COMPANY RECORD · CHICAGO, IL
Walden Technical Services,Inc. — permit history in Chicago, IL
Walden Technical Services,Inc. appears on 223 Chicago permit records from 2017 through 2025, most often electrical (96.9% of the record).
Permit categories
| Category | Permits | Share |
|---|---|---|
| Electrical | 218 | 96.9% |
| General construction | 7 | 3.1% |
2 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.
Activity by year
| Year | Permits issued |
|---|---|
| 2017 | 49 |
| 2018 | 72 |
| 2019 | 26 |
| 2020 | 23 |
| 2021 | 12 |
| 2022 | 22 |
| 2023 | 13 |
| 2024 | 3 |
| 2025 | 5 |
Busiest year on record: 2018, with 72 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 |
|---|---|---|
| Kerr Construction | 13 | 2021-10-20 |
| A1 Quality Builders & Developers Inc | 10 | 2018-11-01 |
| Rfn Consulting LLC | 6 | 2025-06-06 |
| South Shore Builders LLC | 6 | 2018-05-22 |
| Rogers Contracting Solutions Inc | 6 | 2020-05-19 |
| Batiste Masonry | 6 | 2023-02-28 |
| Sci Tech, Inc. | 4 | 2023-09-14 |
| G. G. Tuckpointing, Inc. | 4 | 2021-10-20 |
| Kerr Construction Services LLC | 4 | 2023-02-28 |
| Taty Construction, Inc | 3 | 2025-03-07 |
| Djh, Inc. | 3 | 2019-04-22 |
| Ghb Construction LLC | 2 | 2022-07-29 |
35 companies are named alongside Walden Technical Services,Inc. 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 |
|---|---|
| 4209 N MOZART ST | 2025-12-02 |
| 8411 S CREGIER AVE | 2025-06-06 |
| 5715 S MAY ST | 2025-03-07 |
| 2857 S HAMLIN AVE | 2025-02-20 |
| 7111 S NORMAL BLVD | 2025-02-11 |
| 2605 W 79TH ST | 2024-11-07 |
| 940 W CASTLEWOOD TER | 2024-09-03 |
| 6411 S EVANS AVE | 2024-06-08 |
| 7938 S ESSEX AVE | 2023-11-20 |
| 1438 W 62ND ST | 2023-09-14 |
| 656 W 115TH ST | 2023-08-02 |
| 423 W 99TH PL | 2023-08-02 |
| 2468 N CLARK ST | 2023-07-31 |
| 6328 S LAFLIN ST | 2023-05-09 |
189 distinct addresses on record; the 14 most recent are shown. Declared value on record runs from $1 to $350,000, median $7,500. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.
Permits on record
223 permits; open the 50 most recent
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| B200452741 | 2025-12-02 | Electrical | 4209 N MOZART ST | LINE VOLTAGE ELECTRICAL WORK. NEW PERMANENT 200 AMP SERVICE DISCONNECTING MEANS WITH 12 CIRCUITS. RECEPTACLE OUTLETS: 1 . LIGHTING OUTLETS: 0. SPECIFIC LOCATION: BASEMENT. | $4,000 |
| 101062134 | 2025-06-06 | Electrical | 8411 S CREGIER AVE | PROPOSED 2 STORY REAR PORCH/STAIRS. 6' SIDE WOOD FENCE, AND INTERNAL RENOVATIONS IN AN EXISTING 3 STORY/3 UNIT RESIDENCE, PER PLANS. | $85,000 |
