Introducing Diversified General Contractors Inc

Commercial HVAC Contractor

Hello everyone, We are a well-renowned HVAC Contractor from Lansing. Since 2000, we have been providing our clients with top of the line mechanical contracting services that cater to their specific needs and requirements. From small projects to larger and more complex jobs, we have experience dealing with all sorts of parameters.  Contact us today to find out how we can help.


Our Projects Portfolio


CTA 95th - Dan Ryan Station

McCormick Place


Broadway High Rise Building

Midway Airport Modernization Project

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PeoplesGas - North Facility


Our Services

Quality Contracting at Competitive Rates

Going Over Data
Air Purifier Installation

Engineering and Constructability

Customized to Your Preferences

Commercial HVAC Installation

It’s All in the Details

Energy Efficiency Solutions

Efficient. Reliable. Exceptional Service.


Proud to be

A Licensed HVAC Contractor with Two Decades of Experience

Diversified General Contractors, Inc. has been serving as a leading HVAC Contractor since 2000. As a fully-certified professional, we are can tackle anything from the most complex and large scale construction projects to smaller jobs. we are fueled by our commitment to excellence and go the extra mile to make sure our clients are completely satisfied with our work.


Larson & Darby Group

Our Engineering Partner

•A full-service architecture, engineering (structural, mechanical, electrical & plumbing), interiors and technology design firm, bring a broad interdisciplinary perspective to the design process. 

•Leveraging the knowledge and expertise of specialists from multiple disciplines informs and enriches each design solution. Mix in a passion for great design and exceptional services that has fueled us for more than five decades and you have a firm that’s uniquely suited to solve your design challenges.

•We honor the legacy of design quality and relationships by engaging our clients as partners, not projects!

•Larson & Darby Group’s diverse portfolio includes work in the following markets: corporate and industrial, academic, civic and cultural, healthcare, multi-family housing, recreation, and retail.



Ice Rinks

Mr. Robert bring over a 35 years experience in design/build of refrigeration systems for ice arenas, joined our team as an ice rink Project Director. Mr. Robert’s extensive background is in: ammonia and halocarbon refrigeration system, installation fusion ice rink piping, dasher boards, ice rink flooring, technical service, energy management and consultation.


Solar Energy


Solar Modules Installation

Customized to Your Preferences

Energy Storage Systems

Efficient. Reliable. Exceptional Service.

Integration of Solar Energy System

It’s All in the Details

Air Conditioner


Send us an email; give Diversified General Contractors Inc a ring to learn more.

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