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Home Additions in San Francisco, CA

Room additions, primary suites, second stories and garage conversions that give your family more space without the stress of moving.

Home Additions project in the San Francisco Bay Area

Growing family, parents moving in, or just need a real home office? A home addition gives you the space you need without leaving the neighborhood you love. Vidalon Construction designs and builds additions across the San Francisco Bay Area that blend in with your existing home inside and out.

Types of additions we build

  • Room additions: bedrooms, family rooms and home offices
  • Primary suite additions with a bathroom and walk-in closet
  • In-law suites with their own entrance
  • Garage conversions into living space
  • Second-story additions where lot space is limited
  • Sunrooms and enclosed patios

From plans to move-in

Additions involve more moving parts than any other remodel. We coordinate the survey, drawings, engineering, permits, foundation, framing, roofing, mechanical trades, drywall and finishes. You get one project lead and one schedule instead of juggling a dozen subcontractors.

Structure matters in the Bay Area

Bay Area additions have to be designed for earthquakes, hillside lots and strict local planning rules. We follow engineered plans, tie new foundations and framing into your existing house correctly and meet California seismic codes so your addition stays solid for the long haul.

Need to make the rest of the house match? We also handle roofing, flooring and painting. Read how to plan a home addition before you start.

Reviews

Homeowners Love Their Results

★★★★★ 5.0 average rating from Bay Area homeowners
★★★★★
"They took our 1998 kitchen down to the studs and gave us the open layout we wanted. The crew cleaned up every single day and the project finished two days early. We are already planning the bathroom with them."
Maria G.
Kitchen Remodel | San Rafael, CA
★★★★★
"Clear written quote, no surprises. Our walk-in shower looks like something out of a magazine and the tile work is perfect. Communication was excellent from start to finish."
David R.
Bathroom Remodel | San Francisco, CA
★★★★★
"We needed a bedroom and bath for my mother and Vidalon handled the permits, the plans and the build. The addition blends in so well that neighbors think it was always there."
Angela T.
Home Addition | Novato, CA

Sample reviews shown for demo purposes.

Questions

Home Additions FAQs

Do home additions require a permit?

Yes. Almost every addition needs a building permit and inspections. We handle the drawings, permit application and inspection scheduling for you.

Will the addition match my existing house?

That is the goal. We match rooflines, brick or siding, windows and interior trim so the addition looks like it was always part of the home.

Is it cheaper to add on or to move?

For many families, adding on costs less than the combined price of selling, buying, closing costs and moving, and you get to stay in the neighborhood you love.

Ready for Your Home Additions Project?

Get a free, no-pressure estimate from a local San Francisco remodeling crew.

Call (415) 756-0207