The County's ADU guide allows one junior ADU alongside a new detached ADU and one attached or converted ADU. Under the 2026 state rule the County follows, owner occupancy is required only when the junior ADU shares the house's sanitation facilities.
Last verified 2026-10-18. Rules change; the Sacramento County planning desk has the final word.
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The County's ADU guide (V8, Table 1) allows a junior ADU with a new detached ADU and one attached or converted ADU. Zoning Code Table 5.11 still prints one ADU and one junior ADU, while the County's interim guidance says applicable state law controls where the Zoning Code conflicts.
Sacramento County ADU and JADU guide (V8), Table 1, p. 2; County interim state-law guidanceCounty Zoning Code Table 5.11 still requires owner occupancy for every junior ADU. The County's interim state-law guidance lists AB 1154 and says it follows applicable state code in a conflict. Gov. Code 66333(b) now requires owner occupancy only when the junior ADU shares sanitation with the home.
Sacramento County interim state-law guidance (AB 1154); Gov. Code 66333(b)| Type | Est. all-in cost | Est. rent |
|---|---|---|
| Junior ADU (inside the house) | $45,000-$80,000 | $1,175-$1,425/mo |
Estimates for a first conversation, not bids or appraisals. Source: LotUpside price book sac-2026-10.
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One on a qualifying single-family lot, under Gov. Code 66333(a). Sacramento County's ADU guide (V8, Table 1) includes that junior ADU alongside a new detached ADU and one attached or converted ADU.
Only when the junior ADU shares sanitation with the home, under Gov. Code 66333(b) as amended by AB 1154. County Zoning Code Table 5.11 still says owner occupancy is always required, but the County's interim guidance says applicable state law controls when the Zoning Code conflicts.
No. Sacramento County Zoning Code 3.9.3.D bars a junior ADU rental of 30 days or less in any circumstance, and Gov. Code 66333(g) requires a rental term longer than 30 days.
Neither. It is a screening from public records, not professional advice, and not a survey, soils report, appraisal, loan offer or permit; every number is an estimate. A licensed designer confirms the final plan, and your city or county gives final approval.