
5.0 · 18 Reviews
Custom Home Builder In Gardena, CA
We Build Trust Loyalty Relationships
Rehab Building Co. INC builds custom homes, ADUs, and whole-home remodels across the South Bay — family owned, licensed under CSLB #991087, bonded, and fully insured.

5 Star Rated Home Builder
Building With Purpose
Rehab Building Co. INC is a family-owned design-and-build firm run by Gary and Venus Ganson since 2013, building custom homes, ADUs, additions, and remodels across Gardena and the greater South Bay. Most of our work comes from word-of-mouth and repeat clients — we run every project with commercial-grade management, honest pricing, and a jobsite you can live next to.
More About UsLicensed General Building Contractor — CSLB #991087 (Class B)
Licensed Electrical Contractor — C10
Bonded and Fully Insured
Family Owned and Operated
30+ Years Combined Experience
Financing Available
Our Services
What We Do
From ground-up custom homes to a single bathroom,
we handle the whole build under one roof.
- 01
New Construction
Ground-up custom homes built for how you actually live. We work from your architect's plans or take the project from concept through completion. Every build is run by an owner who is on site and reachable.
View New Construction - 02
ADUs and Extensions
Accessory dwelling units and home extensions that add real square footage and real value, whether it's a rental, a guest suite, or space for family. We handle the build from foundation to final finish.
View ADUs and Extensions - 03
Home Remodeling
Whole-home renovations for older properties that need more than a refresh. Structural work, electrical, finishes, and everything in between, sequenced so your home comes back better than it started.
View Home Remodeling - 04
Kitchen Remodeling
The room your family actually lives in. We rebuild kitchens from layout up, coordinating cabinetry, plumbing, and electrical in-house so the trades are not tripping over each other.
View Kitchen Remodeling - 05
Bathroom Remodeling
Full bathroom rebuilds and updates, from a guest bath to a primary suite. Careful demo, clean waterproofing, and finish work that holds up to daily use for years.
View Bathroom Remodeling - 06
Room Additions
More space without moving. We add bedrooms, offices, and living areas that tie into your existing home so the addition reads as part of the original house, not an afterthought.
View Room Additions - 07
Outdoor Design
Outdoor living built to the same standard as the house. Terraced yards, retaining walls, patios, and landscape lighting that extend your home past its walls and hold up to real use.
View Outdoor Design - 08
Other Services
If it touches your home, ask. From smaller repairs and upgrades to specialty work, we will tell you straight whether it is a project we can take on.
View Other Services

Reviews
What Our Clients Say
5.0 · 18 Google Reviews
We recently had our basement remodeled, and the entire experience was outstanding from start to finish. Gary and his team was professional, knowledgeable, and committed to delivering high-quality work. They communicated clearly throughout the project, stayed on schedule, and paid close attention to every detail. Our basement has been completely transformed into a beautiful, functional space that exceeded our expectations. The craftsmanship is exceptional, and the crew was always respectful and kept the area clean. We highly recommend Rehab Building to anyone looking for a reliable contractor for a basement remodel!
anissa gonzalez
Basement Remodeling
Rehab Building Company did an excellent job on my bathroom remodel from start to finish. The entire process was smooth, professional, and stress-free. Communication was great, the quality of the work exceeded expectations, and everything was completed on time. It was a great working with a team that truly cares about their craftsmanship and customer service. Highly recommended!
Ryan El
Bathroom Remodel
I highly recommended the Rehab Building Company. For the first time in a long time, I felt like I was dealing with a very trustworthy group of professionals. They arrived on time. They were extremely thorough and explained every part of the process. Knowledgeable and meticulous with their work area.
Trish Ryan
General Construction
Rehab Building Company gave us a beautiful new kitchen (floors, cabinets, countertops, and lighting). They also added Facia boards, gutters, and removed damaged wood and repaired stucco and painted the house. Gary Ganson is very nice to work with and thorough and reasonably priced. His crews can do any job, especially Jose and family who did the bulk of the work on our home. We are very happy!
Lisa Hagmaier
Kitchen Remodel
I couldn't be happier with the flooring installation completed by Rehab Building Co. From the initial consultation to the final walkthrough, the team was professional, punctual, and attentive to every detail. The quality of workmanship exceeded my expectations, and the new floors have completely transformed the look of my home. They kept the work area clean, communicated throughout the project, and finished on schedule. I highly recommend Rehab Building Co to anyone looking for high-quality flooring installation and outstanding customer service. Thank you for a job well done!
