Concrete Slabs in Tacoma, WA
Seattle ConcreteCONTRACTORS
(206) 566-0528
Need a garage, shed, ADU or hot tub slab in Tacoma? Here’s how we size the base and slab, typical prices, and what to send for a quote.
- Base and compaction sized to the load
- Vapor barrier and thickened edges where needed
- Flat or sloped to drain, as the use needs
Get a slab quote in Tacoma
Tell us about the project. We’ll call or email to talk it through.
Concrete Slabs for Tacoma properties
A slab is the simplest thing we pour and the easiest to get wrong. Flatness, thickness, base and edges change with what sits on it: a hot tub, a car, a shed, or a living space. We start with the use and the soil, then size the slab to match.
Early 1900s houses in the North End and Hilltop, mid-century homes across the city, and newer infill. We work across the North End, Proctor, Stadium District, Hilltop, Central Tacoma, South Tacoma, the Eastside, Northeast Tacoma and Point Defiance.
Garage slabs
Thickened edges, reinforcement and a slope toward the door.
Shed and studio pads
Level pads sized for the building.
ADU and cottage slabs
Slab-on-grade foundations poured to plan.
Tacoma conditions that affect your slab
Soil and settling
Soils vary across the city; low and filled areas near the tideflats and gulches are softer than the ridges. A soils question is worth asking on any slab that has settled before.
Yards and access
Older lots often have alleys, detached garages and narrow side yards, so access is part of the plan.
Rain and drainage
Old walks and steps that tip toward the house are common. New concrete should shed water away from foundations and basements.
Details that help us price your slab in Tacoma
You don’t need answers to all of these. They’re the questions that shape the design and the price.
Use
Garage, shed, ADU, hot tub or equipment.
Size
Length, width and any plans.
Site
Photos of the area, slope and access.
Existing
An old slab, pavers or lawn to remove.
Permit
Is it part of a permitted building?
Timing
When the building or tub arrives.
Options to talk through
| Slab | Typical use | Keep in mind |
|---|---|---|
| Utility / shed slab | Sheds, bins, equipment | Simple base and broom finish |
| Garage slab (monolithic) | Garages and carports | Thickened edges, rebar grid, vapor barrier |
| Slab-on-grade foundation | ADUs and additions | Built to plans and inspected |
| Hot tub pad | Spas | Flat and reinforced for heavy point loads |
Permits for concrete slabs in Tacoma
Foundations and slabs for additions, garages, ADUs and other buildings are part of the building permit, with inspections of footings and steel before the pour. Tacoma Planning & Development Services makes the call for your property, and we’ll tell you what we expect before you commit.
Planning a new slab in Tacoma?
Call to talk it through, or send a few details and photos.
What concrete slabs typically cost in the Seattle area
Ballpark numbers help you plan a budget before anyone visits. Use them as a starting point, not a promise.
| Slab | Typical range |
|---|---|
| Basic utility or shed slab | from about $5 per sq ft |
| Garage slab (monolithic) | from about $7 per sq ft |
| Slab-on-grade with base, vapor barrier and rebar | $6–$14 per sq ft |
Typical market ranges, not a quote from Seattle Concrete Contractors. These are ranges other Seattle-area concrete contractors publish for this work (Seattle-WA-Concrete and Seattle Concrete (seattleconcrete.com) published price guides, checked November 2026). Your price depends on size, access, removal, base work, finish and permits, and on conditions at your Tacoma property. We give a written quote after we understand the job.
Concrete Slabs in Tacoma: quick answers
How thick should a slab be?
It depends on the use: shed pads are thinner than garage floors, and structural slabs follow the plans.
Do I need a permit for a slab?
Slabs for garages, ADUs and enclosed buildings are part of a building permit. Simple pads and patios often aren’t.
Do I need a vapor barrier?
Under anything enclosed, yes. Outdoors, it depends.
Do I need a permit for concrete work in Tacoma?
Patios and walks on private property often don’t need a building permit, but retaining walls over 4 ft from the bottom of the footing and work in the right-of-way do. Tacoma Planning & Development Services has the final word.
Learn more about concrete slabs
See the full concrete slabs guide, or all concrete services in Tacoma.
Tell us about your project
A few photos and rough measurements are enough to start. If you’re not sure what the job needs, describe the problem and we’ll talk it through.
Call (206) 566-0528 or use the quote form at the top of this page.
Find us on Google Maps
Seattle Concrete Contractors | (206) 566-0528 | Seattle, WA