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