How Do Plumbing Companies Get Recommended by ChatGPT?

ChatGPT recommends plumbers from two pools at once: the business cards on the map it draws beside the answer, and the directories and plumbers' own pages it cites. The map is where a good plumber can look worse than it is. In the five days we captured ChatGPT's map cards, September 18 to 22, 2026, 37.6% of its answers to our plumbing questions showed at least one plumber rated under 4.0 stars, while Google AI Mode did so in 2.6% of its plumbing answers. Across all 32 questions in the Cheers Market Baseline, 98% of the ChatGPT answers that showed a sub-4-star card involved a card sourced from Yelp. A plumbing company with strong Google reviews and a neglected Yelp listing can end up looking like a risk in the one place a homeowner with water on the floor is reading.

Last verified: September 23, 2026.

Every week, Cheers asks ChatGPT, Gemini, Perplexity and Google AI Mode the same 32 home-services questions in 100 US and Canadian metros. Nine are about plumbing, and this page covers the 9,457 plumbing answers the four engines gave between August 31 and September 20, 2026. If you want those questions tracked for each of your own markets, the Cheers plumbing program does it by location.

Gemini sat in between, showing a sub-4-star plumber in 5.7% of its plumbing answers with place cards. Perplexity shows no rated cards in a form we can capture.

Why ChatGPT shows a lower rating than Google

About one in three rated business cards on ChatGPT's map (34%) linked to Yelp across all 32 questions, and the share was 46.4% of cards in US metros against 12.8% in Canada. Yelp said in August that its content integration surfaces "Yelp's trusted reviews, ratings, photos, and business details directly within the chat experience." Yelp barely shows up in ChatGPT's cited sources (0.6% of its answers), so the connection shows up on the map, not in the source list most people check.

Those Yelp cards carry thinner, lower numbers. Across all questions, 21% of ChatGPT's Yelp-sourced cards showed under 4.0 stars against 0.2% of its other cards, and the median Yelp card had 32 reviews against 168. When we matched the same business in the same city, the Yelp card averaged 4.3 stars and Google AI Mode showed 4.9. ChatGPT's other cards matched Google AI Mode's rating within 0.1 star 98% of the time, so the gap is a Yelp gap.

For plumbing specifically, 9.6% of the plumbers ChatGPT named on its map showed under 4.0 stars, the median had 157 reviews against 364 on Google AI Mode, and 50.9% of ChatGPT's plumbing answers with cards named at least one plumber with fewer than 20 reviews.

The fix is housekeeping rather than a review drive. Yelp's rule for businesses is "Don't ask anyone to review your business", so claim each branch's listing, make the name, phone, hours, service area and categories match the Google Business Profile, and answer the reviews already there. A thin listing and a missing listing are different problems, and both can be fixed in a week.

The job decides who else is in the answer

National franchise brands appeared in 36.4% of the plumbing answers that named a business and filled 11.0% of the named slots. Google AI Mode named one in 48.6% of its plumbing answers and ChatGPT in 33.1%. That average hides a split by job, which we pulled question by question: a national brand appeared in 52.7% of answers about drain cleaning or sewer line repair, 51.8% about emergency plumbing service, 50.8% about same-day repair, 49.2% about a burst or frozen pipe, 41.5% about trenchless sewer work and 33.4% about water heater repair or replacement. On repiping and fixture installation it fell to 18.8%, on tankless water heater installation to 14.6%, and on the plumbers with the strongest reviews and fair pricing to 13.1%.

This is a category share, and it leans high: some answers mention national chains only to say avoid them, and franchise names are easier for our extraction to catch than a small independent's. Even so, the direction is clear. The urgent drain, sewer and burst-pipe questions are where independents share the answer with national brands. The planned install questions and the reviews question are mostly local companies competing with other local companies. On ChatGPT alone the gap was wider still, from 51.3% of burst-pipe answers to 12.6% of tankless installation answers. Some single-question trades run higher than plumbing overall: a national brand turned up in 60.1% of our pest control answers and 40.6% of our garage door repair answers.

For an independent plumber that suggests where to spend first. Tankless installation, repiping and water heater replacement pages with real prices, warranty terms and local job photos go up against other independents. The emergency questions need everything else below.

Plumbing answers are emergency answers

Plumbing answers talked about availability far more than HVAC answers did. Mentions of 24/7 or after-hours service appeared in 63.9% of ChatGPT's plumbing answers, 75.0% of Google AI Mode's, 87.3% of Gemini's and 78.4% of Perplexity's; for HVAC the range was 48.6% to 66.2%. On the burst or frozen pipe question, every ChatGPT, Google AI Mode and Perplexity answer mentioned it (100%), and 99.7% of Gemini's did.

Licensing shows up too, mostly on two engines. Perplexity mentioned licensed, insured or bonded in 53.8% of its plumbing answers and Gemini in 40.1%, against 15.1% for ChatGPT and 14.3% for Google AI Mode. Electrical answers bring it up more often still, as how electricians get recommended by ChatGPT shows. A branch page that states its license number, its after-hours rule and the phone that actually rings at night covers both.

Google AI Mode also sends plumbing searchers to book. It linked an online booking page in 39.4% of its plumbing answers, and the rate varied by job: 62.0% on water heater repair or replacement against 26.3% on a burst or frozen pipe. A water heater is urgent but bookable; a burst pipe is a phone call. Where home service brands should publish emergency hours covers the hours side of that page in detail.

