Address Services

Pitkin County is dedicated to maintaining the most correct address information for parcels and addressable structures. Incorrect physical addresses and improperly or unidentified structures not only result in delays by emergency services (fire, ambulance, law enforcement), they impede services provided by telephone, cable, gas, and electric providers, can add expense or delays in delivering packages, and may cause directional confusion for visitors to our community.

This page provides information and links for the public to help get you to the right place if you have questions or concerns about your PHYSICAL address, including how to verify, update or add a new physical address. We have authority over all addressing in unincorporated Pitkin County.

Need to update a MAILING address with a county department?

Please reach out to the appropriate department directly.

Assessors Office (for property tax mailing updates)

Clerk and Recorder (Motor Vehicle Services, Elections) 

Need to look up your municipality?

Aspen, Basalt (Pitkin County portions) and Snowmass Village have addressing authority within their boundaries.  Check out Pitkin Maps & More, our online mapping portal to help with identifying the boundaries.  

Need a new or updated address?

For addressing within Unincorporated Pitkin County, use the forms below.

Request an Address - Online or Printed Form

  1. New Address Assignment
  2. Address  Update
  3. Address Verification or Clarification
  4. Printable Address Form

Click Here to request a New Address

Use this form when there is no address assigned to a parcel and you are adding one or more structures to it. Or if there is an existing addresses and are building a new addressable strucutre. This form is also used when a new named roadway is required.

Address Signage
General Public Address Signage Sheet

Address sign on mailbox

Address Signage is required for all addressable structures within Pitkin County. The primary reason to have the address posted on a building (and at the entrance to a driveway if the building is more than 50 feet from the road) is to help public safety to more easily find a location in the event of an emergency. Having the address posted also helps package carriers find a location.

Commonly Confused Addresses  

Need to confirm municipality or unincorporated county? Address Services has compiled a list of frequently asked about addresses in our Confusing Address Quick Reference
If the address you are inquiring about is not listed, please visit Pitkin Maps and More and confirm via our quick online tool. 

Reference Documentation and Materials

Titled Address Standards (Address Ordinance) 

As the Board of County Commissioners assigned Address Coordinator, the GIS team has the authority to add, update and manage the address data for unincorporated Pitkin County. Addresses for the entire county are incorporated into Pitkin Maps and More for seamless access to valuable information, tied to parcel and owner information, permitting requests, voting districts, subdivisions and more. Addressing is assigned using the current approved standards. Please see pages 12-23 ( 9:08: PITKIN COUNTY ADDRESS SYSTEM) for the detailed text: TITLE 9: ROADS AND PUBLIC PLACES

Street Naming Resources

Street Signage

  • The Property Owner shall be responsible for the cost of signage resulting from New Development. Pitkin County Road & Bridge will order and install any signage required at the junction of a County Road unless the Property Owner requests to install their own signage. The Property Owner shall be responsible for the installation of signage on a private roadway.
  • The Property Owner shall be responsible for the cost and installation of signage at the junction of a private roadway. Pitkin County Road & Bridge will order (but will not install) standardized signage and hardware on behalf of any Property Owner at their request.
  • Pitkin County shall be responsible for the cost of roadway signage related to the naming of a roadway due to the correction of non-conforming areas or addresses that pre-existed the Titled Address Standards.
  • If Pitkin County initiates the re-naming of a roadway, Pitkin County shall be responsible for purchase and erection of the roadway sign.

Any questions related to Street Signage changes resulting from an Addressing Action or on private roadways should be directed to