Guide
How to Build a B2B Lead List from Google Maps
Updated September 25, 20268 min read
Most of what goes wrong with Google Maps lead lists happens before or after the scrape itself -- targeting too broadly, skipping verification, or sending to a list full of duplicates and dead numbers. Here's the process end to end.
Define who you actually want
Before touching a map, write down the actual criteria: business type, rough size (a single-location shop vs a multi-location chain behave very differently as prospects), and geography. "Plumbers in Texas" is not a target list -- "independent plumbing companies with 1-3 locations in the Dallas-Fort Worth metro" is one you can actually build a pitch around.
Pick your area deliberately
A city boundary, a radius around a specific point, or a hand-drawn region -- pick whichever matches how you actually think about your market. If you're testing a new market before committing, start with a smaller area (one metro, not a whole state) so you can evaluate response rates before scaling spend.
Scrape wider than your real target
Not every listing will have a phone number, working website, or matched email, and some won't be a real fit once you look closer. Scraping a broader pool than your actual campaign size gives you room to filter without running out of prospects.
Filter for fit, not just for having contact info
Review count, rating, and whether a website exists are all quick signals for how established a business is. A business with 200+ reviews and no website is a very different prospect than one with 5 reviews and a modern site -- decide which profile fits your offer before you send anything.
Clean and deduplicate the list
Overlapping searches (adjacent radiuses, similar keywords) will produce the same business more than once. Dedupe on name + address or phone number before anything else touches the list. Full guide here.
Verify emails before you send anything
Scraped and enriched emails are a best-effort match, not a guarantee -- run the list through a verification step to catch dead or mistyped addresses before a cold send, since a high bounce rate damages your sender reputation for every campaign after this one.
Load it into your outreach tool and segment
Once the CSV is clean, import it into Clay, Smartlead, your CRM, or wherever your sequences live, and segment by the fit signals from step 4 rather than sending one identical message to the whole list.
Where most lists actually fail
Almost never at the scraping step itself. It's skipping steps 5 and 6 -- sending a list with duplicates and unverified emails straight into a sequence -- that tanks deliverability and wastes the good prospects mixed in with the bad data. The scrape is the easy part; the fifteen minutes of cleanup afterward is what makes the list actually usable.
FAQ
How many leads should I scrape for one campaign?
More than you think you need, because a meaningful share won't have a usable email or phone number, and you'll likely filter out low-fit businesses by hand. For a campaign targeting a few hundred real prospects, scraping a few thousand raw listings before filtering is a reasonable starting point.
Do I need to verify emails before sending?
Yes, always. Any Google Maps scraper's email match rate (Maplist's is roughly 45%) comes from public sources like the business's own website, and some of those addresses will be outdated or mistyped. Running the list through an email verification step before a cold send protects your sender reputation.
Can I scrape the same area again later without getting duplicate leads?
Yes -- keep your exported lists and dedupe new scrapes against businesses you've already contacted before starting a new campaign in an overlapping area. See the dedupe guide linked below for the actual process.
Skip straight to step 3
Draw your area, pick your category, and get a clean CSV in minutes.
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