Direct Answer
The best commercial glass & curtain wall installation contractors in Middletown are verified through Delaware Division of Revenue Contractor Registration (revenue.delaware.gov). Look for companies with 4.5+ Google stars, 50+ reviews, active DE license, and at least 5 years serving the Middletown area.
Full Explanation
Verify any Middletown contractor at Delaware Division of Revenue Contractor Registration (revenue.delaware.gov). Request proof of general liability insurance and workers' compensation. Ask for references from recent Middletown projects — local experience matters for understanding permit requirements and area-specific challenges.
Local Factors in Middletown
📍Verify license: Delaware Division of Revenue Contractor Registration (revenue.delaware.gov)
📍Middletown city permit office issues local permits
📍Check BBB Greater Middletown chapter
📍Require DE state license + local city license if applicable