COMPANY RECORD · CHICAGO, IL
Jin Hwan Ko — permit history in Chicago, IL
Jin Hwan Ko appears on 57 Chicago permit records from 2012 through 2026, all of them plumbing.
Permit categories
| Category | Permits | Share |
|---|---|---|
| Plumbing | 57 | 100% |
Activity by year
| Year | Permits issued |
|---|---|
| 2012 | 1 |
| 2013 | 5 |
| 2014 | 7 |
| 2015 | 6 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2024 | 1 |
| 2025 | 2 |
| 2026 | 4 |
Busiest year on record: 2014, with 7 permits. One project can account for several filings, so read this as filing activity rather than workload.
Named on the same permit
| Name in source | Linked permits | Last seen |
|---|---|---|
| Pnk Construction, Inc. | 5 | 2021-11-18 |
| Northeast Contractors Inc | 4 | 2019-03-15 |
| A Interiors Corporation | 3 | 2014-04-21 |
| Rey Rivera Construction Inc | 3 | 2020-04-21 |
| Dmf Build Property LLC | 3 | 2020-04-21 |
| Swk Design Corp | 2 | 2024-09-19 |
| Green Eco Construction, Inc. | 2 | 2014-01-16 |
| Low Price Remodeling, Inc. | 2 | 2016-04-22 |
| Lucky Construction | 2 | 2014-07-22 |
| Noej Builders, Inc | 2 | 2026-07-29 |
| Troy Construction | 1 | 2021-08-18 |
| Tran Building & Design Inc | 1 | 2021-02-01 |
37 companies are named alongside Jin Hwan Ko on the same Chicago permit. A shared permit is a documented co-appearance, not proof of a current contract. Names appear as the authority published them.
Where they worked
| Address in source | Most recent permit |
|---|---|
| 6812 S PAULINA ST | 2026-08-07 |
| 2535 N MILWAUKEE AVE | 2026-07-29 |
| 3649 N WESTERN AVE | 2026-04-09 |
| 3800 S KEDZIE AVE | 2026-02-26 |
| 4808 N BERNARD ST | 2025-11-20 |
| 5708 N MAJOR AVE | 2025-03-14 |
| 3913 W MADISON ST | 2024-09-19 |
| 4604 N KEDZIE AVE | 2022-05-17 |
| 3955 W MADISON ST | 2022-01-14 |
| 2053 W HOWARD ST | 2021-11-18 |
| 6001 N KEYSTONE AVE | 2021-09-01 |
| 4608 N DOVER ST | 2021-08-18 |
| 5401 S WENTWORTH AVE | 2021-02-01 |
| 3932 W CERMAK RD | 2020-11-17 |
55 distinct addresses on record; the 14 most recent are shown. Declared value on record runs from $0 to $650,000, median $30,000. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.
Permits on record
57 permits; open the 50 most recent
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| 101079156 | 2026-08-07 | Plumbing | 6812 S PAULINA ST | SPR 2019 CBRC: INTERIOR REMODEL AND 2ND FLOOR FRAME DORMER ADDITION TO EXISTING 1.5 STORY FRAME SINGLE FAMILY RESIDENCE WITH BASEMENT. (OCCUPANCY GROUP R-5; TYPE 5A CONSTRUCTION) | $35,000 |
