Development and Design Standards - City of Longmont

Development and Design Standards

“Development” means any man-made change to improved or unimproved real estate, including but not limited to the alteration, construction, reconstruction, conversion, or enlargement of any structure; any change in use of a property, building, or structure; and any mining, dredging, filling, grading, paving excavation or drilling operation. The term “development” shall include the act of subdivision, unless otherwise expressly excluded.

 

The City of Longmont oversees preparation of plan sets and construction of the public improvements associated with new residential and commercial developments.

 

Public Works; Parks, Recreation and Open Space; Planning; Water/Wastewater; Longmont Power and Communications; and Public Safety departments work together to ensure that the public improvements are designed and installed according to the City of Longmont Design Standards and Construction Specifications, answer questions about the development process in Longmont, and work with developers and contractors to resolve problems that may arise during design and construction.

 

Public Works is responsible for coordinating the Public Improvement Agreements (PIA) and monitoring construction and final acceptance, processing securities and payments, and scheduling inspections.

 

View information regarding development permits – the City issues several different types of permits that are required before construction activity may begin.

 

For water and sewer tap information (New Development/Outside the building) please call 303-651-8304.

 

For water and sewer tap information (Inside the building) please call 303-651-8332.

 

Construction/Final Acceptance Process – For more detailed information on the Construction Acceptance Process, please call 303-651-8304.

 

Design Standards

 

The City of Longmont Design Standards and Construction Specifications, originally adopted in 1993, includes the design criteria and construction standards for public streets, storm drainage systems, water systems, sanitary sewer systems, arterial landscaping and greenways, electric, and Urban Neighborhood Design.

 

The 2007 update was approved by City Council and effective as of July 1, 2007.

 

The City Council approved the following updates in 2025 –

  • Urban Neighborhood Design Section 800
  • General Requirements Section 100
  • Longmont Power and Communication (LPC) Section 700
  • Appendix

 

For additional information, please refer to the City of Longmont Land Development Code and/or the City’s Municipal Code.

 

DESIGN STANDARDS AND CONSTRUCTION SPECIFICATIONS

 

Download The Whole Set of Files

 

Download Individual Sections

 

GENERAL REQUIREMENTS:

 

STREET SECTION:

 

STORM DRAINAGE SECTION:

 

WASTEWATER SECTION:

 

WATER SECTION:

 

PARKS SECTION:

 

LONGMONT POWER & COMMUNICATION SECTION:

 

URBAN NEIGHBORHOOD DESIGN SECTION:

 

APPENDIX:

 

APPROVED MATERIALS LISTS:

Beware: Fraudulent email impersonates the City of Longmont Planning Department

UPDATE: Notice of Building Department Temporary Counter Closure

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