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BBB A+ Rated Structural and Waterproofing in Union City, CA

Foundation Repair, Waterproofing, and Concrete Solutions Trusted Across Northern California

Permanent Solutions Backed by 20+ Years in California

Homes in Union City and across Northern California experience challenges from expansive clay soils, seasonal rains, and seismic activity. Discover solutions crafted for your home’s structure—whether built on a crawl space or concrete slab.

Foundation

Union City’s clay soils and wet winters contribute to foundation settling and cracks. Our foundation repair services restore stability to protect your home’s integrity and value.

Crawl Space

Humidity and moisture in Union City’s crawl spaces can cause wood rot and mold growth. Our encapsulation and repair services maintain a dry, healthy environment beneath your home.

Concrete

Concrete surfaces in Union City may crack or become uneven due to soil movement and moisture cycles. Our concrete lifting and driveway repair services enhance safety and curb appeal.

1161 N Fair Oaks Ave.
Sunnyvale, CA 94089

Structural and Waterproofing Solutions You Can Trust

Union City homeowners face issues like shifting clay soils, foundation cracks, crawl space moisture, and uneven concrete common across Northern California. Backed by our San Jose Branch, Groundworks delivers permanent solutions to protect your home for the long term.

Serving Union City and Communities Across California

Our San Jose Branch team brings 20 years of experience helping homeowners across California protect their homes from challenging soil and climate conditions. From Union City to surrounding areas, we understand how bentonite clay, seasonal moisture, and seismic activity impact your foundation and concrete. With personalized inspections, transparent pricing, expert installation, and long-term warranties, Groundworks is your trusted partner for lasting repairs across Northern California.

Trusted Repairs for 20+ Years. A+ BBB Rated.

Groundworks has earned homeowner trust throughout California with expert workmanship and long-term support. These ratings reflect thousands of successful projects and decades of standing behind our work.

4.8

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4.5

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Groundworks, LLC BBB Business Review

1161 N Fair Oaks Ave.
Sunnyvale, CA 94089

All times are listed in PT

Mon
4:00am – 8:00pm
Tue
4:00am – 8:00pm
Wed
4:00am – 8:00pm
Thu
4:00am – 8:00pm
Fri
4:00am – 8:00pm
Sat
5:00am – 8:00pm
Sun
6:00am – 8:00pm
Schedule Free Inspection