Lot Grading in Tigard, Oregon

Quick Verdict

Lot grading in Tigard is the shaping of a property so it drains correctly and provides a stable base for a home, driveway, or yard. Tigard sits on gently rolling terrain in the Tualatin Valley, with Fanno Creek and its tributaries winding through, which means a mix of sloped lots and low, creek-adjacent ground on tight suburban parcels. Grading here has to establish positive drainage away from structures, carry water to the street or storm system, and respect the drainage and floodplain concerns near Fanno Creek. The fine valley soils drain slowly and hold winter moisture. Whether you are prepping an infill lot or fixing drainage on an older Tigard property, the grading works with the rolling ground and the creek.

What Lot Grading Does

Grading turns raw or awkward ground into a buildable, drainable lot. It cuts the high spots, fills the low ones, and sets a slope that sends water where you want it. On a new build it creates the compacted pad; on an existing lot it corrects drainage and makes the yard usable.

The guiding rule is positive drainage away from the foundation. In Tigard, with its rolling grade and slow clay-heavy valley soil, that slope keeps crawlspaces dry and foundations stable. The rolling terrain actually helps in one way, there is natural fall to work with, but it also means lots often need cut and fill to create a level building area, and on a tight suburban lot there is not much room to move that dirt around.

Tigard's Rolling Terrain and Creek

Tigard is not flat like parts of Hillsboro and not steep like the West Linn hills. It rolls, with gentle rises and low draws, and Fanno Creek threads through the city. That shapes grading in specific ways:

• Rolling lots often need cut and fill to create a level pad
• Fine, clay-heavy valley soils drain slowly and hold winter moisture
• Low areas near Fanno Creek can be wet and drainage-sensitive
• Creek-adjacent lots may face floodplain or buffer rules
• Tight infill lots leave little room to stage soil or run big machines

The creek is the local wrinkle. Fanno Creek and its tributaries carry the area's drainage, and lots near them can be low, wet, and subject to stream-buffer or floodplain rules. Grading near the creek has to keep water managed without violating those protections. Our Oregon excavation contractor guide covers how valley soil and waterways drive earthwork.

The Grading Process

A Tigard lot grading job typically follows this sequence:

Step	Purpose
Evaluate lot	Read slope, soil, and creek proximity
Clear and strip	Remove vegetation, save topsoil
Rough grade	Cut and fill to create a level pad
Compact	Firm fill in lifts for stability
Fine grade	Set exact slopes and drainage falls
Drainage	Add drains where slow soil needs help

Because Tigard's lots roll, cut-and-fill slope balancing is common: soil cut from a high spot fills a low one on the same lot, creating a level pad while keeping haul-off down. That matters on a suburban lot, where trucking dirt in or out is one of the bigger costs. On lots with real slope, retaining and careful drainage keep the graded pad stable.

Drainage and Slope to the Street

In Tigard, grading manages both slope and slow-draining soil. The rolling terrain gives water a path, which helps, but the fine valley soil does not absorb water quickly, so surface slope has to be paired with a place for the water to go. On most suburban Tigard lots that means grading the yard to fall toward the street or a storm connection, with swales to channel runoff, catch basins to collect it, and pipe to carry it out.

On sloped lots, an added concern is directing runoff so it does not concentrate and erode or dump onto a neighbor's downhill property, which on a tight lot line is a common source of disputes. Good grading spreads and controls the flow. Near Fanno Creek, drainage has to reach the creek system properly without eroding the bank or violating buffer rules. This same rolling-terrain drainage picture applies just south in lot grading in Tualatin.

Permits and Local Rules

Grading in Tigard can require a permit, especially for significant cut or fill, slope work, a new build, or any work near Fanno Creek. The city and Washington County set grading and drainage standards, and larger disturbances trigger erosion control to keep sediment out of the creek. Creek-adjacent lots may face stream-buffer or floodplain review, and lots in mapped sensitive areas can have added restrictions.

Because of the creek and the rolling terrain, and because thresholds vary, checking requirements before major grading is smart in Tigard. A contractor handles the permitting and erosion control as part of the project, and manages the extra care that creek-side lots require.

What to Expect on Job Day

A Tigard grading job usually opens with the crew stripping and stockpiling topsoil so it can go back on top at the end. The machine rough-grades the pad, cutting the high side and filling the low side, and the fill is compacted in lifts rather than dumped loose so it does not settle under a slab or driveway later. Then comes fine grading to set the exact falls, drainage features where the slow soil needs them, and erosion control like silt fence around the disturbed area. On a tight suburban lot, expect careful staging of soil and machines in a small footprint, and expect the crew to protect the street and neighbors from tracked mud.

What Drives the Cost

Lot grading cost in Tigard is driven by lot size, the amount of cut and fill the rolling terrain requires, the soil, drainage needs, and creek proximity. A gentle regrade is affordable; a sloped or creek-adjacent lot needing cut, fill, and drainage costs more. Planning baselines only.

Unit	Baseline Range
Grading / leveling, per sq ft	$0.75 - $4.00+ per sq ft
Excavator plus operator, hourly	$150 - $350+ per hour
Crushed gravel, delivered, per cu yd	$45 - $110+ per cu yd
French drain, per linear foot	$15 - $120+ per linear foot
Minimum job callout	$500 - $1,500+

Industry Baseline Range: a small, gentle regrade sits at the low end, while a sloped or creek-adjacent lot needing real cut, fill, drainage, and haul-off runs well above it. Most small jobs carry a minimum callout.

These are industry baseline ranges for planning only -- actual pricing depends on site conditions, soil, access, depth, haul-off, and current market conditions. Get a site-specific quote.

Current Market Reality

Real costs often run 2 to 3 times baseline when wet clay, imported fill, drainage work, permits, or creek-side rules hit. In Tigard, the common surprises are more haul-off than expected on a lot that will not balance its own cut and fill, drainage features the slow soil forces, and the extra review and erosion control that come with a creek-adjacent parcel. Most Tigard grading is scheduled for the drier May through October window, when the fine valley soil firms up and creek levels drop.

The Bottom Line

Lot grading in Tigard means shaping rolling terrain into a level, well-drained pad while respecting Fanno Creek and the slow valley soil. Balance cut and fill, pair slope with drainage to the street, and handle creek-side rules, and the site drains and builds well. As a CCB licensed and insured Oregon contractor working statewide since 2009, Cojo grades lots across Tigard and the Tualatin Valley. See our excavation services or request a free estimate to plan your project.