64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 2,591 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,591 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 28930 Wall St, Wixom, MI 48393
Best HVAC Contractors in South Lyon, MI (2026)
471 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in South Lyon: Robin Aire Service Company, CR Score 64/100; 4.9★ from 2,591 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Lakeside Service Co., posts 24/7 hours; ranked #2 of 471.
- 4
Most-reviewed: Thornton & Grooms, 15,592 Google reviews at 4.9★, the most of 471 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
471 South Lyon HVAC contractors are ranked here by CR Score, from ten published factors. 158 are open 24/7, 299 open Saturdays and 225 open Sundays, based on posted hours. The median Google rating is 4.8★ across 471 rated businesses.
Top 10 HVAC contractors in South Lyon at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Robin Aire Service Company | 64 | 4.9★ (2,591) | Wixom, 7 mi away | 24/7 | Overall |
| 2 | Lakeside Service Co. | 64 | 4.9★ (2,337) | Brighton, 8 mi away | 24/7 | Emergencies |
| 3 | Randazzo Heating & Cooling | 62 | 4.9★ (1,580) | Farmington Hills, 12 mi away | 24/7 | — |
| 4 | Thornton & Grooms | 62 | 4.9★ (15,592) | Farmington Hills, 12 mi away | Sat · Evenings | Most reviews |
| 5 | Matheson Heating Air Plumbing | 62 | 4.9★ (1,350) | Milford, 12 mi away | 24/7 | — |
| 6 | Crain Heating and Cooling | 62 | 4.9★ (1,422) | Livonia, 13 mi away | 24/7 | — |
| 7 | Mrs. Michael Plumbers, Electricians, and HVAC Technicians | 62 | 4.7★ (2,618) | Howell, 12 mi away | 24/7 | — |
| 8 | Heinanen Engineering, Inc. | 62 | 4.9★ (328) | South Lyon | Sat · Sun · Evenings | — |
| 9 | Haley Mechanical - Brighton | 61 | 4.9★ (374) | Brighton, 7 mi away | 24/7 | — |
| 10 | Levine & Sons Plumbing, Heating & AC | 61 | 4.8★ (5,322) | Southfield, 19 mi away | 24/7 | — |
The 471 best HVAC contractors in South Lyon, 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 Brighton, 8 mi away
64/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,337 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4367 S Old US Hwy 23, Brighton, MI 48114
Based in Farmington Hills, 12 mi away
62/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 1,580 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,580 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 23485 Industrial Park Dr, Farmington Hills, MI 48335
Based in Farmington Hills, 12 mi away
62/100CR ScoreRanked #4 because of its Google rating and review volume: 4.9★ from 15,592 Google reviews, the most in South Lyon.
- 4.9★ from 15,592 Google reviews
- Hours
- Mon–Fri 6 AM–7 PM · Sat 7 AM–4 PM · Sun closed
- Address
- 24565 Hallwood Ct, Farmington Hills, MI 48335
Based in Milford, 12 mi away
62/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 1,350 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,350 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1965 Best Dr, Commerce Township, MI 48390
Based in Livonia, 13 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 1,422 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,422 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 37493 Schoolcraft Rd, Livonia, MI 48150
Based in Howell, 12 mi away
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.7★ from 2,618 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 2,618 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1150 N Old US 23, Howell, MI 48843
Based in South Lyon
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 328 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 328 Google reviews
- Hours
- Mon–Wed 8 AM–12 AM · Thu–Fri closed · Sat–Sun 8 AM–12 AM
- Address
- 350 S Lafayette St, South Lyon, MI 48178
Based in Brighton, 7 mi away
61/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 374 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 374 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 202 Appian Way, Brighton, MI 48116
Based in Southfield, 19 mi away
61/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.8★ from 5,322 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 5,322 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 23820 Telegraph Rd, Southfield, MI 48033
Based in South Lyon
61/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.7★ from 180 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 180 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 12577 Bowers Ln, South Lyon, MI 48178
Based in Brighton, 3 mi away
61/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 138 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 138 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Plymouth, 13 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 4,390 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 4,390 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 41170 Joy Rd, Plymouth, MI 48170
Based in Brighton, 8 mi away
61/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 684 Google reviews, listed on Google as “Heating contractor”.
