4Sigma • Services & Areas
Remodeling services for Bay Area homes.
Explore kitchen, bathroom, and whole-home remodeling. Find your service area, see our completed work, and plan the next step for your home.
- Licensed & insuredCSLB #1134839
- Serving the Bay AreaSince 2022
- Google reviews5.0 on Google
- Find us onYelpHouzz
PeninsulaEast BaySouth BayTri-Valley
What would you like to change?
Choose your remodeling service.
Kitchen Remodeling
Layouts, cabinetry, countertops, lighting, and the plumbing and electrical work that bring your kitchen together.
Bathroom Remodeling
Primary suites, hallway bathrooms, walk-in showers, tile, vanities, and waterproofing tailored to your space.
Whole-Home Remodels
Coordinate kitchens, bathrooms, living spaces, and home systems within one scope and construction plan.
Where we work
Remodeling across the Bay Area.
Based in San Ramon, 4Sigma serves homeowners across the Peninsula, East Bay, Tri-Valley, and South Bay. Explore the pages below for services and planning information for your area.
Tri-Valley & South Bay
A clear starting point
From your first ideas to a defined plan.
1. Walk through your space
Book a free in-home consultation to discuss your goals, the rooms involved, and the details that matter to you.
2. Define the scope
Review layout, materials, site conditions, and permit considerations so the estimate reflects your project.
3. Plan the work
Coordinate selections, scheduling, and the construction sequence before work begins.
Let’s talk about your home.
Choose a convenient time for your free in-home consultation.