HCD developed the Neighborhood Change Map to support affordable housing funding policies aimed at reducing displacement in gentrifying areas. The 2025 Neighborhood Change Map identifies census tracts (excluding rural areas) that have experienced both substantial racial/ethnic change and economic changes; while exhibiting markers of disproportionate housing need. This map advances the AFFH objective of addressing disproportionate housing need, including displacement.

The TCAC/HCD Opportunity Map identifies California regions whose characteristics have been shown by research to support positive economic, educational, and health outcomes for low-income families – particularly long-term outcomes for families with children. The map advances the AFFH objectives of increasing access to opportunity.

HCD released an interactive statewide AFFH Data Viewer 3.0 to assist in the assessment of fair housing. This refreshed version provides an enhanced user experience and access to the most recent fair housing data, including a series of new layers. The AFFH Data Viewer 3.0 consists of mapped data layers in seven categories:

• California State Fire Marshal (PDF) — Information bulletin regarding sprinkler system requirements.
• California Energy Commission updates for ADU - Blueprint Newsletter Issue 129 January 2020 – March (PDF) — ADUs and adoption of 2019 Energy Code: PV (solar panel) Requirements for ADUs

Submit an Ordinance

Although cities and counties are mandated to permit ADUs and JADUs, they are not required to adopt ADU and JADU ordinances. However, any city/county that does adopt an ADU ordinance, must submit the ordinance to HCD within 60 days.

Adopted ADU ordinances may be submitted here:

• Submit an Ordinance

Funding for Homeowners

CalHFA’s ADU Grant Program — The CalHFA ADU Grant Program provides up to $40,000 in assistance to reimburse homeowners for predevelopment costs necessary to build and occupy an ADU.

Potential State Grants and Financial Incentives

The California Health and Safety Code (HSC), Section 65583(c)(7), requires that cities and counties develop a plan that incentivizes and promotes the creation of ADUs that can be offered at affordable rent for very-low to moderate-income households.

• ADUs are an affordable type of home to construct in California because they do not require paying for land, major new infrastructure, structured parking, or elevators.
• ADUs can provide a source of income for homeowners.
• ADUs are built with cost-effective wood frame construction, which is significantly less costly than homes in new multifamily infill buildings.
• ADUs allow extended families to be near one another while maintaining privacy.
• ADUs can provide as much

See the updated ADU Handbook for changes to State ADU Law.