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The 10 Best Foundation Repair Companies in San Francisco (2026)
This list ranks the top foundation repair providers around San Francisco using Google review data and an updated 2026 calculation. We sort businesses by a Bayesian-style score that balances average rating with the number of reviews, so firms with many high ratings rise above small-sample outliers. In a city of older wood-frame homes, steep lots and seismic concerns, foundation and concrete work are often a practical consideration for homeowners and property managers. Use this guide as a starting point to compare local contractors by reputation, then follow up with inspections, written estimates and permit checks for your specific project.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Golden Bay Foundation Builders
Golden Bay Foundation Builders tops the list with a perfect 5.0 Google rating backed by 63 reviews, and is categorized as a concrete contractor. That combination of an ideal average and a relatively large review count gives it the strongest Bayesian score in our ranking. Because our method weights both rating and review volume, Golden Bay’s sustained high marks put it ahead of firms with similar averages but fewer reviews.
The full ranking
Peace of Mind Structural
Based in San Mateo, Peace of Mind Structural is a general contractor with a 4.9 Google rating from 239 reviews, giving it substantial review volume.
239 reviews
Matthew Kelly Construction
Matthew Kelly Construction is recorded as a construction company on Google with a 5.0 rating from 30 reviews and an address on Union Street in San Francisco.
30 reviews
Kingdom Concrete San Francisco.
Kingdom Concrete San Francisco. is listed as a concrete contractor and carries a 5.0 Google rating across 27 reviews, with an address on Sharon Street in San Francisco.
27 reviews
The Crew Concrete & Masonry
The Crew Concrete & Masonry is categorized as a concrete contractor, holding a 5.0 rating from 13 Google reviews and located on Alemany Boulevard in San Francisco.
13 reviews
Ultra Construction
Ultra Construction, listed as a concrete contractor, has a 4.9 Google rating based on 29 reviews and is located in South San Francisco.
29 reviews
Behan Construction
Behan Construction appears as a concrete contractor with a 4.9 rating from 28 Google reviewers and an address on Genebern Way in San Francisco.
28 reviews
A.J.O. Group Build
A.J.O. Group Build is recorded as a general contractor and has a 4.9 Google rating drawn from 27 reviews; the business lists an address on Sumner Street in San Francisco.
27 reviews
Altamira Construction Company – Foundation Repair and Earthquake Retrofit
Altamira Construction Company is categorized as a general contractor with a 4.9 Google rating from 12 reviews and an address on Octavia Street in Oakland.
12 reviews
Rsl Structural Inc.
Rsl Structural Inc. shows a 4.8 Google rating across 70 reviews, is listed as a general contractor, and is located on Easton Avenue in San Bruno.
70 reviews
Frequently asked questions
How should I choose a foundation repair contractor?
Start by comparing online reviews, but also check licensing, insurance and professional affiliations. Ask for multiple written estimates that describe methods, timeline and materials, and request references for similar projects so you can verify workmanship and reliability.
What does foundation repair typically cost?
Costs vary widely depending on the size of the problem, soil conditions, access and the repair method required. Get at least two or three detailed estimates and make sure each one breaks down labor, materials and any necessary permits before signing a contract.
What should I check before hiring a company to do foundation or concrete work?
Verify that the contractor carries liability insurance and workers’ compensation, and confirm any required local permits will be obtained. Review the written contract for scope, schedule, cleanup responsibility and warranty terms, and keep copies of all communications.
How was this ranking produced?
This list is based on Google review data and uses a Bayesian-style score that balances average rating with review count so that businesses with many high ratings rank ahead of small-sample extremes. The dataset was refreshed for 2026; use these rankings as a reputation snapshot and follow up with inspections and direct quotes for your project.