| 101066039 | 2025-03-07 | Electrical | 5715 S MAY ST | SELF-CERT 2019 CBRC: INTERIOR REMODEL OF EXISTING 2-STORY, TYPE IIIA MASONRY, 26' HT., 2-UNIT RESIDENTIAL BUILDING WITH BASEMENT AND DEMOLITION OF EXISTING ENCLOSED REAR PORCH FOR | $160,000 |
| 101060525 | 2025-02-20 | Electrical | 2857 S HAMLIN AVE | SPR 2019 CBRC - GULL GUT REHAB AND ALTERATION TO FLOOR LAYOUT AND 1000 SF FRAME ADDITION TO AN EXISTING 2 FLAT FRAME RESIDENCE, WITH NEW WOOD REAR EXTERIOR STAIRWAY (OCCUPANCY GROU | $150,000 |
| 101059558 | 2025-02-11 | Electrical | 7111 S NORMAL BLVD | PROPOSED NORTH/SOUTH REAR 3 STORY STAIRS, 6 SPACE PARKING PAD, AND INTERNAL REMODELING IN AN EXISTING 3 STORY/6 UNIT RESIDENCE W/BASEMENT, PER PLANS. | $275,000 |
| B200404385 | 2024-11-07 | Electrical | 2605 W 79TH ST | LINE VOLTAGE ELECTRICAL WORK. REPAIR OR ALTER DEVICES ON EXISTING CIRCUITS. RECEPTACLE OUTLETS: 35 . LIGHTING OUTLETS: 15. SPECIFIC LOCATION: INTERIOR STORE. | $1,650 |
| B101059045 | 2024-09-03 | Electrical | 940 W CASTLEWOOD TER | REPLACE OUTLETS, SWITCHES, AND LIGHT FIXTURES INSIDE THE HOUSE. REPLACE EXISTING OUTDOOR LIGHT FIXTURES AND OUTDOOR OUTLETS. | $2,500 |
| B101052990 | 2024-06-08 | Electrical | 6411 S EVANS AVE | REPOSITION RISER ON 3FLAT BUILDING TO ALLOW FOR PORCH REPAIRS | $1,000 |
| 101029826 | 2023-11-20 | Electrical | 7938 S ESSEX AVE | SC 2019 CBRC: ALTERATIONS TO ALL EXISTING APARTMENTS AND COMMON AREAS IN 3 STORY 6 UNIT APARTMENT BUILDING, NO ADDED BULK, FOOTPRINT OR HEIGHT (OCCUPANCY GROUP R-2; TYPE IIIA CONS | $125,000 |
| 101021029 | 2023-09-14 | Electrical | 1438 W 62ND ST | SPR 2019 CBC REVISION TO PERMIT #100943713 TO ADD IN (1)FURNACE FOR THE BASEMENT(CONSTRUCTION TYPE IIIA, OCCUPANCY R5) | $50,000 |
| B101026431 | 2023-08-02 | Electrical | 656 W 115TH ST | REPAIR AND REPLACE OUTLETS, SWITCHES, AND LIGHT FIXTURES. INSTALL NEW COVER PLATES. | $1,000 |
| B101026430 | 2023-08-02 | Electrical | 423 W 99TH PL | REPAIR AND REPLACE ALL OUTLETS, SWITCHES, AND LIGHT FIXTURES. INSTALL NEW COVER PLATES. | $1,000 |
| 101022216 | 2023-07-31 | Electrical | 2468 N CLARK ST | SC 2019 CBRC:BUILDOUT NEW CARRY-OUT RESTAURANT IN EXISTING GROUND FLOOR COMMERCIAL TENANT SPACE (810 SF)WORK, INCLUDES; NEW SALES COUNTER, KIT HOOD WITH COOKING EQUIPMENT & SMALL W | $40,000 |
| B101016096 | 2023-05-09 | Electrical | 6328 S LAFLIN ST | UPGRADE ELECTRIC SERVICE. 100A SERVICE, NEW METER SOCKET, RISER, WEATHERHEAD, AND GROUND. | $1,000 |
