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

NOTE TO SEATTLE TDR PARTICIPANTS: if you are interested in acquiring and using King County TDRs in the City of Seattle, please contact TDR Program staff before registering for the Exchange.

If you are interested in following market activity or reviewing listing, but do not intend to participate in purchase and sale of TDRs in King County, please do not register, but please do contact a TDR Program staff member directly with your inquiry.

Follow the menu items on the left sidebar to navigate the site. All users can see general information about TDR for sale and wanted listings. Registered users can post listings, see additional details about each listing, and contact buyers or sellers directly regarding purchase or sale of TDRs.

Register now

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.

NOTE: You may wish to consider the most recent available market transactions data prior to posting here

IMPORTANT: Information presented here is not legally binding, and King County does not confirm its accuracy or validity.
For program information, contact Michael Murphy. For Website help, contact Charlie Governali or call 206-477-8767.