93/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 762 Google reviews, open 24/7.
- 4.9★ from 762 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11 Ross Ave, San Anselmo, CA 94960
Best HVAC Contractors in Larkspur, CA (2026)
283 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Larkspur: Ongaro & Sons, CR Score 93/100; 4.9★ from 762 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Local Plumbing, posts 24/7 hours; ranked #2 of 283.
- 5
Most-reviewed: Service Champions, 5,220 Google reviews at 4.9★, the most of 283 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
283 Larkspur HVAC contractors are ranked here by CR Score, from 8 published factors. 55 are open 24/7, 171 open Saturdays and 137 open Sundays, based on posted hours. The median Google rating is 4.9★ across 283 rated businesses.
Top 10 HVAC contractors in Larkspur at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Ongaro & Sons | 93 | 4.9★ (762) | San Anselmo, 3 mi away | 24/7 | Overall |
| 2 | Local Plumbing | 91 | 5.0★ (211) | Sausalito, 6 mi away | 24/7 | Emergencies |
| 3 | Heise's Plumbing | 90 | 4.9★ (1,454) | San Francisco, 15 mi away | 24/7 | — |
| 4 | Bellows Plumbing, Heating, Cooling & Electrical | 90 | 4.9★ (480) | Novato, 10 mi away | 24/7 | — |
| 5 | Service Champions | 90 | 4.9★ (5,220) | Martinez, 25 mi away | 24/7 | Most reviews |
| 6 | Albert Nahman Plumbing, Heating, and Cooling | 90 | 4.7★ (3,311) | Berkeley, 16 mi away | 24/7 | — |
| 7 | Cabrillo Plumbing, Heating & Air | 90 | 4.9★ (966) | San Francisco, 15 mi away | 24/7 | — |
| 8 | Arch Plumbing Inc. | 88 | 4.9★ (286) | San Francisco, 15 mi away | 24/7 | — |
| 9 | Fuse Service | 87 | 4.9★ (94) | Richmond, 11 mi away | 24/7 | — |
| 10 | Magic Plumbing Heating & Cooling | 87 | 4.9★ (1,876) | San Francisco, 17 mi away | Sat · Sun · Evenings | — |
The 283 best HVAC contractors in Larkspur, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Sausalito, 6 mi away
91/100CR ScoreRanked #2 because of its Google rating and availability: 5.0★ from 211 Google reviews, open 24/7.
- 5.0★ from 211 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 323 Pine St Ste. F, Sausalito, CA 94965
Based in San Francisco, 15 mi away
90/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 1,454 Google reviews, open 24/7.
- 4.9★ from 1,454 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 260 Ocean Ave, San Francisco, CA 94112
Based in Novato, 10 mi away
90/100CR ScoreRanked #4 because of its Google rating and availability: 4.9★ from 480 Google reviews, open 24/7.
- 4.9★ from 480 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 86 Hamilton Dr Suite A, Novato, CA 94949
Based in Martinez, 25 mi away
90/100CR ScoreRanked #5 because of its Google rating and review volume: 4.9★ from 5,220 Google reviews, the most Google reviews on this list (5,220).
- 4.9★ from 5,220 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 261 Arthur Rd, Martinez, CA 94553
Based in Berkeley, 16 mi away
90/100CR ScoreRanked #6 because of its Google rating and availability: 4.7★ from 3,311 Google reviews, open 24/7.
- 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 San Francisco, 15 mi away
90/100CR ScoreRanked #7 because of its Google rating and availability: 4.9★ from 966 Google reviews, open 24/7.
- 4.9★ from 966 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 78 Dorman Ave, San Francisco, CA 94124
Based in San Francisco, 15 mi away
88/100CR ScoreRanked #8 because of its Google rating and availability: 4.9★ from 286 Google reviews, open 24/7.
- 4.9★ from 286 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 121 Quint St STE 5E, San Francisco, CA 94124
#9 Fuse Service
Based in Richmond, 11 mi away
87/100CR ScoreRanked #9 because of its Google rating and availability: 4.9★ from 94 Google reviews, open 24/7.
- 4.9★ from 94 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 173 Lakeshore Ct, Richmond, CA 94804
Based in San Francisco, 17 mi away
87/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 1,876 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,876 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 1455 Bancroft Ave, San Francisco, CA 94124
#11 Ongaro & Sons
Based in Petaluma, 23 mi away
87/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 538 Google reviews, open 24/7.
