66/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 5,220 Google reviews, the most in Clayton.
- 4.9★ from 5,220 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 261 Arthur Rd, Martinez, CA 94553
Best HVAC Contractors in Clayton, CA (2026)
462 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Clayton: Service Champions, CR Score 66/100; 4.9★ from 5,220 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Perfect Star Heating, Cooling, & Electrical, posts 24/7 hours; ranked #2 of 462.
- 10
Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 462 ranked after Service Champions; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
462 Clayton HVAC contractors are ranked here by CR Score, from ten published factors. 121 are open 24/7, 268 open Saturdays and 193 open Sundays, based on posted hours. The median Google rating is 4.9★ across 462 rated businesses.
Top 10 HVAC contractors in Clayton at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Service Champions | 66 | 4.9★ (5,220) | Martinez, 10 mi away | 24/7 | Overall |
| 2 | Perfect Star Heating, Cooling, & Electrical | 65 | 4.9★ (1,255) | Concord, 3 mi away | 24/7 | Emergencies |
| 3 | Hometown Heating and Air Conditioning | 65 | 4.9★ (2,463) | Concord, 8 mi away | 24/7 | — |
| 4 | Perfect Star Heating, Cooling, & Electrical | 65 | 4.9★ (2,331) | Antioch, 7 mi away | 24/7 | — |
| 5 | Reliable Appliance, Heating and Air | 64 | 4.9★ (2,473) | Alamo, 4 mi away | Sat · Sun · Evenings | — |
| 6 | Stewart Heating, Plumbing and Air Conditioning | 64 | 4.9★ (851) | Pittsburg, 6 mi away | 24/7 | — |
| 7 | Chill Heating and Cooling | 64 | 5.0★ (1,017) | San Ramon, 11 mi away | 24/7 | — |
| 8 | Chill Heating and Cooling | 64 | 5.0★ (481) | Walnut Creek, 6 mi away | 24/7 | — |
| 9 | Freschi Service Experts | 63 | 4.8★ (1,046) | Concord, 7 mi away | 24/7 | — |
| 10 | Service Champions | 63 | 4.9★ (4,721) | Livermore, 19 mi away | 24/7 | Most reviews |
The 462 best HVAC contractors in Clayton, ranked
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.
Based in Concord, 3 mi away
65/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 1,255 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,255 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4415 Cowell Rd, Concord, CA 94518
Based in Concord, 8 mi away
65/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 2,463 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,463 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4075 Nelson Ave Suite D, Concord, CA 94520
Based in Antioch, 7 mi away
65/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 2,331 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,331 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2595 W 10th St, Antioch, CA 94509
Based in Alamo, 4 mi away
64/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 2,473 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,473 Google reviews
- Hours
- Mon–Sun 6 AM–7 PM
Based in Pittsburg, 6 mi away
64/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 851 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 851 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 620 Garcia Ave ste a, Pittsburg, CA 94565
Based in San Ramon, 11 mi away
64/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 1,017 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 23 Beta Ct suite f, San Ramon, CA 94583
Based in Walnut Creek, 6 mi away
64/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 481 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 481 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11 Cll Este, Walnut Creek, CA 94597
Based in Concord, 7 mi away
63/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 1,046 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,046 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2440 Sprig Ct, Concord, CA 94520
Based in Livermore, 19 mi away
63/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 4,721 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 4,721 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 207 Boeing Ct, Livermore, CA 94551
Based in Pleasanton, 18 mi away
63/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 3,438 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 3,438 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2158 Rheem Dr, Pleasanton, CA 94588
Based in Danville, 9 mi away
63/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 602 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 602 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 801 Lancelot Ct, Danville, CA 94526
Based in Brentwood, 14 mi away
62/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 709 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 709 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 570 Valdry Ct C3, Brentwood, CA 94513
Based in Pleasanton, 17 mi away
62/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 2,337 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7020 Commerce Dr, Pleasanton, CA 94588
Based in Concord, 7 mi away
62/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 324 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 324 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1717 Solano Way STE 7, Concord, CA 94520
Based in Pleasant Hill, 7 mi away
62/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 370 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 370 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3301 Vincent Rd, Pleasant Hill, CA 94523
Based in Pittsburg, 5 mi away
62/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 151 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 928 Jewett Ave, Pittsburg, CA 94565
Based in Alamo, 3 mi away
62/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 358 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 358 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun 9 AM–5 PM
Based in Berkeley, 19 mi away
61/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 3,311 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 3,311 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3333 Martin Luther King Jr Way, Berkeley, CA 94703
Based in Concord, 5 mi away
61/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 109 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 109 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1900 Lynwood Dr Suite, Concord, CA 94519
Based in Alamo, 4 mi away
61/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 73 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 73 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Livermore, 20 mi away
61/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 920 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 920 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4935 Southfront Rd A, Livermore, CA 94551
Based in Antioch, 6 mi away
60/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 67 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 67 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Benicia, 15 mi away
60/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.8★ from 1,142 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,142 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 361 W Channel Rd, Benicia, CA 94510
Based in Antioch, 9 mi away
60/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 292 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 292 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2825 Mayflower Dr, Antioch, CA 94531
HVAC contractors ranked #26 to #50
#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 462 ranked HVAC contractors here; the rest are on their profiles.
