STATEWIDE UPDATE: New California ADU Bills SB13, AB68, AB881, AB670 have passed. These laws will create more options for building an ADU in 2020. To prepare for the upcoming changes use our ADU Services to learn how these laws will affect your property!

Accelerating the ADU Movement in California

Everything you need to build an Accessory Dwelling Unit in California. Check your property to learn your zoning requirements, estimate costs, and design your ADU. Then, apply for permits and meet local professionals who can help from start to finish on the ADU Marketplace.

Check your local ADU requirements

Planning to convert your garage or use your backyard to add an in-law unit? The State of California has passed new legislation (SB 1069 and AB 2299) which gives homeowners the right to build Accessory Dwelling Units (ADUs) on most single family properties, effectively doubling the housing potential of these residences.

Why build an ADU?

Building a new ADU or converting existing space can be a smart investment for many homeowners in California. Adding living space, appreciating property value, generating rental income and helping solve the housing crunch, one unit at a time are just a few reasons that building an ADU can be an excellent move. Use the city search bar above to learn about the ADU process in your city.

  • Flexible space for your family & friends
  • Appreciate your property's value
  • Generate extra 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.

How can I get my ADU built?

Our ADU Services and ADU Marketplace provide the fastest and lowest cost way to get started with your ADU project.

How does it work? Get started on your project with expert assistance and without commitment using our customized ADU Property and Design Reports as your first step. Then, get on-site visits from local contractors who can provide you with guidance and estimates for your ADU project.

Our Key Advantages

Compare all the costs and services in one place to find the best fit for your needs and budget

Order ADU zoning research, permit-ready designs and contractor estimates on one platform

Get started on your timeline and your terms, without commitment

The fastest and lowest cost way to get started with your ADU project

Our ADU Process

Expert Feasibility & Zoning Research

Use our ADU Property & Design Reports as a starting point to plan your ADU project. Our experts will do the legwork with your city or county planning office and design custom ADU concepts for your property and your needs.

Find contractors to build your ADU

Use our local contractor database to get on-site visits and cost estimates to compare services for your ADU project.

Getting your designs ready for city permitting and construction can speed up your ADU project and reduce unforseen costs later on in the process.

First, Get Free Property Zoning Check for ADU

From there, you can learn more about how to get ADU designs for your property, get contractor estimates, and get help moving your project forward. Check your property and get started!