Regional Housing Needs Allocation (RHNA)

Overview

RHNA (Government Code §65580 et seq.) is California's top-down housing allocation system. The state Department of Housing & Community Development (HCD) determines regional housing needs, the regional council of governments (COG) divides the regional number across its member cities, and each city must then adopt a Housing Element that demonstrates it has zoning capacity for its allocation in each of four income bands: very-low, low, moderate, above-moderate. An out-of-compliance Housing Element opens the city to the Builder's Remedy, state lawsuits, and loss of eligibility for transportation funding.

TOD CEQA RHNA PUD Floodplain Overlay All concepts

Key characteristics

8-year cycles — most CA cities are currently in the 6th cycle (2021–2029)
Four income bands: very-low (≤50% AMI), low (50–80%), moderate (80–120%), above-moderate (120%+)
Cities must zone for capacity, not build — but capacity has to be real
HCD certification of the Housing Element is the gate

How it appears in zoning

As the reason a city is upzoning despite local opposition
As the qualifying condition for Builder's Remedy
As the driver behind SB 9, SB 35, SB 423 being increasingly muscular
As a line-item in every CA city's staff reports on rezones

Why it matters

RHNA allocations have jumped 3–5× between the 5th and 6th cycles in most CA metros. Cities that can't demonstrate capacity are exposed to Builder's Remedy, which lets developers ignore zoning on affordable projects. RHNA is the proximate cause of most CA state-preemption force.

Watch items

Sites counted toward RHNA capacity have to actually be developable — surplus schools, freeway medians don't count
"Non-vacant sites" capacity claims require a Realistic Capacity analysis
A city can have a certified Housing Element and still be sued — certification isn't bulletproof