Knowledge Base

Many commercial and residential developments require a Development Permit.

A Specific Use Permit is required for specific uses within specific zone districts, and will be allowed on a case-by-case basis. A Development Permit is also required before a Certificate of Occupancy can be issued for any property requiring a Specific Use Permit as a new use. 

A Development Permit is not required when:

1. New construction is for:  1) buildings less than 480 square feet;  2) retaining walls under four feet in height; 3) swimming pools; 4) decks; 5) fences; 6) flagpoles; or 7) paving that does not change non-permeable coverage on a site by more than five percent.
2. Renovation of existing development:  1) will result in a change of use, but that does not require changes to exterior elevations or the existing site; 2) will not increase building height; 3) will not increase floor area; 4) or will not change non-permeable coverage on a site by more than 5%.

Development Permits are approved by the Development Permits and Appeals Board, after a public hearing, and are subject to appeal to the City Council.  A Development Permit is valid for three years from date of approval.  Please consult the City Development Department, at the Thornton City Hall, for submittal dates and any questions.  A meeting may be arranged by contacting the City Development Department at 303-538-7295. Applications can be obtained in the City Development Department located at Thornton City Hall.

For more information on Development Permits and Specific Use Permits, contact the City Development Department at (303) 538-7295.