- 5.0★ from 684 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 4023 Old US 23 #103, Brighton, MI 48114
Based in Novi, 9 mi away
61/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 270 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 270 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 43422 W Oaks Dr #203, Novi, MI 48377
Based in Livonia, 15 mi away
61/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 1,199 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,199 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 30885 Eight Mile W, Livonia, MI 48152
Based in Milford, 8 mi away
61/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 280 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 280 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2530 E Buno Rd, Milford, MI 48381
Based in Ann Arbor, 3 mi away
61/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 92 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 92 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Ann Arbor, 17 mi away
61/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 746 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 746 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6728 Anna Dr, Van Buren Township, MI 48111
Based in Brighton, 6 mi away
60/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 2,657 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 2,657 Google reviews
- Hours
- Mon–Fri 9 AM–5:30 PM · Sat 9 AM–2 PM · Sun closed
- Address
- 8636 Whitmore Lake Rd, Brighton, MI 48116
Based in Howell, 15 mi away
60/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 671 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 671 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1085 Grand Oaks Dr, Howell, MI 48843
Based in Auburn Hills, 20 mi away
60/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 1,067 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 1,067 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1032 W Huron St, Waterford Township, MI 48328
#23 Hi-Tech, Inc.
Based in Milford, 11 mi away
60/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 271 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 271 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3224 S Duck Lake Rd, Highland Township, MI 48356
Based in Ann Arbor, 15 mi away
60/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 538 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 538 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5204 Jackson Rd Suite 150, Ann Arbor, MI 48103
Based in Farmington Hills, 11 mi away
60/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 261 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 261 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 27280 Haggerty Rd C-19, Farmington Hills, MI 48331
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 471 ranked HVAC contractors here; the rest are on their profiles.
Also serving South Lyon
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 |
|---|---|---|
| A1 Air Conditioning & Heating | 5.0★ (2) | 19 mi |
| AirPro Heating & Cooling, LLC | 4.9★ (40) | 11 mi |
| Alltemp Heating & Cooling | 5.0★ (2) | 17 mi |
| Comfort Mechanical Heating and Cooling | 4.9★ (112) | 16 mi |
| D&D AC and Furnace Heating Repair | 5.0★ (2) | 11 mi |
| Duffy's Heating & Air Conditioning | 5.0★ (2) | 12 mi |
| Edwards Plumbing & Heating | 4.3★ (2,053) | 22 mi |
| Ehlers Heating & Cooling | 5.0★ (2) | 11 mi |
| Harper Mechanical Inc | 5.0★ (2) | 15 mi |
| Hines Heating & Cooling LLC | 5.0★ (64) | 13 mi |
| Jerry's Heating & Cooling | In South Lyon | |
| Joe's Heating | 4.5★ (2) | 17 mi |
| JR Heating and Cooling | 5.0★ (2) | 14 mi |
| Kotz Heating, Cooling and Plumbing | 4.9★ (5,035) | 21 mi |
| McGraw Mechanical | 4.3★ (12) | In South Lyon |
| On-Time Heating & Air Conditioning Services | 1.0★ (2) | 18 mi |
| Quality Aire Systems | 5.0★ (2) | 13 mi |
| Trusted Air Duct Cleaning | 5.0★ (2) | 13 mi |
| Westland Furnace and Air Conditioning | 3.0★ (2) | 19 mi |
| Zilka Heating and Cooling | 4.8★ (260) | 19 mi |
How much do HVAC contractors cost in South Lyon?
National price ranges in USD, not adjusted for South Lyon. 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 Michigan
In Michigan, Michigan LARA, Bureau of Construction Codes licenses Mechanical contractor licenses.
