Northglenn ADU Zoning Rules & Permit Guide

ADU Regulations in Northglenn, Colorado

Updated September 29, 2026

In Adams County north of Denver, Northglenn regulates ADUs under local ordinance. Colorado has no statewide ADU mandate, so property owners must follow the city's specific zoning requirements.

Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Northglenn as of 2026. Regulations are governed by local zoning ordinances, as Colorado has no statewide ADU mandate (HB 24-1152 addresses transit density).

Additional Local Requirements for Northglenn

• Minimum lot size may apply
• Minimum 200 sq ft
• Owner occupancy may be required
• ⚠️ CO has NO statewide ADU mandate — verify with city

Frequently Asked Questions About ADUs in Northglenn

Can I build an ADU in Northglenn?

This Colorado city regulates ADUs through local ordinance. Confirm the minimum lot size and owner occupancy rules with the planning department.

What is the maximum ADU size allowed in Northglenn?

ADUs in Northglenn can be up to 1,000 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Northglenn planning department before designing your project.

What are the setback requirements for an ADU in Northglenn?

ADUs in Northglenn generally require setbacks of 5 ft rear, 5 ft side. Colorado has no statewide ADU mandate, so the exact setback figures come from Northglenn's own zoning code — confirm them with the city planning department before you design.