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House Extension Professionals in Contra Costa County, CA

Expand your living space with a well-designed extension, custom built to meet your needs and preferences

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San Francisco / 25 mi
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House Extensions
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1,184 Professionals

Featured Reviews for House Extension Professionals in Contra Costa County, CA

Rhino Builders
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars5 May 2022
“Rhino was able to provide me with the most quality deck build service I felt comfortable paying for in my area. They had all of the qualifications that I was looking for and their employees were super nice and their job quality was superior.”
CA Bear Construction
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars21 July 2023
“Ca Bear is the best, for so many reasons. The first project we did with them was a complete kitchen remodel December 2020. We took down walls, opened up our entire layout and had the best experience ever. A few things that stuck out to us: The speed at which work was completed. So efficient, and that matters when you’re spending a lot of money. Everyday ended with a shop vac sweep and our home was left as clean as it could possibly be. The creative vision that Brenda had for us. I don’t have that lens so thank god for her! The communication that Brenda provided us each day, we always knew what was happening and if there were any changes. Her management was key. Our kitchen was completed 2.5 years ago now, and everyday we sit there and say, “we love our kitchen.” We just love it! After the kitchen we did a closet remodel, again, awesome. Salvador is an incredible wood worker and again, Brenda make the whole process so smooth. A year ago we did a basement and laundry room conversion into a bedroom and laundry/full bathroom. We couldn’t be happier. Everything is still looking amazing, the quality of work is superb. We are so happy. I take my referrals seriously, and I back CA Bear while heartedly. They’re good people, trustworthy and hard working. And to me that matters the most.”
A Ramos Construction Inc.
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars24 May 2019
“They constructed an in home entertainment center for our house and it turned out more than what we expected. They were courteous, friendly and very professional. Roberto, the owner, was always in contact with us to make sure we were happy with the work and I have nothing but praise for them and their work. I highly recommend them for any construction work in out out of your home.”
M and D Home Improvement
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars1 November 2021
“I've had the pleasure to work with M & D Home Improvement for the past 6 years on various high-end luxury design project. I absolutely adore this team. Marius and his crew are amazing at what they do but what I love best is how much of a problem solver Marius is. In my 10+ years of Interior Design things always come up once you get into the construction and Marius is always ready with ABC of options to solve any situation. Marius and team are real big team players and have their customer's and designer's best interest at hand. Marius is patent and understanding. A real treat to work with!”
Bay Home Remodeling
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars26 July 2018
“We moved to California a few years ago, and were a little in the dark on who to go to when we purchased our home. Our freind recommended Bay Home Remodeling for our project, and we could not be more pleased with the work. They really took the reigns and completed an amazing project for us. Tom was prompt, organized, and a pleasure to work with. Our home built in the almost 100 years ago and had minimal renovations over the years. The team helped us create a beautiful design that opened up the floor plan, and completely remodeled the house based on our life style. Tom and Gal were the lead contractors on our job, and we loved having them at the house every day. We were actually very sad when they were finished because it meant they wouldn't be a part of our day to day life. The finished product is BEAUTIFUL. Everything was completed to perfection. They made the home new, while keeping the charm of the house. The team gave us great insights along the way. When we were stuck on a decision they guided us the right direction. I loved that Tom would always include his input when we were making a design decision. His expertise and experience was invaluable in making the right calls. We found that the selection of finishes from the Bay Home Remodeling partners excellent. We love the cabinetry, flooring, and counter top. Overall we could not be more pleased with our renovated home, and our time working with Bay Home Remodeling. We would definitely recommend them to anyone looking for an excellent team to remodel their home and definitely would use them on future projects.”
BuildingCa
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars28 April 2017
“I found GreenStar Construction through word of mouth. I was impressed by the designs my colleague showed me with such a substantial budget on their home, so my wife and I decided to go with them. We were re-designing our kitchen. We changed countertops, sinks, backsplash and cabinets. The owner gave us phenomenal options to choose from within our budget. Jay has an eye for design which my wife really appreciated. He always answered our calls, answered all of our questions, and went up and beyond to make sure we stayed within our budget and were satisfied. Thanks Jay, my wife loves her new kitchen.”
Streamline Construction
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars16 May 2014
“We hired Streamline Construction to perform a bathroom remodel. The project was completed prior to the promised due date, and the result was excellent. The workers were respectful, knowledgeable, and went out of their way to accommodate our needs.”
PALADIN HOME
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars28 November 2017
“Mike, owner of Paladin Home, did a wonderful job on our bathroom! We had a rough idea of what we wanted and Mike was able to fill in the gaps and create a bathroom that was perfect for the time period of when our house was built (1915) with modern upgrades for everyday use. Mike and his employees were professional, friendly and paid close attention to all of the details. They were extremely considerate knowing this was our only bathroom (and our first remodel) and worked with us to make the process very smooth and easy. The project was completed on time and on budget with a very high quality of workmanship. We highly recommend Paladin Homes for remodels and plan to use them again on future projects, especially for our kitchen remodel.”
Covarelli Construction Co., Inc.
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars22 April 2014
“I found Dom, to be, most capable, and extremely professional in managing, building, any project he has been associated with from A to Z. I am always confident to work with him, or to give his name as a reference for any prospective Client, that would want to work with him.”
Smith and Son Construction
House Extension Professionals in Contra Costa County, CA
Average rating: 5 out of 5 stars26 December 2022
“I have several reasons for highly recommending Smith & Son Inc. Our project was the installation of a composite deck over a worn out cement patio. Out of the three quotes we received, Lance Smith not only provided us with a detailed quote very quickly, he was the only individual we met with who followed up with us by telephone to discuss his quote. This discussion led to further clarity regarding our project and savings on the overall cost, putting us within our budget. Lance recommended a particular decking material which we are extremely pleased with. Knowing we were eager to start, Lance found a way to begin our project much sooner than expected. His three man crew was led by a seasoned and experienced foreman who not only guided his team, but also checked in with us frequently to make sure we were satisfied. Noe took great pride in his work and was very eager to please. They kept the work area tidy and safely stowed their equipment at the end of their workday. We are very happy with the finished project which exceeded our expectations. We would not hesitate to use Smith & Son again and would highly recommend them to friends and family.”
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Builder FAQs
A house extension is a construction process that involves expanding the footprint of your existing home. This could be extending outwards, either to the side or rear of the house, or upwards by adding another storey. House extensions provide extra living space and can significantly increase the value of your property.

