HVAC Market Report: Oakland County, MI
144 HVAC companies, 86,092 Google reviews, and a 4.80 average rating. A market where one company holds 15,720 reviews — here's what the data reveals.
Market snapshot
Data: Google Places API & US Census Bureau · Updated 2026-04-02Top hvacs by Google reviews
Ranked by review count. Ratings and review counts from Google as of 2026-04-02.
| # | Business | City | Rating | Reviews |
|---|---|---|---|---|
| 1 | Thornton & Grooms | Farmington Hills | 4.9 | 15,720 |
| 2 | Cregger Plumbing, Heating & Cooling | Ferndale | 4.9 | 6,577 |
| 3 | Andy's Statewide | Orion | 4.8 | 6,383 |
| 4 | Levine & Sons Plumbing, Heating & AC | Southfield | 4.8 | 5,422 |
| 5 | Hoover Electric Plumbing Heating Cooling | Troy | 4.8 | 5,211 |
| 6 | Kotz Heating, Cooling and Plumbing | Waterford Township | 4.9 | 5,098 |
| 7 | FLAME Heating, Cooling, Plumbing, Electrical | Warren | 4.7 | 3,547 |
| 8 | AJ Danboise | Farmington Hills | 4.8 | 2,871 |
| 9 | Robin Aire Service Company | Wixom | 4.9 | 2,665 |
| 10 | Edwards Plumbing & Heating | Southfield | 4.7 | 2,453 |
| 11 | Carter's Plumbing, Heating & Cooling of Bloomfield Hills | Bloomfield Hills | 4.9 | 1,976 |
| 12 | Randazzo Heating & Cooling | Farmington Hills | 4.9 | 1,957 |
| 13 | Royal Oak Heating, Cooling, & Electrical | Troy | 4.8 | 1,662 |
| 14 | Harriman Heating & Air Conditioning | Farmington Hills | 4.8 | 1,585 |
| 15 | Ehlers Heating & Cooling | Livonia | 4.9 | 1,238 |
HVACs by city
How providers are distributed across Oakland County.
| City | Count | Avg rating | Total reviews |
|---|---|---|---|
| Troy | 18 | 4.8 | 8,217 |
| Waterford Township | 16 | 4.8 | 8,903 |
| Farmington Hills | 14 | 4.9 | 23,864 |
| Rochester Hills | 11 | 4.8 | 1,690 |
| Southfield | 9 | 4.8 | 8,840 |
| Oxford | 8 | 4.8 | 580 |
| Royal Oak | 7 | 4.9 | 763 |
| Birmingham | 6 | 5 | 1,230 |
| Village of Clarkston | 6 | 4.8 | 692 |
| Ferndale | 4 | 4.9 | 7,678 |
| Orion Township | 4 | 4.8 | 1,652 |
| Novi | 4 | 4.7 | 711 |
| Madison Heights | 4 | 4.8 | 568 |
| Pontiac | 4 | 4.4 | 101 |
| Rochester | 3 | 5 | 282 |
| Warren | 2 | 4.9 | 3,768 |
| Wixom | 2 | 4.9 | 2,812 |
| Bloomfield Hills | 2 | 4.8 | 2,941 |
| Farmington | 2 | 4.9 | 425 |
| Commerce Township | 2 | 4.8 | 382 |
| Lake Orion | 2 | 4.2 | 68 |
| Orion | 1 | 4.8 | 6,383 |
| Livonia | 1 | 4.9 | 1,238 |
| White Lake | 1 | 4.7 | 419 |
| Oak Park | 1 | 4.8 | 324 |
| Independence Township | 1 | 5 | 316 |
| Redford Township | 1 | 4.9 | 286 |
| Sylvan Lake | 1 | 4.8 | 262 |
| Auburn Hills | 1 | 4.7 | 230 |
| Commerce Charter Twp | 1 | 4.9 | 198 |
| Holly | 1 | 4.9 | 126 |
| Waterford | 1 | 4.9 | 73 |
| Shelby Township | 1 | 4 | 42 |
| Ortonville | 1 | 5 | 23 |
| Bloomfield Township | 1 | 5 | 5 |
Market analysis
Geographic concentration
Troy leads with 18 HVAC companies, followed by Waterford (16), Farmington Hills (14), and Rochester Hills (11). The distribution tracks population density along the I-75 and M-59 corridors. However, review concentration tells a different story — Thornton & Grooms alone holds 18% of all HVAC reviews in the county.
Rating landscape
At 4.80 average, Oakland County HVAC is competitive but overshadowed by extreme review concentration at the top. Thornton & Grooms dominates with 15,720 reviews — more than the next two competitors combined (Cregger at 6,577 and Andy's Statewide at 6,383). The average company has 598 reviews, but that figure is heavily inflated by the top players. Strip out the top 5 and the median drops dramatically.
Demographics
Market gaps
- Thornton & Grooms dominates with 15,720 reviews — more than the next two combined. Massive concentration at top
- Most mid-tier HVAC companies have under 300 reviews, making them invisible against the top 5 providers
- Few HVAC companies in the county leverage seasonal content or emergency-specific GBP posts despite cyclical demand
- Northern Oakland communities (Oxford, Lake Orion, Clarkston) have limited HVAC provider density relative to their housing stock
What this data means for your HVAC company
HVAC is a market where timing is everything — homeowners search when their system breaks. The data shows who's capturing those high-intent moments and who's being skipped over.
Thornton & Grooms' 15,720 reviews seem unbeatable — but HVAC is hyperlocal
Thornton & Grooms has more reviews than the next two HVAC companies combined. That sounds insurmountable, but HVAC is the most proximity-driven home service vertical. Google prioritizes companies near the searcher's location. A homeowner in Waterford searching "furnace repair near me" at 10 PM will see local results first. If you dominate your immediate service area with reviews, GBP activity, and local content, you can outrank the giants for the searches that matter most.
598 average reviews is inflated — the real benchmark is much lower
The 598 average is skewed by Thornton & Grooms, Cregger, and Andy's Statewide. Remove the top 5 and the typical Oakland County HVAC company has far fewer. That means mid-tier companies with 200-500 reviews are competing against each other — not against Thornton. Getting to 750+ reviews would put you in elite company and dramatically change your map pack visibility across multiple cities.
Seasonal content is a missed opportunity across the board
HVAC demand spikes in June-August (AC) and November-February (heating). Yet almost no HVAC companies in Oakland County post seasonal GBP updates, publish furnace maintenance guides in October, or create AC emergency pages before summer. The companies that align their content calendar with the HVAC demand cycle capture search traffic exactly when homeowners are ready to buy.
Emergency searches are the highest-value traffic
"AC not working," "furnace repair near me," and "emergency HVAC" are the searches that convert same-day. Most HVAC companies in the county have no dedicated emergency landing pages and don't mention 24/7 service in their GBP. In a county with $91K median household income, these homeowners are willing to pay premium rates for immediate service — if they can find you.
How we help HVAC companies dominate local search
We build local visibility systems for HVAC companies — optimized for the way homeowners actually search when their furnace dies at 2 AM or their AC quits in July.