How Solar Installers Use Building Permit Data to Find Warm Leads
If you're a solar installer still buying leads from aggregators at $30-50 each, you're overpaying for prospects who've already been called by three other companies. There's a better way: building permit data gives you a direct line to homeowners who are actively investing in their property right now — and haven't been contacted by anyone yet.
Why Building Permits Are the Best Signal for Solar Sales
A building permit means a homeowner just committed real money to improving their property. That's fundamentally different from someone who filled out a web form or clicked an ad. Permit holders are in "investment mode" — they've already decided to spend on their home, they're working with contractors, and they're thinking about long-term value.
Three permit types are especially valuable for solar installers:
Roof replacement permits are the gold standard. A homeowner replacing their roof in the next 30-60 days is the perfect solar prospect — install solar panels at the same time, share the scaffolding cost, and avoid a second disruption. The conversion rate on roof-replacement leads is dramatically higher than cold outreach.
Electrical panel upgrade permits signal a homeowner modernizing their electrical system, often a prerequisite for solar installation. If they're already upgrading to 200-amp service, the incremental cost of solar-ready wiring is minimal.
New construction permits represent homeowners building from scratch. Solar is cheapest during new construction — no retrofit costs, clean roof, optimal panel orientation. These leads convert at the highest rate if you reach them during the design phase.
The Numbers: What Permit Data Actually Looks Like
This isn't theoretical. PermitGrab tracks permit filings across 11+ major US cities in real-time. Here's what the data looks like right now:
New York City filed 27,916 building permits in the last 90 days — that's 310 new leads per day. Chicago filed 5,684 (63 per day). Phoenix filed 6,039 (67 per day). Miami-Dade County processed 5,421 permits in the same period.
Chicago's top trade category is Electrical, with 2,774 active contractors pulling permits. Many of those electrical permits involve panel upgrades — exactly the kind of work that pairs with solar installation. Miami-Dade has 692 active roofing companies, and San Antonio has 1,202 landscaping and exterior contractors working on properties right now.
Each of these permits comes with the property address, permit type, filing date, and often the contractor and property owner information. That's everything you need to make a targeted, well-timed outreach.
How to Filter Permits for Solar Prospects
Not every permit is a solar lead. Here's how to filter effectively:
By permit type: Focus on residential new construction, roof replacement, electrical upgrades, and major renovations. Skip commercial permits, demolitions, and minor plumbing/mechanical work unless you also do commercial solar.
By geography: Solar economics vary dramatically by location. Sun-belt cities like Phoenix, San Antonio, and Miami-Dade have the best solar ROI. But even in Chicago and NYC, state incentives and high electricity costs make solar viable.
By timing: The best time to reach a homeowner is within 1-2 weeks of permit filing, before construction starts. For new construction, even earlier — during the plan review phase if possible.
Permit Data vs. Traditional Solar Lead Gen
Traditional solar lead sources charge $15-50 per lead, and you're competing with 3-5 other installers who bought the same lead. The homeowner is already fatigued by the time you call.
Permit data is different: you're the only one reaching out based on their specific permit activity. The homeowner hasn't requested quotes — you're proactively offering value at exactly the right moment. And at $149/month for unlimited access to all cities and all permit types, the cost per lead drops to pennies.
Getting Started
PermitGrab delivers daily permit filings with property addresses, permit types, contractor details, and (where available) property owner information from county assessor records. Data is sourced from official city open data portals — the same records available at city hall, delivered to your inbox.
Start your free trial and see today's permits in your target cities. No per-lead fees, no contracts, cancel anytime.
See also: Solar & Home Service Leads from Building Permits
City spotlights
Want city-specific solar lead playbooks? Read these next:
- Phoenix solar installer leads from building permits — the most solar-friendly major metro in the US, 79K+ Maricopa property owners, 1,080+ contractors with phones
- NYC roofing leads from DOB permits — 12K+ active permits across 5 boroughs, refreshed daily