubic yards of fill. A 500 sq ft low area raised 3 inches needs approximately 4.5 cubic yards of screened topsoil. HD Landscape measures your existing grade at multiple points before every project and specifies the exact volume needed — including accounting for compaction, which reduces fill volume by roughly 10–15% after settling.
Contact HD Landscape and Maintenance
HD Landscape and Maintenance 6581 SW 192nd Aloha, OR Phone: (971) 336-5520 Hours: Monday–Saturday 7 AM–7 PM · Sunday Closed Oregon LCB Lic. #9977 · Licensed & Insured · Serving Portland, Lake Oswego, Beaverton, Tualatin, Clackamas, and the full Portland Metro Area.
