HVAC and plumbing in Detroit, MI: who shows up online
Detroit's HVAC and plumbing market is solid on the basics. All 14 audited sites use HTTPS and work on mobile, and the median business has 263 reviews. The gaps are in structured data, with 57% using LocalBusiness schema and 36% using llms.txt.
The top 19 hvac and plumbing on Google, measured
- 84%have a website
- 57%of sites use LocalBusiness markup
- 36%of sites publish llms.txt
- 79%of sites run Google Analytics or Tag Manager
- 4.6★average Google rating
- 263median Google reviews
19 businesses from the Google results for “HVAC and plumbing company in Detroit, MI”. 16 list a website; we checked the homepage of the 14 that loaded.
Who ChatGPT recommends
“Who is the best HVAC or plumbing company in Detroit, MI?”
- Cregger Plumbing, Heating, Cooling & Electrical
- Levine & Sons Plumbing, Heating & Cooling
- Thornton & Grooms Heating, Cooling & Plumbing
- Hoover Electric, Plumbing, Heating & Cooling
- FLAME Heating, Cooling, Plumbing & Electrical
3 of the 19 businesses in the Google results were named. 2 recommendations were for businesses outside that list.
The review leaders
| Business | Rating | Reviews | Named by ChatGPT |
|---|---|---|---|
| Cregger Plumbing, Heating, Cooling & Electrical | 4.9 | 7198 | Yes |
| Levine & Sons Plumbing, Heating & AC | 4.8 | 5759 | Yes |
| FLAME Heating, Cooling, Plumbing, Electrical | 4.7 | 4585 | Yes |
| Great Dane Heating, Cooling, Electrical, & Plumbing | 4.8 | 3490 | No |
| Edwards Plumbing & Heating | 4.7 | 2651 | No |
What this means for your shop
Only 57% of audited sites have LocalBusiness schema, so adding it puts your site ahead of the rest of the market.
None of the audited sites block AI crawlers, and 36% publish an llms.txt file, so adding one is an easy way to match them.
Cregger Plumbing, Heating, Cooling & Electrical has 7198 reviews at a 4.9 rating, while the median business has 263, so review volume is the real gap.
HVAC and plumbing in Detroit: questions
How do I get recommended by ChatGPT in Detroit?
We asked ChatGPT who the best company is. It named 3 businesses from our sample and 2 from outside it. The three sampled names all have 4585 or more reviews.
How many reviews do the Detroit leaders have?
Cregger Plumbing, Heating, Cooling & Electrical has 7198 at 4.9. Levine & Sons Plumbing, Heating & AC has 5759 at 4.8. FLAME Heating, Cooling, Plumbing, Electrical has 4585 at 4.7.
What are most local sites missing?
Structured data and AI-readable files. Only 57% have LocalBusiness schema and 36% have llms.txt. Of 19 businesses, 16 have a website.
Where does your business stand?
This page shows the market. The free diagnostic shows you: 42 points on your site, your Google profile and what ChatGPT and Claude say about you, with the competitors beating you by name. Usually in under an hour.
Method: HopperCat pulled the top Google results for “HVAC and plumbing company in Detroit, MI” on October 20, 2026, checked each business homepage for HTTPS, mobile setup, LocalBusiness markup, llms.txt, AI-crawler rules and analytics, and asked ChatGPT the question above with web search on. Ratings and review counts are Google's at that date.