Concrete contractor in Concord, CA - driveways and patios that drain right
Cornerstone Orinda Concrete is a concrete contractor based in Orinda, pouring driveways, patios, walks, steps, walls and foundations for Concord homes, starting with the base under the slab and where the water goes.

- Licensed and fully insured.
- Free quotes on site.
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Services in Concord, CA
Concrete driveway building
Older Concord driveways often sink where the base was never packed. We dig out soft fill, compact new base and pour a slab that drains to the street.
Concrete patio construction
Backyard patios here often tip toward the house and pool water by the door. We slope the new slab away from your walls so water runs off.
Garage floor concrete
Garage floors in Concord's older houses are often pitted and cracked from decades of cars. Our garage floor concrete work replaces them on a packed, level base.
Concrete sidewalk building
Front walks here get heaved by tree roots or sink into trip edges. We cut out the broken panels, rebuild the base and pour them flush again.
Concrete retaining walls
Hillside lots at Concord's edges often need a wall to hold a bank. We build with steel inside and drainage behind so water doesn't build up against it.
Concrete steps construction
Steps at older front doors here often chip at the edges or pull away from the porch. We pour new ones on a proper footing with even rises.
Concord, CA properties and local conditions
A lot of the houses we see in Concord sit on flat lots with their original driveway, patio and garage slab, and plenty of those slabs have dropped at a corner, cracked across the middle or started pooling water by the garage door. The trouble is usually underneath, because the subgrade, the dirt and gravel the slab sits on, was raked level instead of dug out and packed, so it settled and took the concrete down with it. We dig that out and compact a new base before any forms go up. That base is the part nobody sees on pour day and the first thing a tight budget wants to trim, and I'd rather you save on a fancy finish than on the base, because a pretty top on a soft bottom cracks just the same. On the farm we learned early that a feed pad is only as good as the ground you packed under it.
The ground matters too. Plenty of yards we dig in on this side of the hills have heavy clay that swells and shrinks as its moisture changes, and on the lots that climb toward the hills, water coming off the slope has to go somewhere. We check where it runs before we set a form, and we slope the slab away from the house.
Working in Concord: permits, licenses and what moves the price
Permits for Concord homes go through the city's Permit Center, and I check with them on your job before I put a date on your pour, because a permit adds its own wait before we can dig. The city's list for single-family and duplex homes is a partial one that names work like roofs and water heaters, not driveways or patios, so don't read it as saying your slab is exempt. The Permit Center's page also lets you look up zoning, see which permits a project needs and estimate the fees, which is worth doing before you ask for bids. When your job needs a permit, we pull it as your contractor and handle the paperwork and inspection calls for our part of the work. Two licenses are worth checking on anyone you hire here, a state contractor license and a Concord business license, which the city requires even of contractors whose office is outside the city, the way ours is in Orinda. We're licensed and fully insured, and our work is backed by our satisfaction guarantee.
What moves the price here is mostly what's under and around the job: how much old concrete has to be broken out and hauled off, how much soft base has to come out, how much the slab has to be sloped or stepped to move water, how thick it needs to be for what it carries, and whether you want a plain broom finish, the light texture that gives shoes and tires some grip, or something decorative. The schedule turns on the permit if there is one, the utility marking before we dig, and curing, the days the new concrete needs to gain strength before it carries weight. Your written estimate spells out what's included, like whether hauling the old concrete away is part of it. Concord's an easy run over the hill from us, and we do the same work in Lafayette and down in Hayward.
Get a free on-site estimate for your Concord concrete job
Send the form or call, and you'll hear back within one business day, most of the time from me. I'll set a time to come out to your Concord house, walk the job with you and put a written estimate in your hands. It's free and there's no obligation to go ahead.
(925) 257-6590How a Concord concrete job goes once you call
Call and set a visit
You call or send the form, and I set a time to come out to your house. It helps if you're home for that first walk so I can hear what you want the concrete to do.
Walk the job together
I look at the ground, where the water runs and anything in the way, and ask what the slab has to carry or hold back. You get a written estimate that lists what's included, so you can hold it up line by line against any other bid.
Line up permits and marking
Once you're ready, we pull any permit your job needs and get the underground utilities marked before we dig. The wait depends on the city's review, so I'll tell you where things stand rather than guess at a date.
Prep, pour and walk it
Our crew lead and finishers dig out and pack the base, set the forms, pour and finish, and I'm usually there on pour days. When it's done, I walk the finished work with you before we pack up.
Frequently asked questions
How much does a new concrete driveway cost in Concord?
A Concord driveway's price comes down to its size, how much old concrete and soft base has to come out, and the finish you pick, and you get your own figure in writing after I walk the job. Tear-out and hauling, a thicker slab or more rebar, the steel bars that hold a slab together if it cracks, and decorative finishes all add to it, while a plain broom finish on a simple shape keeps it down. The one place I won't help you save money is the base, for the reason above.
Do I need a permit to replace a driveway or patio in Concord?
The city's permit list doesn't settle it for driveways or patios, so we check with the Permit Center on your job before we start. Separate from any building permit, the city says you apply for grading and encroachment permits with its Engineering Division when a project moves soil or works in the public right-of-way, the strip along the street. A new driveway apron or a walk that ties into the sidewalk can fall under that, so we sort it out early in planning.
When does a contractor need a state license in California?
A contractor needs a state license when the project needs a building permit, uses any additional workers, or the labor and materials on one or more contracts for the project add up to $1,000 or more. Most driveway, patio and wall jobs clear that bar, so it's worth asking any contractor for their license before you sign.
How do I check if my Concord house is in an earthquake hazard zone?
Type your address into EQ Zapp, the state's earthquake hazard map tool, and it shows whether your property lies in any of its mapped zones. It matters most for foundations and taller retaining walls, and when an engineer is part of the job, we build from their plans and stay in touch with them.
How long before I can drive on a new concrete driveway?
You can usually walk on new concrete well before you can drive on it, because the slab keeps gaining strength for days after the pour. I'll give you the walking and driving days for your slab on pour day, and it's worth parking on the street until then, since a tire on fresh concrete can leave marks or cracks that stay.
What causes cracks in a concrete driveway, and will a new one crack too?
Some fine cracking is normal in any slab, and we plan for it so it shows up where we chose instead of across the middle of your driveway. That's the job of control joints, the straight grooves we cut so the slab cracks along them as it shrinks, and we cut them on time rather than late. Most of the ugly cracks we tear out in Concord started with a soft base or water running under the slab, which is why that's where we start.
About Concord, CA
Concord is one of the bigger cities on our side of the hills, with a busy downtown, shopping along the main roads and neighborhood after neighborhood of family homes, from older ranch houses to newer subdivisions. It sits just past Walnut Creek, and we get calls from every corner of it, from a cracked garage floor in a house that's had a few owners to a new patio behind a newer place.
Older houses here usually need tear-out and a rebuilt base before anything else, newer ones usually mean adding on and matching what's there, and on the lots that climb toward the hills the job leans toward walls and steps.
Explore the services
Orinda, CA
Tell us about your Concord concrete job
Call (925) 257-6590 or use the form to describe what you want built, and we'll start sorting out which permits might apply before anyone picks up a shovel.




