A. The development of the Sejong Industry Co., Ltd. is KRW 405,018,876 and its related thereto from September 17, 2013 to September 2015.

A. The status of the parties (1) The Plaintiff is an organization comprised of occupants in order to manage more than 600 households in Busan-gun A apartment (hereinafter “instant apartment”) in Busan-gun.

(2) The development of the three-dimensional industry (hereinafter “Defendant Sejong Industry Development”) is a company specialized in apartment repair, etc.

(3) The Defendant Specialized Construction Mutual Aid Association is a corporation that entered into a warranty contract on the instant apartment between the Defendant Specialized Construction Mutual Aid Association and the Defendant Specialized Construction Mutual Aid Association.

B. (1) On June 24, 2010, the Plaintiff entered into a contract for the repair work of the instant apartment (hereinafter “instant primary repair work”) with Defendant Sejong Industrial Development on the terms of contract for KRW 1,817,308,00 for the construction work of the instant apartment for KRW 1,817,300 (hereinafter “instant primary repair work”). The development of the Defendant Sejong Industrial Development completed the instant primary repair work on April 28, 201.

(2) On April 28, 201, Defendant Specialized Construction Mutual Aid Association entered into a contract for warranty of defects (hereinafter “instant warranty contract”) with the Plaintiff on the guarantee accident that occurred during the instant primary repair work (any defect that occurred due to construction in violation of design drawings or other instructions, which the contractor failed to perform within the warranty period even though the contractor requested repair from the contractor within the warranty period) with the Defendant Specialized Construction Mutual Aid Association.

The warranty period of the letter of warranty (the warranty period of warranty) 1 A apartment warranty (the warranty period of warranty) is from April 28, 201 to April 27, 2012 (one year) 7,783,825 2 A apartment repair work (civil engineering and water) C from April 28, 2011 to April 27, 2013 (2 years) 13,081,575 combined amount of 90,865,400 (3) on December 29, 2011 to the development of the defendant Sejong Industrial Development for the purpose of repairing the three-year defects under the Housing Act of this case (hereinafter “the second repair work of this case”). < Amended by Act No. 10637, Apr. 28, 2011>