Where commercial contracting leads actually come from: 6 public signals most contractors never check

Most contractors get leads one of two ways: referrals, or a marketplace that sells the same phone number to five companies at once. Both have a common blind spot — they only surface a job after the building owner has decided to start calling around.

But commercial work rarely appears out of nowhere. A failing rooftop unit, a re-paving project, a solar retrofit — these jobs leave a paper trail in public records weeks or months before anyone searches for a contractor. If you know where to look, you can be the first call instead of the fifth quote.

Here are the six public signal sources we watch, what a real signal looks like in each, and why almost nobody checks them.

1. Building permits

Most cities publish permit applications and issuances, often in a searchable portal or an open-data feed. Permits are a leading indicator: they tell you work is planned or underway — and every project drags related trades along with it.

What a signal looks like:

• A tenant-improvement permit on a 20,000 sq ft retail space almost always means HVAC rebalancing, new electrical circuits and plumbing rough-in — trades often not yet awarded when the permit is filed.
• An expired or stalled permit is its own signal: a project that ran out of steam, possibly because a sub fell through.
• A demolition permit next door to your target building type usually precedes new construction on the same parcel.

2. Code violations

Code enforcement databases are the closest thing to a list of buildings that are legally required to hire someone like you. A violation comes with a deadline, fines for non-compliance, and an owner who suddenly has a very concrete reason to return your call.

What a signal looks like:

• A notice citing “failure to maintain the roof in a weathertight condition” on a warehouse — an owner facing a re-inspection date.
• Electrical violations flagged during a fire-safety inspection at a multi-tenant commercial property.
• Repeat violations at the same address, which usually mean deferred maintenance across the whole building, not one isolated problem.

3. Bid and tender portals

Governments, school districts, transit agencies, churches and nonprofits are often required to publicly post work above a spending threshold. These are the highest-intent signals that exist: a written scope, a budget, and a deadline to respond. Yet most small and mid-size contractors never register on their region’s portals because the interfaces are painful and postings are scattered across dozens of sites.

What a signal looks like:

• An RFP from a school district for parking-lot resurfacing across three campuses, closing in three weeks.
• A municipal tender for HVAC replacement at a community centre, with the engineer’s spec attached.

4. Review mining

Public reviews are an underrated maintenance-problem database. Customers of hotels, restaurants, gyms and offices complain — in writing, with dates — about exactly the problems your trade fixes. The business owner reads those reviews too, and knows they cost bookings.

What a signal looks like:

• Multiple recent hotel reviews mentioning rooms that “wouldn’t cool down” — a property with a failing system and a public reputation problem.
• A restaurant review complaining about a leak over a dining area, or a gym review about cold showers.

The key is recency and repetition: one complaint is noise; three in two months is a budget line waiting to happen.

5. Storm tracking

Weather services publish storm reports with hail size, wind speed and the geographic swath affected. Cross-reference a hail swath with commercial building stock in that corridor and you have a list of properties that very likely have damage, insurance coverage for it, and a limited window to file a claim.

What a signal looks like:

• A verified report of golf-ball-size hail crossing an industrial park — flat roofs, rooftop HVAC units and skylights in the path.
• A wind event over a corridor of strip malls, where membrane and flashing damage often goes unnoticed until it leaks.

6. Capital-funding announcements

Money moving is the strongest predictor of work starting. Grant awards, approved municipal budgets, bond measures and facility-improvement programs are announced publicly — and each one names an organization that now has funds earmarked for building work.

What a signal looks like:

• A nonprofit announcing a facility-improvement grant that explicitly covers energy upgrades — solar, electrical and HVAC work that is funded before a contractor is chosen.
• A line item in an approved city budget for park pathway paving or municipal building re-roofing next fiscal year.

Why almost nobody checks these

None of this is secret. It’s just brutally fragmented. The six sources above live across hundreds of city portals, agency sites, weather feeds and review platforms, each with its own format and no alerts worth using. Checking them properly for one metro area is hours of work per week — for signals that are stale within days. Running a crew and doing this research are not compatible jobs.

How LeadRadar automates all six

This is exactly what we built LeadRadar to do. Our AI radar scans these public signal sources continuously for each trade and territory we cover. When it finds something, a human on our team verifies it — confirms the building, the evidence and the decision-maker contact — before it ever reaches a contractor. You get the signal, the quoted evidence it came from, a confidence score, and a suggested opening angle.

Don’t take the description on faith — we publish real archived leads so you can judge the quality yourself. Browse the sample leads and see what these six signals look like when they land in an inbox.