| 101073105 | 2026-07-29 | Plumbing | 2535 N MILWAUKEE AVE | SPR 2019 CBRC: BAR AND DINING AREA INTERIOR ALTERATION AT KOREAN RESTAURANT (OCCUPANCY CLASSIFICATION, A-2, CONSTRUCTION TYPE, III-B).**CERTIFIED CORRECTIONS SUBJECT TO FIELD INSPE | $200,000 |
| 101074993 | 2026-04-09 | Plumbing | 3649 N WESTERN AVE | SPR 2019 CBC: INTERIOR ALTERATIONS TO EXISTING 1 STORY MERCANTILE TO CONVERT FROM MERCANTILE TO DINING (B OCCUPANCY, CONSTRUCTION IIB) | $650,000 |
| 101065876 | 2026-02-26 | Plumbing | 3800 S KEDZIE AVE | SPR 2019 CBRC: INTERIOR ALTERATIONS / CONVERT 1 D.U. TO 2 D.U. ON 2ND FLR. / CONVERT 1 STORE TO 4 OFFICE SPACES ON 1ST FLOOR TYPE V-A CONSTRUCTION.(CONDITIONAL PERMIT SUBJECT TO FI | $100,000 |
| 101069086 | 2025-11-20 | Plumbing | 4808 N BERNARD ST | 2019 CBC SPR: INTERIOR RENOVATION OF A GROUND FLOOR TENANT SPACE (4808-10 N. BERNARD ST.) TO CONVERT TO WHITE BOX RETAIL SPACE AND CORRECT VIOLATIONS WITHIN AN EXISTING THREE-STORY | $25,000 |
| B200416672 | 2025-03-14 | Plumbing | 5708 N MAJOR AVE | REPAIR OR IN-KIND REPLACEMENT OF 1 PLUMBING FIXTURES AS DESCRIBED IN PERMIT APPLICATION. INCLUDES REPAIR OR REPLACMENT OF PLUMBING PIPING. LOCATIONS: 1 RESIDENTIAL UNIT(S), 0 NON | $10,500 |
| 101053551 | 2024-09-19 | Plumbing | 3913 W MADISON ST | SPR 2019 CBRC: EXISTING ALTERATION TO EXISTING RETAIL SPACE TO UNIT #3979. WORK INCLUDES RELOCATION OF EXISTING WASHROOM AND NEW DRINKING FOUNTAIN (OCCUPANCY GROUP M; TYPE IIB CONS | $70,000 |
| 100961310 | 2022-05-17 | Plumbing | 4604 N KEDZIE AVE | SPR 2019 CBRC: NEW MOP BASIN. NEW DRINKING FOUNTAIN.(NO HVAC WORK UNDER THIS PERMIT) | $2,000 |
| 100934168 | 2022-01-14 | Plumbing | 3955 W MADISON ST | INTERIOR ALTERATION, COMBINING 3 COMMERCIAL STORES INTO 1 CLOTHING STORE, ARCHITECTURAL, MECHANICAL, ELECTRICAL AND PLUMBING DISCIPLINES INVOLVED. | $100,000 |
| 100883384 | 2021-11-18 | Plumbing | 2053 W HOWARD ST | INTERIOR ALTERATION IN THE EXIST. RETAIL SPACES FOR THE EXPANSION OF EXISTING DAYCARE IN THE EXIST. 1-STORY BLDG. COMPLYING EXISTING TOILET ROOMS UP TO ADA STANDARDS. PROVIDING HA | $20,000 |
| 100938094 | 2021-09-01 | Plumbing | 6001 N KEYSTONE AVE | CORRECT ALL PLUMBING CODE VIOLATIONS....PLUMBING FIXTURE REPAIR AND INSTALLATION ALL DWV AND WATER PIPE REPAIR AND DECONVERSION OF FIXTURE AND DWV AND WATER PIPING IN COMMERCIAL BU | $3,250 |
| 100925569 | 2021-08-18 | Plumbing | 4608 N DOVER ST | REPAIR/REPLACE HARDWOOD FLOORS, DOORS, CABINETS, COUNTER TOPS, FLOOR TILE, REPLACE PLUMBING FIXTURES WITH ASSOCIATED PIPING (SAME LOCATION - SEPARATE ELECTRICAL PERMIT REQ'D) MOVE | $140,000 |
