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South Lyon, Oakland County, Michigan
11 HVAC companies with a South Lyon address, scored out of 100. Updated October 2026.
As of October 2026, the highest-scoring HVAC company in South Lyon, MI on TownAnswer is Heinanen Engineering, Inc., with a score of 74 out of 100 (4.9 stars from 333 Google reviews). Next are South Lyon Heating And Cooling (69) and Alison Mechanical Heating and Cooling (65). We scored 11 HVAC companies with a South Lyon address.
Our October 2026 pull of Google Maps found 11 HVAC companies with a South Lyon mailing address. 9 list a website, 10 have claimed their Google listing and 0 take online bookings.
None belongs to a business with three or more Michigan locations in our data.
Every business is scored by the same rules. A business cannot pay for a higher place.
The most-reviewed HVAC company in South Lyon is Heinanen Engineering, Inc. with 333 Google reviews. The median rating among scored listings is 4.9 stars.
Highest score first. Tap a name for its website, or Score details for the full breakdown.
The 100-point TownAnswer score. Every HVAC company here is checked on the same 5 parts: reputation (26 points), review volume (18), focus (14), profile (22) and verified owner (20). Nobody pays to rank. How we rank
Claimed on Google333 reviews
Heinanen Engineering, Inc. is at 350 S Lafayette St, South Lyon, MI 48178. Its Google category is "HVAC contractor", with Air conditioning contractor, Air conditioning repair service, Furnace repair service as extra categories. After we adjust for review count, its 4.9 stars count as 4.89.
Open 24 hoursWeekend hoursClaimed on Google223 reviews
You will find South Lyon Heating And Cooling at 12577 Bowers Ln, South Lyon, MI 48178. That is 2.3 miles northwest of the South Lyon city center. Google files it under "HVAC contractor" and also Air conditioning contractor, Air conditioning repair service, Air conditioning system supplier. Its 4.7 stars rest on 223 reviews, which our method reads as 4.69 after the review-count adjustment.
Claimed on Google
You will find Alison Mechanical Heating and Cooling at 10071 Colonial Industrial Dr, South Lyon, MI 48178. It sits about 2.0 miles west of central South Lyon. Google files it under "HVAC contractor" and also Contractor, Heating contractor. Its 4.9 stars rest on 27 reviews, which our method reads as 4.78 after the review-count adjustment.
Open 24 hoursWeekend hoursClaimed on Google
Hauser is at 4609 Six Mile Rd, South Lyon, MI 48178. It sits about 3.7 miles south of central South Lyon. Its Google category is "HVAC contractor", with Heating contractor as extra categories. Its 4.6 stars rest on 74 reviews, which our method reads as 4.60 after the review-count adjustment.
Opens before 7 AMOpen after 8 PMWeekend hoursComes to youClaimed on Google
Cornerstone Mechanical LLC is a service-area business. Google does not show its street address, and its map pin sits in South Lyon. It sits about 0.8 miles north of central South Lyon. Google files it under "HVAC contractor" and also Service establishment. After we adjust for review count, its 5.0 stars count as 4.79.
★ 4.9 57 Google reviews
Claimed on Google
You will find B's Custom Mechanical at 13325 12 Mile Rd, South Lyon, MI 48178. That is 2.1 miles northwest of the South Lyon city center. Google files it under "HVAC contractor" and also Air conditioning contractor, Air conditioning repair service, Furnace repair service. Its 4.9 stars rest on 57 reviews, which our method reads as 4.83 after the review-count adjustment.
Claimed on Google
Air Wizards HVAC is at 25850 Carriage Ln, South Lyon, MI 48178. It sits about 1.2 miles northeast of central South Lyon. Google files it under "HVAC contractor". Its 5.0 stars rest on 14 reviews, which our method reads as 4.78 after the review-count adjustment.
Open 24 hoursWeekend hoursClaimed on Google
McGraw Mechanical lists its address as 12577 Bowers Ln, South Lyon, MI 48178. That is 2.3 miles northwest of the South Lyon city center. Its Google category is "HVAC contractor". Its 4.3 stars rest on 12 reviews, which our method reads as 4.45 after the review-count adjustment.
Open 24 hoursWeekend hoursClaimed on Google
Neighborhood Heating & Cooling lists its address as 12577 Bowers Ln #3, South Lyon, MI 48178. It sits about 2.3 miles northwest of central South Lyon. Its Google category is "Air conditioning contractor". Its 5.0 stars rest on 2 reviews, which our method reads as 4.62 after the review-count adjustment.
Claimed on Google
You will find Michigan Temperature Services LLC at 11428 Arrowhead Dr #9539, South Lyon, MI 48178. It sits about 1.8 miles southwest of central South Lyon. Its Google category is "Air conditioning contractor". After we adjust for review count, its 4.0 stars count as 4.43.
