Eastvale, CA Accessory Structures: ADU Impact Fees (2026)
Key Facts
- Fee-free threshold
- 750 sq ft or less
- Above threshold
- Fees prorated to primary dwelling size
- JADU cap
- 500 sq ft, always fee-free
- Pre-2020 unpermitted ADUs
- Exempt once legalized
- Appeal deadline
- 10 days to Planning Commission
Summary
Eastvale waives development impact fees entirely on an accessory dwelling unit of 750 square feet or less, including a junior ADU, under Municipal Code Section 120.04.010(f)(2). A larger ADU pays impact fees prorated to its share of the primary dwelling's square footage instead of a flat charge.
(2)No impact fees shall be imposed on accessory dwelling units with 750 square feet of interior livable space or less, including junior accessory dwelling units. For accessory dwelling units with more than 750 square feet of interior livable space, impact fees shall be charged proportionately in relation to the square footage of the primary dwelling. No impact fees shall be imposed on a permit approved for a previously unpermitted accessory dwelling unit constructed prior to January 1, 2020 pursuant to subsection (f)(11) below.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 16 Update 1).
Full Breakdown
010(f)(2) sets Eastvale's accessory dwelling unit fee rule inside the state ADU framework: no impact fees of any kind apply to an ADU or JADU with 750 square feet of interior livable space or less. That threshold covers most units the code allows, since a JADU is capped at 500 square feet under subsection (c)(6) and a one-bedroom ADU is capped at 850 square feet under (d)(2)a, only 100 square feet above the fee-free line. Once a unit exceeds 750 square feet, such as a two-bedroom ADU built to the 1,000-square-foot maximum, the city charges impact fees proportionately, calculated against the size of the primary dwelling on the lot rather than as a flat per-unit charge.
The subsection also protects existing unpermitted construction: an ADU built without permits before January 1, 2020 that is later legalized through subsection (f)(11)'s process is exempt from impact fees regardless of its size. 010(b)(1), separate from any building permit valuation fees charged under the adopted building code.
Violations & Fines
There is no separate criminal violation tied to this fee subsection; a disputed fee determination is instead addressed through the accessory dwelling unit permit appeal process in Section 120.04.010(b)(6), which lets an applicant appeal to the planning commission within ten days of the community development director's decision, accompanied by the appeal fee set by city council resolution.
Frequently Asked Questions
Does Eastvale charge impact fees on an ADU?
How are fees calculated for a larger ADU?
Are older, unpermitted ADUs charged fees when legalized?
Sources & Official References
Other rules in Eastvale
California rules heatmap·Compare Eastvale to another location·View the California accessory structures overview
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ADU Impact Fees in Nearby Cities
How other cities in Riverside County handle adu impact fees.