| 100895188 | 2021-02-01 | Plumbing | 5401 S WENTWORTH AVE | REPAIR SMOKE DAMAGE FROM CIVIL UNREST AND VANDALISM ADDITIONAL INTERIOR ALTERATIONS FOR NEW RESTROOMS AND REPAIR EXISTING MEZZANINE AREA (CONDITIONAL PERMIT SUBJECT TO FIELD INSPEC | $300,000 |
| 100900073 | 2020-11-17 | Plumbing | 3932 W CERMAK RD | PLUMBING ONLY: CORRECT PLUMBING VIOLATONS DATED 10-23-2020; SUBJECT TO FIELD INSPECTIONS...PLUMBING FIXTURE INSTALLATION AND PIPE REPAIR AND INSTALLATION. | $0 |
| 100894792 | 2020-10-08 | Plumbing | 3616 W LAWRENCE AVE | .PLUMBING FIXTURE INSTALLATION AND ASSOCIATED PIPING,ALL PLUMBING CODE VIOLATION CORRECTIONS | $1,500 |
| 100876458 | 2020-08-17 | Plumbing | 1856 S ASHLAND AVE | INTERIOR ALTERATION FOR NEW LIMITED RESTAURANT (JUICE BAR) IN THE EXISTING 1-STORY COIN LAUNDROMAT. ALL WORK AS PER PLANS.(CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS. | $65,000 |
| 100823139 | 2020-04-21 | Plumbing | 4126 W MADISON ST | INTERIOR RENOVATION OF EXIST 2 STORY MASONRY MIXED USE BUILDING WITH EXISTING GROUND FLOOR RETAIL SPACE AND 2ND FLOOR RESIDENTIAL TO REMAIN. WORK ON ALL FLOORS FOR NEW MEP SERVICE | $160,000 |
| 100851948 | 2019-11-21 | Plumbing | 409 E 103RD ST | REVISION TO PERMIT # 100801507 TO CHANGE PLUMBING CONTRACTOR TO JIN HWAN KO | $1 |
| 100839197 | 2019-09-04 | Plumbing | 5825 N TRIPP AVE | WORK IN ONE COMMERCIAL SPACE: TILE. MOLDING. PAINT. REPLACE SINK WITH ASSOCIATED PIPING. REPLACE DRYWALL. REPLACE APPX 6 METAL STUDS ON WALL WHERE SINK IS LOCATED. (NO ELECTRICAL | $9,800 |
| 100795847 | 2019-06-25 | Plumbing | 2321 W HOWARD ST | ALTERATIONS TO AN EXISTING RESTAURANT TO AN EXISTING 1 STORY BRICK BUILDING | $80,000 |
| 100806388 | 2019-03-15 | Plumbing | 3759 N HARLEM AVE | REVISION TO PERMIT NO. 100724306;CHANGE OF GC TO NORTHEAST CONTRACTORS; CHANGE OF PLUMBING CONTRACTOR TO JIN HWAN KO; CHANGE OF HVAC CONTRACTOR TO C&K ENGINEERING CO. CHANGE OF MAS | $250,000 |
| 100758202 | 2018-12-18 | Plumbing | 4515 S EMERALD AVE | REPAIR EXISTING 3 STORY FRAMED WITH 2 NEW DORMERS. (CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS) | $45,000 |
| 100794318 | 2018-11-28 | Plumbing | 2729 S KOMENSKY AVE | WATER & FIRE DAMAGE REPAIR TO EXISTING, 2 STORY, 2 DU APARTMENT BLDG. | $126,000 |
| 100785600 | 2018-09-28 | Plumbing | 651 W WASHINGTON BLVD | PLUMBING ONLY,ADD HANDSINK TO (1) 1ST FLOOR COMMERCIAL SPACE; SUBJECT TO FIELD INSPECTIONS | $2,000 |
| 100692613 | 2018-09-13 | Plumbing | 2218 W CULLERTON ST | INTERIOR AND EXTERIOR RENOVATION OF EXISTING 2 1/2 STORY MASONRY MULTI UNIT RESIDENCE WITH BASEMENT; TO BE CONVERTED INTO A 3-STORY, 2-UNIT RESIDENCE WITH BASEMENT; PROPOSED NEW RO | $100,000 |
