The City of Portland has two Transportation System Development Charge (TSDC) “Overlays” that development in either overlay will pay in addition to the Citywide TSDC. A TSDC Overlay is an additional TSDC that is charged only in and for a specific area. The Overlay boundaries are shown on the links below.
In 2009, the City adopted the first TSDC Overlay for development in North Macadam. The Innovation Quadrant Overlay was adopted in 2011. The TSDC is based on the cost of specific projects that benefit the Overlay zone.
The TSDC Overlay fees will be collected and expended on capacity-increasing projects to serve future users within the boundaries of the Overlay zone. The TSDC Overlay is a funding tool, designed to collect local dollars to leverage other federal, state, and local dollars to fully fund these multi-modal transportation improvement projects.
If you must pay the Citywide TSDCs and your development is in one of the Overlays you must pay both TSDCs: Citywide and the Overlay TSDC. If your development is outside either Overlay you pay only the Citywide TSDCs and do not pay the Overlay TSDC.
You can make a single payment for both TSDCs. The City will deposit the Citywide portion to the Citywide TSDC account, and the Overlay portion to a separate account for either North Macadam or the Innovation Quadrant Overlay.