| 101002624 | 2023-04-11 | Electrical | 6359 S HERMITAGE AVE | INTERIOR RENOVATION INCLUDING FRONT AND REAR PORCHES AS PER PLANS | $95,000 |
| B101011636 | 2023-04-04 | Electrical | 11802 S HALE AVE | INSTALL NEW OUTLETS AND SWTCHES THROUGHOUT HOUSE. NO ADDITIONAL BRANCH CIRCUITS. INSTALL NEW 100A SERVICE. | $2,500 |
| B101011635 | 2023-04-04 | Electrical | 10818 S SANGAMON ST | INSTALL NEW OUTLTS AND SWITCHES THROUGHOUT HOUSE. NO ADDITIONAL BRANCH CIRCUITS OR MODIFICATIONS. | $1,500 |
| B101011633 | 2023-04-04 | Electrical | 10821 S SANGAMON ST | INSTALL NEW OUTLETS AND SWITCHES THROUGHOUT HOUSE. NO ADDITIONAL BRANCH CIRCUITS OR MODIFICATIONS. | $1,500 |
| 100992755 | 2023-02-28 | Electrical | 7538 S DOBSON AVE | SPR 2019 CBRC - INTERIOR/EXTERIOR RENOVATION TO AN EXIST. TWO STORY 2 UNITS MULTI-DWELLING FRAME RESIDENCE. REBUILD EXIST. REAR SECTION OF BUILDING PER PLAN. NEW 2 STORY REAR ADDIT | $90,000 |
| B101006749 | 2023-02-27 | Electrical | 2031 N HOYNE AVE | CHANGE OF CONTRACTOR FROM PERMIT #100977483. NO SERVICE WORK NEEDED. ORIGINAL 200A SERVICE REMAINS IN PLACE. OUTLETS IN BASEMENT WERE MOVED UP 6 INCHES AFTER THE BASEMENT FLOODED. | |
| B101003658 | 2023-01-27 | Electrical | 2665 W NELSON ST | COMPLETE ELECTRIC BUILD. RESTORE FIRE DAMAGED PROPERTY TO ORIGINAL CONDITION. 100A SERVICE, 30 POSITION BREAKER PANEL. | $16,500 |
| 100994427 | 2022-12-19 | Electrical | 130 E 51ST ST | OIA '118 E 51ST ST' SELF-CERT 2019 CBRC: INTERIOR BUILD OUT FOR NEW RESTAURANT AS PER PLANS (OCCUPANCY ASSEMBLY GROUP (A-2); TYPE IIIA CONSTRUCTION) | $156,000 |
| B100994900 | 2022-11-01 | Electrical | 6328 S EVANS AVE | CHANGE OF ELECTRIC CONTRACTOR. ORIGINAL PERMIT #100974766. COMPLETE ELECTRIC BUILD ON A 3-FLAT BUILDING ACCORDING TO DRAWINGS. CHANGE SERVICE FROM 400A, 4 METER, TO 200A, 4 METER. | |
| B100992261 | 2022-10-12 | Electrical | 6359 S HERMITAGE AVE | RESTORE VANDALIZED ELECTRIC TO ORIGINAL CONDITION. EXISTING 100A SERVICE WITH 3 METER SOCKETS, 2 DWELING UNITS AND A PUBLIC BREAKER PANEL. INSTALL NEW WIRE AND DEVICES IN EXISTING | $6,000 |
| 100970606 | 2022-10-11 | Electrical | 7246 S EVANS AVE | "SPR 2019 CBC" INTERIOR REHAB OF AN EXISTING 2 UNIT BLDG W/ BASEMENT: NEW DRYWALL AT PARTITIONS, NEW ELEC SERVICE, NEW MECH AND PLUMB SYSTEM AS PER PLAN.(CONDITIONAL PERMIT SUBJEC | $65,000 |
| 100932765 | 2022-09-26 | Electrical | 1743 W 107TH ST | PROPOSED ATTACHED FRONT 1 CAR GARAGE W/DRIVEWAY, REAR 2ND FLOOR ADDITION, SIDE BALCONY, REAR DECK, INTERIOR RENOVATIONS FOR EXISTING 2 STORY SFR, PER PLANS. | $50,000 |
