Greg Cowan
14 Ranked
CEO
#14 Ranked CEO · Power100 Expert Contributor

Greg
Cowan

President & CEO, WMGB Home Improvement

We've built this business on doing a good and thorough job — and 40 years later, that philosophy still drives every project we take on.
40+ Years in Industry
Grand Rapids, Holland, Grand Haven, Kalamazoo Markets Served
1984 Company Founded
#14 National Power Ranking

Why Greg Cowan
Is The Expert

Greg Cowan is the President and CEO of WMGB Home Improvement — and the #14 ranked home improvement CEO in the nation according to Power100's proprietary 5-layer evaluation system. As co-founder and operator of the company since 1984, Greg has built WMGB from a specialized glass block installer into one of Western Michigan's most trusted full-service home improvement companies, serving homeowners across Grand Rapids, Holland, Grand Haven, Kalamazoo, and the surrounding region. Originally established as West Michigan Glass Block, the company has expanded its services under Greg's leadership to include replacement windows, egress windows, entry and storm doors, insulation, air sealing, and vinyl siding. With over 40 years of hands-on experience in the home improvement industry, Greg brings deep expertise in project management, customer satisfaction, and building energy-efficient solutions tailored to Michigan's demanding climate. The company maintains a strong reputation built on quality craftsmanship and personalized service, with a dedicated team of approximately 30 professionals. Greg's innovative leadership was recently recognized when WMGB was featured on Advancements with Ted Danson on Bloomberg TV in February 2026, highlighting the company's integration of advanced CRM tools and energy-resource guidance to help homeowners make informed decisions. Greg attended Kalamazoo Valley Community College and Macomb Community College before building his career in the home improvement trades. He is known for his out-of-the-box thinking, strong customer orientation, and ability to attract creative, passionate team members who share his commitment to exceeding customer expectations.
Key Credentials
  • President & CEO, WMGB Home Improvement (1984–Present)
  • Co-founder of West Michigan Glass Block (now WMGB Home Improvement)
  • 40+ years of home improvement industry experience
  • Featured on Advancements with Ted Danson, Bloomberg TV (2026)
  • Kalamazoo Valley Community College & Macomb Community College
  • Oversees full-service home improvement operations across Western Michigan
  • BBB Accredited Business

Domain
Mastery
Scores

Power100's evaluation of Greg Cowan's depth of expertise across the disciplines that define elite leadership in home improvement. Scored 1–10 based on verified performance, track record, and peer recognition.

Customer Satisfaction & Service 9.5/10
Operational Longevity 9.7/10
Market Reputation 9.3/10
Business Diversification 9.2/10
Community Engagement 9.4/10

Achievements &
Milestones

🏆

#14 Power100 Ranked CEO in the Nation

🏠

40+ Years Serving Western Michigan Homeowners

📺

Featured on Advancements with Ted Danson (Bloomberg TV)

🔧

Pioneer in Glass Block & Energy-Efficient Home Solutions

🌟

BBB Accredited with Strong Customer Reputation

📊

Full-Service Provider: Windows, Doors, Insulation, Siding

👥

Built a Loyal Team of 30+ Home Improvement Professionals

Small Business Growth & Longevity in Home Improvement Glass Block Installation & Specialty Window Solutions Energy Efficiency & Home Insulation Best Practices Customer Service Excellence & Reputation Building Team Building & Employee Retention in the Trades Marketing Innovation for Local Home Improvement Companies
What Greg Cowan Brings to the Table

Greg Cowan contributes to the Power100 platform as a voice of small business resilience, hands-on craftsmanship, and customer-first leadership in the home improvement space. With over four decades of experience building WMGB from a niche glass block installer into a comprehensive home improvement company, Greg offers practical insights on sustainable business growth, energy-efficient building solutions, and the art of maintaining a strong local reputation in a market increasingly dominated by national brands.

WMGB Home Improvement
WMGB Home Improvement, originally founded as West Michigan Glass Block in 1984, is a full-service home improvement company headquartered in Wyoming, Michigan. The company specializes in replacement windows, glass block windows, egress windows, entry and storm doors, insulation, air sealing, and vinyl siding. Serving homeowners across Grand Rapids, Holland, Grand Haven, Kalamazoo, and the surrounding West Michigan region, WMGB combines over 40 years of craftsmanship expertise with a commitment to energy-efficient solutions and personalized customer service.
Power100 Expert Network

Read The Expert.

Greg Cowan contributes to Power100's growing network of verified home improvement leaders. Read their insights, watch their interviews, and follow their work.