1. As to KRW 1,723,445,186 and KRW 1,001,00,000 among the Plaintiff, Defendant B Co., Ltd. from January 15, 2016, and KRW 722.

1. Basic facts

A. The status of the party and the conclusion of the sales contract 1) The Plaintiff is the party and the Plaintiff is the 1,584 households and their ancillary facilities in Kimpo-si, Kimpo-si (hereinafter “instant apartment”).

2) The E Co., Ltd. (hereinafter “E”) is a seller of the instant apartment for the efficient management and operation of the apartment.

Defendant B (hereinafter “B”) is a contractor who performed the instant apartment construction work by being awarded a contract from E.

On October 5, 2015, Defendant B merged E and comprehensively succeeded to the rights and obligations.

3) Defendant Housing and Urban Guarantee Corporation (hereinafter “Defendant Guarantee Corporation”)

(2) The guarantee company entered into a contract with Defendant B for the repair of defects. (b) On June 15, 2011, 417, 666, G 14, 163 June 14, 2013, G 1,278, 544, 163, June 15, 2012, H 1,022, 835, 3030 June 15, 2012, the Corporation entered the warranty liability of Defendant B on June 14, 2015 (3 years), the aggregate of the warranty liability of Defendant B and the warranty liability of Defendant B, 176, 126, 497, 2012, on June 15, 2015, on June 14, 2015 (3 years), and on June 14, 2016 (14, 2067, 2015).

2) The instant apartment was approved for use on June 15, 2012. At that time, the occupancy of the instant apartment was commenced, and the secured creditor of the instant guarantee agreement was changed to the Plaintiff. C. The Plaintiff transferred the claim for damages in lieu of the defect repair) from the sectional owners of 1,570 households among the sectional owners of the total 1,584 households of the instant apartment.