HVAC and plumbing in San Francisco, CA: who shows up online
Reviews are not the gap in San Francisco. All 20 businesses are rated well, the average rating is 4.9, and the median business has 461 reviews. When we asked ChatGPT who is best, it named Cabrillo Plumbing, Heating & Air and Magic Plumbing, Heating & Cooling.
The top 20 hvac and plumbing on Google, measured
- 95%have a website
- 80%of sites use LocalBusiness markup
- 47%of sites publish llms.txt
- 80%of sites run Google Analytics or Tag Manager
- 4.9★average Google rating
- 461median Google reviews
20 businesses from the Google results for “HVAC and plumbing company in San Francisco, CA”. 19 list a website; we checked the homepage of the 15 that loaded.
Who ChatGPT recommends
“Who is the best HVAC or plumbing company in San Francisco, CA?”
- Cabrillo Plumbing, Heating & Air
- Magic Plumbing, Heating & Cooling
3 of the 20 businesses in the Google results were named.
The review leaders
| Business | Rating | Reviews | Named by ChatGPT |
|---|---|---|---|
| Jazz Heating, Air Conditioning and Plumbing | 4.9 | 4688 | No |
| Albert Nahman Plumbing, Heating, and Cooling | 4.7 | 3396 | No |
| Discount Plumbing Rooter Services | 4.9 | 3263 | No |
| Magic Plumbing Heating & Cooling | 4.9 | 1937 | Yes |
| Heise's Plumbing | 4.9 | 1805 | No |
What this means for your shop
Only 47% of audited sites have an llms.txt file, so adding one puts you ahead of most local rivals on a basic AI-readiness step.
Tap-to-call links appear on 87% of audited sites, so check that your phone number is a real link on mobile.
Magic Plumbing Heating & Cooling has 1937 reviews and ChatGPT named it, which gives you a clear benchmark to measure your own listing against.
HVAC and plumbing in San Francisco: questions
How do I get recommended by ChatGPT in San Francisco?
We asked ChatGPT who the best HVAC or plumbing company in San Francisco is, and it named Cabrillo Plumbing, Heating & Air and Magic Plumbing, Heating & Cooling. No audited site blocks AI crawlers, so keep yours open.
How many reviews do the top San Francisco companies have?
Jazz Heating, Air Conditioning and Plumbing has 4688, Albert Nahman Plumbing, Heating, and Cooling has 3396, and Discount Plumbing Rooter Services has 3263. Magic Plumbing Heating & Cooling has 1937 and Heise's Plumbing has 1805.
What are most local HVAC and plumbing sites missing?
The biggest gap is llms.txt, which only 47% of the 15 audited sites have. LocalBusiness schema and analytics are each at 80%, and mobile support is at 87%.
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 San Francisco, CA” on October 18, 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.