According to Taipei City Government statistics, at the end of 2003 there were 1.34 million four-story buildings and 920,000 five and six-story buildings in the city older than 25 years, all of which will be targeted for redevelopment.
根據台北市政府民國 92 年底的統計，全市屋齡 25 年以上的 4 層樓建物總數約 134 萬棟，5、6 層建物則有 92 萬棟，都是未來進行更新的標的。