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

Committed to Long-Term Success from the Start

J.M. Brennan is the only mechanical contractor you want on the job for your new building or addition. From the beginning, we are committed to the long-term success of a project. If we see an opportunity for improvement, or to minimize future maintenance, we communicate it. If we see a problem, we fix it.

In addition to our talented tradespeople and superintendents, J.M. Brennan’s project managers are extremely experienced in both design and construction. Our longstanding client relationships are proof that customer satisfaction is behind everything we do.

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