The plaintiff is a company that operates air conditioners installation and service business, and the defendant is a company that operates air conditioners wholesale and retail business, machinery and equipment construction business, etc.

B. Around August 2009, the Plaintiff entered into a subcontract with the Defendant, and the Defendant entered into a subcontract with air conditioners and air conditioners (hereinafter “instant construction”) among air conditioners and air conditioners and air conditioners construction works at the construction site of Busan Shipping Daegu Apartment Co., Ltd., Ltd. (hereinafter “former Industrial Development”). On November 30, 2009, the Plaintiff entered into a contract with the Defendant to maintain and repair the said construction (hereinafter “instant subcontract”). The contract amount of KRW 2,846,280,80 (including value-added tax) and the delivery period of August 10, 2009 to October 201, 201, and the warranty period of defect warranty was two years after the completion of the trial operation.

C. While the Plaintiff’s additional construction project was being carried out pursuant to the instant subcontract, the additional construction was made at the Defendant’s request following the change in the design for the modern industrial development, and the price for the additional construction is KRW 25,532,91 (including value-added tax).

On the other hand, the Plaintiff’s discontinuance, etc. of the instant construction work, while continuing the construction work from August 16, 201, suspended the construction work from around August 16, 201. The construction cost that the Defendant paid to the Plaintiff is KRW 2,654,110,850

2. The assertion and judgment

A. We examine the Plaintiff’s claim for the additional construction cost, and the Plaintiff’s additional construction cost was 25,532,91, as seen earlier. Accordingly, the Defendant is liable to pay the Plaintiff KRW 25,532,991 and delay damages therefrom.

(b).