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Top-Rated Addition to existing structure builders in Westlake Village - Updated Nov 2026

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

Serving Westlake Village, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Pristine Construction just completed a kitchen remodel for us this December. The project was finished on time even though additional projects were added along the way. Everybody from Pristine Construction did their job in the most professional and honest way possible. Through Angie’s List reviews, I came to know their reputation. And these reviews helped me to contact Pristine. The reviews were written in a way that I saw and experienced personally the good things about Pristine Construction. My wife and I were impressed from the start. Nathan and Mike listened to our needs and tried their very best to fulfill them. In my opinion, the crews and staff are the best in their field of expertise. Throughout the project, not only our 1950s-built house had kitchen upgrade, but also had other upgrades done. These other upgrades were done without sacrificing the timeline of the project. My family are all thrilled with the result of the project. I am proud and right in choosing Pristine Construction. I will choose them again on my next home improvement projects."
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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 Westlake Village, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Customers say: True professional

"I hired Golan and H&A My Design to build an addition to my house. Golan was very professional, helpful, communicative and honest. He listened to my suggestions and gave me some great advices. The project was finished ahead of schedule and I am completely satisfied with the outcome. Highly recommend Golan and H&A My Design!"
After
Kitchen Remodel+Fireplace
Complete Home Renovation
Complete Kitchen Remodel
Complete Kitchen Remodel

+526

Response time1 day
Response rate100%
3 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 Westlake Village, 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%
8 neighbors recently requested a quote
Avatar for KN Remodeling & Supplies Inc
KN Remodeling & Supplies Inc
4.8(
63
)
Addition to Existing Structure - Build

Serving Westlake Village, CA and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"We worked with Nathan to remodel our first house this year. As first-time renovators and first-time home owners, it was a daunting task. Nathan made us feel very well taken care of he has a strong attention to detail, and we felt we knew what we were getting throughout the project. We settled on a price up front for all of the labor, with the promise that even if things came up during the project, Nathan would take care of the complications without changing the price. He kept that guarantee. We ended up expanding our job to include other work, but all of the initial work was done at the promised price with no surprises. We are now living in our renovated house, and we love it. I couldn't imagine organizing such a huge project myself, and we're deeply grateful to have had someone as reliable as Nathan taking care of everything!"
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+48

Response time8 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for So Cal Builders & Design Inc
So Cal Builders & Design Inc
4.6(
308
)
Addition to Existing Structure - Build

Serving Westlake Village, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1982

Free estimates

Warranties offered

"After several long years of designing and permitting our home remodel during the pandemic, we were searching for a good contractor to build out our remodel and second story addition. Avi and David were wonderful; very thorough in explaining the process, answering all of our questions, and settling on a price that was reasonable and within our budget. During the building process, David was very responsive, available, and receptive to changes and last minute decisions made along the way. The project took longer than anticipated and there were some unexpected setbacks, but David and Avi worked quickly to fix issues and keep the project moving forward. At the end of the project they were very responsible about making sure we were satisfied with every last detail before completing the project. Our new home is beautiful and we're very happy with how it turned out, thanks to David and all the crews at So Cal Builders."
Completely renovating both the guest and master bathrooms. In the master bathroom, we're installing a spacious walk-in shower featuring dual black-finished shower heads, elegant floating benches, and marble wall tiles. Meanwhile, the guest bathroom will have a sleek built-in tub and stylish hexagon tiles.
This project involved adding a new master bathroom to the existing house. The shower features sleek white subway tiles complemented by striking black fixtures and shower door hardware. The bathroom floor is adorned with elegant white marble tiles, providing a seamless and luxurious finish. A white shaker vanity topped with a white marble countertop completes the space, creating a clean and sophisticated look.
Experience a whole new level of indoor-outdoor living with the Torres Residence Backyard Remodel. This project highlights the addition of a kitchen sliding door, seamlessly merging your interior and exterior spaces
We remodeled the current kitchen, incorporating the addition of a new sliding door to establish a seamless indoor-outdoor living area
New pool with Baja bench and spa. New pavers, aluminum patio cover and built-in BBQ in the backyard

