24/7 Emergency Service: (414) 342-3829

What We Do


J.M. Brennan works to understand your needs to design a system that works for you today and tomorrow.

Learn More

Build & Install

J.M. Brennan is building on a tradition of quality, workmanship, and superior value.

Learn More

24/7 Service

J.M. Brennan technicians have the skills for every job, whether that's doing an inspection or repairing a burst pipe.

Learn More

Experienced Contractors

92 years of industry experience

Contact Us