Setback Rules: Santa Monica vs Topanga
How do setback rules rules compare between Santa Monica, CA and Topanga, CA?
Santa Monica and Topanga have similar restriction levels.
Santa Monica, CA
Los Angeles County
Santa Monica R1 district requires a minimum 20 ft front setback (or per Official Districting Map). Side setbacks for multi-unit (R2-R4) adjoining R1 are 10 ft interior and 20 ft rear. Accessory buildings may extend to 5 ft from rear property line.
View full Santa Monica rules →Topanga, CA
Los Angeles County
Setback requirements in unincorporated LA County are established under Title 22, Section 22.110. Typical R-1 zone: 20 ft front, 5 ft side, 15 ft rear. The Director of Public Works may grant setback modifications without hearing. ADUs require 4 ft side/rear setbacks per state law.
View full Topanga rules →Key Facts Comparison
| Fact | Santa Monica | Topanga |
|---|---|---|
| R1 Front | 20 ft minimum or per map | - |
| R2-R4 to R1 | 10 ft side, 20 ft rear | - |
| Accessory Rear | 5 ft minimum | - |
| Code | SMMC Ch. 9.07, Ch. 9.21 | - |
| R-1 Front | - | Typically 20 ft |
| R-1 Side | - | Typically 5 ft |
| R-1 Rear | - | Typically 15 ft |
| ADU | - | 4 ft side/rear per state law |
Highlighted rows indicate differences between cities.
Santa Monica FAQ
How do I find my setback requirements?
Check Santa Monica zoning map for your parcel’s zoning district, then consult the zoning code for that district’s setbacks.
Can I build closer than the setback?
Only with a variance approved by the zoning board or if your structure qualifies for an exception.
Topanga FAQ
What are the standard residential setbacks in LA County?
In R-1 zones, typical setbacks are 20-25 feet front, 5 feet side, and 15-25 feet rear. Exact requirements vary by zone. Check Title 22 or contact the Department of Regional Planning at (213) 974-6411 for your specific zone.
Can I build closer than the setback?
Only with a variance approved by the Regional Planning Commission, which requires a public hearing. ADUs have reduced 4-foot side and rear setbacks under state law. Eaves and similar projections may extend up to 2.5 feet into setbacks.
How do I find my property's setback requirements?
Look up your zoning designation on the LA County GIS portal (planning.lacounty.gov) and check Title 22 for the setback standards. Or call the Department of Regional Planning at (213) 974-6411 for assistance.
Compare other topics
See how Santa Monica 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