Results
Plumbing: Google Ads Conversion Rate From 3.83% to 27.34%
On this page
The Google Ads conversion rate went from 3.83% to 27.34% — a 614% increase. We changed four things at once, so we cannot tell you which one caused it. YouTube launched. The website was rebuilt. New landing pages went live. The ad assets were upgraded. All in the same window.
This page exists in the form it does because of that. An earlier draft of it told a much better story: that we launched YouTube, left search alone, and watched search performance climb on its own — a clean cross-channel halo effect, measured. That would have been the most interesting number on this site. It also would have been false, because search was not left alone.
A 27.34% conversion rate is very high for paid search, and the likeliest single explanation is the landing pages rather than the video. Traffic that previously arrived on a general page and converted at 3.83% was arriving on a purpose-built page instead. That's not a small change, and attributing the result to the channel we most wanted to prove would have been the convenient reading, not the honest one.
The situation
| At the start | |
|---|---|
| Google Ads conversion rate | 3.83% |
The starting conversion rate is the critical figure and here it is. 3.83% is an ordinary, unremarkable number for paid search in home services — which is what makes 27.34% worth writing about, and also what makes a single-cause explanation implausible. Conversion rates do not multiply by seven because of awareness.
What we found
The pattern that makes YouTube worth trying:
- Search impression share already high, so more search budget would buy diminishing returns
- A brand nobody recognised in the results, competing on price by default against names people knew
- A considered purchase where the buyer has time to research before calling
- Content that could actually be filmed — a real person explaining real work, not a produced brand piece
What happened
| Metric | Before | After | Change |
|---|---|---|---|
| Google Ads conversion rate | 3.83% | 27.34% | +614% |
What else changed in the same window — all of it:
| Change | Why it could move the conversion rate on its own |
|---|---|
| YouTube launched | Awareness: people arrive at the search result already knowing the name |
| Website rebuilt | Speed, trust signals, and a clearer path to contact |
| New landing pages | Ad traffic lands on a page about the thing it searched for, not a homepage |
| Ad assets upgraded | Better-matched ads attract better-qualified clicks |
Any one of these can move a conversion rate. Three of the four act directly on the thing being measured. Only the first is an awareness effect; the other three change what happens after the click. That ordering is the reason we are not claiming this as a YouTube result.
The branded search row is the one piece of evidence that could still isolate YouTube's contribution. If searches for the company name rose during the video flight, that's an awareness signal that the landing pages cannot explain. It's worth pulling — it's the only route left to saying anything specific about the video's role.
Why we're publishing it anyway
Because the measurement problem is the point, and most case studies hide it.
YouTube is almost always judged on its own direct conversions, and on that measure it usually looks mediocre. Nobody watches a video about water heaters and immediately calls. The value shows up later, in a different channel, credited to whatever came last. Most advertisers therefore run YouTube for 60 days, see weak direct numbers, and switch it off — having paid for the awareness and left before collecting the return. More on how video actually gets measured.
That argument is real, and this engagement is not proof of it. We would have liked it to be. When a client is doing well and several improvements land together, the temptation is to credit whichever one you're trying to sell — and an agency writing its own case study is the least reliable possible narrator of which change did what.
What you can take from this page is the size of the opportunity, not its cause. An account converting at 3.83% has a great deal of room in it. Four changes made across the same quarter took it to 27.34%. If your account looks like the first number, there is very likely a version of this available to you — and you should be suspicious of anyone, including us, who tells you in advance which single change will deliver it.
What we'd do differently
Staggered the changes. This is the clearest lesson available from this engagement, and it cost us the ability to say anything specific about a good result. Launching the landing pages, waiting for the conversion rate to settle, and only then adding YouTube would have taken an extra six weeks and produced an answer instead of a number.
A geographic holdout would have made it bulletproof. Advertising in part of the service area and not a comparable part, then comparing search conversion rates across both, is the clean version of this measurement. Worth building into the next one.
Is your situation similar?
This applies if you're already running search successfully and hitting a ceiling — high impression share, rising costs as you add budget. YouTube gives you something search can't: people who know your name before they need you.
It's the wrong move if search isn't working yet, if your budget is under about $1,500 a month, or if nobody will get on camera. And it needs attribution that doesn't credit everything to last click, or you'll conclude it failed.
More on YouTube and video and marketing for plumbers · what we charge
Written by Jared DeValk, founder of Nashville Digital. Published with the client's permission. Last reviewed September 2026.