§ 65584.01. — 65584.01. (Amended by Stats. 2025, Ch. 593, Sec. 2.5.)

For the fourth and subsequent revision of the housing element pursuant to Section 65588, the department, in consultation with each council of governments, where applicable, shall determine the existing and projected need for housing for each region in the following manner:
(a)
The department’s determination shall be based upon population projections produced by the Department of Finance and regional population forecasts used in preparing regional transportation plans, in consultation with each council of governments. If the total regional population forecast for the projection year, developed by the council of governments and used for the preparation of the regional transportation plan, is within a range of 1.5 percent of the total regional population forecast for the projection
year by the Department of Finance, then the population forecast developed by the council of governments shall be the basis from which the department determines the existing and projected need for housing in the region. If the difference between the total population projected by the council of governments and the total population projected for the region by the Department of Finance is greater than 1.5 percent, then the department and the council of governments shall meet to discuss variances in methodology used for population projections and seek agreement on a population projection for the region to be used as a basis for determining the existing and projected housing need for the region. If agreement is not reached, then the population projection for the region shall be the population projection for the region prepared by the Department of Finance as may be modified by the department as a result of discussions with the council of governments.
(b)
(1)
Subject to the applicable deadline specified in paragraph (2), and prior to developing the existing and projected housing need for a region, the department shall meet and consult with the council of governments regarding the assumptions and methodology to be used by the department to determine the region’s housing needs. The council of governments shall provide data assumptions from the council’s projections, including, if available, the following data for the region:
(A)
(i)
Anticipated household growth associated with projected population increases.
(ii)
The Department of Finance shall consider changes in enrollment levels at campuses of the University of California or the California State University in the region, as forecasted by the University of California and the California State University pursuant to paragraph (9) of subdivision (e) of Section 65584.04, when preparing the anticipated household growth associated with projected population increases.
(B)
Household size data and trends in household size.
(C)
The percentage of households that are overcrowded within the region and the percentage of households that are overcrowded
throughout the nation. For purposes of this subparagraph, the term “overcrowded” means more than one resident per room in each room in a dwelling.
(D)
The rate of household formation, or headship rates, based on age, gender, ethnicity, or other established demographic measures.
(E)
The vacancy rates in existing housing stock, and the vacancy rates for healthy housing market functioning and regional mobility, as well as housing replacement needs. For purposes of this subparagraph, the vacancy rate for a healthy rental housing market shall be considered no less than 5 percent.
(F)
Other characteristics of the composition of the projected population.
(G)
The relationship between jobs and housing, including any imbalance between jobs and housing.
(H)
The percentage of households that are cost burdened within the region and the percentage of households that are cost burdened throughout the nation. For the purposes of this subparagraph, the term “cost burdened” means the share of very low, low-, moderate-, and above moderate-income households that are paying more than 30 percent of household income on housing costs.
(I)
The loss of units during a state of emergency that was declared by the Governor pursuant to the California Emergency Services Act (Chapter 7 (commencing with Section 8550) of Division 1 of Title 2), during the planning period immediately preceding the relevant revision pursuant to Section 65588 that have yet to be rebuilt or replaced at the time of the data request.
(J)
The housing needs of individuals and families experiencing homelessness.
(i)
The data used by the council of governments shall align with homelessness data best practices as determined by the department.
(ii)
Sources of homelessness data may include the Homeless Data Integration System administered by the Interagency Council on Homelessness, the homeless point-in-time count, or other sources deemed appropriate by the department.
(2)
The deadline for the department to meet and consult with each council of governments pursuant to paragraph (1) shall be as follows:
(A)
For the fourth, fifth, and sixth revisions of the housing element, at least 26 months prior to the scheduled revision pursuant to Section 65588.
(B)
For the seventh revision of the housing element, the applicable of the following:
(i)
With respect to the following councils of governments, at least 26 months prior to the scheduled revision pursuant to Section 65588:
(I)
The Humboldt County Association of Governments.
(II)
The Lake Area Planning Council.
(III)
The Mendocino Council of Governments.
(IV)
The County of Nevada.
(ii)
With respect to
the following councils of governments, at least 34 months prior to the scheduled revision pursuant to Section 65588:
(I)
The San Luis Obispo Council of Governments.
(II)
The Sacramento Area Council of Governments.
(iii)
With respect to all councils of governments other than those specified in clauses (i) and (ii), at least 38 months prior to the scheduled revision pursuant to Section 65588.
(C)
For the eighth and subsequent revisions of the housing element, at least 38 months prior to the scheduled revision pursuant to Section 65588.
(3)
The department may accept or reject the information provided by the council of governments or modify its own assumptions or methodology based on this information. After consultation with the council of governments, the department shall make determinations in writing on the assumptions for each of the factors listed in subparagraphs (A) to (I), inclusive, of paragraph (1) and the methodology it shall use and shall provide these determinations to the council of governments. The methodology submitted by the department may make adjustments based on the region’s total projected households, which includes existing households as well as projected households.
(c)
(1)
After consultation with the council of governments, the department shall make a determination of
the region’s existing and projected housing need based upon the assumptions and methodology determined pursuant to subdivision (b). The region’s existing and projected housing need shall reflect the achievement of a feasible balance between jobs and housing within the region using the regional employment projections in the applicable regional transportation plan. Within 30 days following notice of the determination from the department, the council of governments may file an objection to the department’s determination of the region’s existing and projected housing need with the department.
(2)
The objection shall be based on and substantiate either of the following:
(A)
The department failed to base its determination on the population projection for the region established pursuant to subdivision (a), and shall identify the population projection which the council of governments
believes should instead be used for the determination and explain the basis for its rationale.
(B)
The regional housing need determined by the department is not a reasonable application of the methodology and assumptions determined pursuant to subdivision (b). The objection shall include a proposed alternative determination of its regional housing need based upon the determinations made in subdivision (b), including analysis of why the proposed alternative would be a more reasonable application of the methodology and assumptions determined pursuant to subdivision (b).
(3)
If a council of governments files an objection pursuant to this subdivision and includes with the objection a proposed alternative determination of its regional housing need, it shall also include documentation of its basis for the alternative determination. Within 45 days of receiving an objection filed pursuant
to this section, the department shall consider the objection and make a final written determination of the region’s existing and projected housing need that includes an explanation of the information upon which the determination was made.
(4)
In regions in which the department is required to distribute the regional housing need pursuant to Section 65584.06, no city or county may file an objection to the regional housing need determination.
(d)
Statutory changes enacted after the date the department issued a final determination pursuant to this section shall not be a basis for a revision of the final determination.

Legislative History

Amended by Stats. 2025, Ch. 593, Sec. 2.5. (AB 1275) Effective January 1, 2026.