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M and M Heating, Cooling, Plumbing and Electrical is a premier residential and commercial provider of heating, air conditioning, ventilation, plumbing, and electrical services in Johnstown, Colorado. We are your trusted resource for everyday, complex and unexpected challenges. Our fully certified team sells, repairs, maintains, replaces, and installs all types of systems, maximizing efficiency and reliability.

Top-Quality Plumbing, Electrical and HVAC Services in Johnstown, CO

Our hiring standards include NATE-certified professionals, rigorous training, and total dedication to customer satisfaction. We maintain the rigorous requirements of a Carrier Factory Authorized Dealer and keep up with progressive technology, techniques, and protocols. When you hire M and M Heating, Cooling, Plumbing and Electrical to handle your needs, we take every extra step to maximize value and exceed expectations.


M and M Heating, Cooling, Plumbing and Electrical

110 South Bowen Circle
Longmont, CO 80501
Call Us: (720) 608-3973
Review Us on Google


For all your heating, A/C and home improvement needs, call M and M Heating, Cooling, Plumbing and Electrical!

A family-owned and operated business for 26 years, we encourage you to get in touch with us at (720) 608-3973. All HVAC, electrical, and plumbing services are handled with punctual arrival, tidy job sites, honesty, and integrity. There are very clear reasons why we’ve been awarded the Times Call Readers Choice Award for the last five consecutive years. Find out why your friends and neighbors recommend M and M Heating, Cooling, Plumbing and Electrical for expert service across Longmont, Dacono, Eric, Firestone, Frederick, Johnstown, Longmont, Mead, CO.

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Word Around Town
So far, so good! The tech, Will, who came out to evaluate our AC and Furnace was quick and efficient, and located the issues that two other well-reviewed local HVAC companies didn’t catch. He made clear recommendations on how we...
Ben W.
I appreciate the honesty and integrity that he presented. Did not try to steer me in a direction that was not needed just to make a buck. I would recommend M and M just off that alone. That’s hard to...
Mike R.
As usual, the service was timely and Stephen does an exceptional job. Very customer oriented, and explains any issues in detail so you can make educated decisions. Have used M&M for many years and extremely pleased.
Michael G.
M and M replaced my 40 year old hot water baseboard boiler heater and zone valves. They did a great job. Professional and protected my new carpet. I would highly recommend them.
Brian W.
Working with Chad was really great. He understood our needs, explained what would need to be done to accomplish our needs. He produced a reasonable quote and we have scheduled the time to get the wok done. Easy as one,...
Ken R.
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Johnstown, CO