Well-designed integration of conservation features positively affects home values. In a study of 6 subdivisions in Cedar Rapids, Iowa, open space added an average of $462 to standard subdivision homes and $17,082 to conservation subdivision homes.
Bowman, Troy, Jan Thompson, and Joe Colletti. (2009). Valuation of open space and conservation features in residential subdivisions. Journal of Environmental Management 90(1), 321-330.