El Monte, CA Accessory Structures: ADU Impact Fees (2026)
Key Facts
- Fee trigger
- ADU 750 sq ft or larger
- Fee types
- Parks, traffic, water, sewer impact fees
- Fee basis
- Prorated to primary dwelling square footage
- Exempt-unit utility rule
- No new connection unless built with new home
- Governing law
- Cal. Gov. Code Sec. 65852.2 and 65852.22
Summary
El Monte charges parks, traffic, water, and sewer impact fees on any accessory dwelling unit of 750 square feet or larger, prorated to the ADU's share of the primary dwelling's square footage, while smaller ADUs are exempt.
S.Fees/Utility Connections.1.The property owner shall pay all applicable impact fees related to an ADU seven hundred fifty (750) square feet or larger, including but not limited to, parks, traffic, water and sewer impact fees. Such fees shall be charged proportionately in relation to the square footage of the primary dwelling unit.2.No new or separate utility connection or related fees or capacity charges shall be required for an ADU described in subsection U.1.a. below, unless such ADU was constructed with a new single-family dwelling.3.For ADUs not described in subsection U.1.a. below, a new or separate utility connection may be required and related fees or capacity charges shall be proportionate to the burden of the proposed ADU based upon either its square feet or number of its drainage fixture unit ("DFU") values.
Full Breakdown
S governs fees and utility connections for ADUs and junior ADUs. 1, a property owner must pay all applicable impact fees tied to an ADU that is 750 square feet or larger, expressly including parks, traffic, water, and sewer impact fees, and those fees are charged proportionately based on the ADU's square footage relative to the primary dwelling unit. The threshold means an ADU under 750 square feet, which covers most detached and attached ADUs given the code's 850-to-1,000 square foot size caps, is exempt from these development impact fees. 2). 3). A cites as the chapter's governing state authority.
Violations & Fines
Chapter 17.110 carries no separate penalty clause for fee disputes; ADU permits are processed ministerially under Section 17.110.030.B, and fee assessment disagreements are resolved through the city's standard permit and fee appeal process. Building or occupying an ADU without paying the required impact fees, or without the underlying permit, falls under Title 17's general enforcement provision, Section 17.10.160.C, making the violation a misdemeanor punishable under Chapter 1.24, in addition to the city withholding final building sign-off until fees are paid.
Frequently Asked Questions
Do all ADUs in El Monte pay impact fees?
How is the ADU impact fee calculated in El Monte?
Does an ADU in El Monte need its own water or sewer connection?
Sources & Official References
Other rules in El Monte
California rules heatmap·Compare El Monte to another location·View the California accessory structures overview
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ADU Impact Fees in Nearby Cities
How other cities in Los Angeles County handle adu impact fees.