Slab foundation building in Kirkland WA - a packed base and steel placed right
Planning a garage, shop or addition on bare ground? We prep the ground, set the steel and pour a slab ready to build on.
- Licensed and insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
How is a slab foundation built in Kirkland?
Slab foundation building in Kirkland, WA, means getting the ground ready, setting steel sized and placed inside the slab, pouring the concrete, and then protecting it through curing, the wait while it gains strength before anyone builds on it.
Most people who call about a slab have a garage, a shop or an addition in mind and a patch of ground that isn't ready for it yet. The price moves with the slab's size and thickness, how much digging it takes to reach firm subgrade, the ground the slab sits on, how much steel goes in and how easy it is to get a truck to the spot. The schedule mostly turns on permits and weather, and your written estimate gives you the figure for your own lot.
How do you know it's time for a new slab foundation?
Cracks you can fit a coin in
Hairline cracks are normal, but a wide one, or one side sitting higher than the other, usually means the ground underneath moved or there's no steel holding the slab together. Left alone, water gets in, the gap grows, and whatever is built on top moves with it.
A floor that slopes or sinks
If a marble rolls to one corner or a door starts dragging, the base under that corner was probably raked level instead of dug out and packed, so it's settling with the dirt. Waiting rarely helps, because the longer it goes the more of the slab you end up replacing.
Water pooling against the house
Puddles that sit at the edge of an old slab or run toward the wall usually mean nobody checked which way the water would go. Over a few wet winters that water softens the ground underneath, which is how a drainage problem turns into a settling one.
How we build a slab foundation, start to finish
We dig out the soft material, pack the base in layers and check where the water runs so the slab doesn't send it toward the house. Then we set the forms and the rebar, the steel bars that hold the slab together once it cracks, and I go over with you how that steel will be sized and placed so the cracks that do show up stay tight. If a cold spell is coming, we plan how to protect the slab before the truck is booked, not after. We pour early in the day, because a pour in midday heat can leave a weak, dusty top, then finish the surface and keep it protected while it cures. If the budget gets tight, cut the fancy finish before you cut the base, because nobody sees the base on day one and everybody sees it the year the slab settles.
Some builds need more than a slab on the ground. If your plans call for walls, a crawlspace or a full perimeter under the house, that's our foundation installation work, and small property owners who also need a paved lot for tenants or customers can ask about concrete parking lot building while I'm out looking at the slab.
Garage and shop slabs
These carry cars, benches and heavy tools, so we pay the most attention to the base at the door and wherever a big load will sit. A smooth troweled top is easiest to sweep, and a broom finish, light grooves dragged across the surface, gives better grip where it gets wet.
Slabs for a home addition
The new floor has to meet the old house at the right height and keep water moving away from both, so we check the existing grade before a single form goes in. Expect more hand work where the new slab meets the old foundation.
Slabs poured inside footings
On some lots it makes sense to pour concrete footings first and the slab inside them, rather than one piece with thickened edges. Which way fits your lot and your plans is something I'll tell you once I've seen the ground.
Get a written estimate for your slab foundation
We reply within one business day, then I come out, look at the lot with you and send a written estimate. It's free, it's done on site, and there's no obligation to go ahead.
- Based in
- Kirkland, WA 98033
- Hours
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 8 AM–9 PM
What happens after you call about a slab foundation?
Here's how a slab job runs from your first call to the final walk-through, and where the city's review fits if your lot needs a permit.
Call or send the form
We get back to you and set a time for me to come out to the lot. Have the address handy, plus a rough idea of the slab size and what's going on it.
Walk the lot together
I look at the site with you, check which city or county office covers your address, then send a written estimate. It lays out what the job includes, so you can see where the money goes before you decide.
Wait on the city's review
If your lot needs a critical area permit, the start waits on the city, and Kirkland's fees and review times depend on the project's size and the type of critical area. We plan the start date around the approval and the inspections.
Prep, pour and walk it
We get the ground and forms ready before the concrete arrives, then pour and finish with me on site alongside the crew. At the end we walk the job with you.
