Foundation installation in Napa, CA - a base built for your soil and the walls above
Building a new house or a big addition? We plan the ground, the pour and the wall tie-in so your house starts on solid footing.
- Licensed and insured.
- Free quotes on site.
- We reply within 1 business day.
What does it take to put in a new foundation in Napa?
Foundation installation in Napa means forming, pouring and finishing the concrete base your house or addition stands on, so the framing above sits on something solid and level. Most of the time on a new foundation goes into planning before the pour, because the soil and the design decide what we build.
If you're building a new home, adding a room or putting living space over a garage, the foundation is the first thing built and the hardest thing to change later. The price moves with the size and shape of the footprint, how much digging the lot needs, how much steel the design calls for and whether the ground slopes. The schedule turns less on the pour itself than on the soil reports, any engineer's drawings and the city's sign-offs that come before it. When I come out, the estimate I give you says what's included and what isn't, so you can see where your money goes.
How do you know your project needs a new foundation?
Plans for an addition
If you have drawings or even a sketch for a new room, that part of the house will need its own foundation tied into the one you have. Calling before the framer is booked matters, because the soil and design work come first and can't be rushed at the end.
A lot that slopes away
When the ground falls off toward the street or the back fence, the foundation usually has to step down the hill, which means more digging and more forming. Finding that out after you've set a budget is the expensive way to learn it.
Sloping floors in an older house
Floors that tilt, doors that stick or cracks that keep coming back can mean the base under your house has moved. A remodel built on top of that usually cracks too, so it's worth having the foundation looked at before you put money into the rooms above it.
How we handle foundation installation
I start before any digging, by helping you get the soil reports and any engineer's design started, because those decide how deep we dig and how much steel goes in. Then we lay out the footprint, dig it and pack the subgrade, the ground the concrete sits on, so it won't settle under the weight of the house later. We set the forms, tie in rebar, the steel that holds concrete together when the ground pushes or pulls on it, and set the anchor bolts where the walls above will tie down. I plan that tie-in and the bracing of those walls now, since the hardware gets cast into the pour and can't be moved afterward. After the pour we finish the top flat for the framing and let it cure, a wait while the concrete gains strength before it takes any weight. The dig and the steel are the parts you'll never see once the house is up, and they're the parts I won't cut to save money, because concrete is hard to undo.
Not every job needs a full foundation. A deck, a porch or a garden wall often sits on concrete footings alone, poured pads or strips set deep enough to carry the load. For small property owners putting up a new building, we also do concrete parking lot building, and planning the lot together with the foundation keeps the site work in one sequence.
New house on an open lot
This suits owners building from the ground up, where we plan everything from the soil to the wall tie-in in one sequence. It's the simplest kind of foundation job to schedule, because there's no existing house to match.
Addition tied to your house
This suits owners adding a room or living space beside the house, where the new foundation has to meet the old one at the right height. I look at the existing foundation first, because how we connect to it shapes the whole plan.
Get a free on-site estimate for your new foundation
Send the form and we'll reply within one business day to set a visit. I come out, look at your lot and give you a free estimate that says what's included and what isn't, with no obligation.
Call (707) 254-6028What happens when you call about a foundation in Napa
Here's how a foundation job runs from your side, from the first call to the day I walk the finished work with you.
Call or send a request
Call (707) 254-6028 or send the form, and we'll get back to you to set a time for me to come out to the lot. If you already have drawings or a soil report, keep them handy for the visit.
I walk the lot with you
I look at the slope, the access for concrete trucks and, on an addition, the house you're tying into, and I ask what you're planning. Your estimate lays out what's included and what isn't, and flags whether soil reports or an engineer are likely part of the job.
We line up permits and inspections
Once you say yes, we line up the permits and inspections and tell you who books each one. Plans that go through the city's full review come back within 21 business days, and the counter takes submittals in person 8 AM to 4 PM, Monday through Thursday, so we build that time into the schedule.
We pour, then walk it together
Our crew forms, pours and finishes the foundation, and I'm on the job with them. When it's done, I walk the finished work with you and explain what was built, so you know how to care for it and could explain it to a neighbor.
