Direct Answer
To hire a reliable commercial glass & curtain wall installation contractor in Burlington: (1) Get 3 written quotes with line-item breakdowns, (2) Verify VT license at Vermont Secretary of State (sos.vermont.gov), (3) Confirm active general liability and workers' comp insurance, (4) Check Google and BBB reviews specific to Burlington projects, (5) Never pay more than 10-30% upfront — never pay in full before completion.
Full Explanation
Red flags specific to Burlington contractors: no physical Burlington-area address, pressure to start immediately, cash-only payment demands, and license numbers that don't verify at Vermont Secretary of State (sos.vermont.gov). Seasonal demand during summer brings out less reputable contractors.
Local Factors in Burlington
📍Verify license: Vermont Secretary of State (sos.vermont.gov)
📍File complaints: Vermont Secretary of State (sos.vermont.gov)
📍Homeowner protections under VT consumer protection law
📍BBB Greater Burlington chapter for complaints history