Top 10 Best ADU Contractors in Contra Costa County

We feel your pain; finding the best Accessory Dwelling Unit contractor for your dream unit can be so tough! Finding one in Contra Costa County, California can be even more challenging since we are blessed with so many general contractors eager to take on new projects – but not many skilled in what they say they do.  That’s why we put together this comprehensive list of the best ADU contractors in the area for you to choose from.  Every ADU specialist has a variety of expertise and services they can offer, from self-contained off-the-grid construction projects – extremely important in our region – to those who offer modern design projects for your new unit. This list is always expanding, so please make sure to check back often. If you find another licensed contractor that should be on the list – or one that needs to be replaced – please let us know a detailed list of amazing house remodeling companies that are always developing and know!

About: In 2005, Reggie Keding began construction design when he was doing a national remodeling. He saw the need to start his own construction company for his customers when the services they offered were limited. Wanting to provide more than just labor, he then collaborated with a home improvement franchise and led him to be the biggest single location in the United States. Raising the bar to the next level, New Key Construction emerged to serve clients the best service he has acquired from the basics to the advanced, from mini-jobs to large projects, systems to keep things clean and healthy, and design for remodeling to provide clients a high-level experience.

Services Being Offered: The services they are offering are Designing including 2D, 3D, 4D, Virtual Reality, and 3D model to scale, Interior Services for Kitchens, Bathrooms, Fireplaces, Painting, Doors & Windows, Staircases, Exterior Services for Backyard Overhaul, Decks, Outdoor Kitchens, Garage Remodelling, Firepits, and Exterior Side. They also offer Hidden Rooms, Suction Laundry Shoot, Cleaning Burning Fireplace, Water Entertainment Fireplace, Man Caves & Game Rooms, Soundproofing, and Wheelchair Accessible.

What Makes them Different: Your experience with them is the most important thing. They are obsessed over this. All their processes and methods are to give you an amazing experience. They know you will share your experience with everyone you know and they are fully aware of the power this has. After thousands of projects and feedback given, they have learned that communication is the make or break part of a contractor you hire, so they have invested in construction software that allows you to have 24/7 access to your project via their app you can easily download on your phone, tablet or computer. You can follow the whole project right from your favorite technology. You can view the schedule, see progress pictures, make notes, send messages and so much more from 1 app. On top of this they will have in person meetings/walk throughs on each phase of your job when applicable.

About: As a qualified general contractor and remodeling company, their objective is to expertly manage the construction of beautiful, quality-built projects that reflect the lifestyle, needs and taste of their customers. During the entire construction process , from design to completion, it is very important to them that the input, specific requests and concerns of their customers are an important and respected part of the remodeling project. To meet and exceed the expectations of their customers, they do their utmost.

Services Being Offered: Home Improvement, Kitchen And Bathroom Remodels, Room Additions, Interior/Exterior Painting, Windows & Doors, And Foundation & Concrete Work.

What Makes them Different: Their professional project managers will assist, consult and guide you through the entire process , from the initial customer contact, to their free home consultation, design phase and plans, permitting process, and building your new project.

About: The Home Quality Remodeling team of contractors, with over 20 years of experience under their belts, serves the San Francisco area with care, construction, renovation and remodeling to the satisfaction of every customer. What sets them apart from other contractors, aside from their wealth of experience, is their passion and dedication. They really love what they do, and they are dedicated to every project they are working on, treating every home remodeling or renovation as if it were their own. In reality, their promise to each of their customers is that until satisfaction is complete, they dedicate their services. If their clients are not satisfied, then they are neither.

Services Being Offered: Home Additions, Kitchen Remodelling, Bathroom Remodelling, In-Law Unit & ADU Remodelling, General Home Remodelling. 

What Makes Them Different:  They take great pride in staying on time and on budget, with each and every project delivering high-quality results. You can rest assured that their professional constructors will be there to provide you with the highest level of service when you are ready to build your dream.

