ADU Ordinance Update
August 26, 2026
City Council
Government Code Section 54957.5
SB 343 Item #10
08/26/2026 REG CC
2 New State ADU
Regulations
Mandated
requirements
Very limited local
discretion
Jurisdiction
incorporation into
local Ordinance
Submission of local
Ordinance to HCD
w/in 60 days of
adoption
Local Ordinance
deemed
compliant
Local Ordinance
deemed
null & void
3 • Maximum Number of Units
Allowed
• Maximum Floor Area
• Parking Replacement
• Occupancy
• Fire Sprinklers
4 5
Public
Resources
Code Section
21080.17
CEQA
Guidelines
Section
15282.1(h)
No further
environmental
review
required
6 Conduct
Public
Hearing
Introduce
Ordinance
ADU Ordinance Update
City of South San Francisco
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