Hardscaping Contractor Serving Sumner, WA

Sumner sits where the White River meets the Puyallup, and most of the town is built on what the rivers left behind. A few neighborhoods climb the valley walls onto glacial upland. A paver project in Sumner first needs to know which of those two worlds it is in.

In Sumner, as everywhere we work, the crew is ours, with no subcontractors. The company has 19 years in business, more than 425 projects, and a 4.7 Google rating, and runs its Pierce County jobs from an office in Yelm.

On a grid of points across Sumner in USDA soil survey data, the valley floor showed five different river soils within a few blocks of each other. Each one behaves differently under a patio or driveway.

Puyallup fine sandy loam is the friendly one: very deep and well drained, formed in recent river deposits. Sultan silt loam is moderately well drained with moderately slow permeability. Briscot loam is poorly drained, subject to occasional brief flooding from November through April, with an apparent water table 0 to 1 foot down in those months unless drained. Puget silty clay loam is also poorly drained, with water that can stand from 1 foot above to 1 foot below the surface from November to April. Snohomish silty clay loam is poorly drained and lies over buried organic material.

On the first two, a standard drained paver base works well. On Briscot, Puget, and Snohomish ground, a patio may need to be raised, the base wrapped in separation fabric, and a drain line run to a legal outlet. Permeable pavers rarely make sense where winter water sits at or near the surface. And on Snohomish soil, the organic layer below can compress under the weight of a driveway over time.

On the slopes that rise toward Sumner Ridge and the plateau, the survey maps Alderwood gravelly sandy loam on 15 to 30 percent slopes. Alderwood has dense till 20 to 40 inches down that perches water 1 to 3 feet below the surface from about December through April. Here the issue is not flooding but water moving sideways along the till and collecting behind walls and under the downhill side of patios. Retaining walls on these lots need drain rock and an outlet.

A 2024 flood mitigation memo published by the City of Sumner for a development site notes that Sumner Municipal Code section 15.52.070 adopts the 2017 Flood Insurance Study for Pierce County and its FEMA flood maps. The same memo describes Mud Mountain Dam, about 30 miles up the White River, as the flood control structure that limits river flows reaching Sumner.

For a homeowner, the point is simple: if your lot is in a mapped floodplain, fill and new hard surfaces can raise questions that a lot on higher ground does not face. Raising a patio with imported fill is a common way to get it out of the wet, and it is exactly the kind of change to clear with the city first. We check the address against the flood maps before we design.

Size matters for stormwater too. Under Ecology's model manual, replacing an old driveway counts the same as paving new ground, and the two together reaching 2,000 square feet, or 7,000 square feet of disturbed soil, bring in the first five minimum requirements. A driveway and patio project on a larger valley lot can reach that line.

NOAA does not publish a 1991-2020 normals station inside Sumner. The McMillin Reservoir station to the south averages 45.13 inches of precipitation a year, with about 16 inches from December through February. On the poorly drained valley soils, that water has nowhere to go but sideways or up, so winter is when weak bases fail.

Valley lots punish guesswork. Ask these before you sign with anyone.

Common Sumner requests and the service that fits:

In Sumner the soil test hole doubles as a water check: we note how deep we dig before the soil turns gray, mottled, or wet. Combined with a look at the flood maps, that tells us how high the patio or driveway should sit and where its water goes. The free 3D design shows those heights, and the free quote explains how size, base depth, soil, fill, drainage, demolition, access, and permits shape the price. Our own crew builds it and cleans up each day.