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Furnace repair, AC repair and plumbing in Littleton, Colorado.

Owner-operated, based right here in the area. Heating, cooling, water heaters, boilers and plumbing for Littleton homeowners. Historic Downtown · Sterne Park · Woodlawn · Southbridge · Ken Caryl and the surrounding neighborhoods. Flat-rate price quoted before any work starts.

Call or text (303) 601-1444 Book online
Same-day when the schedule allows Licensed & insured Open till 9 PM, seven days
AC replacement: new air conditioner condenser installed on a pad beside a brick building in the south Denver metro
Serving Littleton

What Littleton homeowners should know

Littleton has one of the widest housing age ranges of anywhere we work. The town was incorporated in 1890, and then it exploded: the population went from about 3,400 in 1950 to nearly 13,700 by 1960 as families moved south of Denver for the aerospace jobs. Whole streets went up inside that one decade. That history still shows up in the mechanical rooms. A lot of the older stock shares the same layout, the same ductwork logic and the same equipment age, so the houses tend to hit the same problems around the same time.

One tech, start to finishThe person who diagnoses the problem is the person who fixes it. No dispatcher, no rotating crew.
Flat-rate price before any workYou approve the number first. No hourly meter, no surprise invoice.
Heating, cooling & plumbing under one roofNo handoff between a separate HVAC company and a separate plumber. One call covers both.
Boilers and radiant heat, not just furnacesOlder homes are where hydronic systems turn up, and plenty of shops won't touch them. We will.
Whichever Littleton you're inThe city crosses three counties and the post office hands out Littleton addresses well past the city line. We go by where the house is.
Heating & cooling in Littleton

What we get called out for most in Littleton

Same technician for all of it, and one flat-rate price quoted before any work starts.

Furnace repair in Littleton

Littleton has some of the oldest housing stock we work in. Historic Downtown and Sterne Park homes often have furnaces that were retrofitted into spaces never designed for them, with ducting that has been modified by three different contractors. Diagnosing those properly takes longer and saves more. Furnace repair →

AC repair in Littleton

Plenty of older Littleton homes never had central air designed in, so what is there now was added later. Undersized returns and long duct runs are the usual reason a back bedroom never cools, and that is an airflow problem rather than a condenser problem. AC repair →

Boiler repair in Littleton

This is boiler country. Baseboard and in-floor hydronic heat are genuinely common in older Littleton homes, and most of the metro will only touch forced air. Boilers also have to be set for Colorado altitude the same as a furnace, which gets missed constantly. Boiler repair → Replacements come up more here than anywhere else we work, and in boiler country they need sizing to the loop, not a guess off the old nameplate. Boiler replacement →

Water heater repair in Littleton

Older Littleton basements often put the water heater somewhere awkward, and venting that was fine in 1974 is not always fine now. When we replace one we deal with the gas and venting properly rather than swapping the tank and leaving. Water heater lifespan →

What we do in Littleton

Furnace repair, AC repair and water heaters in Littleton

Water heaters

Tank and tankless repair, replacement and installation.

Boilers & radiant heat

Hydronic systems diagnosed and repaired by a tech who knows them.

Plumbing repair

Leaks, fixtures, disposals and general residential plumbing.

Swamp cooler service

Evaporative cooler repair, startup, winterization and AC conversion.

Real reviews

What homeowners say after we show up.

Rated 5.0 on Google.

We had an air conditioning issue on a Sunday & Jared from Atlas Mechanical responded promptly. He quickly diagnosed the problem, explained everything clearly, & had our system cooling again in no time.
JQ Jody QuintanaGoogle review · AC repair
Since 2011, Jared has installed six furnaces, three air conditioner units and handled HVAC repairs at my rental houses. He continues to be my go-to, and I'd recommend him.
DS David SpaethProperty owner · repeat customer since 2011
Read all reviews on Google
Full service area

Also serving the rest of the south Denver metro

Based in Lone Tree, covering Littleton and the surrounding communities below.

Littleton Lone Tree Highlands Ranch Castle Pines Parker Centennial Castle Rock Englewood Greenwood Village Denver Aurora Lakewood Westminster Thornton Broomfield Arvada Commerce City Golden Genesee Evergreen Indian Hills
HVAC & plumbing in Lone Tree →HVAC & plumbing in Highlands Ranch →HVAC & plumbing in Castle Rock →HVAC & plumbing in Parker →
Ready when you are

Something in Littleton not working right?

Call or text and you get Erica or Jared, not a call center. Same-day service when the schedule allows, and a flat-rate price before anything starts.

Call or text (303) 601-1444 Send us the details
Littleton questions

What homeowners ask us.

Do you do furnace repair in Littleton?
Yes. Furnace repair is the single thing we get called out for most in Littleton, from no-heat calls to short cycling to a furnace blowing cold. Call or text (303) 601-1444 early in the day for the best chance at a same-day slot, and you get a flat-rate price before any work starts.
Do you repair air conditioners in Littleton as well as furnaces?
Yes, and boilers, water heaters and plumbing too. One technician covers all of it on the same visit, so there is no handoff between a separate heating company and a separate plumbing company, and no second appointment to book.
Do you serve Littleton specifically, or just the general area?
Yes, Littleton is one of our core service areas, including Historic Downtown and Sterne Park, the Woodlawn and Southbridge areas, and out toward Ken Caryl and Columbine.
How fast can you get to Littleton for a repair?
Often same day when the schedule allows. Call or text (303) 601-1444 early in the day for the best shot at a same-day slot. We answer until 9 PM, seven days a week.
My mailing address says Littleton but I was told I'm not actually in the city. Do you still come out?
Yes. Littleton is one of the more confusing addresses in the metro. The city sits across Arapahoe, Jefferson and Douglas counties, and the post office puts a Littleton address on plenty of homes outside the city limits, including Ken Caryl and Columbine. We go by where your house actually is, not which line it falls on. If it matters for a permit, that's our problem to sort out, not yours.
My house is from the 1950s or 60s and never had central air. Can you add it?
Usually yes, and it's a common job in the older Littleton neighborhoods. The honest answer depends on what's already there. Existing ductwork was often sized for the original heating system alone, so it sometimes needs modification before it will carry cooling properly. We look at the ducting first and tell you what the house actually needs before quoting anything.
What will the repair cost?
We diagnose the problem first, then quote a flat-rate price before any work begins. You approve the number before we touch anything. No hourly meter, no commission-driven price book.
Do you work on plumbing too, or just HVAC?
Both. Atlas handles heating, cooling, water heaters, boilers and plumbing repairs. Same tech, one flat-rate quote, no handoff between separate HVAC and plumbing companies.
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