J M Brennan: Milwaukee's Trusted Mechanical Contractor Since 1932

For over 90 years, J M Brennan Milwaukee WI has been the go-to name for reliable mechanical systems in homes and businesses across southeastern Wisconsin. This family-owned firm provides expert design, installation, and 24/7 emergency service for HVAC, plumbing, and complex industrial piping needs.

Business Overview

J M Brennan is a full-service mechanical contracting company. They handle everything from residential furnace replacements to large-scale commercial boiler installations. Their team of skilled designers, engineers, fitters, and sheet metal workers is ready to tackle any project. They offer round-the-clock emergency repair, so help is always available, day or night.

Whether you're a homeowner in Wauwatosa dealing with a broken AC during a humid Milwaukee summer or a factory manager in Racine needing industrial gas piping, J M Brennan has the expertise.

Key Services

The company's wide range of services keeps Wisconsin homes comfortable and businesses running.

• HVAC Systems: Installation and replacement of boilers, chillers, air handlers, and heat recovery systems.
• Plumbing & Piping: Inspections, sanitary sewers, and specialized piping for food-grade, refrigeration, and compressed air applications.
• General Contracting: Full project management for mechanical system overhauls and new construction.

Areas Served

J M Brennan proudly serves a vast area of southeastern Wisconsin and northern Illinois. Their service footprint includes Milwaukee, Madison, Racine, Janesville, Sheboygan, and over 100 surrounding communities. They also extend service to the Rockford, IL area, including Belvidere, Loves Park, and Harvard.

Company History

The story of J M Brennan Milwaukee WI began in 1932. Founded as a family business, it has remained family-owned and managed for four generations. From its start near downtown Milwaukee, the company has grown by sticking to core values: quality craftsmanship and dependable service. Their long history means they've seen and solved nearly every mechanical challenge a Wisconsin building can face.

Leadership

Being family-owned means leadership is hands-on and invested in the community. The owners and managers have deep roots in the Milwaukee area and a personal stake in every job's success. Their involvement isn't just in business; it's in the neighborhoods they serve, supporting the local economy and training the next generation of skilled tradespeople.

Specialties & Highlights

What makes J M Brennan stand out?

• Multi-Generational Expertise: 90+ years of combined knowledge passed down through the family.
• Industrial & Commercial Focus: They handle complex projects like water treatment plants and industrial gas systems that many contractors cannot.
• Full Equipment Fleet: They own their equipment, from backhoes to dump trucks, ensuring project control and efficiency.
• Design-Build Capability: Their in-house team can design and install a complete mechanical system from scratch.

Why Locals Choose J M Brennan

Homeowners and business managers in Wisconsin choose J M Brennan for a simple reason: proven reliability. When winters are harsh and summers are muggy, you need systems that work and a contractor you can trust. Their long-standing presence in Milwaukee WI means they understand local building codes, climate demands, and the need for durable solutions. They don't just fix problems; they build systems meant to last for the long haul.