Welcome to the TDR Exchange!

This site is intended to facilitate the purchase and sale of Transferable Development Rights in King County, and is primarily for use by TDR certificate holders (owners) and potential buyers (often developers).

If you are interested in obtaining data related to market activity or reviewing listings, but do not intend to participate in purchase and sale of TDRs in King County, please do not register. Instead, please contact a member of the TDR Program staff with your inquiry.

The following terms and conditions apply to the TDR Exchange site:

All activity on this site, including but not limited to registration information, for sale and wanted postings, and offers will be available for King County TDR program staff to review.

We will not share any of your personal information with anyone other than King County TDR staff.

King County TDR Program staff reserve the right to delete user accounts, individual postings, or any other inappropriate content.