Foundation repair in Castro Valley CA - a fix that fits how your house is built
Cracks in the foundation, sticking doors or sloping floors? We find out why it moved, then repair it in a way your house can take.

- Fully licensed and insured.
- Free estimates at your property.
- We reply within 1 business day.
What does foundation repair involve, and what sets the price?
Foundation repair in Castro Valley means fixing the cracked, crumbling or settled parts of the foundation your house sits on, and sometimes bringing a house that settled unevenly back toward level, so the walls, floors and doors above it stop taking the strain.
Most people call us after spotting a crack that wasn't there last year or a door that suddenly sticks, and they want to know how worried to be. The price mostly comes down to what your house is built of, how much of the foundation is damaged and why, how easy it is for us to get at it, and whether the job needs a permit and inspections. The schedule turns on that same permit question and on what we find once the work is open, and the written estimate I send after looking spells out the work and materials so you can see where the money goes.
How do you know your foundation needs work?
Stair-step cracks in brick
A crack that zigzags along the mortar joints of a brick foundation or wall usually means part of the house has moved more than the rest. Left alone, water works into that crack every rainy season and the damage spreads to bricks that were fine.
Doors that suddenly stick
When a door that closed fine last year now rubs at the top, or a window jams, the frame has usually gone out of square because the house shifted. Planing the door hides it for a while, but the movement underneath can keep going until someone finds the cause.
Crumbling at the foundation
Cracks in the concrete showing between the ground and the siding, or block and brick that flakes when you rub it, mean the foundation itself is wearing out. The longer it goes, the more of it needs rebuilding instead of patching.
How we handle foundation repair
The first thing I want to know is what your house is built of, because a wood-frame house on a concrete foundation and a brick house don't take the same repairs. Then we look at the foundation itself, from the crawl space wherever we can get in, to see what cracked, what's crumbling and why, because a patch over a cause that's still at work just cracks again. We go over the options with you in plain words before any work is planned, and once you've picked one, we cut out the bad sections, rebuild or patch with mortar and concrete that suit what's already there, and clean up so the crawl space and yard look the way we found them.
Foundation trouble rarely stops at the foundation. If the house has moved, the chimney often shows it first with cracks or a lean, so chimney repair can be planned on the same visit. On older brick foundations the mortar between the bricks wears out on its own, and tuckpointing clears out those worn joints and packs in fresh mortar, so it's often part of the fix.
Brick and stone foundations
These suit older houses where the trouble is usually crumbling mortar, loose units or cracked sections. The repair is careful rebuilding with a mortar soft enough to work with old brick instead of fighting it.
Concrete and block foundations
Newer houses usually sit on poured concrete or concrete block, and here we're mostly fixing cracks, faces that have spalled, which is when the surface flakes away, or a section that has to be cut out and replaced.
Get a written estimate for your foundation repair
We reply within one business day to set a time. I come out, look at the foundation with you, then send a written estimate. It's free, and there's no obligation to go ahead.
(510) 264-7156- hello@castrovalleyconcreteandmasonry.com
- Based in
- Castro Valley, CA 94546
- Hours
- Mon–Fri: 7 AM–10 PM, Sat–Sun: 8 AM–9 PM
What happens after you call about your foundation?
Here's how a foundation job runs with us, from your first call to the walk-through at the end, so you know who you'll see at each step.
Call or send a message
Tell us what you're seeing, and I'll set a time to come out and look at it with you. Photos of the cracks help if you've got them.
Look at the foundation together
I'll talk through what I see and what your choices are, then follow up with a written estimate that lists the work and the materials. That way you can read it line by line before you decide anything.
Do the work, then walk it
Once you say go, we sort out any permit the job needs and put it on the calendar, and my crew does the work with me checking in. At the end we walk the finished job together so you can see what was fixed and why.
