Development Construction Permits Applications (New Development and Re-Development Projects)
How to apply for a Development Engineering ROW or Development Traffic Control Permit prior to November 3, 2025
- Development Construction Permit Application - Construction permit for new or re-development of a property. Please use this permit for parking lot repairs. (Not for Franchise company use - United Power, Xcel, Comcast and etcetera).
- Development Traffic Control Permit Application - Required for all Right-of-Way Closures including Franchise permits (not required for parking lot repairs or private roadways).
- Franchise Development Permit Application - Required for all Franchise Companies (United Power, Xcel, Comcast and etcetera) doing work in or out of the Right-of-Way (ROW). Please apply for both this permit and an Development Traffic Permit if you are closing a ROW.
- Inspections: Development Engineering Inspectors are assigned to a project for its duration. Inspections are scheduled through the inspector.
- Construction and Traffic Permit Handout [PDF/435KB]
- Development Permit Applications
IMPORTANT: If you are needing a permit for work that is for a Capital Improvement Project (“CIP”) for the City of Thornton, work in the City that is not related to a new development site or redevelopment site or non-construction related items, please use the instructions on the city’s Infrastructures ROW Website to apply as this process update is for active Development Projects Permits ONLY.
How to apply for a Development Engineering ROW Permit or Development Traffic Control Permit starting November 3, 2025:
- Please go to the CityView Portal and create an account or log in using your existing account.
- Once logged in, click on the “Apply for a Planning Permit” link under Planning Department.
- Once there, it will prompt you to provide some details for your project. Please use the appropriate handouts below for detailed instructions on how to apply.
- Right-of-Way (ROW) Permit Development Engineering Handout [PDF/643KB](New Process) - Required for all Right-of-Way Closures including Franchise permits (not required for parking lot repairs or private roadways).
- Development Engineering Traffic Control Permit Handout [PDF/1MB] (New Process) – Required for all Right-of-Way Closures including Franchise permits (not required for parking lot repairs or private roadways).
- Construction Permits and Additional Construction Permits (Process didn’t change) – Construction permit for new or re-development of a property and for parking lot repairs. (Not for Franchise company use - United Power, Xcel, Comcast and etcetera).
IMPORTANT: If you are needing a permit for work that is for a Capital Improvement Project (“CIP”) for the City of Thornton, work in the City that is not related to a new development site or redevelopment site or non-construction related items, please use the instructions on the city’s Infrastructures ROW Website to apply as this process update is for active Development Projects Permits ONLY.