Safety
We are dedicated to ensuring the well-being of our employees, clients, and the communities in which we work.
Need Service?
P.J. Dionne Company takes pride in responding in a timely manner to your service needs.We Get the Job Done
P.J. Dionne Company serves the commercial plumbing and HVAC needs of public and private organizations across the Greater Boston area.
HVAC
We specialize in hospital, life science, and institutional projects and can offer custom solutions for any HVAC project.
Plumbing
P.J. Dionne Company began as a plumbing company and plumbing still comprises the majority of our work.
Pre-Construction
Streamlining project initiation includes schematic designs, narratives, and final construction documentation.
BIM / Pre-Fab
We’ve expanded our use of BIM to determine optimal design and prevent conflicts before they happen.
Service & Maintenance
We address immediate issues, identify performance limitations, and offer cost-effective solutions.
Careers
We foster a collaborative atmosphere where camaraderie, professional growth, and reflection thrive.Located just north of Boston, P.J. Dionne Company has been a trusted name in commercial plumbing and HVAC services since its founding in 1991. Starting as a small plumbing company, we've grown into a dynamic team of skilled service professionals and dedicated support staff. Our journey from humble beginnings to a leading contractor in the greater Boston area reflects our commitment to excellence and customer satisfaction.
Join Our TeamLatest Projects
William E. Carter School
Boston, MA
100 CambridgeSide
Cambridge, MA
26 Court Office Renovation
Boston, MA
51 Melcher Street
Boston, MA
Boston Public Schools Bathroom Renovations
Boston, MA
Carlson Crossing West
Framingham, MAOur Clients Say...
P.J. Dionne’s HVAC Division is an exceptional firm to work with. Their team's depth of knowledge and commitment to excellence ensure every aspect of their service is executed with precision and care. From initial consultation to installation and maintenance, P.J. Dionne consistently demonstrates expertise, partnership, and concern for end user needs.
Greg Lusky | Senior Project Manager
Leggat McCall Properties
As Consulting Engineers, it is always a pleasure to collaborate with P.J. Dionne on projects we have designed. They work hard to maintain the integrity of the design with professionalism and impeccable workmanship.
Anthony Petrillo, CPD | Plumbing/FP Dept. Head
Cosentini Associates - A Tetra Tech Company
As part of the leadership team of a third-generation family-owned business; trust, support, and loyalty are the foundational building blocks of the enduring relationships that we have built with our Clients and our Partners.