Also serving Clayton
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 Danville | 5.0★ (2) | 9 mi |
| AC Repair San Ramon | 3.5★ (2) | 8 mi |
| Albert Nahman Plumbing, Heating, and Cooling | 4.6★ (474) | 23 mi |
| All Bay HVAC & Construction Co | 3.5★ (2) | 7 mi |
| Bay Air Systems | 5.0★ (2) | 7 mi |
| Bay HVAC Alliance | 5.0★ (2) | 4 mi |
| Celsius Heating and Cooling LLC | 5.0★ (2) | 5 mi |
| Diablo Boiler | 4.5★ (2) | 9 mi |
| Diablo Valley Comfort Systems | 5.0★ (2) | 4 mi |
| Double R Heating & Air Conditioning | 4.9★ (174) | 13 mi |
| Freeway Mechanical | 5.0★ (2) | 4 mi |
| Fuse HVACR & Electrical | 5.0★ (7) | 3 mi |
| JJ Heating and Air Conditioning Co | 4.8★ (155) | 18 mi |
| Jorge & Sons Water Heaters | 4.9★ (18) | 7 mi |
| LEET Kitchen & Bathroom Remodeling | 5.0★ (2) | 11 mi |
| Premium Express Heating and Air Conditioning | 5.0★ (2) | 8 mi |
| Rooter Hero Plumbing & Air | 4.8★ (1,291) | 8 mi |
| Same Day Air Conditioning & Heating | 4.5★ (700) | 24 mi |
| Service Hero Plumbing & Air | 4.5★ (1,252) | 23 mi |
| Simple Air | 3.0★ (2) | 9 mi |
How much do HVAC contractors cost in Clayton?
National price ranges in USD, not adjusted for Clayton. 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 |
How to check an HVAC contractor's license in California
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).
- Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
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
When to hire an HVAC contractor in California
California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
How we ranked Clayton HVAC contractors
We scored 462 Clayton 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 Clayton 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 |
HVAC contractors in Clayton: frequently asked questions
Who is the best HVAC contractor in Clayton?
By CR Score, the highest-ranked HVAC contractor in Clayton, CA is Service Champions with a CR Score of 66/100. It has 4.9★ from 5,220 Google reviews. It is open 24/7. Perfect Star Heating, Cooling, & Electrical (#2) and Hometown Heating and Air Conditioning (#3) follow. We ranked 462 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Clayton?
ContractorsRanked ranks 462 HVAC contractors serving Clayton, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Clayton are open 24/7?
121 ranked HVAC contractors in Clayton post 24/7 hours. The highest-ranked are Service Champions (#1), Perfect Star Heating, Cooling, & Electrical (#2) and Hometown Heating and Air Conditioning (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Clayton work on weekends?
268 of 462 ranked HVAC contractors post Saturday hours and 193 post Sunday hours. The highest-ranked open Saturdays are Service Champions (#1), Perfect Star Heating, Cooling, & Electrical (#2) and Hometown Heating and Air Conditioning (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check an HVAC contractor's license in California?
In California, Contractors State License Board (CSLB) handles licensing and covers C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license. Search the business or license number at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Jobs of $1,000 or more in labor and materials (from January 1, 2025).
How much does ac replacement cost in Clayton?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Clayton. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Clayton HVAC contractors have?
The median Google rating among 462 rated HVAC contractors in Clayton is 4.9★, with a median of 15 reviews. Service Champions has the most, 5,220 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Clayton?
California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
Update log for Clayton
- October 2026: CR Scores recalculated for 462 hvac contractors serving Clayton.
- October 2026: 4 duplicate listings merged.
More HVAC contractors and Clayton pages
HVAC contractors near Clayton
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Other trades in Clayton
- Roofers in Clayton709 ranked
- Plumbers in Clayton511 ranked
- Electricians in Clayton338 ranked
- General contractors in Clayton653 ranked
- Painters in Clayton141 ranked
- Landscapers in Clayton133 ranked
- Handymen in Clayton73 ranked
- Kitchen remodelers in Clayton350 ranked
- Bathroom remodelers in Clayton328 ranked
- Flooring contractors in Clayton240 ranked
- Tile installers in Clayton42 ranked
- Drywall contractors in Clayton17 ranked
- Concrete contractors in Clayton228 ranked
- Fence contractors in Clayton109 ranked
- Deck builders in Clayton117 ranked
- Siding contractors in Clayton100 ranked
- Window installers in Clayton311 ranked
- Gutter installers in Clayton141 ranked
- Insulation contractors in Clayton83 ranked
- Solar installers in Clayton297 ranked
- Garage door repair companies in Clayton169 ranked
- Foundation repair companies in Clayton120 ranked
- Tree services in Clayton209 ranked
- Masonry contractors in Clayton94 ranked
- Water damage restoration companies in Clayton365 ranked
- Home builders in Clayton461 ranked
- Demolition contractors in Clayton73 ranked
- All contractors in Clayton