301 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Discovery Bay: Elite Comfort Systems, CR Score 65/100; 5.0★ from 709 Google reviews; open 24/7.
Best for emergencies (open 24/7): Service Champions, posts 24/7 hours; ranked #2 of 301.
Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 301 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
301 Discovery Bay HVAC contractors are ranked here by CR Score, from ten published factors. 93 are open 24/7, 181 open Saturdays and 135 open Sundays, based on posted hours. The median Google rating is 4.9★ across 301 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Elite Comfort Systems | 65 | 5.0★ (709) | Brentwood, 5 mi away | 24/7 | Overall |
| 2 | Service Champions | 64 | 4.9★ (4,721) | Livermore, 19 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Perfect Star Heating, Cooling, & Electrical | 63 | 4.9★ (2,331) | Antioch, 15 mi away | 24/7 | — |
| 4 | Jazz Heating, Air Conditioning and Plumbing | 62 | 4.9★ (3,438) | Pleasanton, 22 mi away | 24/7 | — |
| 5 | Preet Heating, Cooling and Air Duct Cleaning | 62 | 5.0★ (284) | Lathrop, 9 mi away | 24/7 | — |
| 6 | Delta Sierra Mechanical | 62 | 4.9★ (1,140) | Stockton, 17 mi away | 24/7 | — |
| 7 | Service Experts Heating & Air Conditioning | 62 | 4.9★ (920) | Livermore, 16 mi away | 24/7 | — |
| 8 | Stewart Heating, Plumbing and Air Conditioning | 61 | 4.9★ (851) | Pittsburg, 17 mi away | 24/7 | — |
| 9 | Villara | 61 | 4.9★ (1,688) | Manteca, 23 mi away | 24/7 | — |
| 10 | Eagle Air | 61 | 4.9★ (549) | Livermore, 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: 5.0★ from 709 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 19 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 4,721 Google reviews, the most in Discovery Bay.
Based in Antioch, 15 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 2,331 Google reviews, listed on Google as “HVAC contractor”.
Based in Pleasanton, 22 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 3,438 Google reviews, listed on Google as “HVAC contractor”.
Based in Lathrop, 9 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 284 Google reviews, listed on Google as “HVAC contractor”.
Based in Stockton, 17 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 1,140 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 16 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 920 Google reviews, listed on Google as “HVAC contractor”.
Based in Pittsburg, 17 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 851 Google reviews, listed on Google as “HVAC contractor”.
Based in Manteca, 23 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 1,688 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 16 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 549 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 15 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 1,930 Google reviews, listed on Google as “HVAC contractor”.
Based in San Ramon, 23 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in Manteca, 24 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 1,808 Google reviews, listed on Google as “HVAC contractor”.
Based in Pleasanton, 23 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 22 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 1,255 Google reviews, listed on Google as “HVAC contractor”.
Based in Alamo, 22 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 2,473 Google reviews, listed on Google as “HVAC contractor”.
Based in Danville, 22 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 602 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 11 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 292 Google reviews, listed on Google as “HVAC contractor”.
Based in Pittsburg, 16 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 25 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 1,046 Google reviews, listed on Google as “HVAC contractor”.
Based in Walnut Creek, 25 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 481 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 19 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 172 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 72 Google reviews, listed on Google as “HVAC contractor”.
Based in Lathrop, 18 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 596 Google reviews, listed on Google as “Heating contractor”.
Based in Lodi, 25 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 454 Google reviews, listed on Google as “Air conditioning repair service”.
#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 301 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.
| Business | Google rating | Distance |
|---|---|---|
| AC Repair Brentwood | 4.7★ (3) | 8 mi |
| AC Repair Pleasanton | 5.0★ (2) | 19 mi |
| AC Repair San Ramon | 3.5★ (2) | 21 mi |
| Airteks Contractor | 5.0★ (2) | 18 mi |
| Airteks HVAC Services | 5.0★ (2) | 19 mi |
| Bay Area Comfort Garage Hvac | 5.0★ (2) | 6 mi |
| Bay HVAC Alliance | 5.0★ (2) | 22 mi |
| Delcon Heating & Air Conditioning | 5.0★ (2) | 19 mi |
| Diablo Boiler | 4.5★ (2) | 13 mi |
| Diablo Valley Comfort Systems | 5.0★ (2) | 20 mi |
| Discount Plumbing | 4.6★ (253) | 23 mi |
| Double R Heating & Air Conditioning | 5.0★ (2) | 15 mi |
| Eco HVAC & Airduct cleaning Danville | 3.0★ (2) | 22 mi |
| Freeway Mechanical | 5.0★ (2) | 22 mi |
| Galaxy Heating & Air Conditioning | 4.8★ (50) | 21 mi |
| Haddon Heating and Cooling | 4.3★ (410) | 25 mi |
| HVACR Medic | 5.0★ (2) | 18 mi |
| Jorge & Sons Water Heaters | 4.9★ (18) | 15 mi |
| Prime Air Duct Cleaning | 5.0★ (2) | 15 mi |
| Rooter Hero Plumbing & Air | 4.8★ (1,291) | 13 mi |
National price ranges in USD, not adjusted for Discovery Bay. 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 301 Discovery Bay 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 22, 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 Discovery Bay 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 |