63/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 153 Google reviews, the most in Ukiah.
- 4.9★ from 153 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best HVAC Contractors in Ukiah, CA (2026)
10 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ukiah: Right On Time Heating And Cooling™, CR Score 63/100; 4.9★ from 153 Google reviews; open 24/7.
- 10
Best for emergencies (open 24/7): McDonald Mechanical, posts 24/7 hours; ranked #10 of 10.
- 2
Most-reviewed: AC&R Services Heating & Cooling, Inc., 50 Google reviews at 4.7★, the most of 10 ranked after Right On Time Heating And Cooling™; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Ukiah HVAC contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 3 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.7★ across 10 rated businesses.
Top 10 HVAC contractors in Ukiah at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Right On Time Heating And Cooling™ | 63 | 4.9★ (153) | Clearlake, 20 mi away | 24/7 | Overall |
| 2 | AC&R Services Heating & Cooling, Inc. | 59 | 4.7★ (50) | Ukiah | — | Most reviews |
| 3 | Mindful Climate HVAC | 59 | 5.0★ (33) | Ukiah | — | — |
| 4 | Reliance Enterprises HVAC | 58 | 4.5★ (45) | Ukiah | — | — |
| 5 | COMFORT AIR HEATING/COOLING | 57 | 4.6★ (22) | Ukiah | — | — |
| 6 | Next Generation Heating & Cooling | 56 | 3.7★ (3) | Ukiah | Sat · Sun | — |
| 7 | Harmon Air Duct Service | 55 | 3.7★ (3) | Ukiah | Sun · Evenings | — |
| 8 | Devco Heating & Air Conditioning | 54 | 3.2★ (15) | Ukiah | — | — |
| 9 | American Radiant & Water Heating Inc. | 52 | 5.0★ (30) | Larkfield-Wikiup, 10 mi away | — | — |
| 10 | McDonald Mechanical | 52 | 5.0★ (3) | Ukiah | 24/7 | Emergencies |
The 10 best HVAC contractors in Ukiah, 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 Ukiah
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 50 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 50 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 539 S Main St, Ukiah, CA 95482
Based in Ukiah
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 33 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
- Address
- 185 Mason St, Ukiah, CA 95482
Based in Ukiah
58/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.5★ from 45 Google reviews, listed on Google as “HVAC contractor”.
- 4.5★ from 45 Google reviews
- Hours
- Mon–Fri 8 AM–12 PM · Sat–Sun closed
- Address
- 3651 Christy Ln, Ukiah, CA 95482
Based in Ukiah
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.6★ from 22 Google reviews, listed on Google as “HVAC contractor”.
- 4.6★ from 22 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
- Address
- 530 Orr Springs Rd, Ukiah, CA 95482
Based in Ukiah
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Air conditioning contractor”.
- 3.7★ from 3 Google reviews
- Hours
- Mon–Sun 8 AM–5 PM
- Address
- 265B Thomas St, Ukiah, CA 95482
Based in Ukiah
55/100CR ScoreRanked #7 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Air conditioning contractor”.
- 3.7★ from 3 Google reviews
- Hours
- Mon–Fri 7 AM–8 PM · Sat closed · Sun 7 AM–8 PM
- Address
- 3001 S State St # 6, Ukiah, CA 95482
Based in Ukiah
54/100CR ScoreRanked #8 because of its Google rating and trade focus: 3.2★ from 15 Google reviews, listed on Google as “HVAC contractor”.
- 3.2★ from 15 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 3000 N State St, Ukiah, CA 95482
Based in Larkfield-Wikiup, 10 mi away
52/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Plumber”.
- 5.0★ from 30 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
Based in Ukiah
52/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
- 5.0★ from 3 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Also serving Ukiah
7 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 |
|---|---|---|
| Air Systems Innovations Inc | 18 mi | |
| Apex Heating and Air | 18 mi | |
| Fosters Heating & Cooling | 5.0★ (1) | In Ukiah |
| Intercounty Electric | 5.0★ (1) | In Ukiah |
| John Chan Plumbing Inc | 4.7★ (35) | In Ukiah |
| MARZ Engineering | 5.0★ (5) | In Ukiah |
| Mobley Comfort Solutions Heating & Cooling Inc. | In Ukiah |
How much do HVAC contractors cost in Ukiah?
National price ranges in USD, not adjusted for Ukiah. 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 Ukiah HVAC contractors
We scored 10 Ukiah 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 Ukiah 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 Ukiah: frequently asked questions
Who is the best HVAC contractor in Ukiah?
By CR Score, the highest-ranked HVAC contractor in Ukiah, CA is Right On Time Heating And Cooling™ with a CR Score of 63/100. It has 4.9★ from 153 Google reviews. It is open 24/7. AC&R Services Heating & Cooling, Inc. (#2) and Mindful Climate HVAC (#3) follow. We ranked 10 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Ukiah?
ContractorsRanked ranks 10 HVAC contractors serving Ukiah, CA. 8 of them are based in Ukiah; the rest serve it from nearby towns. Another 7 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Ukiah are open 24/7?
2 ranked HVAC contractors in Ukiah post 24/7 hours. The highest-ranked are Right On Time Heating And Cooling™ (#1) and McDonald Mechanical (#10). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Ukiah work on weekends?
3 of 10 ranked HVAC contractors post Saturday hours and 4 post Sunday hours. The highest-ranked open Saturdays are Right On Time Heating And Cooling™ (#1), Next Generation Heating & Cooling (#6) and McDonald Mechanical (#10). 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 Ukiah?
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 Ukiah. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Ukiah HVAC contractors have?
The median Google rating among 10 rated HVAC contractors in Ukiah is 4.7★, with a median of 26 reviews. Right On Time Heating And Cooling™ has the most, 153 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 Ukiah?
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 Ukiah
- October 2026: CR Scores recalculated for 10 hvac contractors serving Ukiah.
More HVAC contractors and Ukiah pages
HVAC contractors near Ukiah
- HVAC contractors in Cloverdale, CA22 ranked
- HVAC contractors in Clearlake, CA8 ranked
- HVAC contractors in Healdsburg, CA74 ranked
- HVAC contractors in Hidden Valley Lake, CA24 ranked
- HVAC contractors in Windsor, CA96 ranked
- HVAC contractors in Larkfield-Wikiup, CA106 ranked
- HVAC contractors in Calistoga, CA106 ranked
- HVAC contractors in Sebastopol, CA109 ranked
- HVAC contractors in Santa Rosa, CA112 ranked
- HVAC contractors in Roseland, CA114 ranked
Other trades in Ukiah
- Roofers in Ukiah13 ranked
- Plumbers in Ukiah13 ranked
- Electricians in Ukiah11 ranked
- General contractors in Ukiah16 ranked
- Painters in Ukiah6 ranked
- Landscapers in Ukiah9 ranked
- Gutter installers in Ukiah7 ranked
- Home builders in Ukiah6 ranked
- All contractors in Ukiah