CalHFA ADU Grant Program

California Housing Finance Agency

Available Home Repair

About This Program

Grant to help California homeowners build or convert Accessory Dwelling Units (ADUs). Can be combined with CalHFA ADU financing. Must commit to renting the ADU to a low-income household for at least five years.

Grant covers up to $40,000 of ADU construction or conversion costs

Data last verified 2026-06-09. How we verify our data.

Key Details

  • Up to $40,000 grant for ADU construction or conversion
  • Must commit to 5-year affordability period
  • Can be combined with CalHFA ADU loan
  • For low- to moderate-income homeowners
  • Applications accepted year-round

How to Apply

Get free help applying Visit Official Program Page Track this program

(877) 922-5432

A grant-savvy contractor in Fairfax, CA can handle the paperwork, inspections, and timelines so your funding releases on schedule. Getting matched is free.

You will likely need a contractor to apply

Projects like this almost always need a licensed contractor, and many grants ask for a written estimate as part of your application. Lining up a contractor in Fairfax early keeps your application moving.

Get matched with a contractor

Each program sets its own contractor rules. Check the official program page for exact requirements.

Your application paperwork

The CalHFA ADU Grant reimburses up to 40,000 dollars of the predevelopment and non-recurring closing costs of building an accessory dwelling unit, such as site prep, architectural designs, permits, soil tests, impact fees, and surveys. You apply through a CalHFA-approved ADU lender or participant. Funding is released in rounds, so confirm a round is currently open before you count on it.

Steps to apply

  1. Confirm you own and occupy the property and meet the income limit for the current grant round.
  2. Develop your ADU plans (scope of work and budget).
  3. Contact a CalHFA-approved ADU participant or lender to start the application.
  4. Submit your ADU plans and income documentation; the grant reimburses eligible predevelopment costs.
Get the official form

Documents you will likely need

  • Proof you own and occupy the property.
  • Income documentation (pay stubs, W-2s, tax returns).
  • ADU plans: scope of work and budget.
  • Itemized predevelopment cost documents (designs, permits, soil tests, surveys).
Download this checklist (PDF)

Requirements vary by program and locality. Confirm the exact rules on the official program page. We can help you prepare your paperwork, but you submit it yourself.

Deadline: Rolling while funds last

Questions about this program?

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