A Veteran-Owned Company Built on Honest Work
Mammoth Plumbing, Heating & Air is a veteran-owned and operated company serving homeowners throughout the Denver metro.
The company was built around a simple idea:
When something breaks in your home, you should be able to call a company that shows up, communicates clearly, and fixes the problem the right way.
That’s the approach Mammoth brings to every job.
Homeowners deserve reliable service, honest answers, and work that’s done carefully.
Mammoth exists to provide exactly that.
Meet the Owner
Mammoth Plumbing, Heating & Air is owned and operated by Jeff Dunlap, a Marine Corps veteran and Colorado native.
Jeff built Mammoth with the goal of creating a company homeowners could trust.
That means showing up when you say you will, explaining problems honestly, and doing work that holds up over time.
His time in the Marine Corps helped shape the way he approaches business today.
Discipline, accountability, and pride in the work are values that carry into every service call.
Jeff Dunlap
Owner and Operator of Mammoth Plumbing, Heating, and Air
What Mammoth Stands For
Running a veteran-owned company means holding ourselves to a high standard of service and accountability.
At Mammoth Plumbing, Heating & Air, that shows up in a few simple values.
Integrity
We believe in honest communication and straightforward recommendations.
If something needs to be fixed, we explain why.
If it doesn’t, we’ll tell you that too.
Accountability
We believe in showing up when we say we will and doing the job correctly.
When we take on a job, we take responsibility for the work.
And we stand behind the service we provide.
Professionalism
We believe in treating our customers and their homes with respect.
We show up prepared, communicate clearly, and take pride in our work.
And we leave every job cleaner and better than we found it.
Quality Work
We believe repairs and installations should be done the right way.
We take the time to diagnose problems properly and fix them carefully.
So homeowners aren’t dealing with the same issue again a few weeks later.
What Homeowners Can Expect from Mammoth
When you call Mammoth Plumbing, Heating & Air, the focus is simple: solve the problem and treat your home with respect.
Customers can expect clear explanations about what’s going on, straightforward repair options, and dependable workmanship.
Whether it’s a plumbing issue, a failing water heater, or a heating or cooling system that stops working, Mammoth focuses on practical solutions that last.
"The work completed is top notch, and their service drastically exceeds that of the “big name” outfits where you’re more so just the next number in line."
"Fast, friendly, and affordable service! We were very relieved to have someone come out on a weekend. Would highly recommend, and will definitely use them again!"
"Our experience was fantastic! They were on time, able to find and explain the issue in a way that I could understand, and the work was done well and in a timely fashion!"
Serving Homeowners Across the Denver Metro
Mammoth Plumbing, Heating & Air proudly serves homeowners throughout the Denver metro and surrounding communities.
The company focuses primarily on residential plumbing and HVAC service, helping homeowners handle the everyday problems that come with maintaining a home.
From plumbing repairs and drain issues to furnace service and air conditioning repair, Mammoth works to keep homes comfortable year round.
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