1. The plaintiffs' claims against the defendants are all dismissed.

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

1. Basic facts

A. Defendant Crebuilding and rearrangement project association (hereinafter “Defendant Crebuilding and rearrangement project association”) is a housing reconstruction project association established in order to implement the housing reconstruction project (hereinafter “instant project”) that constructs one apartment unit with the size of 2 underground floors and 52 units on the ground surface of 14th above the Seoul Seongdong-gu Seoul, (hereinafter “instant apartment unit”). Defendant Crebuilding and New Public Co., Ltd. (hereinafter “Defendant New Co., Ltd”) is a construction project for the said apartment unit (hereinafter “instant construction project”).

B. On November 22, 2011, Defendant New Co-operation entered into a contract for the construction work of this case between the Defendant Union and the construction cost of 9,712,00,000,000 and the construction period from November 25, 201 to August 31, 2012. The Defendants agreed under the said contract that the Defendant Union will build an apartment unit for the said land and pay the construction cost (the construction cost) to the general apartment unit after the completion of construction.

C. On March 22, 2012, Defendant Il- New Co., Ltd. (hereinafter “the same development construction”) decided to pay the aggregate of the instant construction works, electricity, installation, external, finishing, unit, and miscellaneous construction to the same development construction company (hereinafter “the same development construction”), and the construction period of the instant construction is determined from March 19, 2012 to September 30, 2012 as apartment units 28, and the construction period of the instant apartment units was determined and subcontracted to the same household. The Plaintiff Ho- New Co., Ltd. (hereinafter “Plaintiff Ho-dong Construction”) concluded a subcontract between March 19, 2012 and September 30, 2012. The Plaintiff Dong-dong Co., Ltd. (hereinafter “Plaintiff Dong-dong”) established a reinforced concrete construction among the instant construction; the Plaintiff Co., Ltd. (hereinafter “Plaintiff A”) installed machinery and equipment construction works among the instant construction; and the Plaintiff Co.,, Ltd. (hereinafter “Plaintiff”) established an electrical construction works among the instant construction works.