583 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Alameda: Albert Nahman Plumbing, Heating, and Cooling, CR Score 65/100; 4.7★ from 3,311 Google reviews; open 24/7.
Best for emergencies (open 24/7): Cabrillo Plumbing, Heating & Air, posts 24/7 hours; ranked #2 of 583.
Most-reviewed: Service Champions, 5,220 Google reviews at 4.9★, the most of 583 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
583 Alameda HVAC contractors are ranked here by CR Score, from ten published factors. 144 are open 24/7, 363 open Saturdays and 288 open Sundays, based on posted hours. The median Google rating is 4.9★ across 583 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Albert Nahman Plumbing, Heating, and Cooling | 65 | 4.7★ (3,311) | Berkeley, 5 mi away | 24/7 | Overall |
| 2 | Cabrillo Plumbing, Heating & Air | 64 | 4.9★ (966) | San Francisco, 8 mi away | 24/7 | Emergencies |
| 3 | Heise's Plumbing | 64 | 4.9★ (1,454) | San Francisco, 10 mi away | 24/7 | — |
| 4 | Service Champions | 63 | 4.9★ (5,220) | Martinez, 19 mi away | 24/7 | Most reviews |
| 5 | Magic Plumbing Heating & Cooling | 63 | 4.9★ (1,876) | San Francisco, 8 mi away | Sat · Sun · Evenings | — |
| 6 | Alaska Refrigeration Air Conditioning & Heating Co | 63 | 4.9★ (130) | Alameda | 24/7 | — |
| 7 | Chill Heating and Cooling | 63 | 5.0★ (1,017) | San Ramon, 15 mi away | 24/7 | — |
| 8 | Arch Plumbing Inc. | 62 | 4.9★ (286) | San Francisco, 7 mi away | 24/7 | — |
| 9 | Jazz Heating, Air Conditioning and Plumbing | 62 | 4.9★ (3,438) | Pleasanton, 22 mi away | 24/7 | — |
| 10 | Hometown Heating and Air Conditioning | 62 | 4.9★ (2,463) | Concord, 20 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: 4.7★ from 3,311 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 966 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 10 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 1,454 Google reviews, listed on Google as “HVAC contractor”.
Based in Martinez, 19 mi away
Ranked #4 because of its Google rating and review volume: 4.9★ from 5,220 Google reviews, the most in Alameda.
Based in San Francisco, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 1,876 Google reviews, listed on Google as “HVAC contractor”.
Based in Alameda
Ranked #6 because of its Google rating and trade focus: 4.9★ from 130 Google reviews, listed on Google as “HVAC contractor”.
Based in San Ramon, 15 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 1,017 Google reviews, listed on Google as “HVAC contractor”.
Based in San Francisco, 7 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 286 Google reviews, listed on Google as “HVAC contractor”.
Based in Pleasanton, 22 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 3,438 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 2,463 Google reviews, listed on Google as “HVAC contractor”.
Based in Pleasanton, 19 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.
Based in Concord, 19 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 1,255 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 13 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 863 Google reviews, listed on Google as “HVAC contractor”.
Based in Walnut Creek, 16 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 481 Google reviews, listed on Google as “HVAC contractor”.
Based in Danville, 16 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 602 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakland, 3 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 200 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 12 mi away
Ranked #17 because of its Google rating and trade focus: 4.5★ from 1,252 Google reviews, listed on Google as “HVAC contractor”.
Based in Albany, 1 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 47 Google reviews, listed on Google as “Heating contractor”.
Based in Oakland, 4 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 569 Google reviews, listed on Google as “HVAC contractor”.
Based in Alameda
Ranked #20 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based in Sausalito, 14 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 211 Google reviews, listed on Google as “HVAC contractor”.
Based in Alamo, 20 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 2,473 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 10 mi away
Ranked #23 because of its Google rating and trade focus: 4.6★ from 474 Google reviews, listed on Google as “HVAC contractor”.
Based in San Lorenzo, 10 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 265 Google reviews, listed on Google as “HVAC contractor”.
Based in Hayward, 11 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 162 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 583 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 |
|---|---|---|
| A T Weber Plumbing | 4.2★ (30) | In Alameda |
| A.L.B HVAC refrigeration service | 4.7★ (12) | 3 mi |
| AC3 | 5.0★ (2) | In Alameda |
| Air Treatment Corporation | 5.0★ (1) | In Alameda |
| Arctic HVAC & Constructions | In Alameda | |
| Art of Comfort | 5.0★ (153) | 23 mi |
| Big Blue Plumbing | 4.7★ (575) | In Alameda |
| Comfort Air Mechanical Systems | 3.5★ (2) | In Alameda |
| Eco Systems Heating & Air Conditioning | 4.8★ (138) | 15 mi |
| Five Or Free Electrical Heating & Air Solutions | 4.8★ (219) | 4 mi |
| HTO Plumbing & Radiant | 5.0★ (1) | In Alameda |
| LJ MECHANICAL HEATING & COOLING INC | In Alameda | |
| Lower Hills Heating and Air Conditioning | 5.0★ (4) | In Alameda |
| ON TIME HVAC SF | 4.0★ (8) | In Alameda |
| Performance Contracting Inc | 5.0★ (5) | In Alameda |
| Pro Attic | 5.0★ (1) | In Alameda |
| QMS (Quality Marine Services) | 5.0★ (1) | In Alameda |
| Quaweay Electric | 5.0★ (2) | In Alameda |
| Superb Air Solutions | In Alameda | |
| Trane, Carrier & Mitsubishi HVAC Services in San Leandro | In Alameda |
National price ranges in USD, not adjusted for Alameda. 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 583 Alameda 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 Alameda 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 |