What are system development charges (SDCs)?
System development charges (SDCs) are fees paid by new development to recover a portion of the cost of existing infrastructure and to help fund new infrastructure necessary to serve new development. Infrastructure includes water, sanitary and storm systems, streets and parks.
SDCs are collected at the time a building permit is issued for new construction. Existing developed properties also pay SDCs when connecting to the sanitary or storm systems. An incremental SDC is collected when the use of a developed property intensifies, requiring a larger water meter or creating more impervious area.
How are SDCs calculated?
SDCs are calculated by considering:
- The replacement cost of exiting public facilities
- Prior contributions of the property owner to the public facility system.
- Public facility capacity requirements of a particular development, and:
- Cost of capital improvements to provide adequate capacity to new users.
Current SDC Charges*
SDCs for a single family home with a 5/8” X ¾” water meter total $21,022.00.
If you would like more information regarding system development charges (SDCs), please contact the Building Division at 503-682-4960. For more information about adoption of SDC's in the city see the SDC Ordinance page.
*Note: All System Development Charges are subject to increase annually effective on July 1st of each year based on the Seattle Construction Cost Index and as approved by Wilsonville City Council.