Planting a public / street tree can provide an abundance of benefits, not just environmental! For example, a recent study by the City of Portland found that a tree with a canopy cover of 312 square feet (the average for the study) adds $7,593 in value to the house it fronts. Trees also positively influence the values of houses within 100 feet. On average, there are 7.6 houses within 100 feet of a street tree. A tree with 312 square feet of canopy cover adds, on average, $9,241 to the value of neighboring houses.