Renovations, Additions,
and ADUs: built right.
Designing a project without understanding the construction cost can lead to expensive redesigns and delays. We get involved early to help keep the design practical, buildable, and aligned with your budget. For qualified projects, we can provide an initial construction estimate within 24 hours.
Licensed and insured · Fixed written price · No obligation
Your builder. On your side.
A remodel does not have to be complicated. We stripped the process down to what earns your trust: one licensed builder, an estimate within 24 hours for qualified projects, and a clean site every single evening.
- The person who quotes your project is the person who builds it.
- Qualified projects get an estimate within 24 hours, then a fixed price in writing.
- Permits, plans, and inspections handled across all three counties.
- Selections chosen with the builder, so every choice fits the written budget.
- Dust contained, floors protected, and a clean site every evening.
- The same licensed builder from first walkthrough to final inspection.
Your next build, made simple.
Five steps, one licensed builder, nothing left vague.
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We listen to what you want the room to become, and both of us see whether we're the right fit.
YOU GET AN HONEST READ ON FITA rough range for what those goals usually cost here, so
we know the budget and the vision line up before anyone commits.
Fit confirmed, we lock the plan: drawings, selections, schedule, and a fixed price, all in writing.
YOU GET A DATE AND A SIGNED PRICEDust contained, a clean site every evening, the same licensed builder on your job daily.
YOU GET A FINISHED ROOMWe walk the finished room together and close the punch list to zero before we call it done.
YOU GET A ZERO PUNCH LISTInterior builds: kitchens, baths, and every room between.
Exterior builds: the face your home shows the street.
ADU builds: a second address in the backyard.
What homeowners say
Three counties, one crew.
In Service Builders provides self-performing construction and general contracting services throughout Marin, Napa, Sonoma, and surrounding areas. We specialize in bathroom remodels, kitchen renovations, decks, pergolas, and custom ADUs, delivering quality craftsmanship, honest communication, and dependable project management from start to finish.
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Qualified projects get a real estimate, in 24 hours, free.
Five quick steps. Once we confirm the fit, your estimate comes back within 24 hours, with a time for a free site walk.
Straight answers.
01 What does a remodel or ADU cost in Marin, Napa, or Sonoma?+
It depends on the room, the structural scope, the finishes, and the conditions behind the walls. Because we take a builder led approach, we do not deal in wild internet guesses. Send the work order and you get a real, field backed estimate within 24 hours for qualified projects.
02 Why choose a builder led contractor over a designer or traditional GC?+
In the traditional model, plans are drawn before a builder looks at real costs, and expensive revisions follow. A builder led process means field experience guides your project from day one. We evaluate constructability, materials, and actual framing costs early, so your project gets built on budget without mid project compromises.
03 Do you handle permits?+
Yes. Permits, plans, and inspections across Marin, Napa, and Sonoma are part of the job, not an extra you chase yourself.
04 How soon can you start?+
Tell us your timeline in the work order and we'll be straight with you about ours at the site walk. If we can't meet your dates, we'll say so on day one, not week six.
05 Is the Preliminary Estimate really free, with no obligation?+
Yes. You get a site walk and a written scope and price. If you take it to another contractor, that's your right and your paper.
06 How long does a remodel take?+
It depends on the scope, and guessing helps nobody. Your project package includes a written schedule before construction starts, and the same licensed builder holds to it through the final walk.
07 What services do you provide?+
Bathroom remodeling, kitchen remodeling, home renovations, deck and pergola construction, exterior remodeling, garage conversions, and custom ADU construction throughout Marin, Napa, and Sonoma, and surrounding areas.
Ready to see what your home can be?
Free consultation · No pressure · No obligation