| 100767161 | 2018-08-28 | Plumbing | 2823 N LINCOLN AVE | INTERIOR BUILDING OUT FOR A NEW COFFEE SHOP AND TOILET ROOM ALTERATION | $10,000 |
| 100767989 | 2018-08-06 | Plumbing | 916 S LEAVITT ST | INTERIOR RENOVATION AND NEW 2 STORY, III-B ADDITION TO EXISTING 2 STORY, III-B, 2DU APARTMENT BUILDING W/BASEMENT TO CONVERT TO 3DU AS PER PLANS CURRENT USE: MULTI UNIT RESIDENTIAL | $149,000 |
| 100749065 | 2018-02-27 | Plumbing | 2723 N PULASKI RD | PLUMBING ONLY, INSTALL 3 COMPARTMENT & HAND SINK. | $0 |
| 100734673 | 2017-12-28 | Plumbing | 9526 S CLAREMONT AVE | INTERIOR ALTERATIONS TO 1 STORY FRAME HOUSE INCLUDING BUT NOT LIMITED TO REMOVE/RELOCATE PARTITIONS ON 1ST FLOOR RELOCATE WINDOW AT SOUTH ELEVATION PER PLANS TO ADDRESS VIOLATIONS. | $30,000 |
| 100737245 | 2017-11-27 | Plumbing | 3159 W ADDISON ST | REVISION TO PERMIT #100727293 TO CHANGE THE VENTILATION & REFRIGERATION CONTRACTOR OF RECORD TO HEAT COOL SERVICE, CO & PLUMBER TO J.H. KO PLUMBING. | $1 |
| 100711062 | 2017-09-06 | Plumbing | 4634 N CUMBERLAND AVE | INTERIOR ALTERATIONS, REMOVE AND REPLACE NON-LOADBEARING PARTITIONS, CONVERT EXISTING BUSINESS SPACE TO HEALTH SPA, ELECTRICAL, PLUMBING, AND MECHANICAL WORK INCLUDED; ALL WORK AS | $35,489 |
| 100685308 | 2017-04-05 | Plumbing | 3151 S HALSTED ST | EXISTING TWO STORY REAR SINGLE FAMILY TO BE RENOVATED PER PLANS.(DEMOLITION OF THE FRONT BUILDING IS NOT PART OF THIS PERMIT. SEE PERMIT 100689735) (CONDITIONAL PERMIT SUBJECT TO F | $150,000 |
| 100664728 | 2016-11-28 | Plumbing | 1931 W BELMONT AVE | COMMERCIAL INTERIOR BUILD OUT FOR NAIL SHOP. ARCHITECTURAL/ ELECTRICAL / MECHANICAL/ PLUMBING PER DRAWINGS.**CERTIFIED CORRECTIONS- - SUBJECT TO FIELD INSPECTIONS & AUDIT ** | $50,000 |
| 100633204 | 2016-11-07 | Plumbing | 3324 S MAY ST | REMOVE ILLEGALLY INSTALLED KITCHEN SINK & CABINETRY, ENLARGE WINDOWS AND RETURN TO ITS ORIGINAL CONDITION - SINGLE FAMILY RESIDENCY PER CODE. **CERTIFIED PLAN CORRECTIONS PROJ | $2,500 |
| 100645289 | 2016-07-20 | Plumbing | 4434 W DIVERSEY AVE | EXTERIOR & INTERIOR ALTERATION FOR RETAIL SPACES | $80,000 |
| 100643670 | 2016-06-30 | Plumbing | 4035 W MADISON ST | INTERIOR BUILD-OUT FOR NEW RETAIL SPACE, WHICH INCLUDES ARCHITECTURAL, ELECTRICAL, MECHANICAL AND PLUMBING CHANGES TO EXISTING SPACE. | $100,000 |
| 100642595 | 2016-04-30 | Plumbing | 3736 W LAWRENCE AVE | INSTALLING (1) COMPARTMENT SINK AND (1) HAND SINK TO EXISTING MERCANTILE SPACE ON 1ST FLOOR TO AN EXISTING MASONRY BUILDING, COMMERCIAL AND APARTMENTS AS PER ARCHITECTURAL PLANS. | $2,000 |
| 100637097 | 2016-04-22 | Plumbing | 4750 N WESTERN AVE | CONVERSION FROM 1 D.U. TO 2 D.U. INTERIOR BUILDOUT ON 2ND FLOOR ONLY PER PLANS(CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS) | $65,000 |
