A new Google Ads campaign arrives pre-filled. Before a plumbing company types a single keyword, Google has already decided who can see the ad, at what hours, on which websites and in what language, and whether Google itself may rewrite the ad and choose a different page for it. Every one of those defaults leans toward more reach. Reach is what Google sells. A plumber needs something narrower: the calls the trucks can actually drive to.
This chapter goes through the settings to change before an Isolation campaign spends its first dollar, in the order they cost money if you skip them.
Google's Default Location Counts Anyone Interested in Your City. A Plumber Needs People Standing in It.
Pick your service area in Google Ads and Google, by default, shows the ad to two groups. The first is people who are in that area or are there regularly. The second is people anywhere who have shown interest in it: through the words they searched, a place they recently visited, or what they've been reading. Google calls this "Presence or interest" and labels it the recommended option.
For a hotel, interest from out of town is the whole business. For a plumber, it's a leak in someone else's house. A homeowner in Houston researching her mother's water heater in San Antonio is interested in San Antonio. She is not going to book a San Antonio plumber for her own sink.
The fix is one setting. In the campaign's location options, switch to Presence, which limits the ad to people who live in your area or spend time there regularly. That's the group a plumbing truck can reach.
Then draw the area the way your company already does. In our example market, almost nobody describes a service area as a circle. Roto-Rooter's San Antonio site names nine counties. Champion lists 29 towns on its locations page and four office addresses in its footer; Jon Wayne lists three. A big shop's service area is a patchwork of towns around its offices, and the targeting should be too. Google Ads lets you target cities and ZIP codes, so enter the towns or ZIP codes the dispatcher would actually say yes to, and leave out the ones where a two-hour drive eats the profit on a drain call.
"All Day" Is Google's Default Schedule. A Plumbing Ad Should Run When Someone Answers.
A new campaign is eligible to show "All day," every day of the week, on the account's time zone. Google's own help page says so plainly. For a plumbing shop with an office open 7 to 6, that means ads keep running at 11 p.m., when the phone rolls to voicemail or doesn't ring at all.
Plenty of plumbers do take calls at night. In the example market, 43 of the 213 plumbing ads we read promised 24/7 or emergency service, and every business that appeared in Google's Local Services box on our searches showed "Open 24 hours." Twenty-four-hour service is the norm among the biggest advertisers there, which makes it tempting to copy the schedule without copying the staffing. If your company answers at 2 a.m. with someone who can dispatch, your schedule should run at 2 a.m. If it doesn't, the ad shouldn't either. A tap at midnight on an ad for a shop that won't pick up until morning sends the homeowner straight to the next plumber, and the click still bills.
Match Isolation's schedule to the hours a person answers the phone. If the office picks up from 7 to 6 on weekdays and 8 to noon on Saturday, those are the ad's hours, and Sunday stays dark. Emergency hours, after-hours pricing and the fee to come out at night are a separate decision with their own campaign, and Chapter 14 covers them.
Search Partners Is On by Default, and Google Won't Tell You Which Sites Showed Your Ad
A new Search campaign also runs on Google's search partners unless you switch it off. These are outside sites that use Google's search results, and Google's help page puts their number in the thousands. What Google doesn't give you is a list. Its help page states that Google Ads doesn't provide information detailing the website where your ad appeared.
That's a hard thing to evaluate in a brand-new account. You can see the clicks and the cost under the partner network, but not which sites sent them or whether those people were standing in a flooded kitchen or idly browsing. A plumbing account that hasn't yet learned what a booked job costs on Google itself has no way to judge it.
Turn search partners off at launch. Switch off the Display Network option as well. It shows a Search campaign's ads as banners on sites and apps, to people reading a recipe or the news who never typed a word about a leak. Once Isolation has a reliable cost per booked job, search partners can be tested on its own budget against that number. The cleanest test is a copy of one proven job group, say drain cleaning, in a separate campaign with partners switched on. After a month, compare what a booked drain job cost on Google alone with what it cost once partner sites joined in. If the partner clicks booked jobs at a similar price, keep them. If they brought calls from out of state or nothing at all, the test cost one month on one job group instead of the whole budget.
