Empirical Study on the Cost Reduction Effect of Rights Adjustment by the Law System of Condominium Site Selling

2019 Fiscal Year Final Research Report

• Project/Area Number: 15H03345
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Economic policy
• Research Institution: Association of Urban Housing Sciences (2017-2019); Japan Transport Research Institute Research Department (2016); National Graduate Institute for Policy Studies (2015)
• Principal Investigator: Kume Yoshiaki 公益社団法人都市住宅学会(都市住宅研究センター), 都市住宅研究センター, 研究員 (60316643)
• Co-Investigator(Kenkyū-buntansha): 福井 秀夫 政策研究大学院大学, 政策研究科, 教授 (60251633) ; 中川 雅之 日本大学, 経済学部, 教授 (70324853)
• Project Period (FY): 2015-04-01 – 2020-03-31
• Keywords: 区分所有建物 / マンション建替円滑化法 / 土地利用計画 / 不動産競売 / 借地借家法 / 敷地売却制度 / 区分所有関係解消 / 再開発

Outline of Final Research Achievements

It has been a long time since the difficulty of condominium reconstruction project became a social problem. The law system of site selling was established in 2014, but the effect of housing stock improvement is limited because it applies only to condominiums with insufficient seismic performance. Therefore, we have designed cancellation system of unit ownership relation that can be applied for condominiums with obsolete social functions and can reduce agreement formation cost and increase project feasibility. And we have verified the profitability improvement effect of the condominium renewal project by introducing the new system. Furthermore, the percentage of renewable condominiums in the 23 wards that are 45 years old or older is estimated. It will increase from 3.8% to 17.9% due to the introduction of the new system. In addition, in order to smoothly renew the stock of urban condominiums, it is necessary to improve the system regarding foreclosure and rental housing.

Free Research Field

都市計画　法と経済学

Academic Significance and Societal Importance of the Research Achievements

マンションの区分所有関係解消制度をどのように設計するかという重要な法政策課題に対して、法と経済学の分析手法が適用され、貴重な知見が得られた。また新たなマンション建替え制度導入による効果を計量的に推計した点でも、学術的に独自の価値を有する。本研究成果は、法政策実務においても有効に活用されうるし、立法に結実すれば、マンションストックの円滑な更新という社会的課題に応えるという意義を有すると考えられる。