1. The plaintiff's claim is dismissed.

2. The costs of lawsuit shall be borne by the Plaintiff.

1. Basic facts

A. On March 19, 1998, the Plaintiff newly constructed a house of 87.6 square meters on the ground B of the Gu-U.S., Si-si B of the light-to-land B of the light-to-land (hereinafter “instant house”).

B. Around July 23, 2010, the Defendant performed D Maintenance Work (hereinafter “instant 2010 construction work”) in the Guro-si, Seoul Special Metropolitan City (hereinafter “instant construction”).

C. On June 10, 2013, the Plaintiff repaired the toilets of the instant housing, and paid 1.3 million won as the construction cost.

On March 2015, the Plaintiff paid KRW 400,000 as the construction cost.

E. Around May 2015, the Defendant filed a civil petition that was not connected to the drain pipe of the instant house, and performed an emergency restoration work with a content that connects the drain pipe to the drain pipe from July 7, 2015 to July 14, 2015.

F. At present, several walls of the instant housing were placed in the military, and the cost of repairing defects is KRW 26.4 million.

[Based on recognition] Gap evidence Nos. 1, 2, 5, 8, Eul evidence Nos. 6 (including paper numbers; hereinafter the same shall apply), Gap evidence Nos. 3 and 4, Gap witness E's testimony, the result of the court's entrustment of appraisal to appraiser F, the purport of the whole pleadings

2. The plaintiff's assertion and judgment

A. The Plaintiff asserted that, at the time of the construction in 2010, the construction of the instant housing, the construction defect caused by the Defendant’s failure to connect the kitchen drainage pipe to the drain pipe, and caused the instant housing defect, such as the subsidence of the ground of the instant housing from around around 2013, which caused the collapse of the walls, and the water drain, etc. In order to find the cause of the instant defect, the Plaintiff was obligated to pay the Plaintiff KRW 28,100,000,000 (= KRW 4,000,000,000,000,000,000,000,000,000) due to the Defendant’s mistake, for the purpose of finding the cause of the instant defect.

(b) judgment;