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Huntington Park, CA Accessory Structures: ADU Impact Fees (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified October 2026

Key Facts

ADU exempt from impact fees
Less than 750 square feet of interior livable space
JADU exempt from impact fees
Less than 500 square feet of interior livable space
ADU of 750 square feet or more
Proportional share of the fee
Primary dwelling
Full amount of all applicable impact fees
Converted ADU utilities
No connection fee or capacity charge

Summary

In the City of Huntington Park, an ADU under 750 square feet of interior livable space and a JADU under 500 square feet are not subject to impact fees. Larger ADUs pay a share of each fee in proportion to the ADU's square footage against the primary dwelling's, while primary dwellings pay the full amount.

4. Impact Fees. a. ADUs less than 750 square feet of interior livable space, or JADUs less than 500 square feet of interior livable space are not subject to impact fees. b. Impact fees for ADUs 750 square feet of interior livable space or larger shall be charged proportionately in relation to the square footage of the ADU to the square footage of the primary dwelling unit. Formula: (Square Footage of ADU/Square Footage of Primary Dwelling Unit) x Amount of Fee. c. Primary dwellings are subject to the full amount of all applicable impact fees.

Full Breakdown

Section 9-3.2650, item 4, of the Huntington Park Municipal Code sets the impact fee treatment of accessory dwelling units, as part of Article 26 adopted by Ordinance 2025-13 and effective January 23, 2026. The exemption has two thresholds: ADUs less than 750 square feet of interior livable space, and JADUs less than 500 square feet of interior livable space, are not subject to impact fees. An ADU that is 750 square feet of interior livable space or larger is charged proportionately, using the printed formula of the square footage of the ADU divided by the square footage of the primary dwelling unit, multiplied by the Amount of Fee.

The article prints no dollar figures, so the fee amount itself comes from whatever impact fee applies to the primary dwelling. Primary dwellings are subject to the full amount of all applicable impact fees, and the ADU relief never reduces the primary dwelling's charge. Utility charges are handled in item 9 of the same section. If a detached ADU is constructed with a new single-family home, a separate utility connection directly between the ADU and the utility is required, with payment of the normal connection fee and capacity charge for a new dwelling.

Converted ADUs on a single-family lot are not required to have a new or separate utility connection, and no connection fee or capacity charge is required. ADUs can otherwise share utility services and meters with the primary dwelling. The permit itself is a minor development permit under § 9-3.2630, processed as a ministerial action. Because § 9-3.2620 sends any standard not enumerated in the article to the California Government Code, a fee question that Article 26 does not answer is resolved under State law.

Violations & Fines

Article 26 prints no penalty for fee issues. A person who willfully violates the Code or a permit issued under it is liable under § 9-2.2407(1)(D) for a civil penalty in compliance with the City's Schedule of Fees for each day the violation continues, and also owes the City its costs and damages. Administrative decisions can be appealed in writing to the Council through the City Clerk (§ 1-4.01).

Frequently Asked Questions

Does a small ADU in Huntington Park pay impact fees?
No. Section 9-3.2650(4)(a) provides that ADUs less than 750 square feet of interior livable space, and JADUs less than 500 square feet of interior livable space, are not subject to impact fees. The exemption turns on interior livable space, which is the measurement the code uses throughout Article 26.
How is the fee calculated for a larger ADU?
For an ADU of 750 square feet of interior livable space or larger, the fee is charged proportionately. The code prints the formula as the square footage of the ADU divided by the square footage of the primary dwelling unit, times the Amount of Fee. The article does not print a dollar amount of its own.
Does the main house get a discount when an ADU is added?
No. Section 9-3.2650(4)(c) states that primary dwellings are subject to the full amount of all applicable impact fees. The exemption and the proportional charge apply only to the ADU or JADU, not to the primary dwelling.
Do utility connection charges apply to an ADU?
It depends on the build type under § 9-3.2650(9). A detached ADU built with a new single-family home needs a separate utility connection and the normal connection fee and capacity charge for a new dwelling. A converted ADU on a single-family lot is not required to have a separate connection, and no connection fee or capacity charge is required.

Sources & Official References

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