1901 Inc.

1901 Inc. has operated continuously since 1901, making it one of the oldest mechanical, electrical and plumbing contractors in Wisconsin. This Madison-based company employs 400 people across the Midwest and maintains a 4.4-star rating from 51 customer reviews. The firm serves commercial, institutional and industrial clients throughout Wisconsin and the broader Midwestern region, handling large-scale design-build projects as well as ongoing service contracts.

What distinguishes 1901 Inc. from smaller HVAC outfits is its comprehensive MEP (mechanical, electrical, plumbing) capabilities under one roof. Unlike contractors who subcontract trades, 1901 maintains in-house teams for each discipline, enabling coordinated project delivery from design through installation to servicing. The company operates a service department staffed with factory-trained technicians who handle repairs, preventive maintenance, and emergency calls for systems they install or service.

Several reviewers specifically named technicians who resolved their issues. Ryan, an HVAC service professional, earned repeat business from one client who described him as trustworthy and capable of keeping units running problem-free through entire seasons. When a conference center's cooling system failed during a busy event, technician Dave D. arrived the same morning, completed diagnostics, secured same-day parts, and had the system operational before the day ended. Another reviewer praised plumber Steven and service manager Dan Powell for resolving complex plumbing issues in a 1918 home.