Concrete Foundations in Redmond, WA
Seattle ConcreteCONTRACTORS
(206) 566-0528
Need footings, stem walls or a slab foundation in Redmond? Here’s how foundation work runs, what affects the price, and what we need to quote it.
- Built to stamped plans and inspections
- Footings sized for the soil you actually have
- Drainage and vapor barrier planned in
Get a foundation quote in Redmond
Tell us about the project. We’ll call or email to talk it through.
Concrete Foundations for Redmond properties
Foundation work is concrete where the drawings and the inspector set the rules. For an addition, a detached garage, a backyard cottage (DADU) or a large shed, the plans say how deep the footings go, how much steel goes in, and where anchor bolts and hold-downs sit. Our job is to dig, form, place steel and pour exactly to that plan, and to flag soil or water problems before the concrete goes in.
1970s through 2000s subdivisions, townhomes, and new construction around downtown and Overlake. We work across Education Hill, Grass Lawn, Overlake, Idylwood, Bear Creek, Willows/Rose Hill, Redmond Ridge and downtown.
Additions
Footings and stem walls that tie into an existing house foundation.
Garages and carports
Slab-on-grade with thickened edges, or footings and stem walls.
Backyard cottages (DADUs)
Foundations and slabs for detached accessory units.
Redmond conditions that affect your foundation
Soil and settling
The Sammamish valley floor has softer river soils and a higher water table than the surrounding hills. Valley-floor slabs need extra attention to base depth and drainage.
Slope and access
Education Hill and the hills around Overlake and Bear Creek have sloped lots and stepped back yards, which brings retaining walls and steps into many projects.
Homes and existing concrete
1970s through 2000s subdivisions, townhomes, and new construction around downtown and Overlake.
Details that help us price your foundation in Redmond
You don’t need answers to all of these. They’re the questions that shape the design and the price.
Plans
Approved or draft drawings, plus any soils report.
Structure
Addition, garage, ADU, shed or deck.
Site
Photos of the area, slope, trees and access.
Permit status
Applied for, approved or not started.
Schedule
When framing needs to start.
Existing foundation
For additions, photos of the existing foundation where the new one ties in.
Options to talk through
| Type | Good for | Keep in mind |
|---|---|---|
| Slab-on-grade | Garages, sheds, some ADUs | Needs a solid base, vapor barrier and thickened edges |
| Continuous footing + stem wall | Additions and wood-frame houses with a crawlspace | Two-stage pour; matches many older Seattle homes |
| Pier footings | Decks, porches and posts | Sized and spaced per plan |
Permits for concrete foundations in Redmond
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. Redmond’s Development Services Center makes the call for your property, and we’ll tell you what we expect before you commit.
Planning a new foundation in Redmond?
Call to talk it through, or send a few details and photos.
What concrete foundations 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.
| Foundation work | Typical range |
|---|---|
| Slab-on-grade (base, vapor barrier, rebar, pour) | $6–$14 per sq ft |
| Continuous footing | $40–$90 per linear ft |
| Stem wall + footing | $80–$150 per linear ft |
| Foundation repair or underpinning | $5,000–$20,000+ per project |
Typical market ranges, not a quote from Seattle Concrete Contractors. These are ranges other Seattle-area concrete contractors publish for this work (Seattle Concrete (seattleconcrete.com) service pages, checked November 2026). Your price depends on size, access, removal, base work, finish and permits, and on conditions at your Redmond property. We give a written quote after we understand the job.
Concrete Foundations in Redmond: quick answers
Do you work from engineered plans?
Yes. Foundations are built to the approved plans and inspected. If you don’t have plans yet, your designer or engineer comes first.
How long does a foundation take?
Excavation, forming and steel take most of the time; inspection timing and cure time set the rest. Small jobs can be a week or two.
Do I need a permit for concrete work in Redmond?
Ground-level patios and walks are often exempt, but retaining walls over 4 ft from the bottom of the footing and anything in the right-of-way, such as sidewalks and driveway aprons, need permits. Redmond’s Development Services Center can confirm for your lot.
Learn more about concrete foundations
See the full concrete foundations guide, or all concrete services in Redmond.
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