PJ Dionne Company is a commercial plumbing and HVAC contractor serving the greater Boston area since 1991. We perform new construction, renovation and service and maintenance for general contractors and building owners in industries ranging from biotech and government to office and retail. PJ Dionne Company got its start as a small plumbing company and has grown steadily to a team of more than 130 highly skilled service professionals and support staff. We are proud of our reputation for quality across a wide variety of projects – large and small, design and installation, service and maintenance – and our ability to adapt to new customer requirements and technologies.