Shed Rules: Hesperia vs Ontario
How do shed rules rules compare between Hesperia, CA and Ontario, CA?
Ontario has fewer restrictions than Hesperia.
Hesperia, CA
San Bernardino County
Hesperia Municipal Code §16.20.390 caps total enclosed accessory buildings (sheds, workshops) at 1,000 sq ft plus 7.5% of net lot area in residential zones. Sheds count as 'accessory buildings' under §16.08.005 when at least 50% enclosed. Building permits are required for sheds over 120 sq ft per the California Building Code.
View full Hesperia rules →Ontario, CA
San Bernardino County
Ontario follows CRC Section R105.2, exempting one-story detached sheds under 120 sq ft from a building permit. Sheds must still meet zoning setbacks, height limits, and trade permits for electrical.
View full Ontario rules →Key Facts Comparison
| Fact | Hesperia | Ontario |
|---|---|---|
| Permit Threshold | Over 120 sq ft (CBC); zoning rules apply at any size | - |
| Max Aggregate Area | 1,000 sq ft + 7.5% of net lot area (§16.20.390) | - |
| Max Height | 35 ft / 2.5 stories; 20 ft within 30 ft of side/rear (§16.20.410) | - |
| Metal Sheds | A, RR, R1-18,000 zones only; rear-yard placement (§16.20.420) | - |
| Code Authority | Hesperia MC §§16.08.005, 16.20.390, 16.20.410, 16.20.420 | - |
| Permit trigger | - | Over 120 square feet |
| State code | - | CRC R105.2 exemption |
| Setbacks | - | Typically 3-5 ft rear/side |
| Electrical/plumbing | - | Trade permit required |
| Coverage | - | Rear-yard cap, often 30 percent |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Do I need a permit for a shed in Hesperia?
California Building Code exempts utility sheds 120 sq ft or smaller from a building permit, but Hesperia zoning setbacks, height limits, and aggregate area caps under §16.20.390 still apply. Anything over 120 sq ft needs a building permit from the Building & Safety Division.
Can I put a metal shed in my backyard in Hesperia?
Only if your property is in the A (Agricultural), RR (Rural Residential), or R1-18,000 zone district. Even then, metal accessory buildings must be placed between the rear of the primary residence and the rear property line (§16.20.420).
Ontario FAQ
Can I put a 10 by 12 shed in my Ontario backyard without a permit?
A 10 by 12 shed is exactly 120 square feet, which is at the exemption line. Going one foot larger triggers a permit. Keep it at or under 120 square feet and follow setbacks to avoid the permit.
Does a shed with a light fixture need a permit?
Yes. Even a permit-exempt shed requires a separate electrical permit for any wiring beyond a standard cord drop.
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