R. Maggio & Son Contractors, Derro Construction Co.

R. Maggio & Son has deep roots in Winchester: Ronald Maggio started the business full time in 1975, his son Ronald Jr. joined in 2011, and in 2016 the family acquired Derro Construction, a local firm that had been operating since 1918. Today it's a family-run outfit doing basement waterproofing, drainage, masonry and landscaping work, co-owned by Ronald Jr. and Janet. There isn't much of a written record yet — just two reviews turn up, both detailed and both about water problems. A 2024 review describes a basement waterproofing system Ronny and his team installed, walking the homeowner through the process at each step. A 2023 review says the crew responded quickly when a sump pump failed, swapping it out before the basement could flood. BBB's page for the business lists four separate Massachusetts trade licenses — a construction supervisor's license, a home improvement license, a hoisting engineer license, and even a real estate broker license — though that's BBB's own listing rather than something checked against the state directly. For basement water problems specifically, the two accounts on file and a century-plus of combined company history between the two merged firms make this worth a call, though it's worth asking for more recent references given how few reviews exist.