About: Everlast Construction turns a house into a customized home that represents your personal tastes & lifestyle. A number of design elements may be included in the customization of your entire home, such as rearranging your existing floor plan, adding rooms or a second story to your home, remodeling your kitchen & bathrooms, creating an outdoor living space, and redesigning your home’s exterior. Everlast Design also provides the public with a showroom, so if you want to see those doors, tiles, flooring, etc.

Services Being Offered: Kitchen Remodel, Bathroom Remodel, Room Additions, Full Home Remodelling, and Roofing Services.

What Makes Them Different: Everlast Construction understands the significance of maintaining the firm’s solid reputation over the years. The philosophy of the owner to exclusively associate himself with great people is reflected in a committed team of experienced professionals. Design and remodeling was based on the core principles of a good work ethic, a sense of urgency, the company’s strong fiscal health, a phenomenal customer experience and a sense of justice for those involved.


4. Everlast Construction

        1270 Springbrook Road #C, Walnut Creek, California, 94595, United States






About: With 20 national and regional design awards, Gayler Design Build is an unrivaled, award-winning design-build company. Founded in 1961, they are headquartered in Danville, CA, serving the regions of the Tri-Valley and Lamorinda. Gayler has completed every project on schedule, and on budget, with an enviable 22-year track record. Gayler has been successful in carrying out the job to the satisfaction of each client, bringing personal design customization into every project, from completing whole house remodels, kitchen and bath renovations and additions, to finishing outdoor living spaces. Their systematic planning process, craft quality, commitment to excellence and direct contact (with consumers, company & supplier partners, the city and other regulatory organizations) keeps every project on track at every level. The final product, of course, keeps generations of existing customers coming through the doors, as well as new customers.

Services Being Offered: Kitchen Remodeling, Bathroom Remodeling, Home Additions, Whole House Remodeling, Outdoor Living Spaces, Uniques Spaces, and Accessory Dwelling Units Services. 

What Makes Them Different: His family-owned activities, led by George and Darlene Gayler, and son Chris Gayler, are critical to Gayler Design Build ‘s distinction. Reliable communication and personal attention are what make Gayler so special, and their written warranty of five years ensures that they stand behind their job and their word. Their hands-on approach places customer relations at the forefront of the business, and to cultivate and deliver an incredible customer experience, Gayler goes to great lengths.

About: HDR Remodeling provides services to Berkeley, Alameda, Oakland, Piedmont, and the greater East Bay Area as a full service residential Design + Build remodeling contractor. Their team has been offering quality architecture, building and residential remodeling services to homeowners for over 30 years. Their theory of architecture is to re-imagine homes as we really live today. With the specifics and quality materials that will really make your home unique, they help you find innovative ways to make the most of your existing space.

Services Being Offered: Whole-House Remodels, Outdoor Decks and Spaces, Room Additions, Garage and Basement Conversions, Accessory Dwelling Units, Guest House, or Backyard Cottages, Bathroom Remodeling, and Kitchen Remodeling.

What Makes Them Different: From the concept of design to permit-ready plans and development, their start-to – finish management process will ensure that the project is done on schedule and on budget. In Architecture, their expert designers provide one-on-one consulting services to help you decide the scope of the project to fit your budget. From the creation of schematic sketches and layout choices to the completion of final designs and elevations, they deal with technical details. Their trained and professional designers combine beauty with functionality. They offer advice on fixtures, finishes and choices of items, all while juggling the budget of the project to maximize what you get from your home remodel.

About: Eddie Design & Remodeling is a general contractor company with a license. They specialize in high-end designs for remodeling, restoration, and new building. Their mission statement says it all. Their goal is “Building The Future.” Eddie Design & Remodeling gives its clients the highest quality outcomes in each of their projects with over 100 years of cumulative experience in the building and remodeling industry. Their mission is to provide customer service, equal pricing, supreme quality, and delivery on time.

