Valuing green infrastructure in Portland, Oregon

• A property's sale price increases as distance from a green street increases.
• A facility's age, size, and amount of tree canopy affects a property's sale price.
• Census block or tract is the appropriate scale for measuring green street abundance.

This study uses the hedonic price method to examine if proximity, abundance, and characteristics of green street facilities affect the sale price of single-family residential properties in Portland, Oregon. Different methods for measuring proximity and abundance are explored with distance based on street network, and abundance of green streets at the census tract and census block level, producing statistically significant results. A property's sale price is estimated to increase as distance from the nearest green street facility increases although the magnitude of this effect is small. Facility type does not have a statistically significant effect on a property's sale price, but characteristics such as facility size, proportion of the facility covered by tree canopy, and design complexity are estimated to influence sale price.