Structure Height Limits: Altadena vs Pasadena
How do structure height limits rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena have similar restriction levels.
Altadena, CA
Los Angeles County
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.
View full Altadena rules →Pasadena, CA
Los Angeles County
Building heights in Pasadena are regulated by zoning district per PMC 17.40.060. Detached ADUs limited to 12 ft top plate and 17 ft ridgeline. Hillside overlay areas have additional height restrictions to minimize visual impact. Height limit overlay zones may apply.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Code Section | Altadena CSD 22.306.070.A.2 | PMC 17.40.060 |
| Max Height ≥20k sf | 35 ft | - |
| Max Height <20k sf | 30 ft | - |
| Flag Lots | 30 ft | - |
| Max Stories | 2 above grade | - |
| Within 15 ft of PL | 23 ft | - |
| Standards | - | Vary by zoning district |
| Detached ADU | - | 12 ft plate, 17 ft ridge |
| Hillside | - | Additional restrictions apply |
Highlighted rows indicate differences between cities.
Altadena FAQ
How tall can a house be in Altadena?
35 ft on lots 20,000 sq ft and larger, 30 ft on smaller lots, with a maximum of 2 stories above grade (Altadena CSD 22.306.070.A.2).
Pasadena FAQ
What is the max height for a house?
Typically 35 feet or 2.5 stories in residential zones. Check Pasadena zoning code for your specific district.
Do chimneys count toward height?
Chimneys and similar projections are usually exempt up to a limited additional height above the roof.
Compare other topics
See how Altadena and Pasadena 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