Why Kirkland owners call Precision Kirkland Concrete for slab work
I write the estimate myself
I come out to look at the job and write the estimate, and I'm on site with our crew when we pour. The person who promised you a packed base is standing on it when the truck shows up.
Building concrete since 2020
I learned on small pours and other people's crews before starting this business in 2020, and the lesson that stuck is that most concrete trouble starts under the slab. That's why our estimates spell out the digging and packing instead of leaving them vague.
Licensed and insured, look us up
We're licensed and insured. Washington lets you look up any contractor before you sign, and the last question below shows you where.
On a slab, the work you can't see matters most, so let's start with your ground. Ask for your estimate or call (425) 285-8195.
Slab foundations and site work in Kirkland
In Kirkland, work within a geologically hazardous area needs a critical area permit from the city, and that ground includes land prone to landslides or severe erosion and ground that can liquefy in an earthquake. Whether your lot falls in one is the city's call, not mine, so we check before we price the job and never assume it's clear. Kirkland permits are applied for online through MyBuildingPermit.com, and when your job needs one we can file it for you or help you file it. The city's Development Services Center at 425-587-3600 is the place to call with permit questions.
Plenty of lots around here slope toward the lake or a ravine, and our rain has to go somewhere, so we check where it runs before the forms go in. We see the same sloped lots on jobs in Bellevue and Redmond, and we take work across King County and south Snohomish County. If your city isn't listed, call and ask.
Questions about slab foundations in Kirkland
How much does a slab foundation cost in Kirkland?
In Seattle, an installed slab foundation usually costs about $9 to $17 per square foot, which is a useful starting point if you're in Kirkland. The digging, the base, the steel, access for the truck and any permit work are what move a job's price. Your written estimate gives you the figure for your lot.
Will my new slab foundation crack?
Probably a little, and that's normal. Concrete industry guidance says reinforcement won't prevent cracking, but steel that's properly sized and located keeps the cracks that do occur tightly closed. We also cut control joints, shallow grooves sawn into the top, so cracks tend to land on a line we chose instead of across the middle of your floor.
Can a concrete slab be poured in cold weather?
Yes, as long as it's protected. A cold weather concreting guide treats it as cold weather when the air has fallen to, or is expected to fall below, 40°F during the protection period after the pour. If your pour lands in the cooler months, ask how the slab will be protected through that stretch, and we'll walk you through our plan.
How do I find out if I need a critical area permit in Kirkland?
Start with the city's GIS Interactive Maps for a general idea, then contact the city early to confirm, because the maps alone won't settle it for your lot. The city's critical area guidance also says properties within 125 feet of streams and 300 feet of wetlands should be assessed by a qualified professional. Send us what the maps show with your estimate request, and I'll work it into the plan.
Will Kirkland require a geotechnical report for my slab?
It might, because the city may require a geotechnical report with any land surface modification permit application. When it does, a qualified geotechnical engineer or engineering geologist prepares it, and we build the base and steel to what the report and the approved plans call for.
How do I check a concrete contractor's license in Washington?
Look the company up in the Verify a Contractor, Tradesperson, or Business tool from Washington's Department of Labor & Industries, because the state requires every construction contractor to register with L&I. It's worth doing before you sign with anyone, us included.
Foundation and site work that goes with a slab
Foundation installation
When your build needs walls, a crawlspace or a full perimeter under the house instead of a slab on grade, this is the job that carries it.
Concrete parking lot building
Small property owners pouring a building slab often need paved parking beside it, built on the same packed base and planned for where the water goes.
Cities we serve for slab foundations
Precision Kirkland Concrete is based in Kirkland, WA, and builds slab foundations across the 12 cities listed here, from Bothell to Woodinville. Those are the cities with their own page, and we take jobs in others nearby too.
Kirkland, WA
Send us your lot and slab size
With your address, the planned size and what the city's maps show, I can look into your lot before I come out, so the estimate starts from what the ground needs.