Placer County, CA Accessory Structures: ADU Impact Fees (2026)
Key Facts
- Minimum ADU size for exemption
- 750 square feet or larger
- Condition
- Voluntary deed restriction for affordability
- Fees waived
- Building permit, road network, park fees
- Verification
- Written proof required before exemption
- Standard ADU sewer charge
- 0.714 equivalent dwelling units
Summary
Placer County waives building permit fees and road and park impact fees for accessory dwelling units of 750 square feet or larger if the owner voluntarily deed-restricts the unit for affordability. Verification of the deed restriction must be filed with the county before the exemption applies.
Deed Restricted Accessory Dwelling Units. In the case where a property owner or developer voluntarily opts to deed-restrict an accessory dwelling unit that is 750 square feet or greater in size for affordability, said unit shall be exempt from payment of building permit fees and those fees identified in Placer County Code Chapter 15, Articles 15.28 (County Road Network) and 15.34 (Parks and Recreational Facilities Fees). Verification that the unit is a deed restricted accessory dwelling unit must be rendered in writing to the county prior to exemption from fees.
Full Breakdown
34 (Parks and Recreational Facilities Fees). The owner must provide written verification that the unit is deed-restricted before the county grants the exemption; without that paperwork, the standard fee schedule applies. 200, which exempts qualifying deed-restricted ADUs from sewer inspection-permit fees. 100(C) bars issuance of a building permit for any project subject to the affordable housing article until the affordable housing obligation, or an applicable fee, has been satisfied. 714 equivalent dwelling units for a standard ADU.
Violations & Fines
Building without paying applicable fees, or occupying a unit before the fee obligation or an approved equivalency proposal is satisfied, blocks issuance or extension of the building permit under Section 15.65.100(C); no certificate of occupancy issues until the affordable housing requirement or its equivalent is met under Section 15.65.180.
Frequently Asked Questions
Does building an ADU in Placer County automatically waive impact fees?
What size ADU qualifies for the Placer County fee exemption?
Are ADUs charged a separate sewer fee in Placer County?
Sources & Official References
Other rules in Placer County
California rules heatmap·Compare Placer County to another location·View the California accessory structures overview
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