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…