| 100932491 | 2022-08-26 | Electrical | 1514 E 72ND ST | INTERIOR RENOVATION AND WOOD PORCH REPLACEMENT IN SAME LOCATION TO AN EXIST. 2-STORY 2 UNIT MULTI-DWELLING BRICK BUILDING W/. BASEMENT.(WORK WAS COMPLETED WITHOUT A PERMIT. THESE D | $85,000 |
| B100985406 | 2022-08-22 | Electrical | 3008 E 81ST ST | INSTALL BRANCH CIRCUITS FOR 2 AC UNITS. INSTALL RECESSED LIGHTING IN EACH DWELLING UNIT. | $2,000 |
| B100984660 | 2022-08-17 | Electrical | 629 N SPRINGFIELD AVE | CHANGE OF CONTRACTOR. REPLACES PERMIT NUMBER 100957121. COMPLETE ELECTRIC BUILD ON A SINGLE FAMILY RESIDENCE INCLUDING NEW 100A SERVICE. | |
| B100983143 | 2022-08-04 | Electrical | 3845 N KENMORE AVE | CHANGE OF CONTRACTOR. THIS PERMIT REPLACES #100860428 AND #100974856. UPGRADE EXISTING 200A, 2 METER SERVICE INSTALL TO 400A, 5 METER SERVICE TO ACCOMMODATE FOUR DWELLING UNITS. | |
| B100982834 | 2022-08-02 | Electrical | 2140 N WINCHESTER AVE | UPGRADE EXISTING 100AMP SERVICE TO 200AMP. INSTALL DEDICATED 240V/60A CIRCUIT FOR EV. INSTALL DEDICATED 240V/30A CIRCUIT FOR DRYER. | $3,000 |
| 100965669 | 2022-07-29 | Electrical | 7606 S LUELLA AVE | SPR, OCCUPANCY R-5 SFR, CONSTRUCTION TYPE IVA, INTERIOR RECONFIGURATION & BASEMENT BUILD OUT INCLUDING ELECTRICAL, PLUMBING & MECHANICAL PER PLANS. | $70,000 |
| B100978258 | 2022-06-30 | Electrical | 8411 S CREGIER AVE | UGRADE SERVICE FROM 100 AMP, 3 METER, TO 200AMP, 4 METER. INSTALL PUBIC PANEL AND SEPARATE PUBLIC CIRCUITS. CONNECT PUBLC CIRCUITS TO PUBLIC PANEL. | $4,500 |
| B100973889 | 2022-05-27 | Electrical | 7822 S MARQUETTE AVE | CORRECT ELECTRIC VIOLATIONS | $2,000 |
| B100972963 | 2022-05-24 | Electrical | 11250 S FAIRFIELD AVE | INSTALL NEW 100AMP SERVICE, 3 METERS WITH SHUT OFF SWITCHES, INSTALL THREE NEW BREAKER PANELS, WATER GROUND, AND SUPPLEMENTAL GROUND ROD | $3,000 |
| B100971508 | 2022-05-12 | Electrical | 4253 W WILCOX ST | INSTALL NEW 100A SERVICE WITH 3 METER SOCKETS, 2 DWELLING UNITS AND PUBLIC, 3 BREAKER PANELS, AND GROUND WIRE. REPLACES PERMIT NUMBER 100382245 | $4,500 |
| 100951856 | 2022-04-11 | Electrical | 9130 S LAFLIN ST | PROPOSED 2 BASEMENT UNITS (PER ADU ORDINANCE) FOR EXISTING 3 STORY/6 UNIT BUILDING, PER PLANS. **CERTIFIED PLANS CORRECTIONS: CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS ** | $50,000 |
| 100945401 | 2022-04-04 | Electrical | 8007 S AVALON AVE | INTERIOR RENOVATION TO AN EXIST. 1.5 STORY SINGLE FAMILY FRAME RESIDENCE W/. BASEMENT.NEW MECHANICAL, ELECTRICAL AND PLUMBING. | $70,000 |
