What are the impact fees for ADUs?

Impact fees are waived or reduced when building an ADU. 

  • All impact fees are waived on ADUs less than 500 sf. 
  • All impact fees are waived, except school fees on ADUs less than 750 sf.  
  • For ADUs larger than 750 sf impact fees are proportional to the size of the primary dwelling. Ex: a 1,200 sf ADU with a primary dwelling of 2,400 sf will pay 50% of the impact fees.

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1. What are the impact fees for ADUs?
2. How much money can I save by using Placer County’s preapproved plans?
3. Is there any financial assistance in building/permitting my ADU?