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