일성건설(주)

Customer center

Headquarters

Address	4th and 5th floor, 21, Gukhoe-daero 62-gil, Yeondeungpo-gu, Seoul (Yeouido-dong, Dongseong Bldg)
Tel	02-3271-6000
Fax	02-719-3474

Yongin office

Address	10, Yonggu-daero 2469beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea

Headquarters
4 and 5th floor Il Sung Construction Co., Ltd., 21, Gukhoe-daero 62-gil, Yeondeungpo-gu, Seoul
TEL 02-3271-6000FAX 02-71-3474
Yongin office
10, Yonggu-daero 2469beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea