Illustration: Lindsey Bailey/Axios

Richmond has recorded more permits for accessory dwelling units (ADUs) this year than in the previous six years combined, but few of the units are move-in ready, per new city data.

Why it matters: Richmond is banking on ADUs — aka “granny flats” — to boost housing supply after scaling back neighborhood density plans in its latest zoning code draft.

State of play: Planning director Kevin Vonck told City Council members last week that ADUs are gaining popularity but adding relatively little housing.

Richmond legalized ADUs citywide in 2023, eliminating the need for individual approvals.
By the numbers: Richmond has recorded 105 ADU permits so far this year, more than double the 49 in all of 2025.

That’s up from 31 in 2024 and just nine in 2023.
Between 2020 and 2022, the city recorded just seven ADU permits.
Yes, but: Just 41 of the 201 permits recorded since 2020 have received certificates of occupancy.

Meanwhile, 24 have expired.
Zoom in: Construction costs are one hurdle, Vonck said.

Detached units are the priciest, while basement or attic conversions tend to cost less.
ADUs typically run $120,000 to $300,000 nationally, depending on size, location and site conditions, per Fannie Mae.
Where they’re popping up: ADU permit hot spots include northern Highland Park, northern Union Hill and western Manchester into Blackwell, Vonck said.

What they’re saying: A city spokesperson said Richmond wants more homeowners to take advantage of the expanded ADU rules — allowed to be up to 1,200 square feet — proposed in Code Refresh Draft 3 while emphasizing that the overhaul also encourages larger developments along major corridors.

What we’re watching: The city is exploring standardized ADU building plans that Vonck said could save homeowners tens of thousands of dollars in design costs.