Building Setbacks & Zoning in Altadena, CA (2026)
3 verified building setbacks & zoning rules for Altadena, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
Altadena R-1 setbacks: front = smallest existing front yard on the same block (min 20 ft); rear = 35 ft (lots ≥20,000 sf) or 25 ft (lots <20,000 sf); side = 10% of avg lot width, min 5 ft interior / 10 ft reverse corner.
Altadena Setback Rules (CSD 22.306.070.A.1)
Some RestrictionsStructure Height Limits
Altadena R-1 max height: 35 ft on lots ≥20,000 sf; 30 ft on lots <20,000 sf and flag lots. Maximum 2 stories above grade. No portion of any structure may exceed 23 ft if within 15 ft of any property line.
Altadena Height Limits (CSD 22.306.070.A.2)
Some RestrictionsLot Coverage Limits
Altadena R-1 max Gross Structural Area (GSA) and lot coverage = (0.25 × net lot area) + 1,000 sq ft, never exceeding 9,000 sq ft total (Altadena CSD 22.306.070.A.4).
Altadena Lot Coverage (CSD 22.306.070.A.4)
Some RestrictionsLooking for Los Angeles County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Altadena city rules.
Building Setbacks & Zoning in Los Angeles County →