SB 1211 for 16-unit apartment in Ontario

In Ontario, a 16-unit 16-unit apartment just became one of the highest-yield SB 1211 typologies — 12 new homes, ministerially approved. At Ontario's median rent of $1,900/mo, that's ~$274K in additional gross annual rent.

12new homes possible
8detached ADUs
4interior conversions
$274Kest. annual rent

The Ontario scenario

The capital stack on a typical Ontario 16-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 16-unit complex is capped at 8 detached ADUs by statute, so the play shifts toward interior conversions: max(1, ⌊units × 25%⌋) = 4 additional units carved from common rooms, oversized lobbies, basement storage, or laundry rooms.

Pro-forma snapshot

Existing units16
Detached ADUs (SB 1211)8
Interior conversions4
Total new units12
Median 1BR rent in Ontario$1,900/mo
Est. additional gross rent$274K/yr
Estimated total project cost~$2,419K
Year-1 NOI estimate~$206K
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 homes12-unit apartment in Ontarioup to 11 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

16-unit apartment owners in other Inland Empire cities

16-unit apartment in Riverside~$259K/yr rent · 60-100 days16-unit apartment in San Bernardino~$245K/yr rent · 60-100 days16-unit apartment in Palm Springs~$317K/yr rent · 70-120 days16-unit apartment in Murrieta~$288K/yr rent · 60-100 days16-unit apartment in Temecula~$302K/yr rent · 60-100 days16-unit apartment in Corona~$288K/yr rent · 60-100 days16-unit apartment in Moreno Valley~$274K/yr rent · 60-100 days16-unit apartment in Fontana~$274K/yr rent · 60-100 days16-unit apartment in Rancho Cucamonga~$302K/yr rent · 60-100 days16-unit apartment in Victorville~$245K/yr rent · 60-100 days16-unit apartment in Hesperia~$245K/yr rent · 60-100 days

Topics relevant to this scenario

Selling SB 1211 ADUs separatelySB 1211 in historic districtsCommon SB 1211 mistakesSB 1211: first steps for ownersShort-term rentals and SB 1211ADU design under SB 1211SB 1211 in the coastal zoneSB 1211 and affordable housing