661 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in San Lorenzo: Jazz Heating, Air Conditioning and Plumbing, CR Score 64/100; 4.9★ from 3,438 Google reviews; open 24/7.
Best for emergencies (open 24/7): Chill Heating and Cooling, posts 24/7 hours; ranked #2 of 661.
Most-reviewed: Service Champions, 5,220 Google reviews at 4.9★, the most of 661 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
661 San Lorenzo HVAC contractors are ranked here by CR Score, from ten published factors. 180 are open 24/7, 417 open Saturdays and 337 open Sundays, based on posted hours. The median Google rating is 4.9★ across 661 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Jazz Heating, Air Conditioning and Plumbing | 64 | 4.9★ (3,438) | Pleasanton, 14 mi away | 24/7 | Overall |
| 2 | Chill Heating and Cooling | 64 | 5.0★ (1,017) | San Ramon, 10 mi away | 24/7 | Emergencies |
| 3 | Service Champions | 64 | 4.9★ (4,721) | Livermore, 18 mi away | 24/7 | — |
| 4 | Service Champions | 64 | 4.8★ (2,337) | Pleasanton, 11 mi away | 24/7 | — |
| 5 | Bell Brothers Plumbing Heating & Air - Hayward | 63 | 4.7★ (863) | Hayward, 4 mi away | 24/7 | — |
| 6 | Service Hero Plumbing & Air | 63 | 4.5★ (1,252) | Hayward, 3 mi away | 24/7 | — |
| 7 | Albert Nahman Plumbing, Heating, and Cooling | 63 | 4.7★ (3,311) | Berkeley, 14 mi away | 24/7 | — |
| 8 | Rooter Hero Plumbing & Air of San Lorenzo | 63 | 4.7★ (265) | San Lorenzo | 24/7 | — |
| 9 | Bay Area Climate Control | 62 | 4.9★ (162) | Hayward, 2 mi away | 24/7 | — |
| 10 | Service Champions | 62 | 4.9★ (5,220) | Martinez, 23 mi away | 24/7 | Most reviews |
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 in San Lorenzo
Based in Pleasanton, 14 mi away
Ranked #1 because of its Google rating and trade focus: 4.9★ from 3,438 Google reviews, listed on Google as “HVAC contractor”.
Based in San Ramon, 10 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in Livermore, 18 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 4,721 Google reviews, listed on Google as “HVAC contractor”.
Based in Pleasanton, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 4 mi away
Ranked #5 because of its Google rating and trade focus: 4.7★ from 863 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 3 mi away
Ranked #6 because of its Google rating and trade focus: 4.5★ from 1,252 Google reviews, listed on Google as “HVAC contractor”.
Based in Berkeley, 14 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 3,311 Google reviews, listed on Google as “HVAC contractor”.
Based in San Lorenzo
Ranked #8 because of its Google rating and trade focus: 4.7★ from 265 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 2 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 162 Google reviews, listed on Google as “HVAC contractor”.
Based in Martinez, 23 mi away
Ranked #10 because of its Google rating and review volume: 4.9★ from 5,220 Google reviews, the most in San Lorenzo.
Based in Hayward, 2 mi away
Ranked #11 because of its Google rating and trade focus: 4.6★ from 474 Google reviews, listed on Google as “HVAC contractor”.
Based in Fremont, 14 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 761 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 4 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 172 Google reviews, listed on Google as “HVAC contractor”.
Based in Danville, 13 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 602 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 18 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 1,454 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 966 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 4 mi away
Ranked #17 because of its Google rating and trade focus: 4.5★ from 700 Google reviews, listed on Google as “HVAC contractor”.
Based in San Jose, 23 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 3,407 Google reviews, listed on Google as “HVAC contractor”.
Based in Fremont, 15 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 723 Google reviews, listed on Google as “HVAC contractor”.
Based in Alameda, 5 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 130 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 23 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 2,463 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 15 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,876 Google reviews, listed on Google as “HVAC contractor”.
Based in San Leandro, 3 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 111 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 20 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 1,255 Google reviews, listed on Google as “HVAC contractor”.
Based in Palo Alto, 16 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 444 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 661 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 Danville | 5.0★ (2) | 12 mi |
| Atlas Trillo | 4.6★ (1,308) | 23 mi |
| Automatic Control Engineering | 4.5★ (2) | 2 mi |
| California HVAC | 4.9★ (59) | 9 mi |
| Comfort Air Mechanical Systems | 3.5★ (2) | 10 mi |
| Commercial Filter Services | 3.0★ (2) | 4 mi |
| E-fficient HVAC | 5.0★ (2) | 7 mi |
| Furnace / AC repair service. Commercial refrigeration, HVAC | 5.0★ (2) | 11 mi |
| Fuse | 4.9★ (400) | 23 mi |
| Fuse HVAC, Refrigeration, Electrical & Plumbing | 4.9★ (216) | 20 mi |
| Glover & Son Heating & Air Inc | 3.0★ (2) | 10 mi |
| Hayward duct cleaning & dryer solution | 5.0★ (2) | 2 mi |
| Heating And Air Conditioning | 5.0★ (2) | 10 mi |
| Insulation & Air Duct Crew | 5.0★ (2) | 3 mi |
| LEET Kitchen & Bathroom Remodeling | 5.0★ (2) | 11 mi |
| Normandy Heating and Air Conditioning | 5.0★ (2) | 11 mi |
| Panda Heating & Cooling | 3.5★ (2) | 5 mi |
| Quaweay Electric | 5.0★ (2) | 11 mi |
| RJA Group LLC | 3.0★ (2) | 2 mi |
| Same Day Air Conditioning & Heating | 4.7★ (550) | 21 mi |
National price ranges in USD, not adjusted for San Lorenzo. 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 661 San Lorenzo 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 San Lorenzo 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 |