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System Development Charges (SDC)

Transportation System Development Charges (TSDC) Parks System Development Charges (TSDC)

Transportation System Development Charges (TSDC)

Updated Jan. 1, 2018

TSDCs are one-time fees assessed on new or expanded developments in unincorporated Clackamas County based on the number of vehicle trips a particular land use generates. The fees are set to cover the cost of transportation facilities needed to serve the new or expanded development and the people who will occupy or use the development.

TSDCs in unincorporated Clackamas County


A TSDC can be included in the final calculation of building permit fees for residential and commercial projects, if applicable.

For more information, contact Wendi Coryell at, 503-742-4657 or in Transportation Engineering on the third floor of the Development Services Building, 150 Beavercreek Road, Oregon City, OR 97045.

Residential permits

TSDC fees only apply to new or expanded residential dwellings, not to replacement dwellings. County staff may require a replacement dwelling agreement to confirm the prior residence.

TSDCs for new or expanded residential dwellings are as follows:

Type of development TSDC per unit
Single-family residential / detached $4,374 / dwelling unit
Mobile home in park $2,293 / space
Apartment $3,056 / dwelling unit
Condo / townhome $2,670 / dwelling unit
Accessory dwelling unit $3,056 / dwelling unit

Commercial permits/statement of use

All commercial permits (including new uses, change of occupancy and tenant improvements) must include a completed Statement of Use form to be reviewed by the Engineering Division before the permit is issued so that any applicable TSDC rate can be determined. TSDC rates vary depending on the use of the structure. This form is needed to clarify the type of development and past use of the space.

The Statement of Use form must be completed in full and returned to the Engineering Division prior to permit issuance:

Parks System Development Charges (PSDC)

Parks System Development Charges are one-time fees charged to new development to help pay a portion of the costs to meet parks and recreation needs created by growth. PSDC fees are set by the North Clackamas Parks & Recreation District (NCPRD) based on the specific impact a development inside the NCPRD boundaries is expected to have on the District’s population and employment.

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Development Services Building

Transportation Engineering

Phone number 503-742-4691
Address 150 Beavercreek Road
Oregon City, OR 97045
Hours M-Th: 8 a.m. to 4 p.m.
F: 8 a.m. to 3 p.m.

Report a Road Concern