- 4.9★ from 538 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 719 Southpoint Blvd, Petaluma, CA 94954
#12 Elevated Comfort
Based in San Rafael, 3 mi away
87/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 90 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 90 Google reviews
- Hours
- Mon–Sat 7 AM–8 PM · Sun 8 AM–8 PM
- Address
- 1105 Francisco Blvd E #4, San Rafael, CA 94901
Based in San Francisco, 11 mi away
86/100CR ScoreRanked #13 because of its Google rating and availability: 4.9★ from 69 Google reviews, open 24/7.
- 4.9★ from 69 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1725 Montgomery St, San Francisco, CA 94111
Based in Albany, 9 mi away
86/100CR ScoreRanked #14 because of its Google rating and availability: 5.0★ from 62 Google reviews, open 24/7.
- 5.0★ from 62 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Alameda, 12 mi away
85/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 32 Google reviews, open 24/7.
- 5.0★ from 32 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Berkeley, 12 mi away
85/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
- 5.0★ from 27 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in San Francisco, 12 mi away
85/100CR ScoreRanked #17 because of its Google rating and availability: 5.0★ from 30 Google reviews, open 24/7.
- 5.0★ from 30 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2151 Irving St, San Francisco, CA 94122
Based in Alameda, 11 mi away
85/100CR ScoreRanked #18 because of its Google rating and availability: 4.8★ from 36 Google reviews, open 24/7.
- 4.8★ from 36 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#19 1-888-Heat-Pumps
Based in Berkeley, 15 mi away
85/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 45 Google reviews, open 24/7.
- 5.0★ from 45 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1826 Prince St, Berkeley, CA 94703
Based in Novato, 9 mi away
85/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 1,640 Google reviews, listed on Google as “Air conditioning contractor”.
- 4.8★ from 1,640 Google reviews
- Hours
- Mon–Fri 7 AM–7:30 PM · Sat 7:30 AM–4 PM · Sun closed
- Address
- 24 Digital Dr STE 1, Novato, CA 94949
Based in San Francisco, 16 mi away
84/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 207 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 207 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 737 Lisbon St, San Francisco, CA 94112
Based in San Francisco, 14 mi away
84/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ from 333 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 333 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun 8 AM–6 PM
- Address
- 1 Henry Adams St unit S324, San Francisco, CA 94103
Based in Richmond, 12 mi away
84/100CR ScoreRanked #23 because of its Google rating and availability: 5.0★ from 17 Google reviews, open 24/7.
- 5.0★ from 17 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5419 Solano Ave, Richmond, CA 94805
Based in Petaluma, 24 mi away
84/100CR ScoreRanked #24 because of its Google rating and availability: 5.0★ from 82 Google reviews, open 24/7.
- 5.0★ from 82 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1317 Scott St, Petaluma, CA 94954
#25 Afterglow
Based in Albany, 19 mi away
84/100CR ScoreRanked #25 because of its Google rating and availability: 4.9★ from 47 Google reviews, open 24/7.
- 4.9★ from 47 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
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 283 ranked HVAC contractors here; the rest are on their profiles.
Also serving Larkspur
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.L.B HVAC refrigeration service | 4.7★ (12) | 18 mi |
| ARASTEK Heating and Cooling , HVAC , Air Conditioning | 5.0★ (2) | 7 mi |
| BEST CHOICE HVAC, INC | 5.0★ (4) | 16 mi |
| Brothers Energy | 5.0★ (2) | 7 mi |
| California HVAC | 4.9★ (59) | 20 mi |
| Central Refrigeration Co | 4.2★ (5) | 18 mi |
| Comfort Air Mechanical Systems | 3.5★ (2) | 19 mi |
| Creative Comfort Systems | 5.0★ (2) | 21 mi |
| Five Or Free Electrical Heating & Air Solutions | 4.8★ (219) | 17 mi |
| Lower Hills Heating and Air Conditioning | 5.0★ (4) | 20 mi |
| McHale's Heating Air | 5.0★ (3) | 25 mi |
| North Cal Heating And Air | 5.0★ (2) | 7 mi |
| North Star Heating & Cooling | 5.0★ (2) | 7 mi |
| O'Keeffe Mechanical Co Inc | 3.0★ (3) | 15 mi |
| ON TIME HVAC SF | 4.0★ (8) | 21 mi |
| Quaweay Electric | 5.0★ (2) | 18 mi |
| Rising Design & Construction | 3.0★ (2) | 10 mi |
| Sears Heating and Air Conditioning | 3.0★ (2) | 13 mi |
| Seaside Refrigeration / HVAC | 4.2★ (5) | 24 mi |
| Severson Heating & Cooling | 4.9★ (46) | 25 mi |
How much do HVAC contractors cost in Larkspur?