Why Castro Valley homeowners call C&M for foundation repair
The owner looks at it
I come out to look at the job myself, and I stay involved while my crew does the work. You hear the diagnosis from the person who answers for the repair.
Masonry repair here since 2013
I started this business in Castro Valley in 2013, and repair on older brick, mortar and chimneys has been our main work for those 13 years. That's a lot of what sits under and around a foundation.
Licensed and insured in California
We're fully licensed and insured. In California the Contractors State License Board licenses and regulates contractors, and that matters on work that holds up your whole house.
On a foundation, getting the cause right matters more than anything we pour or patch. Get in touch and I'll come take a look.
Foundation and masonry work in Castro Valley
Alameda County issues building permits in Castro Valley, and digging or moving earth around a foundation can bring in a separate county grading permit. Whether your repair needs either one depends on the work, so we check with the county for your address and take care of the paperwork and inspections when it does. The state also maps liquefaction and landslide zones, and the county has to use those maps when it permits building, because homes in those zones need a study of the foundation soil or the slope as part of their design. That's why I like to know early whether your address falls in one, since it can change what the county asks for before work starts.
Around here we see a lot of older wood-frame houses on raised foundations with a crawl space underneath, along with brick chimneys and brick foundations that have been patched a few times over the years. We run into the same kinds of houses on jobs in Hayward and San Leandro, and we handle them the same way, starting with what the house is built of.
Questions about foundation repair in Castro Valley
Can my house be jacked back up to level?
It depends on what it's built of. One extension guide, written for houses outside California, says jacking can often correct uneven settling in a wood-frame house, but that masonry shouldn't be jacked or leveled. If your house is brick or block, plan on a different kind of repair, and we'll walk you through what that looks like.
How do I make my house safer in an earthquake while the foundation is being fixed?
Look at the cripple walls, the short wood walls between the foundation and the first floor. In an earthquake, poorly anchored cripple walls can let a house slide off its foundation and poorly braced ones can collapse, and retrofitting those weak spots lowers the risk of damage. It makes sense to plan that alongside the foundation work, and the county's permit resources include a guide called Earthquake Strengthening for Residential Homes that's worth reading before you apply.
How much does foundation repair cost in Castro Valley?
There's no fair number until someone looks, because two cracked foundations can need very different work. Your written estimate lists the work and materials line by line, so you know what you're paying for before you decide.
How much can a contractor ask for up front in California?
No more than $1,000 or 10 percent of the total contract price, whichever is less, under the Contractors State License Board's rule for home improvement work. Any other payments have to be listed in the contract and match work completed or materials delivered, so you pay as the job moves forward.
Who issues permits for foundation work in Castro Valley, and where do I apply?
Alameda County does, and applications go through the county's permit portal, where you or your contractor submit plans, schedule inspections and check on status. You can also ask the county building department to see your property's permit history, which holds every permit it has issued there. When your job needs a permit, we handle that side for you.
How do I find out if my house is in an earthquake hazard zone?
Look up your address on the state's EQ Zapp map, which shows whether a property sits in a mapped zone for fault rupture, earthquake-triggered landslides or liquefaction, when soil briefly turns to something like quicksand. It's worth checking before we start, because those zones can change what the county asks for.
Other masonry work that often comes with foundation repair
Chimney repair
A brick chimney rests on its own footing, so if the house has shifted, it's worth checking for loose bricks, leaning or cracked mortar near the roofline.
Tuckpointing
When mortar joints in a brick foundation or wall have gone soft and sandy, fresh mortar keeps water out and holds the bricks tight again.
Cities we serve around Castro Valley
C&M Castro Valley Concrete & Masonry is based in Castro Valley, California, and we do foundation work across the 12 cities listed here, including Oakland and Pleasanton. We work in the cities around them too, so if you don't see yours, just ask.
Castro Valley, CA
Book a look at your foundation
Have your address, whether the house is wood frame or brick, and any old permits from the county's files handy when you call, so the first visit gets straight to the cause.
