5.0 · 18 Reviews
Room Additions In
Gardena, CA
Rehab Building Co. INC builds room additions across Gardena and the South Bay — bedrooms, offices, and living space that tie into the home you already have, so the addition reads as part of the original house.
Room Additions
What's Included in a Room Addition
A room addition adds square footage to your existing home rather than building something separate. It is the right move when the layout works but the house has run out of space. The hard part is making the new space look like it was always there, and that comes down to framing, rooflines, and matched finishes.
Site walk and written project estimate
Foundation and structural framing
Roofline and exterior tie-in
Electrical under our C10 license
Insulation, drywall, and finishes
Matching existing interior finishes
Final walkthrough and punch list
Our Process
How Our Room Addition Process Works
Free Consultation
Call and we will walk the house and the lot with you, look at where an addition can realistically go, and talk through what it will involve.
Plans and Estimate
We work through size, layout, and how the addition connects to the existing home, then give you a written estimate that spells out scope and materials.
Scheduling
We sequence framing, mechanical, and finish trades before we open up the house, which keeps the exposed period as short as possible.
Construction
Foundation, framing, roof tie-in, electrical, and finishes. Since you are usually living in the home during the build, we contain the work area and keep the rest of the house usable.
Final Walkthrough
We walk the finished addition with you, close the punch list, and clean the site before we call it done.
Ready to Add On?
Call us and we will walk the property with you, tell you honestly where an addition can go, and follow up with a written estimate.
Call (626) 244-4503- Free on-site estimates
- Licensed, bonded, and insured — CSLB #991087
- Owner on every project
- Financing options available
Why Choose Us
Why Choose Rehab
Building Company
For Your Addition
Class B Structural License
Room additions are structural work. Rehab holds a Class B General Building Contractor license under CSLB #991087, which is what that work requires, alongside a C10 electrical license.
Additions That Match
The team has more than 30 years of combined experience across multiple trades, which is what it takes to match rooflines, siding, and interior finishes so the addition does not look bolted on.
You Stay in the House
Zero-footprint jobsite practices keep the work area contained. Most addition clients live in the home throughout the build.
Owner Coordination
Gary Ganson coordinates the trades directly. On an addition, where framing, roofing, electrical, and finish work all have to line up, that single point of contact keeps the schedule from slipping.
Financing Available
Rehab works with Hearth, Enhancify, and Renew Financial, which can make an addition workable without moving house.
What Our Clients Say
“They were on budget and on time for completion. Easy to work with and made our home Reno go smoothly.”
Contact Us
Let's Talk About Your Addition
Call or send a message and we will respond quickly, walk the property with you in person, and put an honest written estimate in your hands.
- (626) 244-4503
- [email protected]
- Monday – Friday, 7:00am – 5:00pm
- InstagramFacebookGoogle
- Free on-site estimates
- Licensed, bonded, and insured — CSLB #991087
- Family owned since 2013
- Financing options available
FAQ
Common Questions About
Room Additions
How much does a room addition cost in Gardena?
Cost depends on square footage, whether the addition is single or two-story, how it ties into the existing roof, and finish level. We give a written estimate after walking the property, not a number over the phone.
Will the addition match the rest of my house?
That is the whole job. Matching rooflines, exterior finish, and interior trim is what separates an addition that looks original from one that looks tacked on, and it is where the team's multi-trade experience earns its keep.
What areas do you build additions in?
We work across Gardena, the South Bay, and the greater Los Angeles area, including Torrance, Manhattan Beach, and the surrounding communities.