Services Being Offered: Accessory Dwelling Units, New Construction, Complete Home Remodeling, Seismic Work, Kitchen Remodeling, Bathroom Remodeling, Room Additions, and House Painting Services. 

What Makes Them Different: In their work, the evidence of their excellence is. In accordance with the unique needs and dreams of their customers, they plan and design all their projects. With full-service care and consideration, their goal is to create beautiful spaces. You would like to contact Eddie Design & Remodeling if you want a competent contractor team in the Bay Area that can exceed your expectations.

About: Homerun Design Create is a luxury home remodeling company that provides full home remodeling with creative design and construction services. They have made wonderful families fall in love with their living spaces all over again since their inception. They produce a great remodel with their imaginative designs and strong construction. Their team of professional, qualified and seasoned architects and contractors put their heart and soul into every project’s renovation and remodeling. They infuse new life into each project through their dedication, passion, and expertise and make it distinct from the other in their own distinctive style.

Services Being Offered: Additions and Accessory Dwelling Units, Blueprint and 3D Design, Home Remodeling, Kitchen Remodeling and Bathroom Remodeling Services. 

What Makes Them Different: Remodeling is a balanced blend of art and science. The subtle amalgamation of both combined with your desires and specifications contributes to a good remodel. They have the experience and knowledge of remodeling science at Home Run Design Build, along with the innovative skills to produce a genius home renovation project. At every step, their polite, competent, and innovative professionals direct and brief you until they can achieve the outcomes you desire.

About: Santa Cruz Green Builders is an organization that is deeply committed to green building design and construction. It is the best way to build, they believe, and it also pays off financially. This doesn’t mean building an extravagant house with a funny look. Green building today means: beginning with a smart design, using renewable and non-toxic materials, optimizing the use of energy and water, and building for generations to last. They have a skilled crew who do many of the in-house trades, and a large team of subcontractors with whom they work on every job. This enables them to maintain a product of high quality, monitor their timetable, and keep prices lower.

Services Being Offered: New Home Construction, Commercial Buildings and Restaurant Remodeling Services, Accessory Dwelling Units, Whole House Remodeling, Kitchen Remodeling and Solar. 

What Makes Them Different: In order to make the whole construction process as simple as possible for consumers, they work incredibly hard. Construction projects are difficult and many choices have to be taken, which can also be stressful. They use a strategy that aims to make the whole construction process less stressful and makes the project much more likely to turn out exactly as you want. Their past clients have all turned into good friends because of this commitment.

About: Perpetual Homes launched its mission in 2019 to help address California’s housing crisis. Often known as accessory dwelling units (ADUs), they specialize in offering turn-key backyard homes. Perpetual Homes provides industry professionals with over 40 years of combined real estate and home construction experience. They  got you covered, whether you are searching for an additional income source, a simpler lifestyle, or to age in place.

Services Being Offered: Perpetual Homes ADU offers Accessory Dwelling Units Services.

What Makes Them Different:  They plan your site, hook up your utilities and install your base while the ADU is under construction at the factory, and then assemble your ADU in a few days. Both city and town / county fees are charged (much reduced with the new California ADU laws) and you are the proud owner of a new ADU. If you rent out to a nice local resident in need of accommodation, appreciate the enhanced asset to your property and feel good.

Are You Planning an Accessory Dwelling Unit (ADU) But Don’t Know Who to Trust?

GGet started on your dream ADU today! New Key Construction, based in Walnut Creek California, specializes in spectacular accessory dwelling units. Our passion is to be the home for talented craftsmen who deliver beautiful projects to clients throughout the Contra Costa County region! Need a solution for your in-laws, long-term guests, or a growing family? ADUs have become the go-to popular solution for families throughout Contra Costa County! An ADU is also known as an in-law house, backyard house, guest house, or casita; basically a small home that can be built on the same lot alongside another, larger single-family home.  Ready to get started? Check out our website, our portfolio and our reviews to learn more – or give us a call to start your project today.

Top 10 General Contractors in Walnut Creek, California