★ 3.3 28 Google reviews
You will find Brumley Heating & Cooling at 730 N Hagadorn St, South Lyon, MI 48178. That is 0.5 miles northwest of the South Lyon city center. Google files it under "Heating contractor". Its 3.3 stars rest on 28 reviews, which our method reads as 3.74 after the review-count adjustment. The owner has not claimed the Google listing.
| # | Business | Score | Grade | Rating | Reviews | Street |
|---|---|---|---|---|---|---|
| 1 | Heinanen Engineering, Inc. | 74 | B | 4.9 | 333 | 350 S Lafayette St |
| 2 | South Lyon Heating And Cooling | 69 | B- | 4.7 | 223 | 12577 Bowers Ln |
| 3 | Alison Mechanical Heating and Cooling | 65 | B- | 4.9 | 27 | 10071 Colonial Industrial Dr |
| 4 | Hauser | 64 | C+ | 4.6 | 74 | 4609 Six Mile Rd |
| 5 | Cornerstone Mechanical LLC | 64 | C+ | 5.0 | 16 | service area |
| 6 | B's Custom Mechanical | 63 | C+ | 4.9 | 57 | 13325 12 Mile Rd |
| 7 | Air Wizards HVAC | 59 | C | 5.0 | 14 | 25850 Carriage Ln |
| 8 | McGraw Mechanical | 57 | C | 4.3 | 12 | 12577 Bowers Ln |
| 9 | Neighborhood Heating & Cooling | 52 | C | 5.0 | 2 | 12577 Bowers Ln #3 |
| 10 | Michigan Temperature Services LLC | 50 | C | 4.0 | 5 | 11428 Arrowhead Dr #9539 |
| 11 | Brumley Heating & Cooling | 32 | C- | 3.3 | 28 | 730 N Hagadorn St |
South Lyon has 11,950 residents and 4,976 households (ACS 2024 5-year estimates for South Lyon city). 36.2 percent of its homes were built before 1980, and the median home was built in 1,991.
81.2 percent of homes are owner-occupied. The median home value is $294,600. Older housing stock tends to need more plumbing, roofing, electrical and water damage work, so these figures help explain local demand. They do not measure it.
Our October 2026 data has 11 HVAC companies with a South Lyon mailing address: 9.2 per 10,000 residents. A mailing city can differ from the city limits, so treat the ratio as a guide.
Heating and cooling work in Michigan needs a mechanical contractor licence from LARA. Check the company on LARA Verify a License.
A new furnace or air conditioner should be sized for your house. Ask whether the contractor runs a load calculation (often called Manual J) or sizes by the old unit.
Ask for a written quote that lists the model numbers, the removal of the old unit, the permit and any duct or electrical work.
Many equipment warranties need registration within a set time after install. Ask who registers it.
Ask what a tune-up includes. A furnace check before winter is common in Michigan.
| City | Distance | HVAC Companies | Top score |
|---|---|---|---|
| New Hudson | 4.6 mi northeast | 2 | 61 |
| Whitmore Lake | 5.8 mi southwest | 3 | 65 |
| Northfield Township | 6.3 mi southwest | 1 | 50 |
| Wixom | 7.6 mi northeast | 11 | 78 |
| Milford Township | 7.7 mi north | 1 | 69 |
| Brighton Township | 7.7 mi northwest | 1 | 61 |
| Brighton | 8.2 mi northwest | 17 | 80 |
| Novi | 8.6 mi east | 17 | 75 |
Personal Injury Attorneys 3Water Damage Restoration Companies 2Mold Remediation Companies 1Mold Inspection and Testing Companies 1Plumbers 6Roofers 3Electricians 3Dentists 17Med Spas 3Pilates and Fitness Studios 10Photographers 7Coffee Cart Vendors and Mobile Coffee Bars 2Cafés and Coffee Shops 8Restaurants 18Real Estate Brokerages 9Dance Studios 3Everything in South LyonHVAC Companies in Oakland County
Our October 2026 data lists 11 HVAC companies with a South Lyon mailing address. 11 have a Google rating and are scored. A business can be missing, so treat the count as a floor.
Heinanen Engineering, Inc. has the highest TownAnswer score in South Lyon: 74 out of 100, from 4.9 stars and 333 Google reviews. Scores change when listings change.
Reputation (26 points) is the Google rating adjusted for how many reviews it rests on. Review volume adds up to 18, how closely the business matches the trade up to 14, profile facts such as website, phone, hours, photos and a claimed listing up to 22, and a profile the owner verified with TownAnswer adds 20.
No. Every business is scored by the same rules, and no payment changes a score or a place on a list.
Nearby city pages: New Hudson (4.6 miles), Whitmore Lake (5.8 miles), Northfield Township (6.3 miles), Wixom (7.6 miles).
Does the company hold a Michigan mechanical contractor licence? Will they do a load calculation before they size a new system? Is the quote for the installed system, with removal and permit included?
South Lyon is in Oakland County. See every HVAC company in the county on the Oakland County page.
We refresh the data from Google Maps and change the date on the page only when the data changes. This version uses data read in October 2026.
TownAnswer ranks local businesses by one published method. Businesses cannot pay to change their rank. Ratings and review counts come from Google Maps, read in October 2026. Details change, so confirm hours, prices and licences with each business. How we rank.
