SB 1211 for 5-unit apartment in Walnut Creek
In Walnut Creek, a 5-unit 5-unit apartment just became one of the highest-yield SB 1211 typologies — 6 new homes, ministerially approved. At Walnut Creek's median rent of $2,700/mo, that's ~$194K in additional gross annual rent.
The Walnut Creek scenario
The capital stack on a typical Walnut Creek 5-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.
Walnut Creek watch: Tree preservation ordinance can affect placement.
Mid-size multifamily (5–8 unit) design playbook
This is SB 1211's sweet spot. A 5-unit existing building maxes out the 8-detached cap (or comes close), so design moves are about packing detached ADUs efficiently around the existing structure and converting underutilized parking.
Pro-forma snapshot
| Existing units | 5 |
| Detached ADUs (SB 1211) | 5 |
| Interior conversions | 1 |
| Total new units | 6 |
| Median 1BR rent in Walnut Creek | $2,700/mo |
| Est. additional gross rent | $194K/yr |
| Estimated total project cost | ~$1,478K |
| Year-1 NOI estimate | ~$146K |
| Stabilized cap rate at cost | 9.9% |
| Replacement parking required | No (§66313) |
| Approval pathway | Ministerial · §66314 |
| Typical permit timeline in Walnut Creek | 75-120 days |
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