| B100964646 | 2022-03-29 | Electrical | 7152 S UNIVERSITY AVE | INSTALL NEW 100A SERVICE, 3 METER SOCKETS, 3 PANELS, FOR 2 DWELLING UNITS AND PUBLIC. INSTALL NEW SWITCHES AND OUTLETS, ADD SMOKE DETECTORS AND CARBON MONOXIDE DETECTORS. | $3,000 |
| 100933992 | 2022-03-23 | Electrical | 7315 S DORCHESTER AVE | RT-4 - SPR 2019 CBCINTERIOR/EXTERIOR RENOVATION TO AN EXIST. 2-STORY MULTI-FAMILY 2 UNIT FRAME RESIDENCE W/. BASEMENT. NEW MECHANICAL, ELECTRICAL AND PLUMBING | $90,000 |
| 100961969 | 2022-03-10 | General construction | 4540 W JACKSON BLVD | REVISION TO PERMIT # 100846376 CHANGE OF GENERAL CONTRACTOR TO WALDEN TECHNICAL SERVICES. | $1 |
| B100956936 | 2022-01-29 | Electrical | 6716 S INDIANA AVE | VERIFY METER SOCKET UPGRADE (FROM 2 GANG TO 3 GANG) HAS BEEN INSTALLED CORRECTLY. FIX ANY PROBLEMS WITH THE INSTALLATION. MAKE SURE WATER GROUND IN BONDED CORRECTLY TO THE THREE PA | $1,000 |
| 100943713 | 2022-01-18 | Electrical | 1438 W 62ND ST | SPR 2019 CBRC INTERIOR RENOVATION OF EXISTING TWO DWELLING UNIT TO DUPLEX FIRST FLOOR WITH BASEMENT AND NEW REAR OPEN WOOD PORCH AT EXISTING TWO-STORY BRICK BUILDING WITH BASEMENT | $50,000 |
| 100944707 | 2021-11-22 | Electrical | 8111 S SANGAMON ST | SELF-CERT 2019 CBRC: DUPLEX OF FINISHED BASMEMENT WITH FIRST FLOOR UNIT 1, AND INTERIOR RENOVATION AS PER PLANS (OCCUPANCY R-5; TYPE IIIB CONSTRUCTION). | $110,000 |
| B100946478 | 2021-10-28 | Electrical | 8047 S PEORIA ST | REWIRE ENTIRE PROPERTY, REPLACE ALL SWITCHES AND OUTLETS, INSTALL ALL NEW FIXTURES. ADD 6 BRANCH CIRCUITS. | $2,000 |
| 100935861 | 2021-10-20 | Electrical | 8418 S DREXEL AVE | INTERNAL RENOVATIONS AT EXISTING 3 STORY/3 UNIT BUILDING W/BASEMENT, PER PLANS.(CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS) | $165,000 |
| B100936492 | 2021-08-22 | Electrical | 6546 S EVANS AVE | CHANGE OF ELECTRIC CONTRACTOR. REPLACES ORIGINAL PERMIT #100704504 AND REINSTATEMENT PERMIT #100850738. | |
| B100934589 | 2021-08-09 | Electrical | 8047 S PEORIA ST | UPGRADE SERVICE FROM 100A TO 200A. CHANGE METER SOCKET FROM 2 POSITION TO 3 POSITION. ADD A PUBLIC BREAKER PANEL. SEPARATE PUBLIC ELECTRIC FROM 1ST FLOOR ELECTRIC. | $2,000 |
| B100934799 | 2021-08-09 | Electrical | 1132 S WABASH AVE | INSTALL 15 CAT6 DATA COMMUNICATION CABLES IN UNIT 606 | $1,000 |
| 100924699 | 2021-06-24 | Electrical | 5731 N ROCKWELL ST | SELF-CERT 2019 CBC: INTERIOR RENOVATION ON FLOORS 1 AND 2 FOR SINGLE FAMILY RESIDENCE WITH BASEMENT AND DORMER RENOVATION (OCCUPANCIES R-5; CONSTRUCTION TYPE IIIB). | $150,000 |
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 2025, 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 →