Constellation Building Systems provides full-service maintenance, design, installation, retrofitting, replacement, building controls, facilities maintenance support, and on-demand service for commercial and industrial HVAC systems. Fully licensed and insured, we supply industry-leading expertise to thousands of owners, contractors, developers, real estate management companies, schools, hospitals, churches, universities, and government facilities throughout Maryland and the District of Columbia.

Our affiliation with Constellation Energy's Projects and Services Group (CEPS) expands the menu of services available to our customers, allowing us to leverage CEPS' superior energy knowledge, engineering expertise, and new technologies in the pursuit of complete customer satisfaction.

From the most basic system maintenance to the most challenging system design and installation, Constellation Building Systems makes sure that every customer's needs are met every step of the way. We painstakingly go over every detail of your project's requirements before handing it off. Our field staff takes full ownership, maintaining constant customer contact to make sure each phase proceeds as envisioned.

We don't stop working until everything works. As projects near completion, our service technicians ensure that all systems operate as designed and in accordance with the manufacturer's - and customer's - specifications.

With extensive experience in HVAC system service, Constellation Building Systems is dedicated to making sure your systems run safely, reliably, and efficiently. We provide comprehensive commercial and industrial service and maintenance agreements customized to address each customer's specific equipment and needs. Customers who take advantage of our flexible, competitive agreements also receive top priority and additional benefits.

Our certified, experienced technicians are available 24/7 to keep service disruption and related costs to a minimum. We take pride in face service response time and customer satisfaction.