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New Home Construction and ADU

New Home Construction and ADU Contractor

Building a new home or ADU (Accessory Dwelling Unit) is one of the most significant investments you’ll ever make, and it deserves a team that takes that responsibility seriously. At BayBuilders of San Jose, we bring the expertise, craftsmanship, and personal attention needed to bring your vision to life from the ground up, serving the Bay Area including Los Altos, Palo Alto, Menlo Park, Los Gatos, and surrounding cities.

new furnished kitchen in luxury home
Beautiful kitchen room with green island and farmhouse sink
kitchen in newly constructed luxury home
kitchen in newly constructed luxury home
White Bathroom in Country House
Brand new furnished modern house in Montreal's Beaconsfield
New blue bathroom design with Marble shower Surround and mosaic accent tiles.
master bathroom in new home
kitchen in newly constructed luxury home
Green is the theme in this beautiful bathroom with brass faucets and fixtures
Beautiful renovated apartment in an apartment building with bathroom, new kitchen, new floors, balcony, all white painted
Empty modern luxurious kitchen with smart speaker.
Modern Bathroom Construction

Modern Home Renovation San Jose

There’s nothing quite like a home built specifically for you. Unlike buying an existing property and adapting to someone else’s choices, new home construction gives you complete control over every detail: the layout, the finishes, the flow, and the features that matter most to your family. We make that custom design process as smooth and enjoyable as possible.

As an interior remodeling contractor in San Jose with over 14 years of experience, we oversee every phase of your new home build from initial planning and permitting through final walkthrough. Our team coordinates all trades, including framing, foundation, roofing, plumbing, electrical, insulation, drywall, and finish work, so you have a single, accountable partner managing your project from start to finish. No finger-pointing between subcontractors. No dropped balls. Just clear communication and consistent quality at every stage.

We begin every new home building project with a thorough consultation to understand your needs, budget, and timeline. From there, our design team works with you to develop a detailed plan that reflects your lifestyle and maximizes the potential of your lot. With our 3D design and engineering capabilities, you’ll be able to walk through your future home virtually before a single nail is driven, giving you confidence and clarity before construction begins.

ADU Construction: Smart Space, Added Value

Accessory dwelling units have become one of the most popular and practical ways for Bay Area homeowners to maximize their property. Whether you’re looking to house a family member, generate rental income, or simply add flexible living space, an ADU is a smart long-term investment, and BayBuilders is the contractor to call.

We handle ADU projects of all types, including detached backyard cottages, garage conversions, and attached secondary suites. Our team is well-versed in local zoning regulations, setback requirements, and permit processes specific to San Jose and the surrounding Bay Area, so we’ll guide you through the approval process.

From compact, efficiently designed studios to fully appointed one- and two-bedroom units, we bring the same home building standards to every ADU project that we apply to full-scale residential construction, employing quality materials, skilled trades, and meticulous attention to detail every time.

Let's Build Together

Whether you’re ready to break ground on your dream home or explore what an ADU could do for your property, BayBuilders of San Jose is here to help with modern home renovation in San Jose. We’re ready to be your go-to home improvement contractor in the Bay Area. Contact us today for a free consultation and estimate.