National price ranges in USD, not adjusted for Larkspur. 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 Larkspur HVAC contractors
We scored 283 Larkspur HVAC contractors on 8 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. Unknown factors are left out of the score, 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 Larkspur data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
HVAC contractors in Larkspur: frequently asked questions
Who is the best HVAC contractor in Larkspur?
By CR Score, the highest-ranked HVAC contractor in Larkspur, CA is Ongaro & Sons with a CR Score of 93/100. It has 4.9★ from 762 Google reviews. It is open 24/7. Local Plumbing (#2) and Heise's Plumbing (#3) follow. We ranked 283 HVAC contractors on 8 factors, last updated October 22, 2026.
How many HVAC contractors are there in Larkspur?
ContractorsRanked ranks 283 HVAC contractors serving Larkspur, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Larkspur are open 24/7?
55 ranked HVAC contractors in Larkspur post 24/7 hours. The highest-ranked are Ongaro & Sons (#1), Local Plumbing (#2) and Heise's Plumbing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Larkspur work on weekends?
171 of 283 ranked HVAC contractors post Saturday hours and 137 post Sunday hours. The highest-ranked open Saturdays are Ongaro & Sons (#1), Local Plumbing (#2) and Heise's Plumbing (#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 Larkspur?
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 Larkspur. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Larkspur HVAC contractors have?
The median Google rating among 283 rated HVAC contractors in Larkspur is 4.9★, with a median of 14 reviews. Service Champions has the most, 5,220 reviews, and ranks #5. 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 Larkspur?
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 Larkspur
- October 2026: CR Scores recalculated for 283 hvac contractors serving Larkspur.
- October 2026: 2 duplicate listings merged.
More HVAC contractors and Larkspur pages
HVAC contractors near Larkspur
- HVAC contractors in Corte Madera, CA292 ranked
- HVAC contractors in Kentfield, CA269 ranked
- HVAC contractors in Mill Valley, CA265 ranked
- HVAC contractors in San Rafael, CA276 ranked
- HVAC contractors in Strawberry, CA307 ranked
- HVAC contractors in San Anselmo, CA264 ranked
- HVAC contractors in Tamalpais Valley, CA267 ranked
- HVAC contractors in Tamalpais-Homestead Valley, CA275 ranked
- HVAC contractors in Fairfax, CA239 ranked
- HVAC contractors in Sausalito, CA350 ranked
Other trades in Larkspur
- Roofers in Larkspur581 ranked
- Plumbers in Larkspur435 ranked
- Electricians in Larkspur327 ranked
- General contractors in Larkspur672 ranked
- Painters in Larkspur161 ranked
- Landscapers in Larkspur90 ranked
- Handymen in Larkspur74 ranked
- Kitchen remodelers in Larkspur265 ranked
- Bathroom remodelers in Larkspur259 ranked
- Flooring contractors in Larkspur173 ranked
- Tile installers in Larkspur36 ranked
- Drywall contractors in Larkspur23 ranked
- Concrete contractors in Larkspur155 ranked
- Fence contractors in Larkspur79 ranked
- Deck builders in Larkspur86 ranked
- Siding contractors in Larkspur88 ranked
- Window installers in Larkspur252 ranked
- Gutter installers in Larkspur101 ranked
- Insulation contractors in Larkspur65 ranked
- Solar installers in Larkspur230 ranked
- Garage door repair companies in Larkspur128 ranked
- Foundation repair companies in Larkspur108 ranked
- Tree services in Larkspur132 ranked
- Masonry contractors in Larkspur78 ranked
- Water damage restoration companies in Larkspur302 ranked
- Home builders in Larkspur359 ranked
- Demolition contractors in Larkspur75 ranked
- All contractors in Larkspur