Shed Rules: Altadena vs Carson
How do shed rules rules compare between Altadena, CA and Carson, CA?
Altadena has fewer restrictions than Carson.
Altadena, CA
Los Angeles County
Sheds 120 sq ft or smaller and ≤12 ft tall typically don't need a building permit in Altadena, but they still must comply with Altadena CSD setbacks. Anything larger needs a permit.
View full Altadena rules →Carson, CA
Los Angeles County
Sheds and other detached accessory structures in Carson are regulated under the Zoning Code (Carson Municipal Code Article IX, Chapter 1) with permit thresholds set by the California Building Code (Title 24 CCR) adopted in CMC Building Code chapter.
View full Carson rules →Key Facts Comparison
| Fact | Altadena | Carson |
|---|---|---|
| No-Permit Threshold | ≤120 sq ft | - |
| Authority | LA County Title 26 + CBC §105.2 | - |
| Min Setbacks (R-1) | 5 ft side, 5 ft rear | - |
| Lot Coverage | 0.25 × lot + 1,000 sf (CSD 22.306.070.A.4) | - |
| Permit-exempt size | - | One-story sheds ≤120 sq ft (CRC §R105.2 as adopted) |
| Code portal | - | ecode360.com/CA4377 (current through Jan 6, 2026) |
| Zoning chapter | - | CMC Article IX, Ch. 1 (Zoning) |
| Building code | - | CMC Building Code adopts Title 24 CCR (2022 CBSC) |
| Building & Safety | - | 701 E Carson St; (310) 830-7600 |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need a permit for a shed in Altadena?
Not if it is 120 sq ft or smaller and has no electrical/plumbing. Larger sheds require a building permit from LA County Building & Safety.
Carson FAQ
Do I need a permit for a small backyard shed in Carson?
A one-story detached storage shed of 120 sq ft or less is exempt from a building permit under the California Residential Code §R105.2 (adopted by Carson). However, you still must comply with Carson Zoning Code setbacks and lot-coverage limits in CMC Article IX, Ch. 1.
Where is Carson's current municipal code?
The current Carson Municipal Code is hosted on eCode360 at ecode360.com/CA4377, current through January 6, 2026. The zoning chapter (Article IX, Ch. 1) covers accessory structures.
Compare other topics
See how Altadena and Carson 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