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Building Additions and Accessory Structures

Permits are required for any structure (attached or detached) being constructed on a property. Below are some examples of projects that require a permit, this is not an all inclusive list.

  • Sheds (200 sq ft or larger)
  • Decks
  • Garages
  • Retaining wall (over 4 ft tall)
  • Patio Covers, Pergolas and awnings
  • Additions
  • Carport
  • Pool
  • Hot Tub

Before You Apply

If you are the homeowner and you occupy the structure, you may apply for the permit. If you are hiring a City of Arvada licensed contractor to complete the work, please have them apply for the permit.

Required Documents

  1. Site Plan with details of the distance from the structure to each property line. If you do not have a site plan, our existing online permit records may contain a site plan that you can use as a template, go to If there is no site plan you can get an ILC on your property by hiring a 3rd party company.
  2. Permit Application
  3. Two sets of Construction drawings (If structural)
  4. Engineering maybe required

Submit Application

You can mail or drop off your completed application Monday through Friday 8:00 a.m. to 5:00 p.m.

  • Mail: 8101 Ralston Rd Arvada, CO 80001

Required Plan Reviews 

Neighborhood Services needs to approve the placement of the structure
Building Inspections will review the construction plans for code compliance.


  • Review fee. $32.50 
  • Building permit fee. The building permit fee and Use Tax are based on the total value of construction.
  • Use tax. Use Tax is 58% of the job value multiplied by 3.46%.


Inspections can be scheduled until 6:00 a.m. of the desired inspection date. Inspections are completed Monday through Friday, 8:30 a.m. to 4:00 p.m. All inspection can be scheduled using or by calling 720-898-7630 and using the automated line. A 3-digit inspection code is required.

Closing the Permit

Once the final building inspection is completed, the permit will be closed. Please review the permit status and inspection results on