Direct Answer
The best commercial glass & curtain wall installation contractors in Columbus are verified through Ohio Construction Industry Licensing Board (com.ohio.gov). Look for companies with 4.5+ Google stars, 50+ reviews, active OH license, and at least 5 years serving the Columbus area. Post-storm periods see influx of unlicensed contractors — verify credentials carefully.
Full Explanation
Verify any Columbus contractor at Ohio Construction Industry Licensing Board (com.ohio.gov). Request proof of general liability insurance and workers' compensation. Ask for references from recent Columbus projects — local experience matters for understanding permit requirements and area-specific challenges.
Local Factors in Columbus
📍Verify license: Ohio Construction Industry Licensing Board (com.ohio.gov)
📍Columbus city permit office issues local permits
📍Check BBB Greater Columbus chapter
📍Require OH state license + local city license if applicable