Why Napa homeowners call First Choice Napa Concrete for foundations
Your satisfaction, guaranteed. When you're ready, tell us about your project and I'll come out and walk the lot with you.
I do every estimate myself
I come out to look at the job and write the estimate, and I'm on site with our crew when they form and pour. The person who planned your foundation is the one watching it go in.
In business since 2013
I came to concrete in my late thirties, learned it on a crew pouring driveways, patios and foundations, and started this business in 2013. That's 13 years of explaining each step before we take it, so you know what you're paying for.
A licensed, insured crew
We're licensed and insured. California's Contractors State License Board sets the license classes for contractors, including one for concrete work, so it's fair to ask anyone pouring your foundation which license they hold.
Foundations, footings and permits in Napa
The City of Napa Building Division takes permit submittals, and its list of work that can skip a permit names low retaining walls, not foundations. That list doesn't settle every job, so on yours I talk with the division early and plan the pour around any sign-off it needs. The city also expects all work, even work that's exempt, to follow its codes, so we build to them either way.
Around Napa we see sloped lots that need a stepped dig, flat lots where the big question is the soil, and plenty of older houses getting additions where the new foundation has to meet the old one. We see much the same on jobs in Sonoma and American Canyon, and in many of the other cities around Napa.
Questions about foundation installation in Napa
How much does a new foundation cost in Napa?
Foundation installation in nearby San Francisco usually costs about $10,000 to $35,000 per project, and that's the going rate there, not our price for Napa. Where your job lands depends on the footprint, the slope, and what the soil reports and any engineer call for. The estimate I give you after seeing the lot shows where your number comes from.
Do I need soil reports to build a new house in Napa?
Yes, for new buildings and additions over 300 square feet, the City of Napa asks for two geotechnical soil reports, studies of what the ground under the building is like, or an approved waiver. Because the design depends on them, we help you get the reports or the waiver request started before anything else.
How do I check if my Napa lot is in an earthquake hazard zone?
Look up your address on the state's EQ Zapp map, which shows whether a property lies in a mapped zone for fault rupture, liquefaction or earthquake-induced landslides. Liquefaction is when loose, wet ground loses its strength in shaking. In those zones, geologic and engineering studies can find and reduce the ground hazard before construction starts, so tell me what the map shows when we talk.
How do I keep my house from sliding off its foundation in an earthquake?
Anchor and brace the cripple walls, the short wood walls that sit on the foundation and carry the floor. In an earthquake, poorly anchored cripple walls may let a house slide off its foundation, and poorly braced ones may collapse. That's why I plan the anchor bolts and the bracing before we pour, since the bolts get set into the wet concrete.
When do I need a structural engineer for a new foundation?
One maker's guide, an older one written for raised foundations, says owners of older hillside houses, or houses with living space over the garage, need a licensed structural engineer to design the solution. The same guide says cripple walls taller than 48 inches need a qualified design professional to evaluate them. If either fits your house, plan the engineer's time and fee into your schedule and budget, and I'll check with the city early on what your job needs.
How long does foundation installation take in Napa?
Most of the wait comes before the pour, because the soil reports, any engineer's design and the city's plan review all have to be done first. Once the crew is on site, the dig, forms and steel go in, and then the concrete cures before any framing goes on top. I'll walk you through the order for your job at the estimate, since your lot and your plans set the pace.
Other concrete work around a new foundation
- Concrete footings
Adding a carport, a shed or a post that carries a roof? Footings poured to the right depth give it solid support without a full foundation.
- Concrete parking lot building
Building on a property with tenants or customers? A concrete lot planned alongside the site work can be graded for drainage and saves digging up fresh ground twice.
Service areas for foundation work around Napa
First Choice Napa Concrete is based in Napa, California, and we pour foundations in many of the cities around it. The 12 cities below, including Fairfield and Vallejo, have their own pages, and they're some of the places we work, not all of them.
Napa, CA
Start planning your new foundation
Call (707) 254-6028 or send the form with your address, whether it's a new house or an addition, and whether the lot slopes, so I come out ready.