Foundation installation in Orinda CA - a solid base that fits your lot and slope
Building on a sloped or tricky Orinda lot? We build to your engineer's design so the house sits on ground that holds it.
- Licensed and fully insured.
- Free quotes on site.
- Expect a reply within 1 business day.
What goes into a new foundation on an Orinda lot?
Foundation installation in Orinda means building the concrete base under your house or addition, whether that's a slab, a stem wall or piers tied together by a grade beam, so the building's weight gets carried down to ground strong enough to hold it.
Most folks call us with an addition or a new house on the drawings, or a lot they're still sizing up, and they want to know what happens under the floor before anybody spends real money. The price moves with what the engineer calls for, how steep the lot is, how much dirt has to be dug out and hauled off, how deep the concrete goes and how easy it is to get trucks and equipment to the spot. The schedule mostly turns on paperwork, because the soils study, the engineer's design and the permits all have to land before we dig, so those are the things to start on early. Once I've walked your lot, you get a written estimate that spells out what's included, like whether hauling the dirt away is part of it.
When is it time to bring in a foundation contractor?
An addition on the drawings
If your architect has an addition or a new house drawn up, the foundation is the first thing built and the one thing you can't easily redo later. Bringing us in after framing is already booked usually means the whole job sits and waits on the concrete.
A lot that drops away
When the yard falls off toward the street or down the hill, the foundation has a lot more to handle than it would on flat ground. Finding that out after the plans are drawn can mean a redesign and another round of review.
Water that sits where you'll build
Puddles that hang around after a rain, or ground that stays soft, usually mean water has nowhere to go in that spot. A foundation poured without a plan for that water can end up sitting in it for years.
How we handle foundation installation
The site picks the foundation, not us, so we build to your engineer's design and I'll help you get the soils report and plans lined up early, because starting on guesswork is like planting before you've walked the field. Once the permits are in hand, our crew digs out to the depth on the plans, drills any pier holes down into firm ground, and gets the subgrade, the ground the concrete sits on, firm and packed before the forms go up. Then we set the rebar, the steel bars that hold the concrete together when the ground shifts or the house pushes down, pour, and let it cure, which is the slow wait while concrete gains its strength before anything gets built on top. If I have to choose between spending on what's under the concrete and how it looks on pour day, I pick what's under it, since nobody ever sees a foundation's base but everybody lives on top of it.
A foundation usually brings other concrete work with it. Some plans call for separate concrete footings under porches, decks or posts, and we pour those at the same time so they sit on the same prepared ground. If the new building is a small office or a multi-unit place that needs paved parking, we handle concrete parking lot building too, laid out so cars and delivery trucks can get in and out.
Slab on grade
Suits a house or addition on flat, firm ground, where the floor and the foundation are poured as one piece of concrete. It's the simplest of the three when the soils report and the engineer say the ground can take it.
Stem wall
Suits homes that want a raised floor with a crawlspace underneath, built as a footing with short concrete walls on top. It leaves room for plumbing and wiring below the floor and is common where the ground is fairly level.
Pier and grade beam
Suits lots where the engineer wants the weight carried deeper, with concrete piers drilled down and a steel-reinforced beam tying them together at the top. It's the one you'll hear about most on sloped lots and soft ground.
Get a written estimate for your foundation
Send us your address and what you're planning, and we'll reply within one business day, most of the time with me calling you back. I'll set a time to walk your lot, and the estimate is free, done on site and comes with no obligation.
(925) 257-6590Foundation installation on Orinda's slopes
Plenty of Orinda homes sit on hillsides, and that changes the job before we ever dig, because the city requires a Hillside Grading Permit for any amount of grading on a developed lot whose average slope is over 15%. The city makes an exception for grading that stays outside the required yard setback, within 30 feet of the house's footprint, and changes the ground level by no more than 12 feet at the house, and the County has its own grading permit once the digging or fill gets big enough. On a sloped lot that permit question can steer the foundation choice itself, so I start every hillside job by finding out which permits your lot needs.
The state also maps Seismic Hazard Zones, places where weak soil or rock is likely underneath and can fail in an earthquake, and on a lot inside one the grading and construction need the right precautions so that ground doesn't damage the house. We're based in Orinda and work in cities on both sides of the hills, and we see the same steep driveways and sloped lots on jobs in Lafayette and Moraga.
What happens when you call about a foundation in Orinda?
Call and set a site visit
You call or send the form, and I come out myself to walk the lot with you. I listen to what you're building and look at the ground, where the water goes and anything in the way, like trees or a tight driveway.
Get your written estimate
You get a written estimate that says what's included, like whether hauling the dug-out dirt away is part of it, so there's no guessing about what the number covers. If you've got a soils report or plans, I price from them.
Line up permits and marking
Once you're ready, we line up the permits and get the utility lines marked before anyone digs. The County processes a building permit only after every other agency that reviews the project has approved it, so those reviews are worth starting early.
Dig, form, pour and finish
Our crew lead and finishers prep the base, set the forms and steel, and pour, keeping to the County-approved work hours and truck routes when the job has a grading permit. I walk the finished work with you before we pack up.
Frequently asked questions
What is the best way to choose a foundation for a hillside lot in Orinda?
Let the soils report and the engineer decide, because the slope and the ground set the foundation type. One contractor notes that a slab or stem wall on a hillside takes a lot of cutting, filling and retaining to make a level pad, while pier and grade beam works with the slope and typically means less grading and less dirt hauled away. On flat, stable ground with well-packed soil, that same contractor says a slab or stem wall works fine, and we build whichever one your engineer designs.
Who issues building permits in Orinda?
The Contra Costa County Building Department issues building permits for Orinda, and you need one to build, enlarge, alter or repair any building or structure. When your foundation job needs a permit, we can pull it as your contractor and handle the paperwork and inspection calls for our part of the work.
Does digging for a foundation in Orinda need a grading permit?
It does once the digging passes the County's limits, which are going deeper than 5 feet or moving more than 50 cubic yards. Fill that supports any structure, runs deeper than 3 feet or tops 50 cubic yards needs one too, and other conditions can trigger it, so check the County's grading permit page for the current figures. On steeper lots, the city's hillside permit covered above can apply as well.
How do I find out how deep my foundation piers need to go?
A geotechnical report, which is a study of your lot's soil, and a structural engineer's design set how big the piers are, how far apart they sit and how deep they go. If you're going with piers, plan on both being part of the job. We drill and pour to the depth on the engineer's plans.
How much does foundation installation cost in Orinda?
There's no one number, because the cost comes from your lot and your engineer's design more than from the concrete itself. Steep ground, deep piers, lots of dirt to dig out and haul off, and a tight spot for trucks all push it up, while a flat, firm lot that takes a simple slab keeps it down. Your written estimate spells out what's included so you know exactly what the price covers.
Do I need a licensed contractor to pour a foundation in California?
Yes, unless the whole contract, labor and materials together, comes to less than $500, and that small-job exemption doesn't cover minor work that's part of a bigger project. A foundation is well past that line, so hire someone with a California contractor license.
Orinda, CA
Book a walk of your building lot
Have your property address and any soils report or plans handy when you call (925) 257-6590 or fill out the form, so I can see what the engineer has in mind before I come out.