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Top-Rated Addition to existing structure builders in Thousand Oaks - Updated Nov 2026

Avatar for Pristine Construction Inc
Pristine Construction Inc
4.9(
212
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"The experience of working with Pristine Construction greatly exceeded my expectations. At least one of the owners was on site every day, and from the moment construction started they did not skip a day of work. Everybody was friendly and knowledgeable. I can't imagine hiring another company in the future."
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+16

Response time7 hrs
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for HA My Design, Inc.
HA My Design, Inc.
5.0(
379
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Customers say: True professional

"We absolutely love our new home. We had our kitchen remodeled, our hallway, which is now our beautiful laundry area, our two bathrooms, new flooring installed in those areas, recessed lighting, new central air and heat, the electrical upgraded, new plumbing in areas that needed it, the exterior and interior painted, and our structure retrofitted. Even though we didnâ t add square footage the inside of our home is unrecognizable. Everyone that comes to our home canâ t believe the changes, and how beautiful it came out. We love it! We met with at least four other contractors before deciding to go with H&A My Design. Ben, the Project Manager, immediately made us feel comfortable, and made a great impression with us. He was with us from the get go and through to completion. Meshi was added to our project shortly after we started. So there were now two Project Managers. Meshi was an excellent and pleasant addition. Meshi and Ben were on top of everything. Between her and Ben nothing went unanswered. Every good relationship does have some stumbles, how they are resolved determines everything. Whenever we had questions or concerns during the project we immediately received a text, a phone call, or Ben or Meshi would drop by. They were hands on, and never difficult to reach. They both immediately addressed any issues we had. When the project was complete Ben and Meshi even brought our fur babies fun gifts and tasty snacks, along with a gift for us. About three months later, we noticed some issues. We contacted Meshi and Ben via text and sent pictures. She immediately sent someone out and the job was complete within 24hrs. The project took about three months to complete. Overall, we had a great experience, and we are very happy with the outcome, the professionalism, and the time frame. We would use, and highly recommend, H&A My Design for future projects, and Ben and Meshi as our Project Managers. Thank you Ben and Meshi and H&A My Design! We couldnâ t be happier."
After
Kitchen Remodel+Fireplace
Complete Home Renovation
Complete Kitchen Remodel
Complete Kitchen Remodel

+526

Response time1 day
Response rate100%
Recommended by92%of homeowners
Avatar for KN Remodeling & Supplies Inc
KN Remodeling & Supplies Inc
4.8(
63
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"The KN Remodeling team did an excellent job at our home completely remodeling 3 bathrooms, painting our entire home and rebuilding a huge planter outside. We trusted them in our home while we are out of town almost the entire time. We hired them back to do additional work in our home that they did quickly and expertly. The team was professional, very friendly, worked quickly, quietly, cleanly, and I would highly recommend them."
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+48

Response time8 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Creative Home Remodeling Group Inc.
Creative Home Remodeling Group Inc.
4.7(
257
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Free estimates

Warranties offered

"We've been in our Lakewood home over 27 years and finally made the decision to put our "60's kitchen out to pasture. We had three good contractors bid for this project. We were most impressed by Ben of Creative Home Remodeling Group. His enthusiasm, attention to detail and follow-thru remained constant from concept to completion. Ben overperformed and under promised. His crew of company contractor specialists have been with him for years, and their rapport and communication showed in the finished project. He was on site and/or in phone contact with them and us constantly. They finished ahead of time with Ben staying on task through each stage and to final inspection. No reflection on Ben or his company, but us being a first- time user of a contractor's services, we were a little green about the process, the quotation and what to expect. It is often said to add 20% to the bid for unexpected costs. There were two legitimate additions that couldn't be anticipated. They were fully explained and understood. It is important for anyone doing this, to make good notes and keep in mind what the bidder is contracting to provide and what your responsibilities will be. Ben made this clear from the start-nothing hidden. Many items required us to go to the vendor, choose, and to pay directly, outside the bid parameters. These items-specifically: the vinyl flooring, the quartz counter tops and backsplash, sink, faucet and disposal being the main ones. For the most part, only the highest expense (the cabinets) was factored into the quotation. My wife and I would use Ben and Creative Remodel again and recommend him and his Studio City company without reservation"
Complete Kitchen with White and Blue Cabinets
Complete Kitchen Modern Kitchen With Botcher Island
posses of the kitchen remodeling
Modern ADU, large space with studio and 1 bathroom, big windows
White Kitchen Cabinets

+427

Response time1 day
Response rate100%
7 neighbors recently requested a quote
Avatar for YB Builders Group Inc.
YB Builders Group Inc.
5.0(
14
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"We hired Ben to remodel our living room and kitchen, which included adding approximately 300 square feet, creating an open floor plan, and removing an enormous brick fireplace in the center of our house. From day one, Ben was amazing to work with. He was on budget, on schedule, professional throughout the entire project, and consistently anticipated potential issues before they became problems. His wealth of experience was incredibly valuable when it came to making decisions along the way, and he was always willing to offer thoughtful advice and guidance. His entire team was fantastic as well: professional, respectful, and clearly committed to doing quality work. We couldn’t be happier with the results and our experience working with Ben. We highly recommend Ben for any remodeling, building, or construction project!"
Bathroom Remodel
Master bathroom
Master bathroom
Master bedroom
Kitchen Remodel

+74

40 neighbors recently requested a quote
Avatar for Imperial Remodeling Inc
Imperial Remodeling Inc
4.6(
128
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Gino with Imperial Remodeling was fantastic. He is professional, an excellent communicator, does quality work, and is also just a really nice guy. As a woman, I didn’t want to work with someone who would be dismissive toward me or only want to deal with my husband — and that was never an issue. I’ve heard countless stories of contractors being impossible to reach and not showing up when they said they would. That was never the case with Gino. There wasn’t a single time when Gino or his crew weren’t exactly where they said they would be, exactly when they said they’d be there. He always made himself available to answer any questions we had. He does not cut corners. I stopped by the house when they were installing the hardwood floors, and he was personally going through the boxes, pulling out the best-looking pieces to use in the living areas and saving the pieces with less attractive color variations for closets or under cabinets. That’s how much care he puts into his projects. Any issue or hiccup we encountered, he made it right. He even finished ahead of schedule. Gino takes so much pride in his work and truly wants his customers to be happy. We cannot recommend him enough."
Additional Photos
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+185

Response time1 day
Recommended by89%of homeowners
Avatar for Home Renew 360
Home Renew 360
4.7(
78
)
Addition to Existing Structure - Build

Serving Thousand Oaks, CA and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Warranties offered

"We had Home Renew 360 do some major remodeling in our home. We had our kitchen, floors, and bathroom remodelled. The team did a great job. All of the team members were friendly, knowledgeable, and well prepared. We could not be happier with the team that worked on our home. ALL of them! They were clean and did excellent workmanship. They showed up on time and completed the work before the scheduled completion date. Farid was our project manager and he was excellent. He was prepared and provided us excellent service. He responded quickly to our questions, provided quality guidance, and was knowledgable to what was being done to our home and provided excellent creativity when asked about specifics of how our ideas would fit with our remodel. I would high recommend Home Renew 360 for any of your home improvement needs."
Roof in Huntington Beach
Asphalt Shingle Roof
Flat roof
Master Bathroom
Exterior Paint

+179

Response time8 hrs
Response rate100%
23 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Thousand Oaks, CA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Thousand Oaks, CA homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.