台北市雖為首都，但許多老舊建築物參差不齊為人所詬病，民國87 年訂立之「都市更新條例」提供解決此問題之契機，畢竟都市更新能提升土地使用合理性、增加都市防災、增加公共設施等，但近年來都更成功案件數逐年降低，經濟誘因不足為主要因素，私部門沒有足夠之利潤不會進場協商及開發。對於都更而言，最大誘因為主管機關核定之獎勵容積，但如何獎勵能被輿論壓力、民意抑或是環境容忍度所接受，值得吾人深入探討。 而其中，本研究針對基地規模獎勵進行討論，主要原因為並非每個案子皆包含每項獎勵制度，但唯一能夠保證的是基地規模必定存在且基地規模為客觀數值，從源頭基地規模進行討論，提升都市更新的效率。 本研究發現理論容積獎勵值扣除基地規模獎勵值遠大於實際容積獎勵值，代表獎勵容積於實務中已經足夠且基地規模獎勵有討論空間，其原因有許多，包括：(1)其他項申請難度低，私部門傾向容易申請且申請額度高之項目，基地規模獎勵這項申請比例不高、(2)大規模整合困難，其門檻過高、(3)台北市土地稀少，整合3000 平方公尺以上實屬困難。台北市自治條例中基地規模容積獎勵為達到門檻即獎勵落袋之度，且為了保有當初立法原意大規模之整合，並符合現今實務之要求，應將每個級距內獎勵制度起始值提升百分之二，以利加速都市更新。;Granted that the City of Taipei is the jewel of Taiwan, it’s urban prospects often tainted by an asymmetric contrast of defunct as well as modern buildings, side by side. The promulgation of Urban Housing Rehabilitation Act (the Act) offers opportunities for a city to revive itself in terms of zoning, disaster management, and public infrastructure. Nonetheless, due to a stringent review system which provide thin economic incentives to the stakeholders, successful rehabilitation cases have been scant. There is an urgent need to rethink the balance between achieving the goal of this Act and the suspicious views towards the authority in granting the incentive to of the stakeholders. In this, a key factor surrounding any rehabilitation case is the “Scale” of rehabilitation coverage. This particular factor would dictate many aspects of urban rehabilitation, and will be taken as the core of this study. By comparing and analyzing more than a dozen cases in Taipei City, this study found a substantial gap between the Scale occupancy incentive which is actually granted by the Authority and the level of incentive which the Act allows. This shows that there is no need to further elevate the threshold of incentive in the Act. The question however is why most stakeholders choose to ignore the Scale incentive. The main reasons may include: (1) other class of incentives are comparably easier to achieve than Scale, (2) a larger scale rehabilitation generates a much higher threshold for unanimity among stakeholders, (3) the scarcity of land in Taipei City renders the baseline scale of 3,000 square meters unrealistic. The prime suggestions of this study include that (1) authority discretion in granting the Scale incentive should be relinquished, and (2) each Scale incentive level should be added 2 percent points, so that the Scale incentive becomes more viable.
