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Foundation Repair, Waterproofing & Crawl Space Experts in San Francisco, CA

Protecting Homes in San Francisco from Cracked Foundations, Water Intrusion, and Sagging Floors

From sloped hillsides to ocean winds and shifting soils, homes in San Francisco face unique foundation and moisture challenges. At Stronghold Foundation Repair, we bring industry-leading solutions to stabilize, waterproof, and strengthen your home—no matter the condition of your crawl space or basement.

Our Services

Foundation Repair

We fix cracked foundations in San Francisco caused by settling soil, earthquakes, or time. Our helical and push pier systems provide deep, permanent stabilization—ideal for San Francisco’s variable terrain.

Crawl Space Repair & Encapsulation

Sagging floors? High humidity? Our team installs screw jacks, wood rot repair, and full crawl space encapsulation systems to protect your structure and improve energy efficiency.

Basement Waterproofing

Say goodbye to wet basements in San Francisco. We install sump pumps, vapor barriers, and drainage systems that keep your basement clean, dry, and mold-free.

Concrete Leveling

Uneven sidewalks or patios? Our San Francisco concrete leveling services use advanced polyurethane foam injection to lift and level sunken slabs with minimal disruption.

Framing & Structural Repairs

We reinforce aging framing systems, replace damaged girders, and repair joists to restore the safety of your home from the ground up.

About Stronghold Foundation Repair

Stronghold Foundation Repair was founded to solve the structural problems that other companies overlook. With years of hands-on experience and a reputation for excellence across Northern California, our San Francisco crews understand the complex soil conditions and historic architecture that make foundation repair here unique.

We believe every home deserves a strong foundation—whether it’s a Victorian in the Mission or a bungalow in the Sunset.

Our Promise: Transparent inspections, custom solutions, and permanent results backed by industry-leading warranties.

Locally operated

Engineer-verified solutions

Veteran-trusted workmanship

Hear What Your Neighbors Have to Say About Us

“After years of sagging floors in our Outer Richmond home, Stronghold installed jacks and encapsulated the crawl space—what a difference. Professional, on-time, and worth every penny.” – Martha D., San Francisco, CA

“We had a wet basement for years. Stronghold’s sump pump system has kept it dry ever since. Highly recommend their San Francisco team!” – Jason B., Noe Valley

Neighborhoods in San Francisco We Serve

We serve Northern California including Sacramento, Vacaville, Fairfield, Stockton, Davis, and the surrounding areas. Whether you’re dealing with cracks in your foundation, uneven floors, problems with doors and windows, or other structural issues, our team is here to help.

Top Cities We Serve

Hear What Your Neighbors Have To Say About Us

    
 
 
      Posted on Google  
  
 
   Jeff Tang 
 29 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Big thanks to Mike. He was amazing to work with and didn't try to oversell us on anything. He kept it real and honest about what we needed, and most importantly, what we didn't.

It's tough these days to find someone in this industry who will do that for you on the initial visit. I plan to refer everyone to Mike in the future.
  
 
     Posted on Google  
  
 
   Robert Corey 
 26 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Stronghold did a fantastic job on redoing my entire crawlspace support structure from initial quote to project completion. I was unsure how much of a job this would require to stop major settlement issues with my 1950's house. After a range of quotes, job proposals and research, Stronghold had the most reasonable scope of work at a competitive price. My choice did not disappoint, Strongholds construction workers were very professional and kept in the loop during the project. Work was performed in a timely manner with quality workmanship. I am vey happy with the work that was performed and would recommend  them for foundation related repair work. Mike, Tyler and team are top notch.
  
 
     Posted on Google  
  
 
   Sara&Dave Barnick 
 16 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. We had Adam with stronghold come out to our house for a foundation inspection. One well known foundation company came out prior and told me I needed a foundation lift on one side of my house that would cost about $30k. The second company told me my foundation was fine and needed no repair after their inspection. Our final inspection was with Adam and he assured me that our foundation was level and did not need any repairs at this time. So thankful for honest people and companies. I will call stronghold again without hesitation for any future needs.
  
 
     Posted on Google  
  
 
   Keize 
 6 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Fantastic experience with this company for my 102 year old house in midtown Sac. Im planning a big renovation and wanted to be sure my house was as level as we can get it beforehand. Prior to calling Stronghold, I had 2 other foundation companies come out. They gave me ridiculous estimates ($35-60k)- one wanted to enclose my entire basement and crawl space with plastic- totally not necessary with Sac’s climate.

Stronghold sent Michael out- he was great. He came up with a very practical plan of using girders on jacks to support a heavy (long) wall for a fraction of the price of the others (less than $6k). What a relief. Manuel obtained a permit and answered questions I had as well. The working crew came in and got the job quickly.

This is a no nonsense company and they will not sell you anything you don’t need. Highly recommend!
  
 
     Posted on Google  
  
 
   lorena juarez 
 28 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. I was skeptical that the cracks in my walls would close up, but they did. They were fair and explained the process better than every other company I had come out. I will definitely recommend to friends and family. Adam was very patient and helpful.
  
 
     Posted on Google  
  
 
   Steven Almaraz 
 23 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Very professional company. Would 100% recommend to any and all in need of their services.
  
 
     Posted on Google  
  
 
   NIK Prawdzik 
 23 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. The Stronghold team did an excellent job in explaining the process to me for my home as well as some preventative measures to ensure this doesnt happen in the future! Forever grateful for an honest professional experience!!!
  
 
     Posted on Google  
  
 
   Milton Kalish 
 18 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Adam Porter was friendly and professional,  I was very impressed when he told me that no repair was needed at this time-- he carefully explained how foundation repair works, and discussed possible strategies moving forward.
  
 
     Posted on Google  
  
 
   Jon Hurwitz 
 3 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Adam Porter came out and took a look at my situation - was super honest and guided me in the right direction. I didn't need a large foundation repair and he gave me tips on how I could get the job done myself (since it ended up being a small one). Super honest crew - you don't see that much anymore.
  
 
     Posted on Google  
  
 
   Connor Mawhinney 
 24 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. Adam came out to look at a crack in our slab after we'd received several quotes in the $7,000–$10,000 range. I was completely surprised to learn we actually had a small fix that I could do myself! The honesty blew me away, and I'd recommend Stronghold if you're looking for someone to take care of your foundation issues.
  
 
 
  
 
 
   Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

What Does Foundation Repair Cost in San Francisco?

Foundation and crawl space repair costs in San Francisco vary by home type, soil condition, and repair complexity. Pricing depends on:

The extent of foundation settlement or wall damage
The condition of your crawl space or basement
Whether you need excavation, piers, encapsulation, or waterproofing

All quotes include a free inspection and detailed scope of work. Financing options available for every budget.

The Stronghold Difference

Engineered Repairs: Every job is designed and inspected by a third-party structural engineer.
Made-in-USA Materials: Our helical piers and hardware are manufactured from U.S. steel.
Double Warranties: Backed by Stronghold and the Stronghold Foundation Repair.
Certified Crews: Local, trained, and trusted by homeowners throughout the Bay Area.

How to Get Started

Frequently Asked Questions – San Francisco

How long does foundation repair take in San Francisco homes?

Most jobs take 1–3 days depending on size and weather. We work efficiently with minimal disruption to your daily routine.

Do you service historic homes in San Francisco?

Yes! We regularly work on Victorians, Edwardians, and bungalows. Our solutions are customized for older homes and reviewed by third-party engineers.

Is waterproofing my crawl space really necessary?

Yes. In foggy, moisture-rich areas like San Francisco, waterproof crawl space systems are key to avoiding mold, rot, and air quality issues.

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