CLIENT
TESTIMONIALS
We are so proud of the work that we do for our customers. Please take a moment and read what they have to say about their experience working with California Modulars.
WHAT
WE STAND FOR
As California's premier ADU / Modular Home provider, client satisfaction and continued trust is of utmost importance for us. Contact us today and learn more about our fail-safe satisfaction guarantee.
WHY WAIT
GET STARTED TODAY!
INTRODUCING
CALIFORNIA MODULARS ADUS
With as little as 324 square feet of space and less time than you think, you could have a ADU on your existing lot! Built off site and delivered to your residence, they're the smartest solution on the market. In most cases these homes are built stronger than your existing home. Put on a permanent foundation and attached to your existing utilities, they will stand the test of time.

Affordability

Quality

Experience

One Stop Shop

Fast

Reliable

ABOUT US
WELCOME TO CALIFORNIA MODULARS – BACKYARD ADU'S
If you’re shopping for a new accessory dwelling unit or a secondary home, you’ve come to the right place! California Modulars is a leading Northern California ADU home builder. We’ve been perfecting the art of building quality, affordable, and customizable modular homes in california.
As a locally owned and operated company based in San Jose, California, we have always aimed to provide our customers with personalized service, plentiful options, and a superior level of quality.
Why wait?
ADU Price Estimator
Use our price calculator to get an instant quote on the cost of your new home!
The price builder gives you an estimation depending on the information you provide it. Don’t consider this price to be a quote but just an estimation depending on your property type and the finish materials that you have chosen for your ADU model. But, it is important to understand what these costs include and what they exclude.
Included Costs:
- Design & Architecture Fees
- Structural, MEP & Title 24 Engineering
- Permit Processing
- Mobilization & Construction
- Project Management of all of the items above. You only deal with California Modulars local area representative.
Excluded Costs:
- Financing
- Permit and other City fees (San Jose/Santa Clara estimate coming soon)
- Soils Engineering (typically not required)
- Landscaping Design or Install (typically not required
- Fire sprinklers
- Survey
- Insurance



BLOG
Everything about developing Accessory Dwelling Units in Oakland, CA
Why build an ADU or a Granny Flat in Oakland?
What is an ADU?
