This guide shows how to build a list of contractors with phone, website and published email, segment it by trade and area, and contact it within the rules.
Contractor leads are contractor businesses that a supplier, software vendor, insurer, lender or agency can sell to, and a list of contractors is the directory that holds them. Build it from Google Maps and license boards with name, trade, phone, website and published email, then segment it by trade and area before you reach out.
The phrase has two opposite meanings, and this guide covers one of them. In the first, a contractor wants customers, so a "lead" is a homeowner or project request. In the second, you sell something to contractors, so each contractor business is the lead. Most pages that rank for the phrase are written for the first reader.
If you are the contractor looking for jobs, start with our guide to free leads for contractors or the trade guide on HVAC leads. If you sell materials, tools, software, insurance, financing or marketing to contractors, keep reading.
A list of contractors is the raw directory: company, trade, address, phone, website and, when published, an email. A contractor lead is an entry from that list that you have checked against your offer, for example a roofing company in your delivery area with a working website and good reviews. The list is the starting point; qualifying turns it into leads.
It also helps to know who you are targeting. A general contractor is the construction manager who oversees the site and manages vendors and trades. Subcontractors are the specialist trades such as electrical, plumbing, masonry, carpentry and roofing. General contractors buy materials, bonding and project software. Subcontractors buy tools, vehicles, equipment financing and marketing.
The Census Bureau's County Business Patterns counts 814,557 construction establishments with paid employees in the US for 2023, and 536,259 of them have fewer than five employees, according to the 2023 national file. In a business that small, the owner is the buyer, so the number you dial is usually the decision maker's.
County Business Patterns covers establishments with paid employees, so sole proprietors with no staff are not in these figures. The real pool of contractor businesses is larger, and many of them are visible only on Google Maps. Here is how the biggest trades break down in the same 2023 file:
| Trade (NAICS) | US establishments, 2023 | What it means for your list |
|---|---|---|
| Residential remodelers (236118) | 135,337 | Largest single group, many owner-run crews |
| Plumbing, heating and air-conditioning (238220) | 111,207 | Service-driven, recurring work, fleet and software buyers |
| Electrical contractors (238210) | 83,342 | Licensed trade, steady demand for tools and training |
| Roofing (238160) | 25,519 | Seasonal, storm-driven, strong on lead and CRM tools |
| Poured concrete (238110) | 23,350 | Equipment, materials and financing buyers |
| Drywall and insulation (238310) | 20,760 | Supplies and labor-heavy, thin margins |
| All construction (23) | 814,557 | Never target it as one block: segment by trade |
You can build a list of contractors from license boards, Google Maps, business websites or a purchased file. Each one answers a different question, and the strongest lists use more than one.
| Source | What you get | Main limit | Best use |
|---|---|---|---|
| State license boards | Official license record, searchable by business or personnel name | One state at a time, formats differ, little marketing data | Checking that a firm is licensed |
| Google Maps | Name, address, phone, website, rating and review count of businesses live today | No emails, and the category is chosen by each business | Building the list at scale by trade and city |
| Business websites | Published emails, extra phones and social links | Only what each site chooses to publish | Reaching the owner |
| Purchased email lists | A ready-made file with emails | Can be sold to several buyers, age of each record unknown | Quick tests, after verifying every address |
License boards are the authority on status. California's Contractors State License Board, for example, runs a public license lookup where you can search by license number, business name or personnel name and see complaint disclosure. Each state has its own board and format, which makes them slow for list building but ideal to double-check a firm you are about to pitch.
Google Maps is where the volume is: contractors keep their phone, website and reviews current there to win jobs, so a generated list beats a file that was assembled months ago.
Run one trade and one area at a time, collect the results, add the emails the websites publish, then clean and segment. The process takes six steps:
To see the extraction before you try it, watch the tutorial in video on the product page.
Match the trade to the product, then filter by area and by signals on the record. The same list produces five different campaigns:
| What you sell | Trades to target | Segment by |
|---|---|---|
| Building materials and supplies | General, masonry, roofing, drywall | Trade plus delivery radius |
| Field service software and CRM | HVAC, electrical, plumbing, remodeling | Trade plus review count, a proxy for job volume |
| Insurance and bonding | General contractors and specialty trades | Trade plus license status and region |
| Financing and equipment leasing | Excavation, concrete, landscaping | Trade plus area |
| Websites, SEO and ads for contractors | Roofing, plumbing, remodeling | No website, low rating or few reviews |
Freelancers and small agencies have an extra advantage: the record itself shows the problem. A roofer with no website, a plumber with a low rating or an electrician with few reviews is a ready-made reason to start a conversation.
Open with one fact from their own record and ask one question. Contractors read messages on the phone between jobs, so two or three sentences beat a long pitch.
Reach the person who decides. In a firm with a handful of employees that is the owner, and our guide on how to find business owners shows how to get from a listing to a name. A reference to their reviews or their service area shows the message was written for them, not sent to a thousand others.
Rebuild the list for each campaign instead of reusing last quarter's file. Phones change, firms close and websites move, and an old list raises your bounce rate.
Yes, if you follow the rules of your market. In the US, the CAN-SPAM Act, codified in 15 U.S.C. 7704, sets four requirements for commercial email, and it contains no carve-out for business recipients:
Phone, SMS and other countries follow different rules, and state law can add more. Read our overview on whether it is legal to scrape Google Maps, and ask a lawyer before a large campaign. Use the contractor's published business mailbox, not a personal address.
Search Google Maps and press Start. Vonsel gathers the business results as you explore the map, going beyond the pins you can see at a glance. Pause, continue and save your search when you are ready. Google Maps does not provide business emails, so Vonsel visits the available business websites to find published emails, additional phone numbers and links to up to 118 supported social networks and other platforms. What it finds depends on what each website publishes.
Then keep the businesses on a map, organise them by stage, edit their details and work them on a Kanban board, calendar, notes, actions, tags and custom fields. Free holds 20 businesses unlocked, and the other plans hold more. See the pricing page for what each one includes.
In short:
