System Development Charges

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What Are SDCs?

System Development Charges (SDCs) are one‑time fees assessed on new development to pay for the public facilities needed to serve that development. They ensure that growth pays its fair share of improvements and expansions to our community infrastructure.

Current McMinnville SDC Rates: SDC Rates

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The Three SDC Components

When you build or expand, three SDC components may apply:

Transportation
- Covers roads, sidewalks, signals, and transit improvements to handle new traffic.
Sanitary Sewer
- Funds capacity upgrades in sewer mains and treatment facilities based on added wastewater flows.
Parks
- Only for new dwelling units; supports parkland acquisition and development.

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How a SDC Is Calculated?

Each component is driven by a measure of “net impact”:

Component Basis of Charge

Transportation Number of new vehicle trips generated

Sanitary Sewer Number of plumbing fixture units (PFUs) added

Parks Number of new dwelling units

Net Impact = New demand ⁠− credits for any removed or relocated facilities
• If you remove old fixtures or trips (e.g., demo an existing building), those credits reduce your SDC.

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Requesting an SDC Estimate

To get a project-specific SDC estimate, please email with the following:

Description of Use(s)
- E.g., “Retail store (3,300 sq ft), office space (1,240 sq ft).”
Square Footage of each use
Plumbing Fixture Count
- Fill out the Plumbing Fixture Form indicating existing, new, and removed fixtures.
Number of Dwelling Units (if any)

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Tip: Gather as much detail as possible up front to streamline the estimate. Once we have your info, we’ll calculate each component, apply any credits, and send you an estimate for the SDC amount.

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Transportation SDC and Sanitary SDC fees will be waived for certified affordable housing projects. Parks SDC fees are still required on certified affordable housing projects.

Questions related to calculation and methodology for SDC fees contact Engineering at 503-434-7312