SB 1211 for 12-unit apartment in Ontario

In Ontario, a 12-unit 12-unit apartment just became one of the highest-yield SB 1211 typologies — 11 new homes, ministerially approved. At Ontario's median rent of $1,900/mo, that's ~$251K in additional gross annual rent.

11new homes possible
8detached ADUs
3interior conversions
$251Kest. annual rent

The Ontario scenario

The capital stack on a typical Ontario 12-unit apartment project: existing equity (the lot itself, owned outright in many cases), construction loan against the new ADU appraised value, refi at completion against the stabilized rent roll.

Ontario-specific note: Logistics hub demand driving rents up.

Large multifamily (10+ unit) design playbook

A 12-unit complex is capped at 8 detached ADUs by statute, so the play shifts toward interior conversions: max(1, ⌊units × 25%⌋) = 3 additional units carved from common rooms, oversized lobbies, basement storage, or laundry rooms.

Pro-forma snapshot

Existing units12
Detached ADUs (SB 1211)8
Interior conversions3
Total new units11
Median 1BR rent in Ontario$1,900/mo
Est. additional gross rent$251K/yr
Estimated total project cost~$2,218K
Year-1 NOI estimate~$188K
Stabilized cap rate at cost8.5%
Replacement parking requiredNo (§66313)
Approval pathwayMinisterial · §66314
Typical permit timeline in Ontario60-100 days

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Other property types in Ontario

Duplex in Ontarioup to 3 new homesTriplex in Ontarioup to 4 new homesFourplex / 4-unit in Ontarioup to 5 new homes5-unit apartment in Ontarioup to 6 new homes6-unit apartment in Ontarioup to 7 new homes8-unit apartment in Ontarioup to 10 new homes10-unit apartment in Ontarioup to 10 new homes16-unit apartment in Ontarioup to 12 new homes20-unit apartment in Ontarioup to 13 new homes24-unit apartment in Ontarioup to 14 new homes32-unit apartment in Ontarioup to 16 new homes

12-unit apartment owners in other Inland Empire cities

12-unit apartment in Riverside~$238K/yr rent · 60-100 days12-unit apartment in San Bernardino~$224K/yr rent · 60-100 days12-unit apartment in Palm Springs~$290K/yr rent · 70-120 days12-unit apartment in Murrieta~$264K/yr rent · 60-100 days12-unit apartment in Temecula~$277K/yr rent · 60-100 days12-unit apartment in Corona~$264K/yr rent · 60-100 days12-unit apartment in Moreno Valley~$251K/yr rent · 60-100 days12-unit apartment in Fontana~$251K/yr rent · 60-100 days12-unit apartment in Rancho Cucamonga~$277K/yr rent · 60-100 days12-unit apartment in Victorville~$224K/yr rent · 60-100 days12-unit apartment in Hesperia~$224K/yr rent · 60-100 days

Topics relevant to this scenario

Short-term rentals and SB 1211ADU design under SB 1211SB 1211 in the coastal zoneSB 1211 and affordable housingSelling SB 1211 ADUs separatelySB 1211 in historic districtsCommon SB 1211 mistakesSB 1211: first steps for owners