Four in Ten Example-Market Residents Speak Another Language at Home. Not One Plumbing Ad We Read Was in Spanish.
According to the U.S. Census Bureau, 40.4% of San Antonio residents age five and older speak a language other than English at home, and 64.6% of the city is Hispanic or Latino. We read 446 Search ads that plumbing and multi-trade companies in the market ran over three months. Not one of them used Spanish.
Before calling that a missed market, look at what people actually type. In the example market, Keyword Planner shows "plomero cerca de mi" at 90 searches a month and "plomero" at 50; every Spanish plumbing search we could find added up to about 600 a month, against 6,600 for "plumber near me" alone. Most bilingual homeowners search in English. The Spanish lane is small, and right now nobody is in it.
The way Google handles language also just changed. Starting in September 2026, Google removed the campaign-level language setting for Search campaigns.
Google's help page now says Search ads match the language they're written in. So there's no longer a box to tick. A plumber who wants Spanish-speaking callers builds them their own ad group with ads written in Spanish, sends those clicks to a Spanish landing page, and staffs the phone with someone who can take the call in Spanish. All four pieces have to be there, or the Spanish speaker reaches a page or a person they can't use. In the example market, that ad group would start with "plomero cerca de mi," "plomero" and "plomeria" on exact match, the three Spanish searches with enough volume to show a bid range, and a page that says in Spanish what the English page says: the job, the price promise and the phone number. It's a small group, so it can share the job pages' offers rather than duplicate every one.
Your market's number will differ. Look it up for your own city on the Census Bureau's QuickFacts page, the same free source we used, before you decide whether a second language belongs in the plan.
AI Max Rewrites a Plumbing Ad and Picks Its Page by Default. It Stays Off Until the Account Books Jobs.
New Search campaigns start with AI Max switched on. Under it sit two features that are also on by default. Text customization writes new ad text drawn from your website. Final URL expansion can route the click past the job page you built and onto another page of the site Google prefers. A third piece, search term matching, widens the searches the ad can show for.
Google says outright that all three lean on bidding that learns from conversions. A new Isolation campaign runs on bids set by hand and has no conversion history yet, so AI Max is guessing with nothing to guess from. It also undoes the work of the last four chapters: hand-built job groups, exact match keywords, and ads tied to matching pages. Switch AI Max, text customization and final URL expansion off when you build Isolation. AI Max gets its own chapter later in this guide, including how to keep it from lifting a coupon price off your site and into an ad.
The rest of the launch checklist is shorter:
- Exact match only in Isolation. Broad match waits for the 30-conversion gate in Chapter 6.
- No dynamic search ads. They build ads from your site's pages, which is the same loss of control as AI Max.
- Ad rotation: "Optimize: Prefer best performing ads." Let Google favor the headline combinations that earn clicks.
- Auto-tagging on, and call reporting on. Chapter 1's tracking depends on both: auto-tagging stamps each click with the ID your field software sends back with the booked job.
- Brand searches in their own small campaign. Someone typing your company's name was going to call you anyway. Those clicks are cheap and book at a high rate, and if they sit inside Isolation they make every job group look better than it is. A separate campaign keeps that number honest, and protects the name from a competitor bidding on it.
- A small starting budget. Raise it as booked jobs prove what a job costs, not before.
Going through that list for every new plumbing account is part of what our Google Ads management team does before launch, the same way a plumber pressure-tests a line before the drywall goes up.
Next: Performance Max Waits Until Search Proves What a Plumbing Job Costs
These settings keep Isolation narrow on purpose. Chapter 10 covers the campaign type Google pushes hardest the other way, Performance Max, what it means for plumbers who run Local Services Ads, and why it waits until Search has shown what a booked job is worth.
This chapter is part of Google Ads for Plumbers, our sixteen-chapter guide for plumbing companies anywhere in the US.
