(925) 257-6590

Concrete contractor in Piedmont, CA - driveways and walls built for sloped lots

Cornerstone Orinda Concrete is a concrete contractor based in Orinda. We pour driveways, steps, walks, patios and retaining walls in Piedmont, and we work out the base and drainage for hillside lots before any concrete shows up.

Wide concrete steps with dark gray caps and pale tiled treads, illuminated by warm lights along a landscaped entrance.
  • Licensed and fully insured.
  • Free quotes on site.
  • Expect a reply within 1 business day.

Services in Piedmont, CA

Concrete driveway building

Steep driveways here send water at the garage when the slope is wrong. We dig out, pack a firm base and set the slope away from the house.

Concrete retaining walls

Sloped yards here lean on old walls that bulge when water builds up behind them. We pour new walls on footings with drainage behind so the hill stays put.

Concrete steps construction

Front steps on sloped lots tip and crack as the ground under them moves. For concrete steps construction, we dig out, pack the base and set even risers.

Concrete patio construction

Terraced backyards here leave a tight, flat spot for a patio near the house. We slope it away from your walls and cut joints so the cracks land there.

Concrete sidewalk building

Front walks here get lifted by roots or sink where the base washed out. We tear out the bad sections, rebuild the base and pour walks that sit flat.

Foundation raising

Older hillside houses can settle at one corner, and it shows up as sticking doors and cracked slabs. We find the cause first, then raise and support what dropped.

Piedmont, CA properties and local conditions

Most Piedmont jobs we see start with a slope. Water runs down a driveway or walk on a hill and gets underneath it, and if the subgrade, the dirt and gravel the slab sits on, was only raked level instead of dug out and packed, it washes out and settles until the concrete cracks and drops. My dad used to say the part of a fence post you can't see is the part doing the work, and concrete's no different. So we dig to firm ground, pack the base, set the slope so water heads away from your house and cut control joints, shallow grooves that give the slab a straight place to crack when it shrinks a little.

A lot of the concrete around older Piedmont houses has been patched more than once. We find steps pulled away from the porch, driveways with a seam where two pours never matched, and old walls with nothing behind them to let water out. We usually cut out the failed sections rather than pour a thin skin over them that'll lift again before long.

What a concrete job in Piedmont involves before we pour

Piedmont's city government issues building permits for most construction projects and repairs, so on any concrete job here I assume the city is part of it, and I check with its planning and building department on your job before we dig. Most changes you can see above ground need design review first, and a large or complicated project can need approvals from the Planning Commission and City Council before it gets a permit. In Piedmont that paperwork usually sets the start date more than our crew's calendar does. We're licensed and fully insured, and you can look up any contractor's state licence with the Contractors State License Board before you sign.

The price here turns on the slope, how much old concrete comes out and gets hauled off, how deep we dig for a solid base and the finish you choose, and your written estimate spells out which of those it includes. The schedule also depends on getting a concrete truck up tight hillside streets and narrow driveways, so I work out how we'll reach the forms while I'm walking your lot. We pour in flatter places like Alameda too, and the base and drainage work is the same idea there, just with less hill fighting you.

Get a free on-site concrete estimate in Piedmont

Send the form and we'll reply within one business day, and most of the time it's me calling you back. I'll set a time to come walk your Piedmont job, and the written estimate is free with no obligation.

(925) 257-6590

What happens after you call us about a Piedmont concrete job

  1. Call us and set a visit

    You call or send the form, and I come out myself to walk the job, listen to what you want and look at the ground, the water and anything in the way. If you can be home, you can show me where the water goes when it rains.

  2. Get your estimate and permits

    You get a written estimate that says what's included, like whether hauling the old concrete away is part of it. Once you're ready we line up permits and utility marking, and since a Piedmont permit that needs plans and review can take several weeks or months, we get it moving early.

  3. Prep the base and pour

    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. The city allows construction Monday through Saturday from 8 a.m. to 6 p.m. and Sunday from 9 a.m. to 6 p.m., and we keep our work inside those hours.

  4. Walk the finished job together

    Before we pack up, I walk the finished work with you and explain curing, the stretch the concrete needs to harden before it takes foot traffic and then a car. The work is backed by our satisfaction guarantee.

Frequently asked questions

Do I need a permit to pour a concrete patio or driveway in Piedmont?

Plan on needing one, because Piedmont's list of work that skips a permit covers things like painting, carpeting and most tiling, not concrete. Hardscape, patios, outside stairs, retaining walls and site drainage fall under the city's site improvement permit, and even exempt work still has to meet the building codes and may need an inspection. I check with the city on your job before we start rather than guess.

Who can pull a building permit for concrete work in Piedmont?

Only a properly licensed California contractor, or a property owner acting legally as an owner-builder, can get a building permit, according to the city's permit guide. When your job needs one, we pull it as your contractor and handle the paperwork and inspection calls for our part. Applications go in online, since the city no longer takes paper or email.

How do I know if my retaining wall needs a permit in Piedmont?

A wall 30 inches tall or less, measured from the top of the grade to the top of the wall, is on Piedmont's list of work that needs no building permit, unless it holds up a surcharge, which is extra weight like a driveway or a slope above it. If your project needs design review or zoning approval, it needs a building permit anyway. Taller walls aren't on that list, so we plan them as permit work and build from the engineer's plans when there is one.

Do I need a Public Works permit for concrete work near the street in Piedmont?

You do if any of the work is in the public right of way, or if it sends more stormwater to the street, because Piedmont requires an encroachment permit from Public Works for that even when no building permit is needed. That matters most for a driveway or walk that meets the street, so I look at where your water ends up before we price the job.

How much does a new concrete driveway cost in Piedmont?

You get your number in writing after I walk the lot, because on a slope the tear-out, the hauling and how deep we dig for a solid base move the price more than the size does. When a budget gets tight, the base is usually the first thing people want to cut, since nobody sees it on day one, and I'll push back on that. A plain broom finish, the light texture that gives tires and shoes some grip, on a well-packed base will outlast a fancy finish on dirt that settles.

What causes a new concrete driveway to crack on a Piedmont slope?

Most cracks come from a base that was raked flat instead of dug out and packed, water running under the slab, a pour in midday heat that leaves a weak, dusty top, or joints cut late or skipped. Concrete still cracks a little as it dries, so we pack the base, add rebar, the steel that holds the pieces together if a crack opens, pour early in the day and cut the control joints on time so the cracks show up where we planned them.

About Piedmont, CA

Piedmont is a small city that's almost all homes, with Oakland on every side, and it's a short drive over the hill from our base in Orinda.

Many of the houses here are older and built into the hill, with garages down at the street, long runs of steps up to the front door and terraced yards held up by walls. So a job here is usually as much about holding the ground and moving water as it is about a smooth, flat slab, and that's what I look at first when I walk your lot.

Orinda, CA

Talk through your Piedmont concrete job

If old concrete is lifting or water is heading toward your house, a look now can keep a small repair from turning into a bigger tear-out.

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