A niche Maps search is easy. The messy part is leaving with a file an outreach person can open on Monday.
I treat it as a short pipeline, not a scrape-everything job.
Start with one service and one place. "Roofers in Tucson" is usable. "Home services in the Southwest" is not. A tight query keeps the later CSV honest.
From that open Google Maps results page, a browser extension can walk the visible listings and keep going through later pages. The columns I actually keep are business name, email (including an address detected from the public site when Maps does not print one), phone, website, street address, category, rating, review count, Place ID, CID, latitude and longitude, and the public social profiles that show up: Instagram, Facebook, X, LinkedIn, Yelp, and YouTube. Duplicate rows get dropped before anything is downloaded.
Export is CSV, XLSX, or JSON. I open the file, spot-check ten rows, and only then hand it to whoever writes the first email.
Google Maps Email Extractor is the Chrome and Edge extension I use for that middle step. The free trial covers 200 leads. Paid plans are listed on the pricing page.
Two rules keep this from becoming spam. Contact only businesses whose details came from a public listing, and honor opt-outs. A Maps-derived email is a lead to verify, not proof someone reads that inbox. A short note about the service they already list beats a generic blast.
For a small agency building a first pass on a client niche, that is enough: one search, one clean file, no screenshot folder.
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