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TDR Sales Data
Transferrable Development Rights (TDR) from rural sending sites are used in cities and within unincorporated urban areas of King County. In unincorporated urban areas, each rural TDR equals 2 additional lots in urban subdivision; inside partner cities, each rural TDR equals a specific amount of additional commercial or residential square footage unique to the partner city according to the terms of an interlocal agreement with King County. Rural TDRs are also used in rural King County to increase square footage of an accessory dwelling unit.
Rural TDR transactions occur between private individuals or organizations; they may also be conducted by King County.
Download a data table of private TDR market sales of rural TDR credits Download Excel file (~20 KB).
Download a data table of King County TDR Bank sales of rural TDR credits Download Excel file (~20 KB).
| Rural TDR Market Summary Data - Years 2000 - 2022 | ||
| # TDRs Sold | $ Value (nominal USD in year of transaction) | |
|---|---|---|
| Total | 2,124 |
$ 51.4 million total |
| Median sale | 5 | $ 22,361 / Rural TDR |
| Average sale | 16 | $ 22,726 / Rural TDR |
Transferrable Development Rights considered urban are only used in unincorporated urban areas of King County where each urban TDR equals 1 additional lot in an urban subdivision.
Download a data table of private TDR market sales of urban TDR credits Download Excel file (~20 KB).
| Urban TDR Market Summary Data - Years 2000 - 2022 | ||
| # TDRs Sold | $ Value (nominal USD in year of transaction) |
|
| Total | 229 | $ 1.78 million total |
| Median sale | 2.5 | $ 8,250 / Urban TDR |
| Average sale | 5 | $ 8,906 / Urban TDR |
For questions about the TDR Program, please contact Nicholas Bratton, TDR Program Manager, or Anne-Gigi Chan, Land Conservation Project Manager, King County WLRD Rural and Regional Services Section.