BBB Accredited Business since

Koh Exterior, Inc.

Phone: (773) 463-7565 Fax: (773) 539-6425 2928 N Campbell Ave, Chicago, IL 60618

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Koh Exteriors is a Chicago exterior design company which specializes in creating and installing windows and doors. Located in Chicago, IL, this company performs work for businesses and residents within Chicago and the surrounding areas, with some work performed out of state, including in Milwaukee, northwest Indiana, and southern Michigan. Family owned and operated, Koh Exteriors started in 2009. Their customers have included Goose Island Brewery, Township Café, Giordano's, Chicago Bagel Authority, and the Old Oak Tap. The builders of Koh Exterior have installed windows all throughout the Chicagoland area.

This company works primarily with glass and doors, including storefront and curtain walls, entrance systems, aluminum windows, sliding doors, glass partition walls, glass shower walls, frameless glass doors, awnings, casements, patio doors, and glass blocks. Their glass partition walls can be built with smoky glass panels for privacy, or clear glass for better insulation of a storefront. They build architectural entrance systems that can include full paneled glass windows with a built-in door, or more traditional wooden doorframes with a glass door.

Special shapes and colors are available for homes or businesses that want a standout glass window or door. All Koh Exterior windows are energy-efficient double-paned aluminum or vinyl windows, with argon gas between the panes to regulate temperature. Free estimates are available.

Visit the website for Koh Exteriors to learn more about the services they provide, view their gallery of completed glass and window projects, and schedule a consultation with a free estimate.

BBB Accreditation

A BBB Accredited Business since

BBB has determined that Koh Exterior, Inc. meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public.

BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services.

Reason for Rating

BBB rating is based on 13 factors. Get the details about the factors considered.

Factors that raised the rating for Koh Exterior, Inc. include:

  • Length of time business has been operating
  • No complaints filed with BBB

Customer Complaints Summary

0 complaints closed with BBB in last 3 years | 0 closed in last 12 months
Complaint Type Total Closed Complaints
Advertising/Sales Issues 0
Billing/Collection Issues 0
Delivery Issues 0
Guarantee/Warranty Issues 0
Problems with Product/Service 0
Total Closed Complaints 0

Customer Reviews Summary Read customer reviews

0 Customer Reviews on Koh Exterior, Inc.
Customer Experience Total Customer Reviews
Positive Experience 0
Neutral Experience 0
Negative Experience 0
Total Customer Reviews 0

Additional Information

BBB file opened: October 25, 1999 Business started: 11/10/2009 Business started locally: 11/10/2009 Business incorporated 11/10/2009 in IL
Type of Entity


Business Management
Mr. Michael Koh, President
Contact Information
Principal: Mr. Michael Koh, President
Number of Employees


Business Category

Windows - Installation & Service Door Frames Doors Doors - Patio Glass - Beveled, Carved, Ornamental Glass - Block Windows Contractors - General Glass - Stained & Leaded Gutters & Downspouts Siding Contractors Finish Carpentry Contractors (NAICS: 238350)

Additional Locations

  • 2928 N Campbell Ave

    Chicago, IL 60618 (773) 463-7565


BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Reviews Rating represents the customers opinions of the business. The Customer Review Rating is based on the number of positive, neutral and negative customer reviews posted that are calculated to produce a score.

Customer Review Experience Value
Positive Review 5 points per review
Neutral Review 3 points per review
Negative Review 1 point per review

BBB letter grades represent the BBB's opinion of the business. The BBB grade is based on BBB file information about the business. In some cases, a business' grade may be lowered if the BBB does not have sufficient information about the business despite BBB requests for that information from the business.

BBB Letter Grade Scale

BBB Rating Value
A+ 5
A 4.66
A- 4.33
B+ 4
B 3.66
B- 3.33
C+ 3
C 2.66
C- 2.33
D+ 2
D 1.66
D- 1.33
F 1
NR -----
Star Rating scale

  Average Score
5 stars 5.00
4.5 stars 4.50-4.99
4 stars 4.00-4.49
3.5 stars 3.50-3.99
3 stars 3.00-3.49
2.5 stars 2.50-2.99
2 stars 2.00-2.49
1.5 stars 1.50-1.99
1 star 0-1.49

BBB Customer Review Rating plus BBB Rating is not a guarantee of a business' reliability or performance, and BBB recommends that consumers consider a business' BBB Rating and Customer Review Rating in addition to all other available information about the business. If the BBB Rating is NR then only Customer Reviews are used for the Star Rating.