Paver Installation in Tacoma. Built for Western Washington, Not Phoenix.

A paver surface is a layered system, and the pavers are the thinnest part of it. The finished surface you walk on is the top two or three inches. Everything that decides whether it stays flat sits underneath.

The Interlocking Concrete Pavement Institute (ICPI) publishes the construction guidance most professional installers work from. Its minimum compacted base is 4 inches for sidewalks and patios and 6 inches for residential driveways, with a bedding layer of about 1 inch on top. Those are minimums for good soil. Wet or weak ground calls for more.

Most of the paver advice online is written for places where frost is the enemy. Around Tacoma the bigger problem is water. NOAA's 1991-2020 climate normals put annual precipitation at Sea-Tac Airport, the closest long-record station, at 39.34 inches, and roughly three-quarters of it falls from October through March. A base that holds water for six months loses strength for six months.

Many lots in the Puget Sound lowlands sit on glacial till: a dense, packed mix of clay, silt, sand, and stones that the ice sheet compressed. Washington State University's Puget Sound low impact development manual notes that on till soil, rain turns into surface runoff quickly instead of soaking in. In practice that means water reaches the bottom of your base, finds a hard layer, and sits there.

So the job here is less about stopping frost heave and more about giving water a way out: a surface pitched away from the house, a base that drains, fabric that keeps the base clean, and a plan for where the runoff ends up. When we pull a soil sample before design, this is what we are looking at.

Paver base is the question to ask first, for a reason. It is also where cheap bids save the most money and where most failures start.

Good base rock is crushed and angular, with a range of particle sizes so it packs tight. Round rock such as pea gravel rolls under load and never locks up, which is why it does not belong in a paver base. The rock goes down in layers and each layer is compacted before the next one goes on. One thick uncompacted lift will settle for years.

ICPI's construction specification recommends a stabilized base, bound with cement or asphalt, over weak or saturated subgrades and under very heavy loads. Most Tacoma patios do not need that. Some driveways on soft, wet ground do. Your soil test and how the area will be used decide which one you get, not a standard number on a bid sheet.

Hardscaping is the built part of a yard: paving, walls, steps, and outdoor rooms, as opposed to plants and lawn. Many Tacoma projects combine two or three of these, and building them in one mobilization usually costs less than building them one at a time.

Most at-grade patios and walkways on private property are simple from a permit standpoint. A few situations change that, and a good contractor checks them before the bid, not after the dig.

Retaining walls are the most common trigger. The City of Tacoma exempts a wall only when it is 4 feet or less from the bottom of the footing to the top, has flat ground above and below it, carries no surcharge from a driveway, building, or fence, and sits on private property. In unincorporated Pierce County, check with Pierce County Planning and Public Works for its wall rules.

Stormwater can matter on larger jobs. Tacoma's 2021 Stormwater Management Manual, as clarified in a 2022 City policy memo, applies its first five minimum requirements to redevelopment projects that create 2,000 square feet or more of new plus replaced hard surface, or disturb 7,000 square feet or more of land. A full driveway replacement plus a new patio can get close to that line on a bigger lot.

Work in the public right-of-way, such as the sidewalk, planting strip, or the apron at the street, is the City's jurisdiction and needs separate City approval. And before any digging, Washington's dig law requires a utility locate request through 811 at least two business days ahead.

Bids for the same patio can look very different, and the difference is almost always underground. Price is easy to compare. Base depth, drainage, and who actually does the work are not, unless you ask.

Start with the state. Washington's Department of Labor and Industries runs a free Verify tool that shows whether a contractor is registered, bonded, and insured, and lists past infractions. Any contractor you hire for paving should show up there with an active registration.

If you are replacing an old installation, or vetting a contractor by driving past their past work, these are the patterns that tell you what went wrong underneath.

We do not publish prices, because the same square footage can cost very different amounts on two Tacoma lots. A flat, open backyard in South Tacoma and a steep, narrow lot in the North End are different jobs even at the same size.

The main cost drivers are size, base depth, soil condition, access for equipment, demolition of an existing surface, drainage work, slope and any walls or steps it requires, the paver product and pattern, and permits where they apply. A free on-site quote covers all of them for your property.

ND Brick Pavers has its office in Yelm, and our crews work across Tacoma, Pierce County, and nearby Thurston County, including Olympia and Lacey. The company has 19 years in the trade and 425 completed projects, holds Washington contractor license NDBRIDB815M5, and carries a 4.7 rating on Google.

Every project starts with a free site visit and soil test, then a free 3D design so you approve the actual layout, pattern, and color. Our own in-house crews do the demo, base, installation, and finishing, with no subcontractors. You get an itemized proposal before anything is scheduled.