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