950 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Costa Mesa: JustinTime Plumbing Heating and Air, CR Score 66/100; 4.9★ from 1,328 Google reviews; open 24/7.
Best for emergencies (open 24/7): Dial One Sonshine Heating, Air & Plumbing, posts 24/7 hours; ranked #2 of 950.
Most-reviewed: Service Champions Plumbing, Heating & AC, 6,978 Google reviews at 4.9★, the most of 950 ranked; ranked #46.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
950 Costa Mesa HVAC contractors are ranked here by CR Score, from ten published factors. 317 are open 24/7, 741 open Saturdays and 508 open Sundays, based on posted hours. The median Google rating is 4.9★ across 950 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | JustinTime Plumbing Heating and Air | 66 | 4.9★ (1,328) | Costa Mesa | 24/7 | Overall |
| 2 | Dial One Sonshine Heating, Air & Plumbing | 65 | 4.9★ (2,852) | Santa Ana, 7 mi away | 24/7 | Emergencies |
| 3 | Absolute Airflow Air Conditioning, Heating and Plumbing | 64 | 4.8★ (4,319) | Westminster, 10 mi away | 24/7 | — |
| 4 | Pristine Air Conditioning, Heating & Plumbing | 64 | 5.0★ (284) | Costa Mesa | 24/7 | — |
| 5 | NexGen HVAC & Plumbing | 64 | 4.8★ (3,589) | Laguna Hills, 11 mi away | 24/7 | — |
| 6 | Coast Plumbing, Heating & Air, Inc. | 63 | 4.9★ (596) | Fountain Valley, 5 mi away | 24/7 | — |
| 7 | Command Comfort | 63 | 5.0★ (301) | Fountain Valley, 4 mi away | 24/7 | — |
| 8 | Service Hero Plumbing, HVAC, and Electrical | 63 | 4.8★ (1,840) | Orange, 12 mi away | 24/7 | — |
| 9 | Rooter Hero Plumbing & Air of Costa Mesa | 63 | 4.9★ (143) | Costa Mesa | 24/7 | — |
| 10 | Home Comfort USA | 62 | 4.8★ (2,813) | Anaheim, 16 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 1,328 Google reviews, listed on Google as “HVAC contractor”.
Based in Santa Ana, 7 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 2,852 Google reviews, listed on Google as “HVAC contractor”.
Based in Westminster, 10 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 4,319 Google reviews, listed on Google as “HVAC contractor”.
Based in Costa Mesa
Ranked #4 because of its Google rating and trade focus: 5.0★ from 284 Google reviews, listed on Google as “HVAC contractor”.
Based in Laguna Hills, 11 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 3,589 Google reviews, listed on Google as “HVAC contractor”.
Based in Fountain Valley, 5 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 596 Google reviews, listed on Google as “HVAC contractor”.
Based in Fountain Valley, 4 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 301 Google reviews, listed on Google as “HVAC contractor”.
Based in Orange, 12 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 1,840 Google reviews, listed on Google as “HVAC contractor”.
Based in Costa Mesa
Ranked #9 because of its Google rating and trade focus: 4.9★ from 143 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 16 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 2,813 Google reviews, listed on Google as “HVAC contractor”.
Based in Laguna Hills, 11 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 846 Google reviews, listed on Google as “HVAC contractor”.
Based in Costa Mesa
Ranked #12 because of its Google rating and trade focus: 4.9★ from 326 Google reviews, listed on Google as “HVAC contractor”.
Based in Irvine, 6 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 967 Google reviews, listed on Google as “Heating contractor”.
Based in Costa Mesa
Ranked #14 because of its Google rating and trade focus: 5.0★ from 76 Google reviews, listed on Google as “HVAC contractor”.
Based in Rancho Santa Margarita, 18 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 1,350 Google reviews, listed on Google as “HVAC contractor”.
Based in Costa Mesa
Ranked #16 because of its Google rating and trade focus: 4.9★ from 267 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 15 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 1,091 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Forest, 13 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 680 Google reviews, listed on Google as “HVAC contractor”.
Based in San Clemente, 23 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 3,766 Google reviews, listed on Google as “HVAC contractor”.
Based in Garden Grove, 9 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 684 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Tustin, 8 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 193 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Forest, 14 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 1,069 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 16 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 995 Google reviews, listed on Google as “HVAC contractor”.
Based in Cerritos, 19 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 1,582 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Forest, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 907 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 950 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
National price ranges in USD, not adjusted for Costa Mesa. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In California, Contractors State License Board (CSLB) licenses C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license.
Jobs of $1,000 or more in labor and materials (from January 1, 2025).
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
We scored 950 Costa Mesa HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 23, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Costa Mesa data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |