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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  
  
 
   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.
  
 
     Posted on Google  
  
 
   Heather Johnson 
 17 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. I had an outstanding experience with Stronghold Foundation Repair from start to finish. Their team was professional, knowledgeable, and incredibly honest throughout the entire process. They took the time to thoroughly inspect my properties, explain the cause of the foundation issues in terms I could understand, and presented solutions without any pressure or unnecessary upselling. Communication was excellent, the crew arrived on time, kept the work area clean, and completed the project with exceptional attention to detail. It’s clear they take pride in the quality of their work and genuinely care about their customers. I now have complete confidence in the stability of my home’s foundation and the value of the repairs they performed. Finding a contractor you can truly trust isn’t easy, but Stronghold exceeded my expectations in every way. If you’re looking for a foundation company that is honest, reliable, highly skilled, and committed to doing the job right, I highly recommend Stronghold Foundation Repair. They have earned my trust, and I wouldn’t hesitate to use them again or recommend them to family, clients, and friends.
  
 
     Posted on Google  
  
 
   Crystal V 
 10 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. Adam came out and explained the issue wasn’t my foundation but my driveway. He was honest and said I could get someone else to do it cheaper and gave me a referral. I appreciated his honesty. I’d work with him again.
  
 
     Posted on Google  
  
 
   Grace Lattuada 
 6 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent customer service, fair pricing, honest owners, and premium quality of work.
  
 
     Posted on Google  
  
 
   InTheZone Outdoors 
 2 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great customer service, a the crew doing the repairs where great an helpful with all the questions I had once’s again thank you !
  
 
 
  
 
 
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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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