The six settings that matter on a small budget
A small plumbing or HVAC budget is lost in the defaults, which reach wider than a local trade needs. You want only people near you, searching for a job you do, while someone can answer.
| Setting | Set it to | Why |
|---|---|---|
| Location | Presence, not the default Presence or Interest | Only people in or regularly in your service area |
| Networks | Google Search only; untick search partners | Spend stays where you can see the search |
| Ad schedule | Hours someone answers | No paid clicks to a voicemail |
| Call asset | Your number, scheduled to the same hours | Phone users tap to call from the ad |
| Conversions | Calls from ads, with a minimum call length | Google counts real calls, not clicks |
| Match type | Phrase and exact, not the default broad | Your ad shows only for searches about the job |
Google's own page explains the location default:
"This default and recommended option lets you reach people who are likely to be in or regularly present in your targeted location, as well as people who have shown interest in your targeted locations." (Google Ads Help: About advanced location options)
The same page says to consider "Presence" when: "You only want to target users in specific locations and not users who may be in other locations but are still interested in your product or service." A plumber 40 miles away can't send a truck; that is the case Google describes.
Search partners are "included by default" in new Search campaigns, and you can opt out in campaign settings (Google Ads Help: About the Google Search Network).
How much Google Ads costs for plumbers and HVAC companies
At 2026 averages, a home-services search click costs about $8 and a lead about $91. LocaliQ's 2026 benchmarks, built from thousands of its customers' Google and Microsoft Ads campaigns, put the Home & Home Improvement category at a $8.33 average cost per click, 8.05% conversion rate and $90.92 average cost per lead (LocaliQ: Search advertising benchmarks 2026). Your city and trade will differ.
| Monthly budget | Clicks at $8.33 | Leads at $90.92 |
|---|---|---|
| $300 | about 36 | about 3 |
| $500 | about 60 | 5 to 6 |
| $1,000 | about 120 | about 11 |
Google spends your budget unevenly. Your "daily spending limit (two times your average daily budget for most campaigns)" applies on any one day, and the month is capped at "30.4 times your average daily budget" (Google Ads Help: About average daily budgets). A $10 daily budget can spend $20 on a busy Monday and still end the month near $304.
At three to five leads a month, split nothing: one campaign, one service, one area. Spread over four services, $500 buys a few clicks each and no answer on what works.
Which keywords a plumbing or HVAC company should bid on
Bid on the job plus intent: "water heater repair", "emergency plumber", "furnace not working", "ac repair near me". Use phrase or exact match. Broad match is the default, and Google ties it to automated bidding:
"Note: It's critical to use Smart Bidding with broad match." (Google Ads Help: About keyword matching options)
Google also says "some Smart Bidding strategies rely on a minimum volume of historical conversion data" (Google Ads Help: About Smart Bidding). At three to five leads a month there is little data, so phrase and exact match keep a small budget on the searches you chose.
Then block the searches that are not customers. Negative keywords "let you exclude search terms from your campaigns" (Google Ads Help: About negative keywords). Google notes they don't cover close variants, so add plurals and synonyms yourself. Typical first negatives for both trades: jobs, salary, apprentice, school, training, course, diy, how to, parts, supply, wholesale, and any service or brand you don't handle.
Each week, read the search terms report and add more. How to do that is in Google Ads wasted spend.
Plumbing and HVAC ad examples
A responsive search ad takes "up to 15 headlines and 4 descriptions"; headlines hold "up to 30 characters" and descriptions "up to 90 characters each" (Google Ads Help: About responsive search ads). Write for the search, the area and the next step.
| Plumbing headlines | HVAC headlines |
|---|---|
| Water Heater Repair Today | Furnace Repair Same Day |
| Licensed Plumber in [City] | AC Not Cooling? Call Now |
| Upfront Price Before We Start | Licensed HVAC Techs in [City] |
| Drain Cleaning, No Overtime | Free Estimate on New Systems |
Only claim what is true and in writing: same day, licensed, a price, a warranty. Put the phone number in a call asset, not the ad text. Google warns that a number elsewhere in the text "may lead to the disapproval of the ad" (Google Ads Help: About call assets).
Count calls, not clicks
If your customers phone rather than fill in forms, Google has to see the calls, or it can only count clicks.
Call assets let people "tap or click a button to call your business directly", and you can schedule them "only when your business is answering phone calls" (Google Ads Help: About call assets). For calls from ads, "You set a minimum call length, and every call that lasts at least that long is counted as a conversion" (Google Ads Help: About phone call conversion tracking). Set it long enough to skip hang-ups and wrong numbers.
Call reporting uses Google forwarding numbers, which are available in both the United States and Canada (Google Ads Help: About call reporting). To learn which calls became paid jobs, see tracking a lead from Google Ads to a booked job.
Google Ads or Local Services Ads?
Local Services Ads are the other Google option. You "Pay only for leads related to your business and the services you offer" (Local Services Help: Getting started with Local Services Ads), but first you pass Google's screening, which can include license, insurance and background checks. The badge and checks are in Google Guaranteed vs Google Screened. If your Local Services Ads run but nothing comes, see Local Services Ads not showing.
Do you need a Google Ads agency for a plumbing business?
Not to start: the settings above are a one-time job. The ongoing work is weekly: reading search terms, adding negatives, checking that calls are answered and counted. Pay for help when you won't do that every week. Before you sign, read marketing agency contract terms: you should own the ad account.
Example
Plumber, $300 a month
A one-truck plumber targets one county, Presence only, 7 am to 7 pm, with water heater and drain keywords in phrase match. At about $8 a click that is 36 clicks; three calls a month is in line with the averages above.
HVAC company, $1,000 a month in the shoulder season
An HVAC company spends $1,000 in October on furnace repair and tune-ups. The search terms report shows $150 went to "furnace filter" and "hvac jobs". Adding those as negatives moves that $150 back to repair searches.
Ads on, phones off
A company runs ads around the clock with nobody answering after 6 pm. Night clicks become voicemails. Matching the ad schedule and call asset hours to the office stops that.
Different for you?
- Ads running but the phone is quiet: Google Ads not getting calls.
- Clicks come but the page doesn't book: HVAC and plumbing website and landing page for Google Ads.
- Setting a budget across the busy and slow seasons: HVAC, roofing and plumbing marketing budget.
- Advertising 0% financing on a new system: advertising HVAC financing.
- Roofing instead: Google Ads for roofing companies.
- Want it run for you: Paid Ads.