yoonseong construction co. (윤성건설 주식회사)
Business Registration No.: 2838600730 | Unlisted Corporate Supplier
| English Name (KONEPS / DART) | yoonseong construction co. |
|---|---|
| Korean Legal Name | 윤성건설 주식회사 |
| Business Registration No. | 2838600730 |
| Established Date | 2016-12-21 |
| Region | 경기도 의왕시 |
| Address (KO) | 경기도 의왕시 철도박물관로 176-0, 신기술실용화센터2동 기술사업화연구실 315호 (월암동, 한국철도기술연구원) |
| Homepage | N/A |
| Manufacturer Classification | supplier (공급) |
| Reported Employees | 30 (Self-reported employee count at Korea ON-Line E-Procurement System (KONEPS) registration; may differ from National Pension Service (L1) subscriber counts.) |
| source_url | https://www.g2b.go.kr |
| verified_at | 2026-11-02T04:36:11.608Z |
Public procurement (last 12 months)
Contracts first signed in the last 12 months.
The 12-month window is by original contract signing date: it covers contracts first signed in the period, and excludes amendments registered in the period to contracts signed earlier. Amounts are in KRW from Korea's Public Procurement Service (KONEPS). The 12-month total counts sole contracts in full and joint contracts by the supplier's share; joint contracts without a published share are counted but not summed. Multi-year contracts count only the current-period amount. Unit-price (framework) contracts are reported separately because their values are ceilings, not spend.
| Aggregation Period | 2025-11-01 to 2026-10-31 (basis: original_signed_date) |
|---|---|
| 12-Month Procurement Amount | KRW 2,082,344,450 |
| 12-Month Contract Count | 11 (Joint contracts: 1) |
| Unit-Price (Framework) Contracts (Reported Separately) | 1 contracts | Ceiling: KRW 63,941,380 |
| Procurement Source | https://www.g2b.go.kr (verified: 2026-11-02T04:36:11.608Z) |
By Procurement Category
| Category | Contracts | 12M Counted Amount (KRW) |
|---|---|---|
| Goods (물품) | 0 | KRW 0 |
| Construction (공사) | 10 | KRW 2,082,344,450 |
| Services (용역) | 1 | KRW 0 |
| Foreign Procurement (외자) | 0 | KRW 0 |
By Contract Type
| Contract Type | Contracts | Supplier Share / Current Amount (KRW) | Total Contract Ceiling / Multi-year Total (KRW) |
|---|---|---|---|
| Lump-sum / Standard (총액·일반) | 9 | KRW 2,003,273,950 | KRW 2,569,013,950 |
| Multi-year / Continuing (장기·계속비) | 1 | KRW 79,070,500 | KRW 79,070,500 |
| Unit-price / Framework Ceiling (단가·제3자단가 — excluded from 12M total) | 1 | KRW 63,941,380 | KRW 63,941,380 |
| Unclassified / Zero-amount (기타) | 0 | KRW 0 | KRW 0 |
Top 5 Government Buyers
| Buyer (Korean Legal Name) | Agency Code | Contracts | 12M Amount (KRW) |
|---|---|---|---|
| 서울교통공사 | B553766 | 2 | KRW 1,591,422,030 |
| 경기도 남양주시 화도읍 | 3990037 | 1 | KRW 202,462,870 |
| 경기도교육청 경기도군포의왕교육지원청 | 7642000 | 2 | KRW 134,509,500 |
| 경기도 의왕시 | 4030000 | 3 | KRW 101,909,050 |
| 인천교통공사 | Z003991 | 2 | KRW 31,781,000 |
Recent Contracts (up to 11)
| Signed Date | Contract No. (KONEPS) | Contract Title (KO) | Category / Type | Buyer (KO) | Contract Amount (KRW) | Participation |
|---|---|---|---|---|---|---|
2026-08-10 |
R26TA02129270 |
관광열차 레일 및 턴테이블 보수공사 | construction / lump_sum |
경상북도 문경시 | KRW 20,260,000 |
Sole (100%) |
2026-07-20 |
R26TA02073044 |
인천1호선 작전103A분기기 성능개선공사 | construction / lump_sum |
인천교통공사 | KRW 18,691,000 |
Sole (100%) |
2026-07-09 (chg: 2026-08-11) |
R26TA02041642 |
의왕부곡초 외2교(곡란중, 흥진고) 석면해체제거공사 | construction / lump_sum |
경기도교육청 경기도군포의왕교육지원청 | KRW 55,439,000 |
Sole (100%) |
2026-06-26 (chg: 2026-10-27) |
R26TA02007098 |
2026년 의왕시 빗물받이준설 단가공사 2구역(2차) | construction / lump_sum |
경기도 의왕시 | KRW 83,049,050 |
Sole (100%) |
2026-06-24 |
R26TA01999036 |
2026년 3호선 궤도도상개량공사 | construction / lump_sum |
서울교통공사 | KRW 1,591,422,030 |
Sole (100%) |
2026-06-16 |
R26TA01967683 |
차산3리 인도교 설치공사 | construction / lump_sum |
경기도 남양주시 화도읍 | KRW 202,462,870 |
Sole (100%) |
2026-05-20 |
R26TA01874550 |
2026년 8호선 별내구간 궤도시설 정밀진단 및 성능평가 용역 | services / lump_sum |
서울교통공사 | KRW 565,740,000 |
Joint (share N/A) |
2026-02-24 |
R26TA01523871 |
2026년 의왕시 빗물받이 준설 단가공사(2구역) | construction / unit_price |
경기도 의왕시 | KRW 63,941,380 |
Sole (100%) |
2025-11-18 (chg: 2026-01-30) |
R25TA01091961 |
군포e비즈니스고 석면해체제거공사(계속비) | construction / multi_year |
경기도교육청 경기도군포의왕교육지원청 | KRW 79,070,500 |
Sole (100%) |
2025-11-17 |
R25TA01094659 |
검단오류 분기레일 보수공사 | construction / lump_sum |
인천교통공사 | KRW 13,090,000 |
Sole (100%) |
2025-11-06 |
R25TA01054824 |
어린이보호구역 내 옐로카펫 교체 및 신규 설치 공사 | construction / lump_sum |
경기도 의왕시 | KRW 18,860,000 |
Sole (100%) |
Source & Disclaimer
source_url: https://www.g2b.go.kr | verified_at: 2026-11-02T04:36:11.608Z
Data from Korea's Public Procurement Service (KONEPS contract and supplier records) via data.go.kr. Corporate suppliers only; sole proprietors are excluded. Not investment advice.