Elk Grove, CA Accessory Structures: ADU Impact Fees (2026)
Key Facts
- Fee-exempt ADU size
- 750 sq ft or less
- Fee formula, larger ADUs
- Floor-area ratio x primary-unit fee
- Normalized cost per trip
- $167.00
- Fee adjusts
- Annually, each July 1
- Protest window
- 90 days (Gov. Code §66020)
- Fee due
- At building permit issuance
Summary
Elk Grove exempts accessory dwelling units of 750 square feet or less from its Measure A transportation impact fee. Larger ADUs pay a prorated fee under EGMC § 16.96.150, calculated as the ADU's floor-area ratio to the primary unit multiplied by the fee a newly built primary home would owe.
"Accessory dwelling unit" (ADU) means an attached or detached permanent dwelling unit that provides complete independent living facilities (permanent provisions for living, sleeping, eating, cooking, and sanitation) for one (1) or more persons and which is located on a lot with a proposed or existing primary dwelling. ... § 16.96.150. Calculation of fee for ADUs. ADUs greater than seven hundred fifty (750 ft2) square feet shall be subject to a fee hereunder that is equal to the ratio of the floor area of the ADU compared to the primary unit, multiplied by the fee that would be charged on the primary unit, if the primary unit was being newly built.
Full Breakdown
96 implements the Sacramento Countywide Transportation Mitigation Fee Program (Measure A) inside Elk Grove, effective January 1, 2025. 020 defines an ADU the same way the zoning code does: an attached or detached unit with complete independent living facilities on a lot with a primary dwelling. 150 sets the calculation: only ADUs larger than 750 square feet owe a Measure A fee, and the amount is the ratio of the ADU's floor area to the primary unit's floor area, multiplied by the fee that would apply to a newly built primary unit of that size.
130. 200 within the 90-day window set by Government Code § 66020, and an unfavorable decision can be appealed to the City Council within 30 days by filing a notice of appeal with the City Clerk.
Violations & Fines
The fee is collected at building permit issuance under § 16.96.100; failing to pay blocks permit issuance. A landowner who wants to challenge how the fee was calculated must file within the Government Code § 66020 protest period referenced in § 16.96.200(B) or lose the right to challenge it later, and must still pay the fee under protest while the challenge is pending under § 16.96.200(C).
Frequently Asked Questions
Does my Elk Grove ADU owe the Measure A transportation fee?
How is the ADU fee calculated?
Can I dispute the ADU impact fee?
Sources & Official References
Other rules in Elk Grove
California rules heatmap·Compare Elk Grove to another location·View the California accessory structures overview
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ADU Impact Fees in Nearby Cities
How other cities in Sacramento County handle adu impact fees.