The plumbing pages that get cited

Plumbers' own websites carry a lot of these answers. Google AI Mode cited a plumbing company's site in 96.2% of its plumbing answers and Perplexity in 97.2%; Gemini did in 96.4% of the 690 plumbing answers where we captured its citations, and ChatGPT in 53.7%, alongside other directories and lists (54.6%), Angi or HomeAdvisor (32.8%) and Expertise.com (27.4%).

Which page matters. Of 25,033 citations to plumbing company websites, 35.7% went to the homepage, 19.6% to service pages, 18.3% to service-plus-city pages, 16.4% to location pages, 2.5% to booking and offer pages and 1.0% to blog posts. Service, service-plus-city and location pages took 54.3% between them, and the homepage share sat well under the 43.1% we saw across all questions.

That makes the branch and service pages the working surface for a plumbing brand. Elite Rooter, a Cheers customer, is the example we can show: Cheers standardized 249 location routes on its website, and 1,236 Google reviews have been attributed to its technicians since each location joined.

This page is the multi-engine view with ChatGPT first. For the Google-only plan, built from Google's own Search and Business Profile guidance, use Google's AI Search Playbook for Plumbing Companies. And ChatGPT still has to be able to read the pages: OpenAI says sites opted out of OAI-SearchBot "will not be shown in ChatGPT search answers."

What to do this week

Take the three branches with the most emergency calls. Look each one up on Yelp and on Google and write the rating and review count side by side. Where the Yelp listing is thin, low or unclaimed, claim it and make it match the Google Business Profile before you do anything else.

Then run two questions on ChatGPT for each branch's city: "I have a burst or frozen pipe, which plumber should I call right now?" and "who are the best plumbers for tankless water heater installation?". Note who gets named, and whether the map card shows your Yelp rating or a figure that matches Google. For every branch, the fixes land in the same places:

• The Yelp listing: claimed, with the same name, phone, hours and categories as Google.
• The service-plus-city pages for the branch's two biggest jobs: price range where you can publish one, license number, service area and the after-hours rule.
• The booking link on the Google Business Profile, pointing at that branch's scheduler for bookable jobs like water heater replacement.

The HVAC version of this analysis, where the replacement-versus-emergency split is sharpest, is in how HVAC companies get recommended by ChatGPT.

Methodology

Every week, Cheers asks ChatGPT, Gemini, Perplexity and Google AI Mode the same 32 home-services questions in 100 metro areas across the United States and Canada, and records every business each engine names, with its star rating, review count and map position where the engine shows one, and every source it cites. This analysis covers the three weeks from August 31 to September 20, 2026: 34,742 usable answers (9,434 from ChatGPT, 9,435 from Google AI Mode, 9,364 from Gemini and 6,509 from Perplexity) across 60 US and 40 Canadian metros. We excluded empty or cut-off answers, most of them from a Perplexity collection outage. Each question was asked once per city per week, so week-to-week changes include normal answer-to-answer variation. Business names were extracted automatically; a hand check of 40 answers found the extraction caught about three in four of the businesses a reader would count, so counts are lower bounds. Star ratings and review counts are the figures each engine displayed; for ChatGPT and Gemini we captured them from September 18 and September 14 onward. Findings describe associations in this sample, not how any engine ranks businesses.

The nine plumbing questions, 9,457 answers in total, were: I have a burst or frozen pipe, which plumber should I call right now; who are the best plumbers for emergency plumbing service; who are the best plumbing companies for same-day plumbing repair; which plumbing companies have the strongest reviews and fair pricing; who are the best plumbers for bathroom or kitchen repiping and fixture installation; who are the best plumbers for drain cleaning or sewer line repair; who are the best plumbers for tankless water heater installation; who are the best plumbers for trenchless sewer line inspection or replacement; and who are the best plumbers for water heater repair or replacement. ChatGPT's plumbing ratings come from 894 answers with map cards between September 18 and 22, Gemini's from 525 answers between September 14 and 22, and Google AI Mode's from 2,397 answers across the full window. National franchise brands are counted as a category from an internal list; no brand is named. The per-question figures for national brands, 24/7 mentions and booking links were computed on September 23, 2026 with the same definitions, split by question; their plumbing totals match the baseline figures above.

Sources

Every external link below was opened and checked on September 23, 2026.

• Cheers Research methodology. Cheers Market Baseline, August 31 to September 20, 2026, 34,742 answers, aggregate only. Source of every plumbing, engine, rating, brand, booking and page-type figure on this page.
• Yelp brings reservations and waitlist to ChatGPT. Yelp Official Blog, August 10, 2026. Source of the quoted description of Yelp content inside ChatGPT.
• Don't Ask for Reviews. Yelp for Business Support Center, undated. Yelp's rule against soliciting reviews.
• Overview of OpenAI crawlers. OpenAI documentation, undated. Source of the quoted consequence of opting out of OAI-SearchBot.
• Manage your local business links. Google Business Profile Help, undated. How booking links are added to a Business Profile.
• Elite Rooter case study. Cheers, proof window through September 7, 2026. Source of the 249 location routes and 1,236 team-attributed reviews.

Dylan Allen-Arnegård is the CEO & Co-Founder of Cheers, the local search platform for multi-location service businesses.