San Jose Home Addition Contractor

Expand your space. Expand your pleasure.

Serving Santa Clara and San Mateo counties and parts of the East Bay. See our complete list of Bay Area cities we serve.

Whether you would like to add a second floor, an office or expand the master suite to your San Jose home, the possibilities are endless. Using the latest technology available we can create a unique concept, provide planning, and then build your new room. Contact us for references or a job site walk-through at your home in San Jose

custom room addition bay area

Expand the living space in your San Jose home with a new addition

From floor to ceiling, we do it all…

Featured Project

San Carlos, CA

Our featured project is a new custom home, built from the ground-up . We demoed the old house and rebuilt an energy efficient and ultra-sleek modern farm house. We can do the same for your San Jose home.

Play Video

See What Other Clients in San Jose Have to Say About Us

And now you can eliminate the guesswork in your new room addition with 3D renderings!

What floorplan should you choose? What style should you get? And what about the wood, the doors, the hardware and the countertops? What if you make the wrong decision and then you have to live with it? This is the value of 3D rendering, a new service we’re offering here at Bay Builders for all our clients in .

Hard to believe, but these are 3D renderings of girl’s and a boy’s bathrooms.

And if you've hired Bay Builders for your San Jose home addition project and don't like what you see, we'll start over until we get the rendering right before we hand it off to our build team to bring your vision to life.

Highly Rated and Recommended

Our reputation throughout the Bay Area keeps on growing

Get Started with a Complimentary Consultation

You have questions. We have answers & ideas, so let's talk.

If you’re contemplating a home remodel or new build in San Jose, you may be overwhelmed with options or might even be wondering if it’s possible on your property or if you can even afford it. There are many questions that may be keeping you up at night.

Well, good news. We’re here to put your mind at ease with a complimentary consultation with a building and design expert who is also familiar with the building & remodeling regulations here in San Jose. And you’ll walk away knowing what’s possible, what your options are, and what your next steps are. You’ll have a plan!

We can’t wait to help get you on the way to your dream home. Sleep well!

yara on phone

Yara is looking forward to your call

Or submit the following form and we’ll call you to schedule an appointment for a complimentary consultation.

Check out our other San Jose home construction & remodeling services

We offer the latest in home energy performance and eco-friendly building options, as well as stress-free seamless planning for San Jose new home construction and remodeling.