How was value determined:

1. The range of values for regional wetlands aesthetic/amenity were transferred from two peer-reviewed hedonic studies of housing value adjacent to urban wetlands in Minnesota and Portland, Oregon (Doss and Taff 1996; Mahan et al 2000).
2. The study values were then converted using a coefficient, approximated distance from wetlands, and county-level median housing values (U.S. Census Bureau 2000).

Value estimate limitations:

1. Values represent the influence of urban wetlands on residential property values. The values vary depending on the property value at a specific location, and on the number of households within 1,000 feet of a wetland.
2. We assumed that all types and locations of wetlands have the same influence on property values. Types and distances of wetland to the the property may also influence the property value.