Regardless of the size or scope of a project, from the replacement of a leaking faucet to the design-build construction of a class ‘A’ office building, our focus remains true: We will deliver to our clients and customers the best workmanship at a fair and competitive price, and we guarantee a quality product that is inherent in the Warner name.

A Passion for building and an upfront approach

General Contracting and Construction Services… Warner Construction has emerged as the go-to general contractor in Frederick, Maryland, and the surrounding region. Specific services include pre-construction, construction management, and design-build – each of which comes with our unique owner focused team approach towards construction.

Building Mechanical Systems for Today and Tomorrow

Major Mechanical Installation and Renovation… As one of the region’s largest and most respected mechanical contractors, Warner Mechanical has the equipment and technology capable of handling even the most complex major mechanical systems and plumbing installations. With clients that include some of the world’s largest contracting companies, as well as school and government agencies throughout the quad-state region, our mechanical division is known for its team-focused approach to projects, scheduling integrity, reliable budgeting, and quality workmanship.

A State of the Art Full Service Sheet Metal Company

Sheet Metal Fabrication… Kaempf and Harris is a full-service sheet metal company offering exceptional craftsmanship and unmatched industry experience. Boasting a state-of-the-art fabrication shop, we are equipped to handle commercial, retail, industrial, institutional and custom fabrication projects of any size.

Dependable plumbing and HVAC service since 1937

Residential and Light Commercial Plumbing and HVAC Services… With residential services ranging from fixing a leaking faucet to complete kitchen and bathroom renovations, and commercial services that include tenant HVAC and plumbing fit out, Warner Service provides fast response, high quality work, and dependable service to our clients.