State law exempts ADUs of 750 sq ft or less from impact fees, but Sacramento's July 2026 fee sheet still treats 750 sq ft as chargeable. School fees vary by district, and the City says to check regional sanitation fees with the County.
Last verified 2026-10-18. Rules change; the City of Sacramento building desk has the final word.
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Gov. Code 66311.5(c)(1) bars impact fees on an ADU with 750 sq ft of interior livable space or less. Sacramento's July 2026 ADU Fee Estimate still waives them only through 749 sq ft and lists impact charges in its 750 sq ft example. Ask the City to reconcile this before sizing a project to the threshold.
City of Sacramento ADU Fee Estimate, form CDD-0419 (July 2026); Gov. Code 66311.5(c)(1)Ask the City of Sacramento building desk before you rely on these.
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Gov. Code 66311.5(c)(1) says no for 750 sq ft or less of interior livable space. The City's July 2026 ADU Fee Estimate, form CDD-0419, still lists impact charges at 750 sq ft, so ask the City how it applies the state rule.
City form CDD-0419 gives estimated City fees of about $5,272 for 749 sq ft, $10,624 for 750 sq ft, and $14,843 for 1,200 sq ft. Its notes say school district and regional sanitation fees need separate confirmation; these are fee-sheet examples, not a quote for your lot.
Gov. Code 66311.5(c)(3) treats an ADU under 500 sq ft as adding no 500 sq ft of assessable space for Education Code 17620. City form CDD-0226 lists published residential rates that give an estimated school fee of about $5.17-$7.23 per sq ft; confirm the final fee with the applicable district.
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.