Summary
This case study shows how I improved a residential plumbing and sewer company’s Google Ads performance by reducing wasted spend, tightening targeting, and rewriting ads around trust and local intent. By removing irrelevant placements, adding nearly 100 negative keywords, and updating the creative to highlight social proof and same-day service, I made the campaign significantly more efficient. Compared with the prior period, total conversions increased by 206.67%, phone call leads increased by 183.33%, conversion rate improved by 644.48%, and cost per conversion dropped by 35.33%.
Overview
This plumbing lead generation case study shows how I improved Google Ads performance for a residential plumbing and sewer company by eliminating wasted spend, tightening geographic targeting, and rebuilding ad messaging around homeowner trust signals.
Over the measurement period, the campaign achieved:
- 206.67% increase in total conversions
- 183.33% increase in phone call leads
- 644.48% increase in conversion rate
- 35.33% reduction in cost per conversion
These improvements were achieved without increasing advertising spend. Instead, the focus was on improving traffic quality and matching the campaign more closely to homeowner intent.
About the Client
The client is a residential plumbing and sewer company serving homeowners in a competitive local market.
Like many plumbing companies, they relied heavily on phone calls generated through Google Ads. While they had built a strong reputation locally and earned hundreds of positive customer reviews, their advertising performance did not reflect the strength of the business.
The company was spending money consistently but was not generating enough qualified leads to support growth goals.
The Initial Google Ads Audit
When I first reviewed the account, I found several issues that were limiting performance. The biggest problem was traffic quality. A significant portion of the advertising budget was being consumed by users who were unlikely to become customers.
Examples included:
- Job seekers searching for plumbing careers
- Users browsing unrelated mobile applications
- Searches with weak commercial intent
- People looking specifically for competing plumbing companies
Every dollar spent on these clicks reduced the budget available for homeowners actively searching for plumbing services.
Why This Matters
- For local service businesses, lead quality is often more important than traffic volume.
- Generating 100 clicks means very little if those visitors are not ready to hire a plumber.
My goal was to help the client appear in front of homeowners who needed immediate plumbing services rather than simply generating more website visits.
Optimization Strategy
I approached the project in three phases:
Eliminate Wasted Advertising Spend
The first priority was improving traffic quality.
I reviewed placement reports and account exclusions and found several categories generating little or no value.
These included:
- Mobile gaming applications
- Educational applications
- Sensitive content placements
- Low-intent display inventory
These placements were removed to prevent future budget waste.
Negative Keyword Expansion
Next, I built a significantly larger negative keyword list.
Nearly 100 negative keywords were added to prevent ads from appearing for irrelevant searches.
Categories included:
- Employment-related searches
- Training and certification searches
- DIY plumbing searches
- Competitor-branded searches
- Non-service-related plumbing terms
This immediately improved the relevance of incoming traffic.
Rebuild Ad Messaging Around Trust
One of the most common mistakes I see in home service advertising is generic ad copy.
Many plumbing companies run headlines such as:
- Local Plumber
- Call Today
- Plumbing Services
While technically accurate, these ads fail to communicate why a homeowner should trust that company. After reviewing the client’s reputation assets, I identified several strong differentiators. The company had accumulated more than 390 five-star reviews and had earned industry recognition for service quality.
I rewrote the Responsive Search Ads to emphasize:
- 390+ five-star reviews
- Award-winning service
- Licensed and insured technicians
- Same-day service availability
- Family Owned
- Serving CITY NAME for 20+ Years
These trust signals aligned more closely with what homeowners look for when facing an urgent plumbing problem.
Refine Geographic Targeting and Bidding
The campaign was also spending budget in areas that were less likely to generate profitable work. After reviewing service area performance, I narrowed targeting to focus on the highest-value locations. This allowed more budget to be allocated toward homeowners inside the company’s preferred service radius.
I also adjusted bidding settings to support more accurate conversion learning and improve overall campaign efficiency.
Results
After implementing these changes, the campaign delivered measurable improvements across all key performance indicators.
| Metric | Improvement |
| Total Conversions | +206.67% |
| Phone Call Leads | +183.33% |
| Conversion Rate | +644.48% |
| Cost Per Conversion | -35.33% |
The most significant outcome was not simply more leads. The client generated substantially more qualified phone calls while spending less money on irrelevant traffic.
Key Takeaways for Plumbing Companies
Many underperforming plumbing campaigns do not have a traffic problem. They have a targeting problem.
In this case, success came from:
- Removing wasted spend
- Improving search relevance
- Strengthening trust-focused messaging
- Concentrating budget on profitable service areas
When these fundamentals are addressed correctly, lead generation often improves without requiring additional advertising spend.
About Christopher Berry
I’m Christopher Berry, a Google-certified digital marketing consultant specializing in lead generation for home service companies.
Over the past 30 years, I have worked with local businesses to improve Google Ads performance, generate qualified leads, and increase marketing efficiency through data-driven optimization strategies.
My focus includes:
- Lead Generation Consulting
- Google Ads Management
- Local Service Ads
- Local SEO
- AI Search Optimization
Ready to Generate More Qualified Plumbing Leads?
Let’s Talk
If your Google Ads campaigns are producing clicks but not enough booked jobs, I can help identify where your budget is being wasted and uncover opportunities to improve lead quality, conversion rates, and overall return on investment. Whether you’re looking to generate more emergency service calls, reduce cost per lead, or scale your plumbing business, let’s discuss a strategy tailored to your market and goals. Contact me today for a no-obligation consultation and marketing review.
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