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Irwindale · Building on your lot

Sheds, garages and other accessory structures in Irwindale

In Irwindale's R-3 zone, accessory buildings must be 10 ft from dwellings, or 5 ft if built fully of 1-hour fire-resistive construction.

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Key points

  • Accessory buildings: In Irwindale's R-3 zone, accessory buildings must be 10 ft from dwellings, or 5 ft if built fully of 1-hour fire-resistive construction.

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

What Irwindale's code says

Irwindale code What Irwindale's code adds
Side and rear setback
  • At least 5 feet from the rear lot line.
    Applies: R-3 zone: non-dwelling accessory buildings on interior lots that back onto an alley.
    § 17.24.070 · code text
    If the lot rears upon an alley, such accessory building shall maintain a distance of not less than five feet from the rear lot line.
  • At least 5 feet from the rear property line.
    Applies: R-3 zone: non-dwelling accessory buildings on corner lots that back onto an alley.
    § 17.24.070 · code text
    On the side street side, such buildings shall observe the same side yard requirements as main buildings.
  • At least 5 feet from the rear property line.
    Applies: R-3 zone: non-dwelling accessory buildings on reverse-corner lots.
    § 17.24.070 · code text
    Such buildings shall not be less than five feet from the rear property line, and shall observe the same side yard requirements as main buildings, on the side street side.
Distance from the house
  • At least 10 feet between homes and accessory buildings.
    Applies: R-3 zone.
    § 17.24.070 · code text
    The distance between buildings used for human habitation and accessory buildings shall be not less than ten feet;
  • At least 5 feet between homes and accessory buildings.
    Applies: R-3 zone: accessory buildings of 1-hour fire-resistive construction throughout, with a 5-foot-wide open yard between the buildings.
    § 17.24.070 · code text
    the distance between buildings used for human habitation and accessory buildings may be not less than five feet when such accessory buildings are of one-hour, fire-resistive construction throughout, as defined and specified in the building code.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

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

In Irwindale's R-3 zone, accessory buildings must be 10 ft from dwellings, or 5 ft if built fully of 1-hour fire-resistive construction.

General information, not legal advice.

Ask about a specific Irwindale property

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

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Irwindale Municipal Code — full text