ADU Impact Fees: Altadena vs South Gate
How do adu impact fees rules compare between Altadena, CA and South Gate, CA?
Altadena, CA
Los Angeles County
No data available yet for Altadena.
South Gate, CA
Los Angeles County
South Gate cannot charge any impact fees on ADUs under 750 sq ft, per Gov. Code §65852.2(f)(3)(A). ADUs 750 sq ft and larger may be charged impact fees only proportional to the primary dwelling's square footage. Standard building permit and plan check fees still apply.
View full South Gate rules →Key Facts Comparison
| Fact | Altadena | South Gate |
|---|---|---|
| ADUs under 750 sq ft | - | NO impact fees allowed (Cal. Gov. Code §65852.2(f)(3)(A)) |
| ADUs 750+ sq ft | - | Impact fees proportional to main dwelling size |
| School fees | - | Only on ADUs 500+ sq ft (Cal. Ed. Code §17620) |
| Utility connection | - | Not required for ADUs converted from existing structures |
| Standard permit fees | - | Building/plan check fees still apply (based on construction cost) |
Highlighted rows indicate differences between cities.
Altadena FAQ
No FAQs available.
South Gate FAQ
Will South Gate charge me impact fees for a small ADU?
No. State law (Cal. Gov. Code §65852.2(f)(3)(A)) prohibits any impact fees on ADUs under 750 sq ft. Standard building permit and plan check fees still apply.
Do I need a new water/sewer connection?
Not for ADUs converted from existing space (garage, basement, attached structure). New detached ADUs may require connection fees proportional to size.
What if South Gate charges me an illegal ADU fee?
File a complaint with the California HCD ADU enforcement unit and dispute the fee through South Gate's permit appeal process under SGMC Title 11.
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