ADU Impact Fees: Carson vs Topanga
How do adu impact fees rules compare between Carson, CA and Topanga, CA?
Carson, CA
Los Angeles County
Carson 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 Carson rules →Topanga, CA
Los Angeles County
No data available yet for Topanga.
Key Facts Comparison
| Fact | Carson | Topanga |
|---|---|---|
| ADUs under 750 sq ft | NO impact fees allowed (state preemption) | - |
| ADUs 750+ sq ft | Impact fees proportional to main dwelling size | - |
| School fees | Only on ADUs 500+ sq ft (Ed. Code §17620) | - |
| Utility connection | Not required for ADUs in existing structures | - |
| Standard permit fees | Building/plan check fees still apply (based on construction cost) | - |
Highlighted rows indicate differences between cities.
Carson FAQ
Will Carson charge me impact fees for a small ADU?
No. State law prohibits any impact fees on ADUs under 750 sq ft. Standard building permit fees still apply.
Do I need a new water/sewer connection?
Not for ADUs converted from existing space (garage, basement, etc.). New detached ADUs may require connection fees proportional to size.
What if Carson charges me an illegal fee?
File a complaint with California HCD's ADU enforcement unit and dispute the fee through Carson's permit appeal process.
Topanga FAQ
No FAQs available.
Compare other topics
See how Carson and Topanga compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool