1. The plaintiffs' respective claims against the defendants are dismissed in entirety.

2. The costs of lawsuit are assessed against the plaintiffs.

1. Basic facts

가. 이 사건 공동주택의 신축 및 대지권등기 1) 서울 서대문구 AI 임야 926m ^{2}, AJ 임야 50m ^{2}, AK 임야 165m ^{2}, AL 임야 1,114m ^{2}, AM 임야 632m ^{2}(이하 ‘이 사건 분할 전 토지’라 한다

) The Plaintiff Company, Plaintiff B, C, NonpartyN, AO, AP, Q, and AR (hereinafter collectively referred to as “Plaintiff, etc.”).

The Plaintiff Company owned an apartment house with a total of 47 households on the ground before the instant partition (hereinafter “instant apartment house”).

A) After newly building and completing registration of ownership preservation, the number of buyers were sold in lots and completed registration of ownership transfer in the future. In light of the fact that the trade name (AH) and the name of Plaintiff B prior to the alteration of the Plaintiff Company was stated in the column of buyers in the sale contract (Evidence A6), the representative of the Plaintiff Company at the time of sale appears to have been Plaintiff B at the time of sale. Meanwhile, as the Act on the Ownership and Management of Aggregate Buildings (hereinafter “Act on the Ownership and Management of Aggregate Buildings”) was enacted and enforced by Act No. 3725, Sept. 22, 1986, the land prior to the division was the land which is the object of the site ownership, and the ownership was the site ownership registration for the instant apartment house was completed with ownership 51.9/28

(다만, 이 사건 공동주택 가동 306호의 경우 이 사건 분할 전 토지 중 서울 서대문구 AI 임야 926m ^{2}, AJ 임야 50m ^{2}, AK 임야 165m ^{2}, AL 임야 1,114m ^{2}에 관하여는 56.2/2887 지분, 다동 지층 1호, 2호의 경우 16.53/2887 지분의 대지권등기가 마쳐졌다). 나.

이 사건 분할 전 토지의 분할 및 환지 1) 이 사건 분할 전 토지 중 서울 서대문구 AI 임야 926m ^{2}는 1998. 9. 30. AI 임야 2010. 3. 26. 지목이 ‘도로’로 변경되었다. 142m ^{2} 및 AS 임야 784m ^{2}로 분할되어 1998. 10. 7. 분할등기가 경료되었다. 2) 한편 서울 서대문구 AT 일대 476필지 155,731.5m ^{2}를 사업시행구역으로 하는 AU 주택개량재개발사업의 사업시행자인...