Accessory Dwelling Units (ADUs) - City of Longmont

Accessory Dwelling Units (ADUs)

ADU, Cottage, Granny Unit, carriage house

Departments » Departments N-Z » Planning and Development Services » Development Process

 

On June 3, 2025, the City of Longmont adopted new regulations regarding Accessory Dwelling Units (ADUs) in order to comply with the State of Colorado Legislation HB24-11. For information regarding the new regulations and for guidance on permitting and the overall process, please see the City’s ADU Guide.

 

The City’s ADU regulations can also be found in Title 15, Chapter 15.02.080.E of the Longmont Municipal Code.

For specific information on HB24-11 please visit: https://dlg.colorado.gov/accessory-dwelling-units.

For questions, contact us at (303) 651-8330 or longmont.planning@longmontcolorado.gov

 

 

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