Structure Height Limits: Fremont vs Hayward
How do structure height limits rules compare between Fremont, CA and Hayward, CA?
Hayward has fewer restrictions than Fremont.
Fremont, CA
Alameda County
Fremont limits single-family homes to 30 feet or 2 stories in most R-1 zones, with hillside overlay districts imposing stricter limits to protect ridgelines.
View full Fremont rules →Hayward, CA
Alameda County
Hayward limits single-family residential structures to 30 feet and 2 stories in most RS zones. Downtown and mixed-use districts permit taller buildings per the Hayward Downtown Specific Plan.
View full Hayward rules →Key Facts Comparison
| Fact | Fremont | Hayward |
|---|---|---|
| R-1 Height | 30 feet / 2 stories | - |
| Accessory | 15 feet | 15 ft typical |
| ADU Height | 25 feet (state law) | - |
| Hillside | Stricter overlay limits | - |
| Contact | (510) 494-4455 | - |
| RS max | - | 30 ft and 2 stories |
| ADU | - | 16 ft baseline state law |
| Downtown | - | Up to 105 ft+ |
| Airport zone | - | FAA Part 77 limits |
Highlighted rows indicate differences between cities.
Fremont FAQ
Can I build a three-story home?
Not in standard R-1 zones; multi-family or specific plan areas may allow 3 stories with design review.
Do hillside rules apply to my lot?
Check the Fremont Hillside Combining District map; lots in the overlay have ridgeline and height protections.
Hayward FAQ
How tall can I build my ADU?
State law baseline is 16 feet, with 18-25 feet allowed near transit or for two-story additions per AB 2221 and SB 897.
Do rooftop HVAC units count toward height?
Mechanical equipment can exceed the limit if properly screened and in line with specific zoning exceptions.
Compare other topics
See how Fremont and Hayward compare on other ordinance categories.
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