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.
Table 22.306.070-B of the Altadena CSD sets max structure height at 35 ft for lots ≥20,000 sq ft, 30 ft for lots <20,000 sq ft, and 30 ft for flag lots. Section 22.306.070.A.2.c caps the number of stories above grade at 2 — a 'basement' (per 22.14.020) counts as a story but a 'cellar' (per 22.14.030) does not. Section 22.306.070.A.1.c further caps any portion of any structure within 15 ft of a property line at 23 ft. Height is measured from previously existing grade if fill has been placed.
Excess height requires demolition or Variance (Ch. 22.194). Stop-work orders if discovered during construction.
Altadena, CA
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Altadena, CA
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Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle structure height limits.
See how Altadena's structure height limits rules stack up against other locations.
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