Top Rated Foundation Contractors Serving Sunnyvale, CA
If you really care about choosing a quality foundation contractor, we’re here for you. Here’s your access to the best foundation contractors serving Sunnyvale including 94087, 94086, 94085, 94089 and 94088. These foundation experts provide foundation installation and foundation stabilization, and they also work on foundation waterproofing, house leveling and slab foundation construction. For 22 years we’ve conducted the most accurate ratings and deepest research of local contractors, so you’ll be confident in choosing.
Last Updated May 15, 2026
34,356 people sourced companies in Foundation Contractor
1,924 Verified Foundation Contractor Customers Surveyed
Engineered Soil Repairs, Inc. is a design/build construction company that provides solutions to soil-related problems, including landslide and creek b...
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Main Services
Foundation Contractor
Earthquake Retrofitting
Additional Services
Foundation Repairs, Retaining Walls, Landslide Repairs, Seawalls, Creek Bank Stabilization, Drainage and Earthquake Retrofitting
Coverage Areas
Alameda County,
Contra Costa County,
Marin County,
Monterey/San Benito County,
Napa County,
San Mateo County,
San Francisco County,
Santa Clara County,
Santa Cruz County,
Solano County,
Sonoma County
Diamond Certified Foundation Contractors Serve These Sunnyvale ZIP Codes
94087, 94086, 94085, 94089, 94088
Diamond Certified Foundation Contractors In Sunnyvale
Diamond Certified foundation contractors serving Sunnyvale are rated an average of 4.8 out of 5 stars based on 350 reviews of 25 rated foundation contractors. Diamond Certified foundation contractors in Sunnyvale Avg. Star Rating.
We make you an expert at choosing a high-quality foundation contractor in the Sunnyvale area.
For those who love quality local foundation contractors.
Within our Diamond Certified Resource:
You choose from only top rated Diamond Certified foundation contractors that serve our Sunnyvale area.
You see each contractor’s deeply researched report from our research.
You’ll love and refer your friends and family to your new Sunnyvale area Diamond Certified foundation contractor. They provide expert services, including foundation footings, slab foundation construction, foundation consultation, foundation design, foundation inspection services, and more.
Every Diamond Certified foundation contractor that serves residents in 94087, 94086, 94085, 94089 and 94088 performs various specialties, including foundation drainage, foundation underpinning, foundation stabilization, foundation waterproofing, and foundation excavation.
How to Choose a Quality Sunnyvale Foundation Contractor for Your Family
Click the name of the contractor to get to their Diamond Certified Company Report page.
Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
Read their verbatim client survey responses and our researched articles.
Get helpful foundation tips if they are a Diamond Certified Expert Contributor.
Call or email them to schedule an appointment.
Become a Diamond Certified Preferred Member and Join Your Sunnyvale Neighbors
If you love quality local contractors, this is for you. Become a Diamond Certified Preferred Member (always free) and get a double performance guarantee, extra guides and tips, our annual Diamond Certified Directory, and more.
Your Diamond Certified Resource. We make you an expert at choosing.
We make you an expert at choosing local companies by giving you the most accurate ratings, deeply researched company reports and Diamond Certified Guide of all Resource Guides, which cover 70+ industries in the Auto, Home, Health and Personal service categories. Each guide contains 16 key articles that are separated into “Before, During and After the Job” tabs. These are written to guide you through each phase of hiring, starting, managing and ending a job in that specific type of service.
Diamond Certified Resource Compared to Crowd-Sourced Review Sites
Diamond Certified Resource’s ratings of local companies are based on surveys of only verified real customers, so they are the most accurate. This beats crowd-sourced review sites like Yelp, Angi or even Google that are plagued with fake, manipulated, cherry-picked and non-customer reviews, which produce inaccurate and often inflated rating scores.
Diamond Certified Resource’s deeply researched reports of top rated Diamond Certified companies include everything you need to see to be very confident in choosing a top rated local company. Each company report includes detailed quality ratings and scoring, verbatim customer survey responses, a profile video, a company story video, a capabilities table, a photo gallery, researched articles, unique expert contributions from the company’s owner, and more. This beats crowd-sourced review sites that solicit companies to “claim their business listing” and add any type of info to their profiles. This sounds good, but it has led to company profiles that are littered with false claims and incomplete info.
Sunnyvale was founded in 1850, and today, your 145,945 neighbors enjoy cider tasting, game nights, cultural festivals, four-wheeling and country dancing. Sunnyvalians use Diamond Certified foundation contractors for foundation crack repair, slab foundation construction, foundation waterproofing, crawl space repair, foundation footings, and more.
Frequently Asked Questions for Foundation Contractor in Sunnyvale, CA
Q: What are clients of Diamond Certified foundation contractors saying about contractors in Sunnyvale, CA?
A: Verified Engineered Soil Repairs, Inc. Customer, 1 of 539 "They're a great company. They did what they said they would do, and they did it in a timely fashion. The work was done under budget, and they kept me informed during the process. They were very professional, on time, under budget, and kept me informed." - Peter S. All Survey Responses for Engineered Soil Repairs, Inc.
Q: What are some of the most popular brands that Diamond Certified foundation contractors use when working with Sunnyvale residents?
A: Diamond Certified foundation contractors use top-quality brands like Sure Foundation Repair, Atlas Resistance Products, BASF, ECP (Earth Contact Products) and Tremco.
Q: What types of foundation waterproofing do foundation contractors offer?
A: Foundation contractors typically offer two main types of slab foundation construction: monolithic and post-tensioned. Monolithic slabs are poured all at once, and are the most common form of slab foundation. Post-tensioned slabs are strengthened with specially designed steel cables, making them more resistant to damage and soil movement. Both types of slab foundations are highly durable and cost-effective, and are a great choice for most residential and commercial projects.
Q: Can Diamond Certified foundation contractors work with BASF products and similar items so I can get foundation installation in Sunnyvale?
A: Yes, Diamond Certified foundation contractors in Sunnyvale can work with BASF products and similar items.
Q: What did people search for when they wanted to find the best quality foundation contractors in Sunnyvale?
A: Foundation Inspection Services
Foundation Design
House Leveling
Slab Foundation Construction
Basement Repair
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Downtown Sunnyvale is known for its modern architecture and welcoming community atmosphere. Photo: Sundry Photography
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