Slab foundation building in Redmond WA - built on firm, evenly packed ground
Building a garage, addition or house and worried the slab will crack? We check your lot first and pack the ground so it settles evenly.
- Licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
What does building a slab foundation in Redmond involve?
Slab foundation building in Redmond means we prepare and pack the soil, then pour a concrete slab on it, so the slab sits on ground that settles evenly and holds up against cracking.
Most people who call about a slab are building something on it, like a garage, an addition, a shop or a small house, and the slab is the part nobody sees again once the walls go up. The price turns on the slab's size, how much soft dirt has to come out and go back in as packed base, how level your lot is to start and how much steel goes inside. The schedule turns on the permit if your job needs one, the inspections, the weather and the wait while the concrete cures, which is the time it spends hardening before it can take weight. Your own numbers come in the written quote from the estimate, with each part of the job on its own line.
How do you know it's time to think about a new slab?
Cracks running across the slab
A crack that runs clear across an old garage or shed slab, often wider at one end, usually means the ground under it settled unevenly. Water gets into it every winter, so it keeps growing and the edges start chipping.
One corner sitting lower
If a corner has dropped and doors or shelves no longer sit level, the soil under that spot likely wasn't packed like the rest. Waiting lets it keep sinking, and whatever is built on top moves with it.
Water pooling by the slab
Puddles that sit along the edge after rain mean the ground runs toward the slab instead of away from it. That water softens the soil underneath over time, which is how settling starts.
Soft ground where you'll build
If the spot you've picked squishes underfoot or was filled with loose dirt, it won't hold a slab as it is. Finding that out before you book a framer costs a lot less than finding it after the pour.
How we build a slab foundation
The first thing I check is whether your lot suits a slab at all, and if it doesn't, I'll tell you instead of selling you one. When it does, our crew digs out the soft topsoil, brings in base rock and packs it in layers, because a base that's only raked level settles right along with the dirt under it. We check where the water runs on your lot so it drains away from the slab, set the forms and tie in rebar, the steel bars inside that help hold the concrete together, then pour early in the day so midday heat doesn't leave a weak, dusty top. Once it's finished, we cut control joints, shallow grooves that give the concrete a place to crack where we chose instead of where it likes. The base is the part nobody sees on day one and the first thing people want to trim from the budget. I won't trim it, because you can't fix bad prep once the truck has left.
If a slab isn't right for your ground or your building, foundation installation with footings and walls may suit it better, and I'll walk you through that at the same visit. Small property owners putting up a building often need paving around it too, and we handle concrete parking lot building with the same care for the base.
Get a line-by-line quote for your slab
We get back to you within one business day to set a time. I come out for a free, on-site estimate with no obligation, and you get a written quote with each part of the job listed.
(425) 285-8289- Mon–Fri: 7 AM–10 PM, Sat–Sun: 8 AM–9 PM
- hello@concretecontractorredmond.com
- Redmond, WA 98052
What happens when you call about a slab in Redmond?
Here's how a slab job runs from your first call to the cleanup, and what you'll have in hand before you decide anything.
Call or send the form
Tell us what you're building, roughly how big it is and where it goes on the lot. We call back to set a time for me to come out.
I look at your site
I walk the ground, measure and ask how you'll use the space, then send a written quote with each part of the job on its own line. You'll see what the prep costs next to the pour, so nothing hides inside one big number.
Set the date and permits
Once you say go, we pick a date and take care of the permit side if the job needs one. Redmond wants inspections requested throughout a permitted job and before anything gets covered up, so we book each one on time, because a skipped inspection can delay the project.
We build it, then clean up
Our crew digs, packs, forms and pours while I run the job on site from the prep to the cleanup. Before we leave, I go over when you can walk on the slab and when it can take heavier loads.
Why Redmond owners call Allied Redmond Concrete for slab foundations
On a slab, the ground under it decides how it holds up, so start with someone who'll look at your soil before naming a price. Ask for your estimate or call (425) 285-8289.
I look at your lot myself
I come out for the estimate, and once the job starts, I'm on site running it while our crew does the work. The person who saw your soil is the one watching the base get packed.
