Foundation installation in Orange CA - a base built for your lot and your soil
Got plans and a lot but not sure whether you need a slab or a raised foundation? We'll match the foundation to your ground.
- Fully licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Will a slab do, or do you need it raised?
It mostly comes down to how your lot slopes, what the soil does, and whether you'll want to reach the pipes and wiring under the floor later.
A slab is usually enough when:
- The lot is fairly flat
- Your plans call for slab on grade
- Keeping the first build cost down matters
- You won't need under-floor access later
- No big grading or retaining walls needed
A raised foundation fits better when:
- The lot has a real slope
- A slab would need big retaining walls
- Leveling would mean hauling dirt away
- You want pipes and wiring reachable
- Remodels are likely down the road
How a foundation job goes with us
Call or send the form
Call (714) 787-1676 or use the form, and tell us where the lot is, whether it slopes and whether you have plans drawn yet.
A site visit booked
I walk the lot with you
I come out myself, measure and walk the lot with you, because a flat lot and a sloping one often call for different foundations.
A clear plan
You get it in writing
I send a written estimate that spells out what's included and what isn't, so nothing about the digging, forms or steel is left to guesswork.
A written estimate
Permit, forms and inspection
Once you say yes, we handle the permit and string-check the forms. The city inspects after footings are dug and forms are set, and we pour only after that.
A set pour date
Pour, clean up, walk through
City construction hours run 7 a.m. to 8 p.m. Monday through Saturday and 9 a.m. to 8 p.m. on Sundays and holidays, and we pour inside them. Then we clean up and walk the work with you.
A clean, finished site
What our foundation installation includes
Layout from your plans
We lay the foundation out from your plans and check it against the lot's corners and grade before any digging starts.
Footings dug and formed
We dig and form the concrete footings, the wider base the walls bear on, down to firm, packed ground.
Forms checked by string line
Every form gets a string line run down it before the truck backs in, because a form that's off stays off.
Rebar and anchor bolts
We set the rebar and the anchor bolts that tie the house to the foundation, ready for the city to inspect.
Vapor barrier and under-slab lines
On a slab, we lay the vapor barrier, a sheet that keeps ground moisture out, and leave room for plumbing and electrical lines.
Pour, finish and cure
We pour and finish the concrete, then let it cure, kept damp and protected so it gains strength before framing loads go on.
What shapes the cost of a new foundation?
The biggest swing is the type. A slab on a flat lot is usually the simpler job, while a raised foundation on a slope means deeper footings, more forms and more steel. After that, it's the size of the house, how much digging and dirt hauling the lot needs, whether a truck can reach the forms or we need a pump, and what your plans call for. The base is the first thing people want to cut because nobody sees it on day one, and it's the one cut I won't make, because everything else sits on it.
The ground here adds its own questions. Most of Orange County shares the same earthquake design grouping, some areas have expansive soil that swells, and state maps show zones where soil can act like liquid in a strong quake. If your lot sits in one of those mapped liquefaction zones, the permit process may require a study and steps to reduce the risk, which adds work before we dig.
Why Orange property owners call us for foundations
I learned this work under a foreman who ran a string down every form and made us tear out anything that was off, and I still do it his way. I've run this business since 2017, I come out to look at each job myself, and our own crew does the work from the first form to the final cleanup.
The part I care about most is the part nobody sees once the concrete is down, which is the ground, the forms and the steel. Builders and property owners call us for foundations, slabs and concrete parking lots, and if a piece of the job isn't worth doing, I'll say so. When you're ready to talk through your lot, call (714) 787-1676.
- The owner on every site visit
- Our own crew, start to finish
- Backed by our satisfaction guarantee
Get a written estimate for your new foundation
Tell us where the lot is, how it slopes and whether you have plans. We'll reply within one business day to set up a free on-site estimate, with no obligation.
(714) 787-1676Foundation questions we hear in Orange
How much does foundation installation cost in Orange, CA?
The price depends mostly on which foundation your lot needs, so I don't put a number on it until I've walked the lot and seen your plans. One engineering firm notes that slabs on grade generally take less labor and formwork than deep raised foundations, which keeps the first building costs lower. Your written estimate spells out what's included and what isn't.
How do I choose between a slab and a raised foundation for my lot?
Start with the slope, because one engineering firm advises a post-tensioned slab, one with steel cables pulled tight inside it, for fairly flat sites, where slabs are economical and fast to pour, and a raised pier and grade beam foundation for sloping lots. On a slope, the raised foundation avoids massive retaining walls and hauling dirt away, and its crawlspace, the open space under the floor, keeps plumbing, mechanical and electrical lines easy to reach for later repairs. I walk the lot with you before we settle on either one.
What is the best foundation for expansive soil in Orange County?
A trade group for post-tensioned slabs calls them a cost-efficient choice for homes on soil that shrinks and swells, because squeezing the concrete together helps it resist the ground moving. It says a standard slab doesn't perform as well on that kind of soil. We build to your approved plans, so that's where the final design gets set.
What inspections happen before a foundation is poured in Orange?
Depending on the type and extent of the work, the city requires a foundation inspection once the footings are dug and the forms are in, and anchor bolts and steel have to be set before any concrete goes in. Plumbing or electrical lines under a slab, and the slab's moisture vapor barrier, get inspected before the pour too. On a raised foundation, the city checks floor joists, girders and under-floor insulation before the subfloor goes on.
Who issues building permits in Orange, CA?
City Permit Technicians issue permits in Orange, and they also calculate fees and review smaller projects, so they're the ones to ask about fees early on. Residential plans go to the city's Plan Check staff at City Hall for review, and any vertical drilling, deep or shallow, needs a Well Permit. When your job needs a permit, we pull it, schedule the inspections, keep the approved plans on site and tell you up front what the city will want to see.
Can I build my own foundation without a contractor's license in California?
Only in narrow cases. A homeowner improving their own principal residence is exempt if they lived there for the 12 months before the work is finished, it's done before a sale, and they haven't used that exemption on more than two structures in any three-year period, which you can check with the state licensing board. The minor work exemption tops out at $1,000 and only covers work that needs no permit, done by someone who employs no one. We're fully licensed and insured.
Foundations across Orange and nearby cities
We're based in Orange and build foundations across the cities around it, including Garden Grove and Tustin. Pick your city below, or call if yours isn't listed.
Start with a quote from Cornerstone Orange Concrete
Have your plans and a sense of the slope handy, then call (714) 787-1676 or use the form.