Starting November 16, 2023! A service charge will be added for payments made by debit/credit card. The service fee, paid directly to the card processor, will be 3.15%. Please note this charge is for payments by debit/credit cards only and will show up as a separate transaction on your statement. Alternative payment types: ACH (echeck - which can be paid through the portal) and checks will continue to be accepted without additional service fees.
Thornton issues a variety of building, development, and infrastructure permits. Please ensure that you select the proper type of permit prior to completing your application. Contact us if you have any questions.
If you have any questions please call Building Inspections at 303-538-7250, or email buildings@thorntonco.gov. Additional information is available at the Contractor License page.
A building permit is required anytime a homeowner or contractor erects, constructs, enlarges, remodels, alters, repairs, moves, improves, removes, converts, demolishes, or changes the type of occupancy of any building, structure or utility.
If you have any questions please call the Building Inspection Division at 303-538-7250, or email buildings@thorntonco.gov. Additional information is available at the Building Inspection Division page.
The City of Thornton requires licensing for all contractors involved in the construction, alteration, remodeling, repairing and equipping of buildings and structures; installation of underground utilities; construction of roads and streets and construction of all City-owned water, sewer, and storm drainage facilities. Homeowners doing work on their personal private residence are not considered contractors and are not required to obtain a contractor license.
If you have any questions please call the Infrastructure Engineering office at 720-977-6210, or email infrastructure.permits@thorntonco.gov. Additional information is available at the Infrastructure Engineering Page.
City of Thornton capital improvement project work.
Work being ordered for XCEL, Comcast, United Power.
Right-of-way permits for special events, block parties, on-street containers, and right-of-way work such as boring, potholing, approved small cell installations, volunteer work, utilities and curb cuts.
Sewer service and water service repairs extending from the yard to the right-of-way within City limits, or in-yard only when outside City limits. Repairs being done in-yard onlly within City limits must obtain permit from Buildings Division.
If you have any additional questions please visit our frequently asked questions sheet below.
Use the link below when directed to make a general fee for City Development. If you have any questions regarding making a general payment, please email us at CityDevelopment@ThorntonCO.gov or call at 303-538-7295.
If you have any questions please call the City Development office at 303-538-7295, or email permits@thorntonco.gov. Additional information is available at the Development Engineering page.
Permits for new development, redevelopment work.
If you have any questions, please call the City Development office at 303-538-7295, or email HydrantMeterRental@ThorntonCO.gov. Please follow the instructions in the handout below when submitting the application. Please be aware that you must have an active Contractor’s license to rent a meter. For contracting information or to apply use the link here.
The City of Thornton requires a $1400.00 deposit in the form of a Check, ACH, or Wire Transfer for each Hydrant Meter Rental. To request a meter, please review the handout below and complete the attached application. If you currently have a meter and would like to request a renewal, please contact us by email and staff will let you know if you are eligible and send you the necessary form to renew (Limit two renewals per Meter, may be subject to additional approval).
If you have any questions please call the City Development office at 303-538-7295, or email developmentsubmittals@thorntonco.gov. Please follow the Development Submittal Instructions when submitting a Floodplain Development Permit application.
The City of Thornton requires a Floodplain Development Permit (FDP) to evaluate any and all impacts of activities proposed in the City's floodplains.