A Study on Condominium and Those Influence on Housing and City Policy

分析了东京市中心除公馆外的分业建筑的房地产状况及其对住房政策和城市政策的影响。对千代田区和滁州市524个街区进行地籍调查和建筑使用情况调查，并对325名公寓业主进行问卷调查。并对10栋城市再开发项目进行了房地产和共管公寓的可能性调查，通过对再开发联盟的书面权利转换计划的阅读和听证。在东京市中心，除公馆外，分割所有权的建筑物正在增加。千代田区此类建筑的总建筑面积占总建筑面积的30%，一些此类建筑超过了豪宅的十倍。经施工后的公寓成品率约为20%。因此，我们需要重新审视涉及共管公寓可能性的此类案件。共管公寓的特点是面积小、数量少、业主少，称为微型开发。但在千代田区，大规模建筑的速度压倒一切。因此，我们通过建筑的地域差异来阐释建筑的双重特征和区位品质。从建筑的进出空间类型的考察来阐述建筑的独立性和建筑的用途，从共同使用的角度来强调狭隘性和争议性。阐述了城市改造项目的在先权与建筑使用的关系，厘清了无围墙公寓的现实状态，探讨了所有权与建筑使用之间的实际控制。从而明确了不同于现有的大规模再开发，公寓组合再开发项目新方式的可能性。

We explicate real state of buildings of divided ownership excepting mansion and those influence on housing and city policy in city center of Tokyo. We carry out survey of cadastres and building-use in 524 city blocks of Chiyoda and Chuou ward, and survey by questionnaire to 325 owners of condominium. And we investigate on real estate and possibility of condominium on 10 buildings of urban redevelopment projects, by perusal of written plan on conversion of rights and hearing to redevelopment unions.Buildings of divided ownership excepting mansion are increasing in city center of Tokyo. A rate of gross floor area of such buildings is 30% of total gross floor area in Chiyoda ward, and a number of such buildings exceeds decuple of mansion. And rate of condominium produced after building process is about 20%. So we need anew examination of such cases involving a possibility of condominium.Characters of condominium are small-scale and small quantity of division and those owners, what is called mini-development. But in Chiyoda ward, a rate of big-scale buildings is overriding. So we explicate double character and locational quality by regional differences of such buildings. And we explicate independence of construction as well as building-use from investigation on types of space for access in such buildings, and emphasis on narrowness and controversial point from view points of joint use.We explicate relation of previous rights and building-use as a result of urban redevelopment projects, clarify a real state of condominium without party wall and investigate on practial control of between ownership and building-use. And so we make clear of possibility on new method of redevelopment project as combination of condominium differ from existing large-scale redevelopment.