1. The Defendant’s KRW 601,60,542 as well as the Plaintiff’s annual rate from June 28, 2017 to December 21, 2017.

1. Basic facts

A. The Plaintiff is a company that designs and supervises the construction of a building, and the Defendant is a housing reconstruction and improvement project association established under the Act on the Maintenance and Improvement of Urban Areas and Dwelling Conditions for Residents (hereinafter “Urban Improvement Act”) for a housing reconstruction and improvement project that sets up one unit of 780 Seo-dong, Pyeongtaek-si as an improvement

B. At around 209, the owners of the Seo-si and Seo-dong 780 residential units and land were organized a “Preliminary Committee for Establishment of Housing Reconstruction Improvement Project” (hereinafter “Preliminary Promotion Committee”) in order to reconstruct the housing units of Pyeongtaek-dong 780, Seo-dong, Seo-dong, Seo-si.

C. On December 22, 2010, the Plaintiff and the instant provisional name promotion committee entered into an improvement plan (a construction planning field) agreement with the following contents:

1. Title of service: Construction design service for the reconstruction and consolidation project partnership's rearrangement plan in Pyeongtaek-si;

2. Location of a building site: Pyeongtaek-dong 780.

3. Design outline 1) Site area: For the purpose of use 56,61.10 square meters: Total floor area of multi-family housing (multi-family housing) (multi-family housing 3): The area publicly notified as a rearrangement plan: 4 square meters of reinforced concrete: The underground floor and the ground floor;

4. Contract amount: The service cost for the design business shall be separately determined with the unit price per square meter in consultation with the promotion committee of this case (the title of this case) and the Plaintiff, by 3,30 won, and the total amount of remuneration for the design business shall be determined by multiplying the total floor area of the rearrangement plan designated by the total area

Article 2 (Period of Service) The period for performing design work shall be from the date of the service contract to the date of public notice of designation of the maintenance plan.

Article 3 (Scope of Services) (Scope of Services) The scope of services to be provided to A shall be the affairs of preparing construction drawings and specifications necessary for designating a rearrangement plan (hereinafter referred to as "design affairs").

Article 4 (Method of Providing Design Services and Payment) 1) If on-site conditions and design conditions are special or are added to duties, consultation with Gap and Eul shall be determined. 2) When the service costs are to be paid in installments, the time and amount to be paid shall, in principle, be met as follows: