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Accessory Buildings -- Applying for Permits

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Please refer to PERMITS for an overview of the permit process.



Please submit the following to apply for a Building Permit to construct an Accessory Building:

  • Provide 2 Plot Plans showing dimensions of your project or addition and its relationship to existing buildings or structures on the property. Show all easements and the distance to existing property lines drawn to scale. Click to see an example of a plot plan.
  • Fill out a Building Permit Application.
    The majority of permit applications are processed with little delay. The submitted documents will help determine if the project is in compliance with building safety codes, zoning ordinances and other applicable laws.
    The Permit Application form and this information are available:
    • At the Building Inspection front counter located in the Development Services Center, 385 Kimbark St.
    • By calling Building Inspection at (303) 651-8332
    • Email your request to
    • Download at the bottom of this page

Please Note:

  • NOISE. Section 10.20.100 of the Longmont Municipal Code prohibits making unreasonable noise which would cause a person of ordinary sensitivities significant annoyance and irritation.
  • CONSTRUCTION DEBRIS & TRASH. Section 9.04.100 of the Longmont Municipal Code requires debris and trash be contained on the job site.
  • BEFORE DIGGING. ALWAYS call the Utility Information Center.
  • SMOKE ALARMS.  Smoke alarms are required to be hardwired and interconnected in new and existing bedrooms, halls and one each level unless removal of interior wall or ceiling finishes would be required. In this case, battery operated devices are acceptable.


In English:
Accessory Building (PDF)
Accessory Building Application (goes to Permit Application page)

En Espanol:
Edificios Adjuntos Residential (PDF)


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