In service since 1954, Jarrell Contracting is a single-source mechanical contractor dedicated to providing quality service and value to every project. Our design build team offers reliable and cost-effective designs for these projects. Read more on how Jarrell Contracting is engineering your changing environment.

Design Build

Case Studies

The Fox Tower

When the Pandemic hit, Jarrell’s Sales Engineers and Service providers reached out to their customers, both current and past, in a concerted effort to keep things running and assist in helping ease the problems these [...]

More Case Studies

Our History

Jarrell is a full-service mechanical contractor. In our business, relationships are everything and we have been very fortunate to make a lot of friends since our founding in 1954. We are consistently among the top 100 largest mechanical contractors in the country. We’ve been listed as the second largest mechanical contractor in the St. Louis area for the past seven years by the St. Louis Business Journal. Our success is due to our emphasis on relationships and putting our customers’ needs first.

We take pride in the high level of customer satisfaction we continually achieve and hope that we have the opportunity to provide all your mechanical contracting needs. After all, you can never have too many friends.

Learn More About Our History


“BSI Constructors has counted on Jarrell to deliver quality HVAC systems on many of our most significant projects. Jarrell has an outstanding design team that consistently delivers the right combination of quality, first cost, and energy efficiency that best serves our clients. Jarrell’s field management is consistently strong. Most important, the Jarrell’s operate their business with the highest degree of integrity and are always true to their word.”
Paul Shaughnessy, President, BSI Constructors
“When I think of Jarrell, the words ‘Trustworthy, Quality and Design-Build Expert’ immediately come to mind. HBD has relied on Jarrell’s expertise for over 40 years and three generations of ownership, and continues to do so.”
Michael J. Perry, President, HBD Construction, Inc.
“The Team at Jarrell is one of the best I have worked with in my 25 years at Korte and almost 30 years in the design and construction business. The spirit of true partnering permeates the organization, from the President, Michael Jarrell, Sr. to business development, engineering, estimating, field production, to commissioning and callback. The Jarrell family has developed a first class organization of professionals dedicated to project success. We expect the best from our teammates. Jarrell has always met our expectations.”
Michael L. Tubbs, Senior V.P./Project Executive, The Korte Company
“Jarrell Contracting has been a tremendous asset to our firm. LCS’s main objective is to provide high quality projects that stand the test of time. Partnering with Jarrell aids in our ability to do just that. Their dedication to the project objectives, loyalty to the project team, and most importantly the quality of the workmanship and products used speaks volumes to why they are a leader in this industry. Their extensive experience allows the project team to have the seamless ability to collaborate and problem solve thus keeping the progress of the project moving forward. Whether or not you are looking for HVAC or Plumbing, there is not another contractor that will provide the level of service or quality like they will.”
Steve Layne, Layneco Construction
“Jarrell Contracting shares NSC Applied Products Group’s passion for customer service. That is evident in their extreme attention to detail in engineering and pre-planning for a project such as St. Roch Parish School. This is matched with their talented project management, field management and service technician group that diligently works through issues that are always present in the world of commercial construction.”
“I have worked on numerous school projects: the one thing that cannot change is the first day of school. Jarrell did an amazing job of working on a tight summer schedule, while maintaining quality and excellence. “
John Berglund, St. Roch School
“The difference that a comfortable climate makes in a school setting is remarkable. Student learning is up while discipline issues are down. The teachers’ productivity is higher as is the morale of both students as well as staff. I cannot thank Jarrell Contracting enough for their outstanding work this summer in installing our AC/HVAC system. From the beginning of the project until its timely completion, we received efficient and courteous service. The people at Jarrell Contracting are truly professional tradespeople who I would recommend to anyone.”
Mosignor Sal Polizzi, Dr. Mark Gilligan, & John Berglund, St. Roch Parish