SB 1211 for Fourplex / 4-unit in Los Angeles
Los Angeles's SB 1211 math for fourplex / 4-unit owners: 4 detached ADUs (the §66323 cap), plus 1 interior conversions. Total: 5 new homes. At Los Angeles's median rent of $2,400/mo, that's ~$144K in additional gross annual rent.
The Los Angeles scenario
Run it as a sequence: stabilize existing 4 units → permit 4 detached ADUs ministerially under §66314 → convert 1 interior space into rentable units → re-tenant at Los Angeles medians.
Los Angeles watch: LA has its own ADU bonus program that stacks with SB 1211.
Small multifamily (2–4 unit) design playbook
Small multifamily lots are usually constrained on width before they're constrained on count. With a 4-unit existing footprint, the binding constraint becomes side-yard setbacks (4 ft min) and the 18-ft height limit. Two-story stacked-flat ADUs over surface parking are the highest-yield typology.
Pro-forma snapshot
| Existing units | 4 |
| Detached ADUs (SB 1211) | 4 |
| Interior conversions | 1 |
| Total new units | 5 |
| Median 1BR rent in Los Angeles | $2,400/mo |
| Est. additional gross rent | $144K/yr |
| Estimated total project cost | ~$1,344K |
| Year-1 NOI estimate | ~$108K |
| Stabilized cap rate at cost | 8.0% |
| Replacement parking required | No (§66313) |
| Approval pathway | Ministerial · §66314 |
| Typical permit timeline in Los Angeles | 60-120 days |
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