Mechanical permits = a homeowner replacing or upgrading HVAC equipment. They've already chosen a contractor (or are about to). Get the lead before the install — for warranty, upgrades, maintenance contracts, or as a competing quote.
Door-knocking is 1-3% conversion. HVAC permits are pre-qualified by the homeowner's own action — they pulled the permit because they're replacing equipment. Call within 7 days of permit pull for 8-15% close rate on upsells (extended warranty, smart thermostat, dual-fuel addition).
New residential construction permits typically include mechanical sub-permits. Filter by permit_type = "mechanical" + new_construction = true to find builder-grade systems homeowners commonly upgrade within 12 months.
200A electrical service upgrade is the #1 leading indicator of an upcoming heat pump install. Average lag from service-upgrade permit to mechanical-replacement permit is 47 days. Send a heat-pump quote immediately and you're in front of every competitor.
Deep-dives covering price, channel mix, and aggregator alternatives: <a href="/blog/how-much-do-hvac-leads-cost-2026">How much do HVAC leads cost in 2026</a> (Angi $20-80 vs Networx $60-150 vs PermitGrab $149/mo). <a href="/blog/hvac-lead-sources-compared-2026">Every HVAC lead source compared in 2026</a> (the full landscape — Angi, HomeAdvisor, Networx, CraftJack, LSAs, Facebook, door-knocking, permits). <a href="/alternatives/networx">Networx alternative</a> and <a href="/alternatives/craftjack">CraftJack alternative</a> cover the specific competitor switches.
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