抄録
In Japanese residential zones, the housings, which have built after World War 2, 1950's to 1970's, are going to be rebuilt, recently. Some sites have important heritage trees and greens. However, the municipalities have few powers legally to protect the trees and greens, even if they have green protection ordinances, development review ordinances which has the standards related to protection of landscape, or some kinds of ordinance.So, this paper aims to identify the key points for effective tree protection ordinance as a system, through reviewing the tree protection regulations in Seattle city, Washington, USA. Seattle city is very famous as an advanced city in terms of urban planning. The research materials are the ordinances, client assistance memos, director's rules, and the documents related to the tree protection regulations published by the city. As a result of my analyzing, the effective points for the tree protection are, to do the site plan review which includes landscape plan with the environmental and the design review at the same time, to have the floor area incentives as a compensation for tree protection, and to have the detailed different standards which depends on the species, even the native and non-native species.
