Mueller supplies custom metal building kits and individual steel components for workshops, garages, barns, storage, commercial facilities and selected living-space shells. Buyers can configure dimensions, openings, roof profiles, colors and accessories through a regional branch network, while the company manufactures framing and metal panels.

Roofing and component purchases are also available separately. Local engineering requirements, foundations, erection labor, insulation, interiors, utilities and permit responsibility should be itemized.