The Adjacent Service Rule: Why a Cleaning Company Should Never Pay for Pressure Washing Clicks

One negative keyword phrase. One afternoon. One permanently eliminated wrong-audience category. The adjacent service rule — and why it matters more in home services than anywhere else.

The Rule

Every home services business has one or more adjacent service categories that share search vocabulary without sharing customers.
A house cleaner and a pressure washer both get searched using the word ‘cleaning’. A painter and a mural artist both get searched using the word ‘painting’. An HVAC company and a plumber both get searched using the word ‘repair’.
The adjacent service rule: identify every service category that shares your vocabulary but that you don’t offer.
Add phrase-level negative keywords for that category’s specific descriptors. Apply them at the account level so they block those searches across every campaign, now and in the future.
One afternoon. Permanent fix.

Find every adjacent service. One phrase negative each. Applied at the account level. Never pay for it again.

The Cleaning Company Example

A PA house cleaning company had $54+ per quarter going to pressure washing searches before their negative keyword list was built. ‘Exterior cleaning’, ‘power wash near me’, ‘driveway cleaning’, ‘deck power washing’ — all these triggered the house cleaning ads.
The homeowner clicking those ads wanted someone to pressure wash their driveway. They landed on a maid service website. They left immediately. The click cost the same $3-6 as a genuine house cleaning lead.
The fix: add ‘pressure wash’, ‘power wash’, ‘exterior clean’, ‘driveway’, ‘deck cleaning’, ‘sidewalk cleaning’ as phrase-level negatives at the account level.
Every future search containing those words — regardless of what else is in the query — is now blocked.
The exclusion took less than 30 minutes. It applies permanently. The quarterly search term review catches any new pressure washing variants that appear so they can be added to the list.

Building the Adjacent Service Map

For any home services business, the first step is mapping every adjacent service category:
House cleaning → carpet cleaning, pressure washing, window cleaning, junk removal, organizing
HVAC → plumbing, electrical, appliance repair, duct cleaning (if not offered), water heater
Painting → murals, wallpaper, decorating, art instruction, fence staining
Gutters → roofing, siding, fascia repair, chimney
Epoxy flooring → carpet installation, tile installation, hardwood
For each adjacent category, identify the 3-5 most common search descriptors. Add them as phrase-level negatives. Done.

Why Account-Level Matters

Negative keywords can be applied at the campaign level or the account level. Campaign-level negatives only block searches in that specific campaign. Account-level negatives block them everywhere — including new campaigns you create in the future.
For adjacent service exclusions, account level is always the right choice. A pressure washing search should never trigger a house cleaning ad — not in the residential campaign, not in the commercial campaign, not in a new campaign launched next year.

The Quarterly Update

Adjacent service waste isn’t static. New variants appear as Google’s algorithm expands match types, as new competitors enter the market, and as seasonal searches bring new vocabulary.
A quarterly review of the search terms report adds new adjacent service variants to the existing exclusion list.
The baseline list does the heavy lifting. The quarterly update catches what’s new. Together, they keep adjacent service waste at zero.

Frequently Asked Questions

What is the difference between account-level and campaign-level negative keywords?

Campaign-level negatives apply only to a specific campaign. Account-level negatives apply to every campaign in the account. For adjacent service exclusions — terms you never want to trigger any of your ads — always use account level. It’s a one-time setup that protects all current and future campaigns.

How do I know which adjacent services to exclude?

Pull your search terms report and sort by cost. Any search that describes a service you don’t offer but shares vocabulary with what you do is an adjacent service bleed. Add the service-specific descriptors as phrase-level negatives. Then think proactively about every category that overlaps with your vocabulary — don’t wait for spend data to tell you what you already know shares words.

Does the adjacent service rule apply to B2B home services companies?

Yes — and B2B home services often has more complex adjacent service landscapes. A commercial cleaning company has to exclude residential cleaning vocabulary, janitorial supply searches, and equipment purchase searches. A commercial epoxy flooring contractor has to exclude residential garage epoxy, craft resin, and installation training searches. The rule applies — the map is just larger.