About 4Sigma — Bay Area Remodeling Specialists

4Sigma was built on a simple premise: Bay Area homeowners deserve a remodeling contractor who brings precision, transparency, and genuine craftsmanship to every project. We specialize in residential remodeling—kitchens, bathrooms, and whole-home transformations across the Peninsula, East Bay, South Bay, and San Francisco proper.

We started 4Sigma with the belief that the remodeling industry could do better. Too many homeowners have experienced contractors who disappeared mid-project, delivered shoddy work, or charged far more than the original estimate. We set out to build a company defined by the opposite: clear communication, quality execution, and a commitment to delivering exactly what we promise.

Today, we work with homeowners throughout the San Francisco Bay Area—delivering kitchens, bathrooms, and whole-home renovations that stand the test of time.