Skip to content

Rialto · Building on your lot

Sheds, garages and other accessory structures in Rialto

Accessory buildings may cover at most 25% of a rear yard; in single-family zones, all buildings together at most 30% of the lot.

Ask about sheds, garages and other accessory structures in Rialto See coverage

Key points

  • Yard coverage: Accessory buildings may cover at most 25% of a rear yard; in single-family zones, all buildings together at most 30% of the lot.

Each rule below links to the section of the Rialto Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Rialto's code says

Rialto code What Rialto's code adds
Size or lot coverage
  • No more than 25% of the rear yard.
    Applies: A detached accessory building, or all accessory buildings together.
    § 18.52.030 · code text
    A detached accessory building, or combination of accessory buildings may occupy not more than twenty-five percent of a rear yard as defined in Section 18.04.770, provided that the maximum building coverage in a single-family residential zone shall not exceed thirty percent of the total lot area.
  • No more than 30% of the total lot area.
    Applies: All buildings on the lot together in a single-family residential zone.
    § 18.52.030 · code text
    A detached accessory building, or combination of accessory buildings may occupy not more than twenty-five percent of a rear yard as defined in Section 18.04.770, provided that the maximum building coverage in a single-family residential zone shall not exceed thirty percent of the total lot area.
Side and rear setback
  • Can be as close as 5 feet to an interior property line.
    Applies: Interior property lines next to the rear yard area.
    § 18.52.030 · code text
    An accessory building may be located within five feet of any interior property line adjacent to the rear yard area.
Distance from the house
  • At least 10 feet from the house.
    Applies: Accessory buildings with more than 120 square feet of roof area.
    § 18.52.030 · code text
    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.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

How big can a shed or accessory building be in Rialto?

Accessory buildings may cover at most 25% of a rear yard; in single-family zones, all buildings together at most 30% of the lot.

General information, not legal advice.

Ask about a specific Rialto property

Ask GoCodebook how Rialto's sheds, garages and other accessory structures rules apply to your situation and get an answer that cites the section.

Ask your question

More on building on your lot in Rialto

All building on your lot rules in Rialto

Fences and walls in Rialto

Lot splits under SB 9 in Rialto

Solar panels and EV chargers in Rialto

Swimming pools in Rialto

Noise and construction hours in Rialto

Parking spaces required for homes in Rialto

Home alarm permits and false alarms in Rialto

Rialto Municipal Code — full text