Thonus North Plumbing, Heating & Air Conditioning

Thonus North Plumbing, Heating & Air Conditioning is a Harwich-based plumbing and HVAC contractor serving Cape Cod homeowners. The company says it has operated on the Cape since 2009, and reviewers describe Michael Grillo as the owner running day-to-day service alongside a small crew that includes technicians Cam (Cameron) and Dylan. Customers who have hired the company consistently praise fast turnaround on urgent calls — no heat, no hot water, or a failed AC on a hot day are described as being addressed the same day or the next, sometimes ahead of larger competitors quoting weeks-long waits. Multiple reviewers report using the company for five or more years across a range of jobs: water heater and boiler replacement, gas line installation for a whole-house generator, AC and mini-split installs, drain and fixture repairs, and full-bathroom plumbing during a home renovation. Several name specific technicians for clean, well-explained work and note the crew arrives on time and protects the home while working. The company is not a BBB-accredited business but carries an A+ BBB letter grade, and Google shows a 4.8-star average from 82 ratings. Most of the detailed written reviews match that pattern — specific, first-hand accounts spanning 2021 through 2026 rather than generic praise. Two older one-star reviews (2023) are worth asking about directly: one alleges sub-par work and used equipment on an install along with an unresponsive, confrontational exchange with the owner; the other describes volatile behavior from ownership and a billing dispute that reportedly involved the police. A more recent (2026) review describes being charged extra after questioning a missing filter from an earlier installation. None of these are corroborated elsewhere in the record, but homeowners considering a larger project may want to ask directly about warranty terms, equipment sourcing, and how billing disputes are handled. One more thing worth confirming before hiring: a Massachusetts license record tied to the number the company's site lists for its Master Plumbing credential is registered to a different individual, not the business's known owner — worth verifying directly with the state rather than assuming it covers this company. Thonus North has built a long, well-documented track record of responsive, detailed plumbing and HVAC service for Cape Cod homeowners, alongside a small number of serious but isolated complaints and a licensing detail that deserves a direct check before booking larger work.