See if you can add new units to your residential property

You may be able to add additional accessory dwelling units (ADUs), also known as granny flats, in-law units, cottages, or garage apartments to your existing or proposed building.

What to do

1. Decide if an ADU is right for you

Think about these things to help you decide whether to build an ADU:

  • An ADU cannot be used for short-term rentals
  • Renting out your ADU will likely increase your income tax
  • If your existing building is under rent control, the ADU will be subject to rent control
  • In most cases an ADU cannot be sold separately from the main property
  • Adding an ADU will likely increase the value of your property, which means you will pay more property tax

2. Check if you are eligible to add an ADU to your property

Single-family property owner:

Check if you can add an ADU online.

Multi-family property owner:

Schedule an appointment with a City planner to talk about ADU options. 
You can also drop-in and speak to someone at the ADU counter. See the Get help sidebar for location and hours.

Why build an ADU?

To make more housing available, the City has made it easier to build ADUs. You can use the space for family members or to rent out for extra income.

Get help

SF Planning Department, ADU Counter

1660 Mission Street
, 5th Floor

San Francisco, CA 94103

Mon to Tue, 8:00 am to 4:00 pm

Wed, 10:00 am to 4:00 pm

Thu to Fri, 8:00 am to 4:00 pm

Last updated October 22, 2019

Department