Rialto, CA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Rialto, CA, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Rear yard coverage
- Max 25% of rear yard for detached accessory buildings
- Total lot coverage
- Max 30% of lot area in single-family zones
- Setback
- May be within 5 ft of interior property lines by the rear yard
- Separation
- 10 ft from main house if roof area exceeds 120 sq ft
- Living quarters
- Accessory buildings may not be used as living quarters
Summary
Rialto lists accessory buildings and gazebos among work requiring a building permit. Under Municipal Code Section 18.52.030, detached accessory buildings may occupy at most 25 percent of the rear yard and need 10 feet of separation from the house if over 120 square feet.
An accessory building may be located within five feet of any interior property line adjacent to the rear yard area. ... An accessory building having more than one hundred twenty square feet of roof area shall be separated from the main structure on the lot a minimum distance of ten feet.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 39).
Full Breakdown
Rialto Municipal Code Section 18.52.030 lets a detached accessory building, or combination of accessory buildings, occupy up to 25 percent of the rear yard, within the 30 percent total lot coverage cap for single-family zones (Section 18.10.030(I)). Accessory buildings may be located within five feet of any interior property line adjacent to the rear yard, and any accessory building over 120 square feet of roof area must be separated at least 10 feet from the main structure. Section 18.10.020(C) permits accessory structures such as garages, greenhouses, and workshops, but bars using any accessory building as living quarters. The city's building FAQ states a permit is needed for construction, repair, alteration, or removal of any structure.
Violations & Fines
Unpermitted accessory buildings are code violations; Rialto requires permits for accessory buildings, gazebos, patios, and masonry walls, and code enforcement can require after-the-fact permits or removal. Contact Building and Safety at (909) 820-2505.
Frequently Asked Questions
Do I need a permit to build a shed in Rialto?
How close to the property line can a shed be in Rialto?
Sources & Official References
Other rules in Rialto
How Rialto compares: Shed Permit Requirements by City·California rules heatmap·Compare Rialto to another location·View the California accessory structures overview
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