Sacramento ADU permits cost $2,500–$3,500 with one of California's fastest approval processes. See 2026 fee estimates, steps, and timeline.
An ADU permit in Sacramento costs $2,500–$3,500 for a standard unit. Base fee is $530 plus 1.2% of project value. Sacramento does not currently charge school impact fees for ADUs, which saves $1,500–$3,000 compared to LA or Bay Area.
Submit a full plan set including site plan, floor plan, and energy calculations. Plan check takes 14–28 days, with a correction round common on first submission. Sacramento's Pre-Approved ADU design library lets qualifying projects skip plan check entirely — the fastest path available.
Standard ADU permits in Sacramento take 30–60 days. Using a pre-approved design cuts this to 10–15 days for plan review. Construction inspections are scheduled throughout the build and typically have 1–2 day lead times.
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