Lot Coverage Limits: Fallbrook vs San Diego
How do lot coverage limits rules compare between Fallbrook, CA and San Diego, CA?
Fallbrook and San Diego have similar restriction levels.
Fallbrook, CA
San Diego County
Lot coverage limits in unincorporated San Diego County are set by the Zoning Ordinance. Coverage typically ranges from 25% to 60% depending on zone. ADUs up to 800 sq ft are exempt from lot coverage calculations per state law.
View full Fallbrook rules →San Diego, CA
San Diego County
Lot coverage limits in San Diego are established by zone in the development regulation tables of the Land Development Code (Tables 131-04C through 131-04G). Coverage varies by zone from approximately 50-60% for single-family zones to higher percentages for multi-family zones. ADUs of 800 sq ft or smaller are exempt from lot coverage calculations. Guest quarters and non-habitable accessory structures are permitted in addition to ADUs.
View full San Diego rules →Key Facts Comparison
| Fact | Fallbrook | San Diego |
|---|---|---|
| Rural Zones | 25–35% typical | - |
| Semi-Rural | 35–50% typical | - |
| Village Residential | Up to 60% | - |
| ADU Exempt | Up to 800 sq ft does not count | - |
| Includes | All roofed structures at foundation | - |
| Code Section | - | SDMC Ch. 13, Tables 131-04C-G |
| RS Zones | - | Typically 50-60% maximum coverage |
| ADU Exemption | - | Units 800 sq ft or less exempt from lot coverage |
| Accessory Structures | - | Permitted in addition to ADUs |
| Varies By Zone | - | Check specific zone development regulation table |
Highlighted rows indicate differences between cities.
Fallbrook FAQ
What is the lot coverage limit for my property?
It depends on your zoning designation. Rural zones typically allow 25-35%, semi-rural 35-50%, and village residential up to 60%. Contact County PDS for your specific zone's limit.
Does an ADU count toward lot coverage?
ADUs up to 800 sq ft are exempt from lot coverage calculations per state law. Larger ADUs may count toward the coverage limit.
Do pools count as lot coverage?
Swimming pools and uncovered decks typically do not count toward lot coverage. Only roofed structures measured at their foundation footprint are counted.
San Diego FAQ
What percentage of my lot can I build on?
Lot coverage limits vary by zone. Check Tables 131-04C through 131-04G in the Land Development Code for your zone's specific maximum. Most RS zones allow 50-60%.
Do ADUs count toward lot coverage?
ADUs of 800 square feet or smaller are exempt from lot coverage, FAR, and open-space calculations per state ADU law and San Diego's implementing ordinance.
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