Snapshot
Population
12,216
US Census ACS, 2024 / FBI UCR Table 8, 2024
Median home price
$3,070,000
Redfin, 2026-05
Median rent
$3,501/mo
US Census ACS, 2024
Crime / 1k
12.1
FBI UCR Table 8, 2024
Market
Price / sq ft
$1,130
Redfin, 2026-05
Months of supply
3.6
Redfin, 2026-05
Median days on market
26
Redfin, 2026-05
Renter-occupied
17.2%
US Census ACS, 2024
Median household income
$214,167
US Census ACS, 2024
Housing units
4,439
US Census ACS, 2024
Developments
No tracked developments for San Marino yet.
What you can build here — ADU
Typical SFR: 1 conversion + 1 detached ADU + 1 JADU under §23.02.25. Size: detached up to 1,200 sq ft; attached 50% of primary (min 150, max 1,200 sq ft). Height: detached 16 ft / 1 story (18 ft near transit or multifamily multistory); attached up to 25 ft or primary/zone limit (max 2 stories). Side/rear setback 4 ft. JADU max 500 sq ft. State fee exemptions apply. 60-day ministerial clock.
Last verified 2026-08-18. Not legal advice — confirm current requirements with San Marino's planning department. See the statewide ADU floor every city sits on top of.