Trained on foundation crews first
I learned concrete working on flatwork and foundation crews, then started this business in 2021. Those crews taught me which shortcuts show up later, and we don't take them.
Licensed and insured in Washington
We're licensed and insured. Washington requires every construction contractor to register with the state's Labor and Industries department and to be bonded and insured to protect the public, and that's the bar for anyone pouring your foundation.
Straight answers about your lot
If I don't know something about your ground, I'll say so and go find out instead of guessing. Satisfaction guaranteed.
Slab foundations and site work in Redmond
In Redmond, the city issues building permits for new homes, additions and accessory buildings like garages, and its list names those projects, not slab foundations on their own. Its no-permit list covers private driveways and sidewalks up to 30 inches above the ground next to them and one-story detached buildings up to 200 square feet, and neither list settles a slab foundation by itself, so we confirm it with the city's residential permits office for your project. If it needs a permit, I'll tell you at the estimate, and we handle the application and inspection requests, whether that's with the city or the county. Clearing your lot or roughing out its shape for a building project takes a separate clear and grade approval that owners apply for with the city, and I'll flag it if your site work heads that way.
Redmond's code marks seismic hazard areas, land at severe risk of earthquake damage like settling and liquefaction, where loose soil loses its grip and moves like a liquid. That happens in loose, low-density soil, usually where groundwater sits close to the surface, which is exactly the ground a slab doesn't want. The city's hazard maps are only a general guide, and a qualified consultant decides in the field where a hazard area really starts and ends, so if your lot looks close to one, I'd rather you have that answer before we talk about a slab. We're based in Redmond and work in the cities around it, and we run into the same wet, soft spots on jobs in Kirkland and Bellevue.
Questions about slab foundations in Redmond
(425) 285-8289Is my lot right for a slab foundation in Redmond?
It is if the ground is level across the property and the soil compacts well, which Seattle-area guidance names as the conditions a slab needs. Where that holds, a slab is quicker and easier to build than other foundations, so labor costs come down a good deal, but a sloped lot is worth weighing carefully first. I'll tell you which side of that line your lot falls on at the estimate.
How much does a slab foundation cost near Redmond?
A slab foundation in the Seattle area usually costs about $9 to $17 per square foot installed. The prep and your lot's slope move it most, and your written quote shows each part on its own line.
Do I need a permit for a slab foundation in Redmond?
The city's permit list doesn't name slab foundations on their own, so it has to be checked for your project, and we do that before any work starts. If a permit is needed, we take care of it, as covered in the Redmond section above.
How long does a new concrete slab take to cure before I can use it?
You should be able to walk on a new slab within 48 hours, and waiting a week before heavier loads is the safer call, going by Seattle-area guidance. Concrete takes about a month to fully cure, so ask us which follow-on work fits into that month.
How do I keep moisture in a concrete slab from ruining my floors?
Plan for it before the pour, because water vapor rising through a concrete slab can make moisture-sensitive flooring glues or coatings fail. Floors can then loosen, warp or discolor, turn into a trip hazard and possibly lead to mold and odors. Tell me your flooring plans at the estimate so the slab is built with them in mind.
What should I ask a contractor before they pour a slab foundation?
Ask how they'll compact the ground under it, because how the soil is prepared matters more to the slab than anything else. Soil packed unevenly settles and cracks the slab, and a thicker slab or stronger concrete will still crack on poor ground.
Related foundation and paving work we do
Foundation installation
When your ground or your building plans call for footings and walls instead of a slab, this is the foundation we'd build for you.
Concrete parking lot building
For small property owners who need cars parked beside a new building, a lot built on a packed base that drains water off instead of holding it.
Service areas for slab foundation work
Allied Redmond Concrete is based in Redmond, Washington. We build slab foundations across the 12 cities listed here, including Sammamish and Woodinville, and in plenty of other places nearby.
Redmond, WA
Get your lot checked before the pour
Have your project type, how much the lot slopes and your flooring plans ready, and the first call will cover what shapes your quote.