| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| NORSTAR HEATING & COOLING INC | Business | 184004217-0002 | ROCKFORD | NOT RENEWED | Verify |
| NORTECH ENGINEERING INC | Business | 184003067-0002 | CHICAGO | NOT RENEWED | Verify |
| NORTH BRANCH DESIGN PLLC | Business | 184009558-0001 | CHICAGO | ACTIVE | Verify |
| NORTH CENTRAL LAND SURVEY CO INC | Business | 184005997-0008 | BEACH PARK | ACTIVE | Verify |
| NORTH POINT ENGINEERING INC | Business | 184001376-0002 | SPRING GROVE | NOT RENEWED | Verify |
| NORTH SHORE ENGINEERING, PLLC | Business | 184008522-0002 | WAUKEGAN | NOT RENEWED | Verify |
| NORTH SHORE SURVEY LTD | Business | 184006982-0008 | LIBERTYVILLE | NOT RENEWED | Verify |
| NORTHBROOK ENGINEERING CO PC | Business | 184003759-0002 | NORTHBROOK | NOT RENEWED | Verify |
| NORTHERN ILLINOIS SURVEY INC | Business | 184001254-0010 | WAUKEGAN | NOT RENEWED | Verify |
| NORTHERN WEATHERMAKERS HVAC INC | Business | 184000981-0002 | NORTHBROOK | NOT RENEWED | Verify |
| NORTHLIGHT ARCHITECTS | Business | 184003373-0001 | CHICAGO | NOT RENEWED | Verify |
| NORTHLIGHT ARCHITECTS LLC | Business | 184006147-0001 | CHICAGO | ACTIVE | Verify |
| NORTHWATER LLC | Business | 184006487-0002 | SPRINGFIELD | NOT RENEWED | Verify |
| NORTHWESTERN ENGINEERING CONSULTANTS PC | Business | 184002695-0010 | PALATINE | ACTIVE | Verify |
| NORTHWORKS ARCHITECTS & PLANNERS LLC | Business | 184004976-0001 | CHICAGO | ACTIVE | Verify |
| NORWEST SURVEYING SERVICES INC | Business | 184004159-0008 | MORRISON | NOT RENEWED | Verify |
| NORWOOD ENGINEERING LTD | Business | 184004843-0002 | CHICAGO | NOT RENEWED | Verify |
| NOTTINGHAM HOMES LLC ARCHITECTS AND BUILDERS | Business | 184003517-0001 | BLOOMINGDALE | NOT RENEWED | Verify |
| NOTTINGHAM STUDIOS PC | Business | 184007493-0001 | ORLAND PARK | ACTIVE | Verify |
| NOVA DESIGN BUILD INC | Business | 184006975-0001 | NORTHBROOK | ACTIVE | Verify |
| NOVA ENGINEERING PC | Business | 184003055-0002 | LANSING | ACTIVE | Verify |
| NOVAK ARCHITECTURE LLC | Business | 184006145-0001 | CHICAGO | NOT RENEWED | Verify |
| NOVEL ARCHITECTS PC | Business | 184004342-0001 | GLEN ELLYN | NOT RENEWED | Verify |
| NTRIVE LTD | Business | 184007218-0003 | NAPERVILLE | NOT RENEWED | Verify |
| NUSHU LLC | Business | 184007002-0001 | CHICAGO | CLOSED | Verify |
| NW CONSULTING ENGINEERS LLC | Business | 184004978-0002 | ELGIN | NOT RENEWED | Verify |
| NWS ARCHITECTS INCORPORATED | Business | 184000382-0001 | CHICAGO | ACTIVE | Verify |
| O'BRIEN LAND SURVEYING INC | Business | 184003366-0008 | ROUND LAKE | NOT RENEWED | Verify |
| O'BRYAN CONSULTING INC | Business | 184002392-0002 | EDWARDSVILLE | NOT RENEWED | Verify |
| O'CONNOR ENTERPRISES INC | Business | 184004580-0008 | CARY | NOT RENEWED | Verify |
| O'DONNELL WICKLUND PIGOZZI AND PETERSON, INC. | Business | 184000339-0007 | CHICAGO | CANCELLED | Verify |
| O'HARE LEAD ENGINEERS | Business | 184005373-0006 | CHICAGO | CANCELLED | Verify |
| O'HARE MODERNIZATION PARTNERS | Business | 184003818-0002 | CHICAGO | NOT RENEWED | Verify |
| O'HARE RUNWAY DESIGNERS LLC | Business | 184004162-0002 | CHICAGO | NOT RENEWED | Verify |
| O'HARE WEST TERMINAL CONSULTANTS | Business | 184005428-0002 | CHICAGO | NOT RENEWED | Verify |
| O'HIGGINS AND ARNOLD SUSTAINABILITY LLC | Business | 184006789-0002 | SUGAR GROVE | ACTIVE | Verify |
| O'KELLY KASPRAK LLC | Business | 184006469-0001 | CHICAGO | ACTIVE | Verify |
| O'RILEY OFFICE LLC | Business | 184008192-0001 | CHICAGO | ACTIVE | Verify |
| O&N ENGINEERING-DEVELOPMENT PC | Business | 184003597-0002 | WEST CHICAGO | ACTIVE | Verify |
| OAK CREEK ASSOCIATES INC | Business | 184003903-0002 | ST CHARLES | NOT RENEWED | Verify |
| OATES ASSOCIATES INC | Business | 184001115-0014 | COLLINSVILLE | ACTIVE | Verify |
| OBORA & ASSOCIATES | Business | 184007627-0001 | CHICAGO | ACTIVE | Verify |
| OBORA PHILLIPS & ASSOCIATES LLC | Business | 184002581-0001 | CHICAGO | NOT RENEWED | Verify |
| OBRA REAL ESTATE SERVICES, PLLC | Business | 184009227-0001 | BERWYN | ACTIVE | Verify |
| OBRAWERKS | Business | 184007629-0001 | PARK RIDGE | NOT RENEWED | Verify |
| OBRIEN & ASSOCIATES INC | Business | 184000134-0002 | ARLINGTON HEIGHTS | NOT RENEWED | Verify |
| OBUCHOWSKI GROUP INC | Business | 184000570-0001 | CHICAGO | NOT RENEWED | Verify |
| OCGG ARCHITECTS LTD | Business | 184003979-0001 | NORTHBROOK | NOT RENEWED | Verify |
| ODA CONSULTING LLC | Business | 184005602-0001 | CHICAGO | NOT RENEWED | Verify |
| ODIN ARCHITECTS | Business | 184003949-0001 | CHICAGO | NOT RENEWED | Verify |