We will Build Your Dream ADU

Our goal then and now is to provide quality on time projects

We will Build
Your Dream ADU
Our goal then and now is to provide
quality on time projects
Click Here
Your Dream
Home Awaits
Speak with Housing Specialist Today WELCOME Get in touch
Hauser ADU is dedicated to building thoughtfully designed accessory
dwelling units at an affordable price. That’s our mission."
Click Here
Your Dream
Home Awaits
Speak with Housing Specialist Today WELCOME Get in touch

Welcome to Hauser ADU

Where We Build Your Visions

Even with a small lot no bigger than 324 square feet of space, Hauser ADU can build an ADU on your lot! Using less of your budget and rapid off-site construction methods, we are proud to claim the we have one of the smartest solutions on the market. Built with no compromises in quality, in structural sense our ADUs are likely stronger than your existing permanent structure. We can assure you that once put on a permanent foundation, our ADUs will stand the test of time.

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Our Specialization

Unlike prefab ADUs, we offer custom designs to match your unique space, budget and needs. We handle your project from design to permitting to construction with a licensed contractor. We involve you in the fun parts of design while saving you the paperwork and heavy lifting.


Modular units are shipped throughout the state of California


Hauser ADU uses environmentally friendly materials


Price below conventional construction.


Smart solar panels with an integrated DC power-optimizer


Our ADU Models are built using the highest quality material


Hauser ADU can be modular, prefab or stick build to suit your backyard

Smart Home

Lighting and appliances can be remotely controlled by Alexa or Google Home

One stop shop

Hauser ADU offers everything you need to set up your backyard home.

ADU Models


Hauser 400 ADU

The Hauser 400 ADU fits the tightest backyards. With Hauser 400, you get full-sized living, kitchen, bath, and cathedral ceilings.

  • Full bathroom
  • Kitchen with full-size appliances
  • Optional murphy bed
  • 400 square feet

Hauser 540 ADU

Our flagship 2022 Model 540 sq/ft ADU is a one bedroom, one bath luxurious but affordable guest house, designed to fit most home lots.

  • High ceilings throughout
  • Luxury vinyl plan flooring for water & scratch resistance materials
  • Two Zone Mini Split HVAC (living room & bedroom)
  • Top rated steel roof
1_Photo - 1-min

Hauser 576 ADU

Our flagship no-compromise, one-bedroom backyard living space. You get full-sized living, kitchen, bedroom and bath, plus cathedral ceilings.

  • Spacious bedroom (10′ x 14′)
  • 1 bathroom (9′ x 5.5′)
  • No-compromise kitchen, with full-size appliances, included.
  • 576 square feet

Hauser Office Studio

Hauser Office Studio are self-contained, prefabricated, office units that require minimal on site assembly.Hauser Office Studio is an excellent example of a cost-effective, easy to ship, assemble and use mobile office with a 9×13′ floorplan.



No Hassle installation

calendar (4)
Add a backyard home in as
little as 6 months
house (1)
Expand your home’s value
and livable space

How Hauser Works

Schedule A Home Visit

We meet you in person to check on a few things and ensure your backyard and Hauser ADU are a great fit

Custom Design & Build

We handle everything from customized designs to permits prior to building your Hauser ADU.

Delivery & Install

We walk you through your new Hauser ADU and explain all the features, bells, whistles, and custom details.

1_Photo - 7-min


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Cost Calculator

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
Total $

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      Contact Info

      Northern California

      Hauser Construction, San Jose, CA 95150

      Southern California

      2219 Main St. Unit #800, Santa Monica, CA 90405

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      Working Hours

      Mon-Fri: 9AM-5PM
      Sat-Sun: Closed

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