(925) 257-6590

Concrete contractor in Walnut Creek - slabs built for sloped lots and big trees

Cornerstone Orinda Concrete is a concrete contractor based in Orinda, pouring driveways, patios, walks, steps and retaining walls for homeowners in Walnut Creek, with the base and drainage set right before any concrete arrives.

A broad stamped concrete patio has gray slab sections and dark, textured curved bands around a large tree.
  • Licensed and fully insured.
  • Free quotes on site.
  • Expect a reply within 1 business day.

Services in Walnut Creek, CA

Concrete driveway building

Many Walnut Creek driveways settle where the base was never packed. We tear out the slab, rebuild what's underneath and pour one that drains away from the garage.

Concrete patio construction

Plenty of older patios here tip toward the house and send rainwater at the foundation. We set the slope before we pour so water heads to the yard.

Stamped concrete services

Backyards here get used as outdoor rooms, so folks want more than plain gray. Our stamped concrete adds a stone or tile look over the same packed base.

Concrete retaining walls

Hillside lots here often need a wall to hold up a flat yard or driveway. We build them with drainage behind so water can't push them out.

Concrete steps construction

Front steps on sloped lots shift and crack when the ground under them settles. We dig to firm ground, add steel and pour every step the same height.

Garage floor concrete

Older garage floors here are often cracked, stained or sloped the wrong way. We break out the old floor and pour one that sheds water toward the door.

Walnut Creek, CA properties and local conditions

Big trees are behind more of our Walnut Creek calls than people expect, because roots keep lifting driveways and front walks until the slab cracks or somebody trips on it. Taking the tree out usually isn't the easy fix, since the city protects any tree, dead or alive, that measures 9 inches or more at 54 inches off the ground, and removing one takes a Tree Removal Permit that the City Arborist may or may not approve. Most of the time the better plan is to work with the tree, so I look at where the roots run and we shape the slab, the edge or the path of a walk around them instead of pouring right back over the problem.

The other thing I check on every lot here is where the water goes. A lot of yards slope toward the house or the street, and a slab poured flat or tipped the wrong way either pushes runoff at your foundation or leaves a puddle that sits for days, so we set the fall of the slab, the gentle tilt that moves water off it, before anything gets formed.

Working in Walnut Creek: permits, access and what sets your price

Inside the city limits, permits come from Walnut Creek's Community Development Department, and the city asks for a building permit whenever you add a structure to your property or physically change it. The city's own examples lean toward remodels, roofs and windows rather than concrete, so I check with the department on your job before we start instead of guessing, and when a permit is needed we pull it as your contractor and handle the paperwork and inspection calls for our part. A permit adds a step before we dig, so I build it into the schedule along with utility marking, and we're licensed and fully insured. Your price mostly comes down to the size of the slab, how much old concrete comes out and gets hauled off, how much work the ground underneath needs and the finish you pick, and the written estimate I give you after walking the job spells out what's included.

Walnut Creek is an easy drive down Highway 24 from Orinda, where I started this business in 2020 after years on East Bay concrete crews. Access is the part that changes most from street to street here, because on the steep, narrow streets that climb toward Shell Ridge a concrete truck often can't back up close, and then we pump or wheel the concrete in, which takes more time and money than pouring straight off the truck. It's the same crew and the same way of working you'd get from us over the hill in Berkeley.

Get a free on-site concrete estimate for your Walnut Creek home

Send the form and you can expect a reply within one business day, and most of the time it's me calling you back to set a time to walk the job in Walnut Creek. The estimate is free, done on site and obligation-free, and you get it in writing with what's included, like whether hauling the old concrete away is part of it.

(925) 257-6590

How a concrete job runs with us in Walnut Creek

  1. Call us or send the form

    Tell us what you've got in mind, and we'll find a time for me to come out. You don't need measurements or a plan yet, just the problem you're looking at.

  2. Walk the job together

    I look at the ground, where the water runs and anything in the way, like roots or a tight driveway, and ask what the concrete has to carry or hold back. You get a written estimate that says what's included, so you're not guessing at the price.

  3. Permits, marking, then the pour

    Once you're ready, we line up any permits and utility marking, then our crew lead and finishers prep the base, form, pour and finish, and I'm usually there on pour days. We plan the work around the city's calendar, since Saturdays and city holidays need an after-hours permit and no construction is allowed on national holidays like Thanksgiving or Christmas.

  4. Walk the finished work

    Before we pack up, I walk the finished concrete with you and go over how to treat it while it cures. We leave the site clean, and the work is backed by our satisfaction guarantee.

Frequently asked questions

Do I need a permit to replace the driveway approach or sidewalk in front of my Walnut Creek house?

Yes, the city requires an Encroachment Permit to replace the driveway approach, the piece where your driveway meets the street, or the sidewalk in front of your property. If your job includes either one, I'll flag it on the estimate visit so it's part of the plan and the schedule from the start.

How do I apply for a building permit in Walnut Creek?

You apply through the city's Online Permit Portal, which you'll find on its building permits page, because Walnut Creek no longer takes paper or emailed applications. The permit has to be signed by the legal property owner or a California licensed contractor, so when we're your contractor on a job that needs one, we can take care of that step.

Does a concrete retaining wall need a permit in Walnut Creek?

A retaining wall needs a building permit unless it's 4 feet tall or less, measured from the bottom of the footing, holds back 3 feet of soil or less and carries no extra load above it, which the city calls a surcharge. On a sloped lot that line comes up faster than people think, so I measure it on the estimate visit and check with the city before we build.

How much does a new concrete driveway cost in Walnut Creek?

Your price comes from a free on-site estimate, because what a Walnut Creek driveway costs turns mostly on what's under it and how we get to it, not just its size. Rebuilding a soft subgrade, the packed ground the slab sits on, fixing drainage, pumping concrete up a steep drive, adding a stamped finish or replacing the approach at the street all add to it. If you need to trim the budget, the base is the last place I'd cut, because nobody sees it on pour day but it decides whether the slab stays put.

What causes concrete driveways to sink and crack?

Most sinking starts with a base that was raked level instead of dug out and packed, so the slab drops as the loose dirt under it settles, and water running underneath makes it worse. Cracks come from concrete shrinking as it dries, and they land in random spots when control joints, the grooves we cut on purpose so the slab cracks along a straight line, go in late or get skipped. All concrete cracks a little, so we plan where it happens instead of hoping it won't.

How long will I be without my driveway during a concrete replacement?

You're without it from tear-out until the new slab has cured enough to take a car's weight, which is a good while longer than the wait to walk on it, and I'll go over the dates for your job before we start. Curing is the slow hardening that gives concrete its strength, and parking on it early is how a good new slab ends up with broken edges.

About Walnut Creek, CA

Walnut Creek has a busy downtown, but most of our work here is at the houses spread out from it, from flat streets near the center to lots that climb toward the ridges and open space. A lot of these homes have the long driveways, side walks and backyard patios that wear out together, so one call about a cracked driveway often turns into a look at the walk and the steps too. The houses don't change much at the city line, which is why we do the same kind of work next door in Lafayette and over in Concord.

That spread is also why two Walnut Creek jobs rarely look alike. A flat lot with an easy driveway is mostly about the base and the finish, while a sloped lot near the hills brings walls, steps and drainage into the job before we pour anything.

Orinda, CA

Tell us about your Walnut Creek project

Call (925) 257-6590 or send the form with what you're planning, and we can sort out any permit questions before the job goes on the calendar instead of after.

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