Anaheim's ADU Ordinance: More Than a Dozen Ways It Blocked Backyard Homes

You want to put a small home in the backyard — for aging parents, for rental income, for a kid who can't afford a place of their own. Then you open your city's ADU code and start hitting walls: ADUs allowed only in certain zones. A two-bedroom cap. Lot-coverage limits that eat the buildable area. Parking you didn't expect. Each rule reads like settled law.

Here's the thing: a lot of those limits are exactly the ones the state has already told a city it can't apply to an ADU.

What HCD told Anaheim

In December 2021, HCD reviewed Anaheim's adopted ADU ordinance — Ordinance No. 6483, which HCD received on July 28, 2020 — and wrote back with findings under Government Code § 65852.2, the State ADU Law then in effect. HCD didn't soften it:

"HCD finds that the ordinance does not comply with section 65852.2 in several respects, noted below."

That "several respects" turned out to be a long list. The letter walks through more than a dozen distinct provisions, one bullet at a time, each pairing a piece of Anaheim's ordinance with the part of state law it collided with. HCD gave the city until January 13, 2022 to respond in writing, and warned that failing to comply "may lead to a referral to the Attorney General's Office."

To be fair, HCD also noted that "The adopted ADU ordinance meets many statutory requirements." This wasn't a teardown. It was a list of specific rules that, in HCD's reading, reached past what the state allows.

Verified against HCD's ADU Ordinance Findings Letter to the City of Anaheim (December 14, 2021), citing Gov. Code § 65852.2.

The barriers HCD flagged

Several are the exact limits a homeowner runs into at the counter:

• ADUs only in residential zones. Anaheim's tables limited ADUs to single-family and multifamily zones. HCD's position: "State law requires local agencies to permit ADUs in all areas zoned to allow single-family or multifamily dwelling residential use" — reaching into mixed-use and, potentially, commercial zones too.
• A size cap that could dip below the floor. The ordinance capped an attached ADU at "50% of main dwelling unit or 1,200 square feet (whichever is less)." HCD flagged the "whichever is less" language because "Ordinances shall not require ADUs to be less than 800 square feet."
• A two-bedroom limit. HCD read the ordinance to "appear to limit ADUs to two bedrooms" and said that language "raises concerns about limiting occupancy based on familial status" — a fair-housing problem, not just a zoning one.
• Lot coverage. Anaheim applied the underlying zone's lot-coverage standards. HCD's position: "no lot coverage, floor area ratio, open space, or minimum lot size may be applied to preclude the construction of an ADU of at least 800 square foot that is at least 16 feet in height with four-foot side and rear yard setbacks."
• Parking on a junior ADU. The ordinance ran ADU and JADU parking through the city's residential parking rules. HCD was blunt: "JADUs may not be required to have parking."
• A wall between garage spaces. Anaheim required ADU parking to be separated from the main home's garage by a permanent barrier. HCD called that a rule that "exceeds state standards as it is viewed as excessive and burdensome for the creation of an ADU."

Why this matters to you — and the fine print

If your city's ADU code still carries language like Anaheim's, HCD has already spelled out where it thinks that language runs into State ADU Law. That's worth knowing before you shrink your plans to fit a rule that may not hold up.

Two cautions. First, an HCD findings letter is HCD's interpretation of State ADU Law — here it asked Anaheim to revise the ordinance and said it would consider the city's response before taking further action. It is not a court order striking anything down, and courts are the final word. Second, the numbering has moved: the ADU standards HCD applied here, once Government Code § 65852.2, were repealed and recodified at Government Code §§ 66310–66342 by SB 477, effective March 2024. Before you lean on any of this, check the current statute and your city's adopted code, and confirm with your jurisdiction or your own counsel.

What CrossBeam does with it

When the letter lands on your desk, CrossBeam turns it around the same day: what each item is actually asking, the code or law behind it, and a written response you can hand to your team or your attorney — the back-and-forth that used to eat weeks, done in a couple of hours.