+563

42 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for YB Builders Group Inc.
YB Builders Group Inc.
5.0(
13
)
Addition to Existing Structure - Build

Serving Westlake Village, CA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"We recently had our kitchen remodeled, and the entire experience exceeded our expectations. From the initial consultation to the final installation, the team was professional, punctual, and paid incredible attention to every detail. They kept the work area clean, communicated with us throughout the project, and delivered exactly what they promised."
Bathroom Remodel
Master bathroom
Master bathroom
Master bedroom
Kitchen Remodel

+74

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

Serving Westlake Village, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"

Everything went very well.  The job took a little longer than expected (estimate was about 3 weeks for the whole job, but it took almost 4).   I was okay with that because it was a very big job, and I had a feeling it may take a little longer anyways.  I am happy that they didn't rush through anything just to meet a deadline. 

Gino was great to work with and gave me many great ideas for tile colors and designs, as well as colors and designs for the custom vanity and countertop.  He also made sure that the different specialist crews started their respective phases of the project on schedule and ensured that there was seamless transition from one phase of the project to the next.  The cost of the project may seem like a lot, but that is because it is a very big bathroom.  I also requested to add a few things such as more lighting as the project went on, so that added a little to the cost.  I gave the pricing a B instead of A because Gino went with a higher quality/higher cost lighting whereas I would have been okay with a lower cost lighting option from Home Depot or Lowe's.  That isn't a big deal though and is partially my fault since I could have done my own research and instructed him to go with the lower cost option.  However Gino is all about delivering a very high quality product, so his choice of lighting is consistent with that. 

Gino also makes himself available to rectify any lingering issues that may arise after the job is complete.  One example is that the water wasn't going down the drain of the shower properly the first time I used the shower, however when I brought it up to him, Gino came out and took care of the issue the same day.  It turned out to be a little debris blocking the drain from the tiling, which had to be cleared out, so not a big deal.  That gave me assurance that should anything else arise (I doubt anything will) in the future that he will come back and take care of it.    

Overall I am very satisfied with the job.  Everything was very well planned out, the communication from Gino was outstanding, and although the job took slightly longer, that wasn't a big deal because the excess time ensured increased quality.  I would recommend Gino and his crew for any job, big or small! 

"
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+185

Response time1 day
Recommended by89%of homeowners
Avatar for R Design, Inc.
R Design, Inc.
4.3(
31
)
Addition to Existing Structure - Build

Serving Westlake Village, CA and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

"I hired Ramy and his team to help me build out some closets. He was very communicative and easy to work with. The team showed up on time, collaborated with me on the design, worked fast, were very respectful of the home the whole time, and cleaned up nicely. Highly recommend R Design for any contract work!"
 Joining dining room to kitche
 Cabinets, granite counter, marble/granite floor
 Bath tub wall tiling
 Restaurant previous counter
 Marble

+193

Response time1 day
Response rate99%
10 neighbors recently requested a quote
Avatar for Home Renew 360
Home Renew 360
4.7(
78
)
Addition to Existing Structure - Build

Serving Westlake Village, 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%
28 neighbors recently requested a quote
Avatar for KN Remodeling and Supplies, Inc.
KN Remodeling and Supplies, Inc.
4.6(
65
)
Addition to Existing Structure - Build

Serving Westlake Village, CA and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"We interviewed several contractors for a remodel of our downstairs and decided to use KN Remodeling. This was a daunting remodel but Nathan guided us through it with his knowledge of the process as well as assisting with design, selection of material and the crew are very professional and pleasant. Our remodel included: kitchen, laundry room, hallways, entryway, dining and living room, staircase and master bath. We added on a few extra items - living room fireplace and I hope I can figure out how to post photos of all the work. We are very pleased and if we get a chance will work with KN again. Love our new house!"
kitchen remodel in Los Angeles and woodland hills
kitchen remodel in Los Angeles and woodland hills
kitchen remodel in Los Angeles and woodland hills
kitchen remodel in Los Angeles and woodland hills
kitchen remodel in Los Angeles and woodland hills

+128

Response time11 hrs
Response rate98%
Recommended by95%of homeowners
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FAQs for addition to existing structure building service projects in Westlake Village, 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 Westlake Village, 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.