Land Use - Licensed Building Contractors 

Licensed Contractors Serving Boulder County

The Land Use Department licenses contractors performing work in unincorporated Boulder County. A contractor is anyone who engages in any type of work for compensation for which a building permit is required or who directs or supervises such work.

The Following Are Not Considered to be Contractors:

  • The property owner
  • A laborer working under the supervision of a contractor
  • A person who is performing labor or repair work on their own property
  • An employee of the property owner who performs full-time maintenance or repair work on the property owners property
  • State-licensed plumbers or electricians

Boulder County Licensed Contractors by Type

  • Class A Commercial or residential construction
  • Class B Residential work; Commercial remodeling or tenant finish
  • Class C One and two-family residential
  • Commercial Mechanical Commercial mechanical installations and repair
  • Residential Mechanical Residential mechanical installations and repair
  • Roofing New roofing; Re-roofing
  • Class M Includes but not be limited to: deconstruction, masonry, grading and excavations, repair and installation of signs, solar photo-voltaic equipment installation and repair, residential elevator repair and installation, window replacements, re-siding, installation of listed wood-burning appliances, 1-story pre-engineered agricultural buildings that do not contain habitable space, electrical, HVAC, or plumbing.

Boulder County does not have jurisdiction over contactor licensing in cities and towns in Boulder County. See Municipality Contacts Within Boulder County for information on contactor licensing in cities and towns.


Land Use Building Safety and Inspection Services

Email: Ask a Building Official
Main: 303-441-3926
Fax: 303-441-4856

Courthouse Annex Building

2045 13th Street
Boulder, CO 80302
8 a.m. - 4:30 p.m. M, W, TH, F
10 a.m. - 4:30 p.m. Tuesday
Plan review services for building permits are not available on Tuesdays.
Building permits can be applied for and issued until 4 p.m.
Map & Directions

Mailing Address

PO Box 471
Boulder, CO 80306