House extensions can be categorised based on direction, structure and function. The main types include rear extensions, side return extensions, wrap-around extensions, and double or single-storey extensions. More specific ones could be kitchen extensions, loft conversions, basement conversions, garage conversions or conservatories. Select the type that best suits your property and meets your space needs, if you are unsure, speaking with a local home extension builder in Contra Costa County.

Generally, house extensions are worth the investment. They provide additional living space and can dramatically increase the resale value of your home, often covering the initial investment cost. However, plan carefully and choose a reputable house extension builder to ensure a high-quality build that will add value to your property.

The cost of a house extension can vary significantly based on several factors, such as the size, complexity of the design, quality of materials used, and geographical location. However, as a rough estimate, a single-storey extension can range from £1,000 to £2,000 per square metre, whereas a two-storey extension can start at around £1,500 per square metre.

Planning a house extension involves several stages, including idea generation, design, planning permission, and construction. Consult with a house extension architect to create a design based on your needs and budget. Ensure to check with your local council about planning permissions. Finally, choose a reputable house extension builder to bring your vision to life.
Why Hire Home Builders on Houzz?
1,184Local Pros on Houzz Who Serve Contra Costa County, CA
95,000+Total Number of Reviews Left by Homeowners
Are you considering a house extension? On Houzz, you can find an extensive selection of Contra Costa County house extension professionals near you, eager to turn your vision into a reality. Whether you're planning an extra bedroom, expanding your kitchen or designing a brand-new workspace, these professionals have the skills and expertise to make your project successful. House extension professionals include architects who can draw up detailed plans and builders who will execute them to the finest standards.

Choosing a house extension professional on Houzz ensures peace of mind, knowing that you’re in safe hands. They come highly recommended with a strong track record of creating bespoke, high-quality extensions in Contra Costa County in a wide range of styles and budgets. Whether planning a new kitchen extension, adding a new storey, or just wanting more living space, find your house extension solution with us.

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