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Montclair · Building on your lot

Sheds, garages and other accessory structures in Montclair

On R-1 lots, accessory structures are limited to 1 story or 15 feet and 200 to 1,400 total square feet, depending on lot size.

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Key points

  • Accessory structures: On R-1 lots, accessory structures are limited to 1 story or 15 feet and 200 to 1,400 total square feet, depending on lot size.

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

What Montclair's code says

Montclair code What Montclair's code adds
Maximum height
  • No more than 1 story or 15 feet.
    Applies: Accessory structures on R-1 single-family lots of any size; RV garages follow other rules.
    § 11.19.050 · code text
    Less than 6,000 square feet | 200 square feet | 1 | 1 story or 15 feet
Size or lot coverage
  • No more than 200 square feet in total.
    Applies: R-1 lots under 6,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    Less than 6,000 square feet | 200 square feet | 1 | 1 story or 15 feet
  • No more than 400 square feet in total.
    Applies: R-1 lots of 6,001 to 9,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    6,001—9,000 square feet | 400 square feet | 2 | 1 story or 15 feet
  • No more than 600 square feet in total.
    Applies: R-1 lots of 9,001 to 12,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    9,001—12,000 square feet | 600 square feet | 2 | 1 story or 15 feet
  • No more than 800 square feet in total.
    Applies: R-1 lots of 12,001 to 15,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    12,001—15,000 square feet | 800 square feet | 2 | 1 story or 15 feet
  • No more than 1,000 square feet in total.
    Applies: R-1 lots of 15,001 to 18,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    15,001—18,000 square feet | 1,000 square feet | 2 | 1 story or 15 feet
  • No more than 1,200 square feet in total.
    Applies: R-1 lots of 18,001 to 20,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    18,001—20,000 square feet | 1,200 square feet | 2 | 1 story or 15 feet
  • No more than 1,400 square feet in total.
    Applies: R-1 lots over 20,000 square feet; all detached accessory structures combined, including approved second units.
    § 11.19.050 · code text
    Over 20,000 square feet | 1,400 square feet | 2 | 1 story or 15 feet

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

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

On R-1 lots, accessory structures are limited to 1 story or 15 feet and 200 to 1,400 total square feet, depending on lot size.

General information, not legal advice.

Ask about a specific Montclair property

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

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Montclair Municipal Code — full text