Olivia Romo
Flooring Installation
Great experience with this contractor in San Juan Capistrano! They did an excellent job, maintained high professional standards, and completed the work flawlessly. Highly recommend their services for anyone in Orange County
LOCUST 05
General Construction
They were on budget and on time for completion. Easy to work with and made our home Reno go smoothly.
Dusty Marie
Home Renovation
Kind, efficient, communicated well for the entirety of our project. Good advice on parts of the house we were unsure about. Would definitely entrust building again in the future with them.
Bronc Atencio
General Construction
Excellent job guys!
Juan Perez
General Construction
These guys are the best. We worked on multiple projects with them over the years and have always been satisfied.
Asif Meghani
Repeat Client
Amazing to work with 100% positive experience Gary help me through the whole project thank you guys !!!
Graig G
General Construction
Rehab Building Co. is professional, reasonably priced, and very communicative.
Amirah Meghani
Repeat Client
Gary and his crew did an amazing job on our home renovation. They completely redid our kitchen, added a bathroom, painted the exterior of the house, and handled many other projects over the course of several months. The work was completed quickly, the pricing was fair, and the quality was excellent. Gary was friendly, easy to work with, and always professional. His crew was knowledgeable, skilled, and took pride in their work. We are very happy with the results and would highly recommend Gary and his team to anyone looking for a reliable general contractor.
Ryan Keith
Full Home Renovation
Speedy and professional kitchen remodel for a rental!
Ruth Arnett Jordan
Kitchen Remodel
Gary is great to work with. Always communicated what was going on and what work was to be completed
Robert Irwin
Home Renovation
I've seen firsthand the level of care and craftsmanship this company puts into every project. They treat every job as if it were their own home and never cut corners. Their work speaks for itself—from roofing and landscaping to full construction projects. Professional, dependable, and committed to quality. I wouldn't hesitate to recommend them to anyone looking for a contractor they can trust.
Lanae Monge
General Construction
Why Choose Us
Why Homeowners
Choose Rehab
Home Builders
Licensed, Bonded, Insured
Rehab holds CSLB License #991087 as both a Class B General Building Contractor and a C10 Electrical Contractor. The company is bonded through Atlantic Specialty Insurance Company and carries workers' compensation coverage through State Compensation Insurance Fund. Documentation is available on request.
Family Owned and Operated
Gary Ganson runs the build side with more than 20 years of hands-on construction experience. Venus Ganson runs operations. You are not handed off to a project manager you have never met — you work with the people whose name is on the license.
Commercial-Grade Project Management
Rehab has delivered tenant improvements, remodels, and ground-up builds for national brands including ZARA, Forever 21, Brookdale Senior Living, and Verve Coffee. That same scheduling and coordination discipline runs every residential project.
Built on Word of Mouth
The company has grown almost entirely through referrals and repeat clients since 2013. Clients consistently describe the team as honest, responsive, and transparent on pricing.
Financing Available
Rehab works with Hearth, Enhancify, and Renew Financial so homeowners can spread project costs over time rather than delaying work they need done.
Our Process
How It Works
Reach Out
Call or send a message and you will hear back quickly, often the same day. Tell us what you are trying to build and we will tell you honestly whether we are the right fit.
Walk the Project
We come to you, walk the space, and talk through scope, materials, and what is realistic for your budget. This visit is free and there is no obligation attached to it.
Written Estimate
You get a detailed written estimate that spells out what is included. No vague line items, no numbers that move after you sign.
Build and Handoff
We schedule the work, run the trades, keep the site clean, and walk the finished project with you before we call it done.
Contact Us
Let's Talk About Your Project
Call or send a message and we will respond quickly, walk the project 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 Gardena
Homeowners Ask Us
How much does it cost to build a custom home or ADU in Gardena?
Cost depends on square footage, site conditions, finish level, and whether plans already exist. We do not publish a flat price because a real number requires seeing the property. Walk the project with us and you will get a written estimate that breaks down what is included.
Are you licensed, bonded, and insured?
Yes. Rehab Building Co. INC holds CSLB License #991087 as a Class B General Building Contractor and a C10 Electrical Contractor. We are bonded through Atlantic Specialty Insurance Company and carry workers' compensation through State Compensation Insurance Fund. We are happy to send documentation before you sign anything.
Do you offer financing options?
Yes. We work with Hearth, Enhancify, and Renew Financial, so you can finance a project rather than pay for it all up front. We can point you to the right option once we know the scope.
What areas do you serve?
We work across Gardena, the South Bay, and the greater Los Angeles area — including Torrance, Manhattan Beach, and the surrounding communities. If you are just outside that, call and ask.





