Construction Leads From Permit Data: A Practical Guide for Contractors and Suppliers

The problem with most construction leads

Lead services sell names. Some are real, many are stale, and almost none come with proof that a project exists. Contractors pay for clicks or shared leads and then compete on price with four other firms who bought the same contact.

Building permits are different. A permit is filed with a public authority, it has an address, a date and a description, and it exists because someone has decided to build. That makes permit data the most honest construction lead source there is. The challenge has always been collecting it.

What Mapenzo collects

Mapenzo gathers official permit data into one map: about 1.7 million permits across Estonia, Finland, Latvia, Lithuania, Poland, France, Ireland, the Netherlands and the United Kingdom, and permit-level data from areas in 14 US states. Two additional layers show over 33,000 energy projects and 4,323 existing data centres (plus 281 confirmed planned data centre projects).

In the US, 2026 counts by trade across all covered areas are:

(A permit can belong to more than one trade.)

Four ways to turn a permit into a lead

1. Follow-on trades. Every permit creates work for others. A new pool needs a fence, a reroof is the best moment for solar, a new house needs everything from windows to landscaping. Filter the map for the trade that comes before yours.

2. Contractor relationships. Many cities publish the contractor. If one builder appears on fifty permits, that builder buys materials and hires subcontractors every week. Suppliers should call them, not the homeowner.

3. Neighbourhood campaigns. Permits cluster. When ten roofs on one street get permits after a storm, the other houses are likely next. Leaflets, door-knocking and local ads in that area convert far better than city-wide spending.

4. Early-stage projects. Applications come before issued permits. In Europe in particular, Mapenzo shows applications and issued permits separately, so suppliers and designers can reach a project months before work starts.

A weekly routine that works

1. On Monday, open the map for your service area.
2. Filter to your trade (or the trade before yours) and the last seven days.
3. Separate applications from issued permits.
4. Note addresses, values and contractors worth contacting.
5. Contact the general contractor for large jobs, the owner for small residential jobs where local rules allow.
6. Keep a simple list of which permits became quotes and which became jobs.

After a month you will know your real conversion rate from permit to job, which is the number that tells you whether to expand to more areas.

Where the numbers are strongest

Large US datasets include New York City (113,927 permits in New York state areas), Los Angeles and San Francisco (72,369 in California areas), Philadelphia (36,521), Austin and Collin County (30,129), and Chicago (25,278). In Europe every covered country is available nationwide, from Tallinn to Paris.

Limits

Not every city publishes contractor or value, and some classify work types broadly. Mapenzo shows exactly what the source publishes and links to it, so you can check before calling.

Try it

Mapenzo has a simple way to test this: a 12-hour pass for 5 € opens every country, every permit and every layer, including energy projects and data centres. If you then subscribe, your first month is 50% off. Personal plans are 20, 50 or 80 € per month, and Team plans for sales teams are 40, 100 or 150 € per month.

FAQ

Are permit-based leads legal to use?

Yes, permits are public records published by authorities. Respect local rules on direct marketing, especially GDPR in Europe when contacting private individuals.

Are permit leads better than bought lead lists?

They are earlier and more specific: every permit is a real project with a date and address.

Which trades get the most leads?

In our 2026 US data interior and remodel permits are the largest group (64,400), followed by plumbing (52,815), roofing (45,542) and HVAC (45,484).

How much does it cost?

A 12-hour pass costs 5 €; subscriptions start at 20 € per month with 50% off the first month.

Frequently asked questions

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