- 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 Michigan
In Michigan, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
How we ranked South Lyon HVAC contractors
We scored 471 South Lyon 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 South Lyon 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 South Lyon: frequently asked questions
Who is the best HVAC contractor in South Lyon?
By CR Score, the highest-ranked HVAC contractor in South Lyon, MI is Robin Aire Service Company with a CR Score of 64/100. It has 4.9★ from 2,591 Google reviews. It is open 24/7. Lakeside Service Co. (#2) and Randazzo Heating & Cooling (#3) follow. We ranked 471 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in South Lyon?
ContractorsRanked ranks 471 HVAC contractors serving South Lyon, MI. 3 of them are based in South Lyon; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in South Lyon are open 24/7?
158 ranked HVAC contractors in South Lyon post 24/7 hours. The highest-ranked are Robin Aire Service Company (#1), Lakeside Service Co. (#2) and Randazzo Heating & Cooling (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in South Lyon work on weekends?
299 of 471 ranked HVAC contractors post Saturday hours and 225 post Sunday hours. The highest-ranked open Saturdays are Robin Aire Service Company (#1), Lakeside Service Co. (#2) and Randazzo Heating & Cooling (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check an HVAC contractor's license in Michigan?
In Michigan, Michigan LARA, Bureau of Construction Codes handles licensing and covers Mechanical contractor licenses.
How much does ac replacement cost in South Lyon?
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 South Lyon. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do South Lyon HVAC contractors have?
The median Google rating among 471 rated HVAC contractors in South Lyon is 4.8★, with a median of 31 reviews. Thornton & Grooms has the most, 15,592 reviews, and ranks #4. 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 South Lyon?
In Michigan, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
Update log for South Lyon
- October 2026: CR Scores recalculated for 471 hvac contractors serving South Lyon.
- October 2026: 2 duplicate listings merged.
More HVAC contractors and South Lyon pages
HVAC contractors near South Lyon
- HVAC contractors in Whitmore Lake, MI350 ranked
- HVAC contractors in Wixom, MI656 ranked
- HVAC contractors in Brighton, MI317 ranked
- HVAC contractors in Northville, MI733 ranked
- HVAC contractors in Novi, MI750 ranked
- HVAC contractors in Milford, MI510 ranked
- HVAC contractors in Walled Lake, MI716 ranked
- HVAC contractors in Plymouth, MI722 ranked
- HVAC contractors in Ann Arbor, MI328 ranked
- HVAC contractors in Canton, MI647 ranked
Other trades in South Lyon
- Roofers in South Lyon797 ranked
- Plumbers in South Lyon376 ranked
- Electricians in South Lyon304 ranked
- General contractors in South Lyon447 ranked
- Painters in South Lyon160 ranked
- Landscapers in South Lyon241 ranked
- Handymen in South Lyon105 ranked
- Kitchen remodelers in South Lyon327 ranked
- Bathroom remodelers in South Lyon313 ranked
- Flooring contractors in South Lyon287 ranked
- Tile installers in South Lyon54 ranked
- Drywall contractors in South Lyon15 ranked
- Concrete contractors in South Lyon263 ranked
- Fence contractors in South Lyon62 ranked
- Deck builders in South Lyon149 ranked
- Siding contractors in South Lyon355 ranked
- Window installers in South Lyon344 ranked
- Gutter installers in South Lyon187 ranked
- Insulation contractors in South Lyon90 ranked
- Solar installers in South Lyon49 ranked
- Garage door repair companies in South Lyon106 ranked
- Foundation repair companies in South Lyon120 ranked
- Tree services in South Lyon383 ranked
- Masonry contractors in South Lyon184 ranked
- Water damage restoration companies in South Lyon519 ranked
- Home builders in South Lyon397 ranked
- Demolition contractors in South Lyon81 ranked
- All contractors in South Lyon