E M Duggan Inc

E.M. Duggan is a Canton, Massachusetts mechanical contractor that traces back to 1891 — ENR New England describes it as a fifth-generation, family-run outfit, and named it its 2022 Specialty Contractor of the Year. On Google it runs 4.2 stars across 72 ratings, and the calls people bring it in for are squarely mechanical: HVAC installs and repairs, rooftop units, sprinkler and fire-protection work, plus general plumbing. The stories worth remembering are the big, memorable calls. When a rooftop heating unit at a Canton preschool stopped igniting during a cold snap, a January 2025 review describes a Duggan technician driving to multiple stores hunting down a replacement part and getting the building warm again within days. In a January 2023 review, another customer says Duggan's technician correctly traced a ductless system's cooling problem to the thermostat after a competing company had recommended replacing the whole unit. A few commercial clients describe relationships running roughly a decade — a local construction-firm owner and a facilities contact among them. The complaints follow a recognizable shape. Across reviews from 2021 through 2025, several customers describe diagnostic and service-call charges that balloon well past the original estimate — one says a $230 tune-up became roughly $1,000 in add-ons, another reports a flat $915 charge just to send someone out. A November 2025 review describes a simple thermostat request turning into a full diagnostic that required opening a bathroom ceiling, only to be told afterward the thermostat alone would have fixed it. Two reviews from August 2025 describe a sprinkler-system job that left a building with active leaks and water damage, with Duggan then quoting hundreds of dollars just to come assess the damage. Its Massachusetts plumbing license, last checked against the state registry, shows expired. Duggan reads like a mechanical contractor built for bigger commercial and recurring-service work — sprinkler systems, rooftop units, mini splits — more than a small plumbing house. Before booking, especially for an unscheduled or emergency visit, it's worth pinning down the diagnostic fee and what a "minimum" service call actually covers.