SB 1211 for Triplex in Modesto
Own a triplex in Modesto? SB 1211 lets you stack 4 new units on top of your existing 3: 3 detached + 1 interior. At Modesto's median rent of $1,500/mo, that's ~$72K in additional gross annual rent.
The Modesto scenario
Picture the typical case: a 3-unit triplex on a Modesto block built between 1955 and 1975, with surface parking that hasn't been fully utilized in years. SB 1211 turns that parking into 3 detached units plus 1 interior conversion — 4 new doors that didn't exist before 2024.
Modesto watch: Central Valley pricing.
Small multifamily (2–4 unit) design playbook
Small multifamily lots are usually constrained on width before they're constrained on count. With a 3-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 | 3 |
| Detached ADUs (SB 1211) | 3 |
| Interior conversions | 1 |
| Total new units | 4 |
| Median 1BR rent in Modesto | $1,500/mo |
| Est. additional gross rent | $72K/yr |
| Estimated total project cost | ~$1,075K |
| Year-1 NOI estimate | ~$54K |
| Stabilized cap rate at cost | 5.0% |
| Replacement parking required | No (§66313) |
| Approval pathway | Ministerial · §66314 |
| Typical permit timeline in Modesto | 60-90 days |
Get a personalized SB 1211 feasibility report for triplex owners in Modesto
3 minutes. We email you a 4-page PDF with your buildable count, parking determination, jurisdiction overlays, and pro-forma.
No spam · free · delivered in 24 hrs