Guide
How to build a local business lead list by zip code or radius
By Andrew Ornelas ·
If you sell to local businesses, the best list is not the biggest one. It's the one that matches the area you can actually serve and the businesses that actually buy what you sell. Here's a simple way to build one, whether you do it yourself or have someone build it for you.
1. Choose how to draw your area
There are three common ways to define a territory:
- Radius. A circle around an address — your office, a store, a station's tower. Good when drive time matters, like service businesses and field sales. Most local sellers use 5 to 25 miles; rural markets may need 50.
- Zip code. Good when your territory is already assigned by zip, or when you want to test one neighborhood before going wider. Zip codes vary a lot in size, so check how many businesses one really holds.
- City. Simple and easy to explain to a sales team. Watch the edges: city limits often leave out busy suburbs right next door.
If you're not sure, start with a radius around one address and look at the count. You can always widen it.
2. Pick industries, not "everyone"
A list of every business in a zip code mixes dentists, gas stations and churches. Your message can't fit all of them. Choose two to five industries that already buy what you sell, and sort the list by industry so you can work one group at a time with one pitch.
It also helps to decide what to leave out. National chains usually buy through a head office, so local reps rarely reach the decision-maker. Many sellers also skip nonprofits and government offices.
3. Decide which columns you need
A useful local lead list usually has:
- business name and category
- a contact name and role when you can find one (owner, office manager, practice administrator)
- phone number
- email address
- street address, and distance from your center point if you used a radius
Extra columns are only worth it if you'll use them. A clean spreadsheet with six good columns beats a messy one with twenty.
4. Gather from public sources
Most local business details are public: business websites, online directories, chamber of commerce and trade association member lists, and local ad listings. The business's own website is usually the best source for a real email and the owner's name. Directory data alone tends to be out of date.
5. Clean and verify before you send
This is the step people skip, and it's the one that protects your email reputation. At minimum:
- remove duplicates and businesses outside your area;
- check that each email domain can receive mail (an MX check);
- drop generic no-reply and support inboxes;
- send a small first batch and watch the bounce rate.
Our guide on how to tell if a business email list is accurate explains bounce rates in plain English.
6. Follow the rules
In the U.S., B2B email is generally allowed under CAN-SPAM if you identify yourself, use honest subject lines, include a postal address and honor opt-outs. Calls and texts have stricter rules, especially for mobile numbers. If you're unsure, ask a lawyer.
Do it yourself or buy a list?
Building a few hundred leads by hand is very doable, but it takes time — often several hours per hundred businesses once you include finding contacts and checking emails. If your time is better spent selling, you can have a list built for you. Prospect Miner builds local lists by radius, zip code or city, with names, phones, checked emails and addresses, delivered as a spreadsheet. See pricing.
Want a list built for your area? Request a lead list — tell us the zip code, city or radius and the industries, and we'll reply with a quote.