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Customer Testimonials

Yashar M.
Quick? Yes! Affordable? Yes! Reliable? Yes! Personable? Yes! Transparent? Yes! Fair? Yes! Flexible? Yes! You tell me what else you need from a general contractor. Sam did a terrific job remodeling our bathrooms and kitchen. The job was not straight forward and had some complexities that Sam and his team perfectly took care of them all.... The job finished one day before the deadline in 6 weeks, very clean and professional. Sam takes pride in his work and treats every project like his own. He is one of those contractors we need more of in the Bay Area. I highly recommend them and will work with them again.
Duy P.
I was recommended to BayBuilders through a close friend. Met Sam Siar, one of the business owners and contractors to discuss my goal of modernizing our guest bathroom. I knew nothing about the process, materials, time for labor...any of that before meeting Sam. After a 15 min conversation to detail step by step on expectations with costs, design framework, and build; I felt confident to schedule an on-site estimate. ...Starting from the day of the quote walkthrough, Sam was timely, professional, and most importantly; came prepared with plenty of examples he thought I'd like from our first conversation. I didn't have to worry about materials, everything agreed upon was carried out exactly. No unexpected delays, additional costs, or issues. I was most concerned with retro-fitting our counter and converting our toilet to bidet but they handled it all. My wife and I are extremely pleased with how our bathroom turned out, and we'll be partnering with Sam again on our closest as the next project. Highly recommend Bay Builders because they run a smooth operation, offer fair pricing, and provide excellent quality work. Very positive experience working with a pro like Sam.
Amir A.
We chose BayBuilders after going through a few companies. Ours was a big project with major renovation, remodeling kitchen, bathrooms and a new bathroom addition. Bo, our architect, was extremely helpful. Our designer David was very helpful in guiding us through the color selection for the material. ...Bay Builders is a good company to work with since they own up to issue and they proved to show responsibility. In a big project like this we are bound to hit hurdles. Bay Builders and our project manager Sam displayed accountability and brought in experts as and when needed. They helped us through the project paying attention to customer satisfaction and ensured project completion.
Ryan P.
I hired BayBuilders to build a new guest bedroom, move a wall and doorway and build a new walk-in-pantry. Sam and his team were top notch through every step of the process. We communicated the initial design but Sam had lots of great ideas on how we could improve the flow and save money that we ended up using.... The work his team did was excellent. It's obvious that Sam is very detail oriented and holds his team to a high standard of work. The communication throughout the process was very proactive - we always knew what was going on and if timelines were being impacted by materials availability. Even with supply chains being a mess, Sam and his team finished very close to the original schedule by being creative and finding ways to get what they needed. We couldn't be happier with the finished product and will definitely be using Bay Builders for any future remodeling projects.
Adam I.
Sam and his team did a superb job on a backyard landscaping and main bathroom remodel project. We live on a sloped hill and had some rough ideas for the backyard landscaping, but were pleased to get a free quote with multiple options at varying price points that fit our budget and the overall aesthetic of our home. ...Furthermore, Sam had his crew were out within a day after settling on the design, estimate and timeline and the quick turnaround ended up being a lifesaver given an upcoming trip we had planned. We ended up contracting with them for our main bathroom remodel, which we had put off ever since we moved into our home and were thrilled with how it turned out as well. Sam is a class act through and through and will continue to go with Bay Builders for future home reno work!
Duc Quach
We worked with BayBuilders on a garage remodel. The original ideas were big, including adding a bathroom, but the end result was that we finished the walls, created a new office space, and freshened up the laundry area. We had storage cabinets on both sides of the existing garage that we wanted to repurpose in the new design. ...Sam and his crew had great input on what was feasible, and they worked with the city on permits (which also had us adjusting the scope of our project). The crews that came in were great. All of the workers were super polite and easy to talk with. Everyone was safe and the job site was clean at the end of each work day. Chris and his crew spent the most time here, and everyone was safe and the job site was clean at the end of every day. Jose did an awesome job with the electrical. Everyone listened to our ideas and took our input, and had good ideas of their own on what would really work. We would highly recommend Bay Builders.
Sarah H.
I hired Sam and David for my ADU remodeling. They were an amazing duo! Very personable(something I really appreciate), honest, efficient, timely, and most importantly for me (as I don't know much about construction), they held my hand through it all! They also covered other errands for the project that I didn't have to spend my time doing. I was also concerned about the length of time it would take to finish. They estimated about 4 weeks and they did finish it in about 5 weeks, which in the scheme of construction, that was so GREAT!!!! Once the project was done, their crew left the place so clean! I was impressed. Thank you Sam, David and crew for a job well done! Would I hire them again? Definitely!
Lynn G.
Sam and David were amazing. They were professional and honest. They kept me informed of the process (I don't live in town) and made sure we were always on the same page the entire time. They finished the project within time and under budget Would definitely use them again.
Subodh N.
We had a great experience and loved the results. The team had great communication and problems resolved quickly when they occurred as to be expected on any construction project. I would highly recommend them.

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