Business Details
50+ Years
experience
Emergency
services
Trusted Plumbing and Mechanical Services in Chicago
Founded in 1946, Great Lakes Plumbing & Heating has established itself as a trusted leader in commercial plumbing, mechanical systems, and fire protection services. Our family-owned business combines decades of industry experience with cutting-edge technology to deliver reliable, code-compliant solutions tailored to client needs. With a team of certified engineers, project managers, and skilled tradespeople, we prioritize safety, quality, and meticulous project management across all projects. Our commitment to innovation ensures clients benefit from advanced design tools like BIM and prefabrication techniques that streamline installations.Serving the Chicago metropolitan area, we maintain long-term partnerships through 24/7 emergency response, preventive maintenance programs, and transparent communication. Recognized for expertise in complex retrofits and new construction, we serve diverse sectors including healthcare, data centers, and hospitality. Our track record of completing high-profile projects on time and within budget underscores our reputation as a subcontractor of choice. Backed by generations of local knowledge, we remain dedicated to advancing building systems efficiency while upholding the highest standards of client service.
Services
Commercial Plumbing
Mechanical Contracting
Fire Protection Systems
Design/Build Solutions
Emergency Service
System Maintenance
Retrofit Projects
Clean Room Installation
Sprinkler Retrofits
HVAC Systems
Details
- Year established: 1946
Highlights and features
- 75+ years of specialized plumbing and mechanical contracting experience
- 24/7 emergency service with rapid response teams available
- In-house engineering and BIM design capabilities for complex projects
- Certified professionals with expertise in commercial fire protection systems
- Proven track record with major Chicago landmarks and institutions
What people say
Reliable subcontractor
Expertise in complex systems
24/7 emergency support
Long-term partnerships
Timely project delivery
Services
Commercial Plumbing Systems
We design and install commercial plumbing systems with precision engineering and code compliance. Our team handles complex projects from domestic water systems to industrial process piping. With over 75 years of experience, we utilize BIM technology and prefabrication techniques to ensure on-time delivery while maintaining operational continuity for building occupants.
Fire Protection Systems
Our fire protection division specializes in wet/dry sprinkler systems, standpipe installations, and clean agent suppression. Certified engineers ensure compliance with local and national fire codes. We provide comprehensive services including system design, nitrogen generator integration, and 5-year obstruction testing for commercial and industrial facilities across the Chicagoland area.
Mechanical Contracting
We deliver heating, ventilation, and air conditioning solutions for commercial buildings. Our capabilities include medical gas systems, clean room environments, and data center cooling. With specialized expertise in retrofitting existing infrastructure, we minimize tenant disruption while enhancing system efficiency and regulatory compliance for healthcare, education, and industrial clients.
Design/Build Solutions
Our in-house engineering team provides integrated design/build services using Building Information Modeling. This approach enables virtual project visualization and collaborative problem-solving. We manage complex projects from concept to completion, offering tailored solutions for plumbing, fire protection, and mechanical systems in new construction and renovation projects.
Emergency Service
Available 24 hours a day, our service team addresses urgent plumbing, mechanical, and fire protection issues. We provide rapid response for system failures, preventive maintenance plans, and equipment upgrades. With specialized technicians on call, we minimize downtime and ensure continued compliance with safety regulations for commercial properties.
People
George W. Treutelaar
Chairman
Fourth-generation plumbing industry leader with over 40 years of experience guiding strategic growth while maintaining family business values of quality and client service.
Justin Treutelaar
President, Business Development
Third-generation executive driving business strategy and client relationships. Focuses on expanding service capabilities while ensuring adherence to company standards of excellence and innovation.
Matt Treutelaar
President, Operations
Operational leader with 25+ years managing complex mechanical and plumbing projects. Oversees project execution, resource allocation, and implementation of safety protocols across all divisions.
Jerry Graupman
Vice President, Fire Protection
Licensed professional engineer specializing in fire protection systems. Directs technical operations and code compliance for commercial fire safety projects throughout the Midwest region.
Julie Sherby
Vice President, Service
Service division leader with 20 years of experience developing preventive maintenance programs and managing 24/7 emergency response teams for plumbing and fire protection systems.
Questions
What areas do you serve?
We primarily serve the Chicago metropolitan area, including Naperville, Westmont, and Northlake, with capabilities extending to surrounding Illinois regions.
Do you handle emergency repairs?
Yes, our 24/7 service team responds to plumbing, mechanical, and fire protection emergencies with rapid on-site support and problem resolution.
What industries do you specialize in?
We serve healthcare facilities, data centers, educational institutions, hospitality venues, and industrial complexes with tailored mechanical and plumbing solutions.
Can you handle complex retrofit projects?
Yes, we specialize in domestic pump retrofits, sprinkler system upgrades, and mechanical system replacements with minimal operational disruption.
Are you available for design/build projects?
Our in-house engineering team provides integrated design/build services using BIM technology for customized solutions from concept to completion.
What certifications do your technicians hold?
Our team includes certified plumbers, mechanical contractors, and fire protection specialists with ongoing training in the latest industry standards.
