ADDITIONS
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Home Addition Contractor in Sonora CA
Custom Home Additions in Sonora CA
Adding onto your home is one of the best ways to create more space without having to move. We build custom home additions that tie in clean with your existing structure, so it feels like it was always part of the house. Whether it’s expanding living space, adding a room, or building out something new, we make sure it’s done right from the start.
Room Additions, Garages & Extensions
Every addition has its own purpose. Some are for extra living space, others for storage, garages, or growing families. We handle everything from framing and structural work to finishing, making sure the addition flows naturally with the rest of the home and functions the way it should.
Seamless Integration With Your Existing Home
One of the biggest parts of a successful addition is making sure it blends in. We take the time to match layout, structure, and overall look so the new space doesn’t feel out of place. It’s not just about adding square footage, it’s about adding value and usability to your home.
Home Addition Contractor Serving Tuolumne, Calaveras & Mariposa County
We’re based in Sonora and build home additions throughout Tuolumne County, Calaveras County, and Mariposa County. From Jamestown and Twain Harte to Murphys, Angels Camp, and Copperopolis, we help homeowners expand their space the right way.
Proven Work. Real Experience.
Our numbers
30+
YEARS OF EXPERIENCE
Thousands of
COMPLETED PROJECTS
100%
CLIENT FOCUSED APPROACH
SERVING All
Surrounding Counties and Local City's
24/7 EMERGENCY SERVICES
Our regular hours are Monday through Friday, 7:00 AM to 4:00 PM, with 24/7 emergency services available for urgent situations when time matters most.
Testimonials
Real feedback from homeowners we’ve had the pleasure of working with, sharing their experience from start to finish.
Stefanie Turner
Brett and his team are amazing! They rebuilt my house after a crazy storm ruined it. He’s a perfectionist and a very hard worker. I would definitely recommend him for the job, he truly can do it all!
Positive
Responsiveness, Quality, Professionalism, Value
Services
General construction, Remodeling, Home building
Brad Taylor
Great experience. We hired All in One Development to construct a pool house and bathroom. This building included an odd wall that is not square with the rest of the building and most contractors wouldn’t call us back after seeing the plans. Brett (owner) jumped at the opportunity. He and his team were responsive, clean, respectful and talented; we enjoyed having them around and working with them on this project. The completed building exceeded our expectations because Brett has a ton of experience and is a perfectionist, he won’t quit until it’s right. I’m definitely hiring All in One Development for any future projects and recommend them to anyone looking for a contractor.
Positive
Responsiveness, Punctuality, Quality, Professionalism
Services
Accessory building construction, Concrete pouring, Exterior finishing, Foundation pouring, Drywall installation, Install flooring, Tile work installation, Plumbing fixture installation, Interior finishing, Paint indoors, Exterior painting, Painting, Roof installation
Michael Economides
Brett and his team did an awesome job rebuilding my lower deck and stairs. He kept me informed at each point in the process, sending pics and describing the work being done. Highly recommended!
Let’s Talk About Your Project
Whether it’s a remodel, deck, or repair, reach out and we’ll take a look at what you’ve got going on.