Accelerating the ADU Movement in California

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

Go To Your City in CA

The State of California has implemented new legislation (SB 1069 and AB 2299) which allows homeowners to add Accessory Dwelling Units (ADUs) to their properties. The ordinance is required in all jurisdictions, check your city above to see if you can add an ADU to your property, convert a garage into guest quarters or legalize an existing in-law unit.

Why Build an ADU?

Adding an ADU, or legalizing an existing one, is an excellent investment. It gives you additional squarefootage and consequently appreciates your property value. Then you can rent it out or sell to invest in another property. Use city search above to learn more about actual numbers for your area.

  • Flexible space for family and friends
  • Appreciate property value
  • Generate rental income
  • Help solve the housing crunch (one home at a time)


The unit is separated from primary home. Best solution for independent rental unit maintaining privacy.


The unit is attached to the primary home. Flexible solution to extand size of your residence or rent it out.

Interior Conversion

Existing space in converted into independent apartment or Junior ADU (JADU) that can share amenities.

Structure Conversion

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

How to Build or Convert an ADU?

Hausable aims to give you tools and knowledge to understand the process of getting an ADU before you start your project. It is important to research all the pieces before you commit to anything. Some of them are straightforward, for some you need to talk with a professional, and we can connect you with lenders and contractors who specialize in ADUs in your local area. It is a lengthy process so better start now!

Project Timeline

Pre-Planning (typically 3-12 months)

  • Research the zoning and permitting process
  • Measure your space, estimate your budget, set timeline goals
  • Collect design examples you like
  • Save contact information for professionals who could help
  • Connect with others who have gone through the process

Start the Process (typically 3-6 months)

  • Source Design/Build consultations & estimates
  • Engage with lenders to decide on your financing plan
  • Decide on ADU type & design

Build Your Project (typically 6-12 months)

  • Finalize the Design & Engineering plans to submit for permits
  • Submit Project for Local Permit Approvals & Make Any Changes Required
  • Upon Approval You May Start Construction of the Project

Learn what ADUs are allowed, zoning and ROI in your city in CA