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Emergency HVAC Contractors in Castle Rock, CO (2026)

Top 50 of 503 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Castle Rock: Nytech Heating, Cooling, and Plumbing, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Castle Rock at a glance

Top emergency HVAC contractors in Castle Rock at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Nytech Heating, Cooling, and Plumbing675.0★ (2,828)Castle Rock24/7
2Plumbline Services644.7★ (9,085)Centennial, 15 mi away24/7
3Mountain Air Comfort Systems644.9★ (285)Castle Rock24/7
4Allied Heating & Air Conditioning624.6★ (250)Castle Rock24/7
51st Choice Pro Services624.9★ (969)Parker, 12 mi away24/7
6Aim High HVAC625.0★ (760)Littleton, 13 mi away24/7
7Elkhorn Heating, Air Conditioning, Plumbing & Electrical624.9★ (1,799)Littleton, 16 mi away24/7
8888 Heating & Air Conditioning624.9★ (1,310)Centennial, 15 mi away24/7
9Jones Family Plumbing & HVAC624.8★ (89)Castle Rock24/7
10Patriot Pros Plumbing, Heating, Air & Electric624.7★ (1,722)Castle Rock24/7

Call an emergency HVAC contractor in Castle Rock now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Castle Rock, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 503 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  6. #6 Aim High HVAC

    Based in Littleton, 13 mi away

    62/100CR Score

    Ranked #6 because of its Google rating and trade focus: 5.0★ from 760 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 760 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9933 Titan Park Cir, Littleton, CO 80125
    View profile for Aim High HVAC(720) 445-4497

  15. #15 PS Cool Heat

    Based in Littleton, 12 mi away

    61/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 405 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 405 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4466 E Hunterwood Dr, Littleton, CO 80130
    View profile for PS Cool Heat(720) 285-0145

  16. #16 ROX Heating & Air

    Based in Littleton, 15 mi away

    61/100CR Score

    Ranked #16 because of its Google rating and trade focus: 4.9★ from 732 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 732 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1745 Shea Center Dr 4th Floor, Littleton, CO 80129
    View profile for ROX Heating & Air(720) 468-0689

  21. #21 Premier Heating and Air

    Based in Greenwood Village, 17 mi away

    61/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.7★ from 1,502 Google reviews, listed on Google as “Heating contractor”.

    • 4.7★ from 1,502 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8000 E Prentice Ave STE C5, Greenwood Village, CO 80111
    View profile for Premier Heating and Air(720) 954-2224

  22. #22 The Bee Heat & AC

    Based in Centennial, 15 mi away

    61/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.9★ from 466 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 466 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    14883 E Hinsdale Ave Unit 2, Centennial, CO 80112
    View profile for The Bee Heat & AC(720) 303-3441

  23. #23 Allen Service

    Based in Denver, 23 mi away

    61/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.8★ from 2,301 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 2,301 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2101 S Platte River Dr unit b 2, Denver, CO 80223
    View profile for Allen Service(720) 806-2364

  25. #25 HomeSmart

    Based in Centennial, 14 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.6★ from 889 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 889 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6675 South Kenton Street Suite 100, Centennial, CO 80111
    View profile for HomeSmart(855) 463-7526

Top 50 of 503 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Castle Rock, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Castle Rock HVAC Repair Experts605.0★ (26)In Castle Rock
27JC Mechanical Heating & Air Conditioning LLC604.8★ (586)16 mi
28SummitAir HVAC Repair Castle Rock605.0★ (26)In Castle Rock
29Better Built Heating and Cooling605.0★ (149)11 mi
30Coyote HVAC604.7★ (576)15 mi
31Priority Plumbing and Heating - Littleton604.8★ (963)20 mi
32Blue River Plumbing & Heating604.6★ (28)In Castle Rock
33Emporia Home Services605.0★ (535)20 mi
34One Nation Plumbing, Heating & Air605.0★ (259)17 mi
35Fireside Heating & Cooling605.0★ (119)12 mi
36ARS / Rescue Rooter594.5★ (3,114)24 mi
37Steel T Home Services594.8★ (906)22 mi
38Omni HVAC Service594.9★ (51)7 mi
39Thompson Heating And Cooling595.0★ (14)In Castle Rock
401st Choice Pro Services594.8★ (230)16 mi
41BEST HEATING COOLING & AIR595.0★ (172)16 mi
42Simply Mechanical, AC, Furnace & Boiler Repair594.9★ (388)20 mi
43Northwind Heating & Air Conditioning595.0★ (175)17 mi
44Summit Innovations Hvac595.0★ (11)In Castle Rock
45Air Plus Home Solutions Inc595.0★ (10)In Castle Rock
46Supreme Home Services594.9★ (103)13 mi
47Budget Heating And Cooling / Furnace / HVAC / Boilers594.8★ (327)19 mi
48FerguSon's Heating & Cooling, LLC595.0★ (239)19 mi
49Certified Comfort Heating & Cooling595.0★ (39)9 mi
50Comfort Systems of Colorado595.0★ (8)In Castle Rock

How we ranked emergency HVAC contractors in Castle Rock

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Castle Rock: questions

Which HVAC contractors in Castle Rock are open 24/7?

25 on this list post 24/7 hours, including Nytech Heating, Cooling, and Plumbing, Plumbline Services, Mountain Air Comfort Systems, Allied Heating & Air Conditioning and 1st Choice Pro Services.

Who is ranked #1 for emergency heating and cooling in Castle Rock, CO?

Nytech Heating, Cooling, and Plumbing is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Castle Rock ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Castle Rock

  1. October 2026: CR Scores recalculated for 503 hvac contractors serving Castle Rock.
  2. October 2026: 2 duplicate listings merged.

More emergency and heating and cooling pages