RHNA - Regional Housing Needs Allocation

Row houses of bright colors, with two young children playing out front.
Row houses of bright colors, with two young children playing out front.

RHNA is one of ABAG's many responsibilities to ensure that affordable housing needs are planned for everyone in the Bay Area.

RHNA - Regional Housing Needs Allocation

The Draft Regional Housing Needs Allocation (RHNA) Methodology and Final RHNA Subregional Shares was approved at the Jan 21 ABAG Executive Board meeting. Meeting a major milestone in the multi-year RHNA process, the Draft RHNA Methodology and Final RHNA Subregional Shares integrate the Plan Bay Area Final Blueprint data via the 2050 Households baseline.  The Executive Board also approved the Regional Planning Committee’s recommendation to include the equity adjustment as part of the Draft Methodology. For more information, review the RHNA Executive Board packet materials. 

Next, ABAG will submit the draft methodology to HCD for its consideration and review, in advance of RHNA finalization later this year (see schedule of key milestones for more details).  Prior to the Executive Board meeting, staff and elected officials were invited to participate in two webinars discussing the Plan Bay Area Final Blueprint and the draft RHNA methodology for allocating more than 441,000 housing units the region is required to plan for by state law via the Department of Housing and Community Development.

RHNA Background

California state law recognizes that local governments play a vital role in developing affordable housing. In 1969, the state mandated that all California cities, towns and counties must plan for the housing needs of our residents—regardless of income.

This state mandate is called the Housing Element and Regional Housing Needs Allocation, or RHNA. As part of RHNA, the California Department of Housing and Community Development, or HCD, determines the total number of new homes the Bay Area needs to build—and how affordable those homes need to be—in order to meet the housing needs of people at all income levels.

ABAG, working with the Housing Methodology Committee (HMC), then distributes a share of the region’s housing need to each city, town and county in the region. Each local government must then update the Housing Element of its general plan to show the locations where housing can be built and the policies and strategies necessary to meet the community’s housing needs.

Visit the HCD website and get the full RHNA details.

ABAG’s RHNA Responsibilities

ABAG conducts the RHNA process every eight years as required by state law. 

The schedule of key milestones provides more details.

The last completed cycle is from 2015 to 2023. The RHNA is required to be consistent with the growth pattern from the region’s long-term land use and transportation plan, Plan Bay Area.

The RHNA process has many components, as follows:

Region’s Total Housing Need

HCD identifies the number of housing units needed across all income levels for the San Francisco Bay Area for the eight-year RHNA cycle. In a letter dated June 9, 2020, HCD provided ABAG with the Regional Housing Needs Determination (RHND) for the Bay Area:

ABAG Regional Housing Needs Determination from HCD

Income Category


Housing Unit Need

Very Low









Above Moderate






View the following documents to learn more about the Bay Area’s RHND:

Housing Methodology Committee

Working with elected officials, local staff and stakeholders, ABAG develops a methodology to distribute to each local government a fair share of the total number of housing units by income the Bay Area needs to add.  The Housing Methodology Committee (HMC) began meeting in October of 2019.

On Friday, September 18, 2020, the HMC recommended a proposed RHNA methodology for the San Francisco Bay Area after nearly a year of meetings.  The recommended proposed methodology was presented and approved by the Regional Planning Committee and the Executive Board, information is available in the  packet for this meeting .

Local Jurisdiction Survey and Fair Housing Report

By law, ABAG is required to survey its member jurisdictions to gather information to inform the development of the RHNA methodology. Recent legislation also requires ABAG to collect information on jurisdictions’ fair housing issues, strategies and actions for achieving fair housing goals. ABAG conducted the survey in early 2020 and compiled a summary of the results.

Local Housing Element Updates

Once a local government has received its final RHNA from ABAG, it must revise the Housing Element of its general plan and update zoning ordinances to accommodate its portion of the region's housing need. Communities are also required to report their progress to HCD annually.


As part of the RHNA process, local jurisdictions have the opportunity to form a subregion to conduct an allocation process that parallels — but is separate from — the regional process.

Once each subregion receives its share of the total housing need by income, it must meet the same statutory requirements and follow the same steps as the regional allocation process.

Every subregion must develop its own methodology, issue draft allocations to member jurisdictions, conduct the revision and appeal processes, and issue final allocations.

One subregion formed in Solano County for the 2023-2031 RHNA. It includes all jurisdictions in the county. On January 21, 2021, the ABAG Executive Board approved the Final Subregional Share for the Solano Subregion:

Subregion Very Low Low Moderate Above Moderate TOTAL
Solano County 2,803 1,612 1,832 4,745 10,992


RHNA@bayareametro.gov. Interested in getting updates on RHNA?  Add yourself to the RHNA Mailing List.

Housing Policy Tool Kits

HCD Building Blocks Housing Element Toolkit: Visit the HCD website for a comprehensive toolkit that offers step by step instructions on how to put together an effective Housing Element.

Housing Policy Toolkit, Regional Housing Forum [PDF]: Download ABAG’s own housing toolkit “Maintaining Housing Affordability and Neighborhood Stability in the Bay Area.” We cover a series of policy recommendations published by a number of organizations.>

Housing Policy Directory & Toolkit: Find out what housing policies are in use in communities throughout the Bay Area and learn more details about housing best practices, including key issues to consider and links to sample ordinances.

The California Department of Housing and Community Development (HCD) identifies the total number of homes for which each region in California must plan in order to meet the housing needs of people at all income levels. This is known as the Regional Housing Needs Determination (RHND). ABAG is responsible for developing a methodology to allocate a portion of the RHND to every local government in the Bay Area.

View the following documents to learn more about the Bay Area’s RHND:

A recent webinar provided local staff with a template PowerPoint to assist staff they prepare for upcoming housing element update.  ABAG-MTC staff presented an overview of the Regional Housing Needs Allocation (RHNA) process and a high-level analysis of new housing element site requirements and impacts on existing RHNA sites. 

View the webinar recording. The password is 9u569V$6.


Learn more about ABAG’s most recently completed RHNA process.  More information is available for the older RHNA processes. View documents from 2007–2014 and 1999–2006.

See how local jurisdictions have done in meeting their RHNA goals over the years:

Image is a graphic typewriter

Subscribe to the RHNA Mailing List

Join the RHNA mailing list to receive email updates about the initiative and ways to get involved.