| 100602167 | 2015-10-26 | Plumbing | 3112 W LAWRENCE AVE | INTERIOR BUILD OUT WITH MINOR PARTITION REMOVAL AND INSTALLATION- RENOVATE AND BUILD TWO TOILET ROOMS PER ACCESSIBILITY CODE. | $20,000 |
| 100619783 | 2015-10-21 | Plumbing | 1627 E 87TH ST | CHANGE PLUMBER TO JIN HWAN KO FOR PERMIT 100587206 | $1 |
| 100619602 | 2015-10-20 | Plumbing | 3145 S INDIANA AVE | CHANGE PLUMBER TO JINHWAN KO FOR PERMIT 100588987 | $1 |
| 100605450 | 2015-09-15 | Plumbing | 2416 W WILSON AVE | INTERIOR GUT REHAB TO A 2 DWELLING UNIT BUILDING TO CONVERT A S.F.R.. EXTERIOR BRICK REPAIR AND FRONT AND REAR MASONRY WALL REBUILD AS PER ARCHITECTURAL PLANS. | $30,000 |
| 100595560 | 2015-05-20 | Plumbing | 4555 W WELLINGTON AVE | REPLACEMENT OF 3 BATHTUBS AND 3 SHOWER VALVES.NO OTHER WORK UNDER THIS PERMIT. PLUMBING ONLY,SUBJECT TO FIELD INSPECTION. | $0 |
| 100581309 | 2015-02-13 | Plumbing | 1645 W CHICAGO AVE | CHANGE PLUMBER TO JIN H. KO FOR PERMIT 100536754 | $1 |
| 100546350 | 2014-12-26 | Plumbing | 3116 W LAWRENCE AVE | NEW TENANT RETAIL SPACE - ALTERATIONS TO BASEMENT AND 1ST FLR PER PLANS | $30,000 |
| 100551515 | 2014-07-22 | Plumbing | 3114 W LAWRENCE AVE | REVISION TO PERMIT # 100531295 TO CHANGE THE PLUMBER OF RECORD TO JIM KWAN KO. | $1 |
| 100540123 | 2014-07-21 | Plumbing | 4750 N WESTERN AVE | RESTAURANT INTERIOR BUILD-OUT PER PLANS | $88,000 |
| 100545238 | 2014-06-12 | Plumbing | 7100 S ASHLAND AVE | PERMIT TO ADDRESS ALL PLUMBING VIOLATIONS: REPAIR ALL PLUMBING VIOLATIONS. GUTTERS. WROUGHT IRON FENCE 5'-8" TALL WOTH 40 LN. FT. ELECTRICAL PERMIT # 100537446 ISSUED 4/23/2014. | $3,200 |
| 100531629 | 2014-04-21 | Plumbing | 7121 S PAXTON AVE | BATHROOM REMODEL | $5,000 |
| 100523288 | 2014-04-09 | Plumbing | 3561 W ARMITAGE AVE | DECONVERT FROM 2 DUS TO 1 DU AND INTERIOR ALTERATIONS TO EXISTING ATTIC AND EXISTNG MIXED-USE BUILDING PER PLANS. **CERTIFIED PLAN CORRECTIONS PROJECT - CONDITIONAL PERMIT: SUBJE | $50,000 |
Fields appear as the issuing authority published them, including spelling and blanks. Scope text is the applicant's description of intended work, not an inspection finding.
Source and limits
Public Chicago permit records through 2026, counted by distinct permit number. This is a historical filing record: it cannot show current backlog, pricing, crew availability, licensing or insurance, and a quiet period may only mean work was filed elsewhere. Confirm anything commercial with the company and with the issuing authority before acting. How we build these records, and what we withhold →