Accelerating the ADU Movement in California

Everything you need to know about Accessory Dwelling Units (ADUs) in California, in one place. Check your zoning requirements, estimate costs, and meet local professionals who can help you expedite the process.

Check the requirements for ADUs in your city...

Interested in converting a garage into a second unit or permitting an existing in-law unit? The State of California has implemented new legislation (SB 1069 and AB 2299) which allows homeowners to develop Accessory Dwelling Units (ADUs) on most single-family properties. The state law requires cities to allow ADUs to be built in nearly all single family zones, effectively doubling the housing potential of these residences. Search your city to check your local zoning and learn about the ADU potential of your property.

Why build an ADU?

Building a new ADU, or legalizing an existing one, can be an excellent investment. It adds squarefootage to your home, which will appreciate the value of your property and provide you with extra cash flow if you choose to rent out the space. Use the city search bar above to learn more about the process in your area.

  • Flexible space for family and friends
  • Appreciate property value
  • Generate rental income
  • Create new housing one yard at a time


The unit is completely separate from the primary home. Great solution for maintaining privacy for an rental unit.


The unit is attached to the primary home. Flexible solution to expand the size of your residence and add a second unit.

Interior Conversion

Existing space is converted into seperate living space. Commonly called Junior ADUs, some can share amenities with the primary home.

Structure Conversion

Transform an existing secondary structure. Building on top of a garage is an option in certain areas too.

Planning to build an ADU?

Hausable provides information and resources to expedite the ADU development process. The best first step you can take, is to plan your project well. This can (and should) take time. No matter what stage you are at in the process, our mission is to provide you information and resources to make the process easier and more efficent.

Project Timeline

Planning & Preliminary Design (Timeline is up to you.)

  • Research the market and understand the zoning and permitting process in your city
  • Check your property for feasibility and calculate ADU potential and ROI
  • Measure your space, estimate your budget, and set goals for your timeline
  • Collect design and layout examples that you fit your needs
  • Find and connect with others who have gone through the process
  • Save contact information for local professionals who could help

Getting Started (3-6 months typical)

  • Source design/build consultations & estimates
  • Engage with lenders to plan out your options for financing
  • Finalize design & engineering for your project

Permit & Build Your ADU (6-12 months typical)

  • Submit complete permit applications and construction plans to your city
  • Make any design changes required for your project to be approved
  • Once approved, your contractor may begin construction of your project

Check the requirements for ADUs in your city...