ADU separate conveyance zoning amendment (AB 1033)
Summary
State-mandated changes let single-family lots add up to three units (detached/attached ADU, converted ADU, and junior ADU) and allow up to eight detached ADUs on existing apartment lots. Most junior ADUs no longer require the owner to live on site, and fire sprinklers can't be forced on the primary house.
At a glance
- Total mentions
- 4
- Last 30 days
- 1
Discussed at 1 meeting in the last 60 days; most recently Oct 15, 2026.
Impact analysis
The city charges no impact fees on ADUs; only school district fees apply.
Homeowners building units for aging parents or returning college kids, and apartment owners adding rental units.
Neighbors may see more garage conversions and less street parking, though commissioners noted these rules are state-mandated, not city choices.
Mentions & discussions (4)
Planning Commission — October 15, 2026
The city is considering a zoning text change that would let homeowners sell or convey their accessory dwelling units separately from the main house, as newly allowed under state law AB 1033. The item was continued so staff can further study it.
South San Francisco updates ADU rules to reflect state laws
South San Francisco updates ADU rules to reflect state laws San Mateo Daily Journal
Planning Commission — July 16, 2026
New state guidance raises the maximum number of accessory dwelling units allowed on a lot — up to four on a single-family lot. Staff cautioned that most South City lots are too small for that in practice, and the city offers handouts and a county ADU resource center to help homeowners navigate the rules.
Planning Commission — May 21, 2026
State-mandated changes let single-family lots add up to three units (detached/attached ADU, converted ADU, and junior ADU) and allow up to eight detached ADUs on existing apartment lots. Most junior ADUs no longer require the owner to live on site, and fire sprinklers can't be forced on the primary house.
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