Guaranteed Builders & Developers, Inc.

Guaranteed Builders & Developers, which trades as GBI-Avis, builds its homes in its own factory. The Douglas company manufactures and delivers customized modular homes, garages and additions across Massachusetts, Connecticut, New Hampshire and Rhode Island. It keeps a model-home display lot on Route 16 and handles site, septic and demolition work itself. The company says it has been doing this for over 35 years and calls itself family owned and operated. BBB gives a 1976 start date, names James Tusino as president, and lists Ben's Container & Rubbish Service among its trade names. BuildZoom's Connecticut permit history for the company includes garages and a two-story addition in Thompson and North Grosvenordale. Its Massachusetts home improvement contractor registration, #103793, is active on the state registry, and BBB also lists construction supervisor licence CS-024931. BBB has accredited the business since 1992 and grades it A+. An April 2026 Massachusetts Lawyers Weekly article, "Zoning battle ends with demolition after 17-year dispute," quotes counsel for the town of Douglas.