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General Info
J.M. Brennan, founded in 1932, is a mechanical contracting firm that serves the southeastern Wisconsin area. It provides design and installation of boilers, chillers, air handling units, exhausts, ventilators, sanitary sewers, water treatment plants and heat recovery systems. The company also provides piping services for food grade, refrigeration, industrial gas, underground and compressed air applications. It provides services through a team of designers, engineers, steam and refrigeration fitters and sheet metal workers. The company is family-owned and managed and utilizes a variety of equipment, including backhoes and dump trucks. J.M. Brennan also provides round-the-clock repair and maintenance services and maintains its office in Milwaukee.
BBB Rating
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BBB Accredited businesses follow the BBB Code of Business Practices and pay a fee for accreditation review and monitoring. Accreditation is not a BBB endorsement or evaluation of the business’ product quality or competency in performing services.

BBB Rating and Accreditation information may be delayed up to a week.

Regular Hours

Extra Phones

Phone: (414) 342-3209

TollFree: (888) 560-6041

  • Heating
  • Air Conditioning
  • Service & Repair
  • Installation
Payment method
cash only
Menomonee River Valley

Brennan, J M

J.M. Brennan Inc.

Brennan, J M - J M Brennan

J.M. Brennan, Inc.

Brennan Jm

Brennan JM

Building Contractors-Commercial & Industrial, Controls, Control Systems & Regulators, Furnaces-Heating, Water Heaters, Sheet Metal Work, Heating Contractors & Specialties, Air Conditioning Service & Repair, Plumbers, Air Conditioning Contractors & Systems, Mechanical Contractors, Ventilating Contractors, Boiler Repair & Cleaning, Gas Plant Equipment, Water Heater Repair, Dust Collecting Equipment & Systems, Heating Equipment & Systems, Heating Equipment & Systems-Repairing, Piping Contractors, Controls, Control Systems & Regulators-Wholesale & Manufacturers, Boilers Equipment, Parts & Supplies, Building Contractors
Other Information

Services: Heating, Air Conditioning, Service & Repair, Installation

Same Day Service: Yes

Emergency Service: Yes


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