Foundation installation in Antioch CA - built for the soil your house sits on
Need a foundation under a new house, addition or garage? We price it from the soil study and design, then pour it to match.
- Licensed and fully insured.
- Free on-site estimates.
- Replies within 1 business day.
What does it take to put in a new foundation in Antioch?
Foundation installation in Antioch means building the concrete base that carries the weight of your house, addition or building. On soil that swells and shrinks, that base is also built to limit the damage when the ground moves.
Most people calling about a foundation have plans drawn or close to it, and they want to know what it'll cost and how soon it can go in. The price turns mostly on the size of the building, the type of foundation the design calls for, how much the lot slopes, what the soil study asks for and how easily we can get a concrete truck to the spot. The schedule depends more on what comes before the pour, like the soil study, the design and the city's review, than on the pour itself. If you're building something smaller with one flat floor, our slab foundation building page may be closer to your job, and either way your own number comes from the written estimate I send after I walk the site.
What should you look for on your lot before a foundation goes in?
Wide cracks in dry dirt
If your yard opens up in cracks you can slide a finger into by late summer and closes again after the rain, you've likely got clay that swells and shrinks. That ground pushes and drops whatever sits on it, and a foundation poured without a plan for it shows that later in cracked floors and doors that stick.
A lot that isn't flat
A slope changes how much digging and forming the job takes, and it can change which kind of foundation makes sense at all. Finding that out after the framer is booked usually means waiting on a redesign, so we want to see the grade before anyone prices the job.
An old floor heaving up
Cracks running through an old slab, floors that roll underfoot and doors out of square usually mean the ground moved under a base that wasn't built for it. It tends to get worse with every wet and dry season, and sometimes foundation raising is worth a look before a full replacement.
How we approach foundation installation
I don't guess at a foundation, so before we price one we want the soil study and the design in hand. On ground that moves, plenty of foundation designs can work, and the choice among them should come from an engineered soil study, which comes before the design and belongs early in your plan. Once we have both, we price what the design calls for, get the grade and layout right before the truck shows up and build it the way it's drawn. The part under the concrete is hidden on day one and it's the first thing people want to cut from a budget, but you can't fix it once the concrete is down, so that's the last place we'd save money. I'll also tell you up front that no foundation on moving soil sits perfectly still.
A foundation rarely stands alone. Porches, columns, garden walls and additions often sit on concrete footings, and we can pour those as part of the same job so everything ties to one layout. If you own a small business and you're putting up a building, we can price the concrete parking lot around it on the same site visit.
Floor isolated from the soil
One way to handle moving ground is to keep parts of the foundation, often the floor, from bearing on the soil so its movement doesn't reach them. It suits owners who want the most separation from the ground, but it usually costs more, can need more engineering and higher fees, and the extra building time can stretch the whole schedule.
Foundation built to handle movement
The other path keeps the foundation on the ground and uses details that help control what the movement does to it. It's usually the simpler build, and the soil study and design decide which details yours needs.
Get a written price for your new foundation
Send the form and we'll get back to you within one business day. I come out myself, measure the site and send a written estimate. It's free, and there's no pressure to book.
Call (925) 503-1201- Based in
- Antioch, CA 94509
- Hours
- Mon–Sun: 6 AM–11 PM
What happens after you call about a foundation in Antioch?
Here's how a foundation job runs on your end, from the first call to the walk-through, and who you'll deal with at each step.
Call or send a message
Call (925) 503-1201 or send the form and tell us what you're building and where. We'll set a time for me to come out to the property.
I walk and price it
I come out myself, look at the site, what's around it and how we'll get concrete to it, then send you a written estimate priced from your soil study and design. That written price is the number to plan around, not a guess off a phone call.
We permit, pour and finish
Once you say go, we sort out what the city or county needs, set forms, pour and finish. Then I walk the finished foundation with you before we leave.
Why Antioch homeowners call Excel Antioch Concrete Company for foundations
The owner prices and pours it
I come out myself to look at the job and give the estimate, and my crew and I do the work. The person who told you what to expect is the one standing there when the concrete comes off the truck.
Licensed and fully insured in California
In California, forming, pouring and finishing concrete takes a contractor's license, and the only work that skips it is a minor job under $500 total for labor and materials that isn't part of a bigger project. A foundation is well past that line, and we're licensed and fully insured.
Raised on my dad's jobs
I learned this trade working my dad's jobs from the time I could push a wheelbarrow, and I started this business in 2023 after years of pouring and finishing next to him. That's where the habit of getting the ground right before the truck comes from.
On a foundation, the ground and the design for it matter more than anything you'll see when it's done, so start with those and ask us for an estimate.
Foundations, footings and city rules in Antioch
Before a foundation goes in here, the City of Antioch strongly encourages owners to talk with its Planning Division early, before plans are submitted or work starts, so you know which development standards apply to your lot. The city also issues the building permit. If your lot sits in a state liquefaction zone, where loose, wet ground can lose its strength in an earthquake, the soil under the foundation has to be investigated and the house built with countermeasures, and cities have to use those zones when they issue permits. None of that can wait until the forms are set, so before we start we check with the city or county office that handles your address, and if a permit is needed we apply for it as your contractor or help you through it if you'd rather file it yourself.
We're based in Antioch and work in the cities around it, and a lot of the yards we dig in have clay that cracks open in a dry summer and swells back in winter. We see the same ground on jobs in Pittsburg and Brentwood, which is why we ask for the soil study before we price a foundation.
Questions about foundation installation in Antioch
Call (925) 503-1201Foundation installation in the San Francisco area usually costs about $10,000 to $35,000 per project, and that's an area guide, not our price. Where yours lands depends on the building's size, the type of foundation, the slope, what the soil study calls for and whether the design isolates the floor. For a price on your own house, I walk the site and send a written estimate.
Lean toward a slab if moisture worries you most and your lot is fairly flat, and toward a crawl space if the ground is uneven. A slab gives good moisture control but isn't ideal on graded land, while a crawl space handles uneven ground well but is prone to moisture problems. Your slope and the soil study usually settle it.
On soil that swells and shrinks, yes, a little, and you should plan for it. A slab that never moves and never shows cosmetic cracks on that kind of ground would cost too much to build and likely can't be built at all. What the design does is limit the damage when the ground moves.
You apply through Antioch's Online Permit Portal. If you're unsure what your project has to submit, the city's Building Division answers those questions at (925) 779-7065. Even a small shed falls outside the city's portable-shed exemption once it sits on a permanent foundation.
A "B" general contractor can take on the concrete work if it holds the concrete classification itself or hires a properly licensed concrete contractor to do it. It's fair to ask your general contractor which one applies to your job, and we can be that concrete contractor on your project.
Have the property address ready, along with whether the lot is flat or sloped and any soil study or plans you already hold. The slope points toward a foundation type, and the soil study is what the design and my price are built on, so having them up front saves a second trip. Call (925) 503-1201 or use the form when you're ready.
Other concrete work that goes with a foundation
Concrete footings
Adding a porch, deck, garden wall or room? Footings are the buried concrete that carries that weight into the ground before anything goes on top.
Concrete parking lot building
Putting up a shop or office building? A concrete parking lot gives customers and delivery trucks a hard, flat place to park that drains away from your door.
Where we install foundations around Antioch
Excel Antioch Concrete Company is based in Antioch, CA, and installs foundations in the cities around it, from Concord out to Discovery Bay. The 12 cities below have their own pages, and we work in plenty of places in between.
Antioch, CA
Get a foundation estimate for your lot
The sooner the soil study and design are in our hands, the sooner I can put a real price on your foundation.