ADU Rules: Burbank vs Castaic
How do adu rules rules compare between Burbank, CA and Castaic, CA?
Burbank has fewer restrictions than Castaic.
Burbank, CA
Los Angeles County
Burbank regulates ADUs and JADUs under Burbank Municipal Code (BMC) Title 10, Article 6, Division 3 (§§10-1-620.3 through 10-1-620.7), as updated by Ordinance 23-4,002 effective December 8, 2023 to align with California Government Code §65852.2. Detached ADUs are capped at 1,200 sq ft, attached ADUs at 50% of the primary dwelling or 1,200 sq ft with an 800 sq ft floor, and JADUs at 500 sq ft.
View full Burbank rules →Castaic, CA
Los Angeles County
Castaic is an unincorporated CDP in Los Angeles County governed by LA County Code Title 22 §22.140.640 (Accessory Dwelling Units and Junior Accessory Dwelling Units), most recently amended April 2024. Single-family lots may add one ADU plus one JADU; multifamily lots may add up to two detached new-construction ADUs plus conversion ADUs created in non-livable existing space.
View full Castaic rules →Key Facts Comparison
| Fact | Burbank | Castaic |
|---|---|---|
| Code Section | BMC §§10-1-620.3 to 10-1-620.7 (Ord. 23-4,002) | - |
| Max Detached ADU | 1,200 sq ft | - |
| Multifamily New Detached | Up to 2 per lot, 800 sq ft each | - |
| Multifamily Conversion | Up to 25% of existing units | - |
| Side/Rear Setback | 4 ft minimum | 4 ft (new construction) |
| Governing Code | - | LA County Code §22.140.640 |
| Single-Family | - | 1 ADU + 1 JADU per lot |
| Multifamily Detached | - | Up to 2 new (20 ft max) |
| WUI Fire Zone | - | Chapter 7A applies |
Highlighted rows indicate differences between cities.
Burbank FAQ
How many ADUs can I build on a Burbank multifamily lot?
Under BMC §10-1-620 and Gov Code §65852.2, multifamily lots may add up to two detached new-construction ADUs plus conversion ADUs within non-livable space, capped at 25% of the existing unit count (minimum one conversion ADU).
How tall can a Burbank detached ADU be?
Detached ADUs are limited to 16 feet, or 18 feet within a half-mile of a major transit stop or where the existing building is two or more stories, under BMC §10-1-620.3.
Do I need a public hearing for a Burbank ADU?
No. BMC §10-1-620.7 requires ministerial review consistent with state law — applications are decided based on objective standards without a hearing.
Castaic FAQ
Who regulates ADUs in Castaic?
Castaic is unincorporated, so LA County Regional Planning regulates ADUs under LA County Code Title 22 §22.140.640, not a separate city ordinance.
Are there fire-zone restrictions on Castaic ADUs?
Yes. Portions of Castaic are in LA County's Very High Fire Hazard Severity Zone, so ADUs must meet Chapter 7A wildland-urban interface ignition-resistant construction standards and LA County Fire Code §325 brush clearance.
Can a Castaic multifamily lot add detached ADUs?
Yes. Under LA County Code §22.140.640, multifamily lots may add up to two detached new-construction ADUs plus conversion ADUs within non-livable space (up to 25% of existing units).
Compare other topics
See how Burbank and Castaic 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