How fresh is Chicago permit data?

Daily refresh from Chicago Building Department + Cook County. New filings typically appear in PermitGrab within 24 hours.

Do you cover the suburbs?

Chicago city is the primary feed. Cook County suburbs are partially covered via the county permit aggregator and prod_cities expansion is ongoing — Naperville, Evanston, Skokie, and Oak Park are on the queue.

Can I filter to permits in specific ZIPs?

Yes. Filter by ZIP code or neighborhood (Lincoln Park, West Loop, Fulton Market, etc.) — the address-level data supports both.

Is the contractor phone data current?

Phone numbers are pulled from Illinois Department of Financial and Professional Regulation (IDFPR) license data and refreshed monthly. Staleness on the contractor side is rare; staleness on the homeowner side is mitigated by mailing-address-of-record from Cook County Assessor.

Does this work for radiant / hydronic specialists?

Yes — filter the permit description for "radiant", "hydronic", or "boiler" and you'll surface the smaller subset of mechanical permits where these specialty trades fit. Chicago has steady hydronic work in pre-war condo conversions on the North Side.

Chicago HVAC Contractor Leads from Building Permit Data

Published 2026-05-06 · 6 min read · Audience: HVAC contractors in Chicago

Chicago's mechanical permit volume is one of the highest in the country. The city files thousands of new HVAC and ventilation permits per year — driven by mid-rise multifamily, downtown office TI work, retail conversions, and a steady residential renovation market across the North Side and Lincoln Park. For HVAC contractors and mechanical subs, every one of those filings is a job in motion that you can bid before the GC shortlists.

PermitGrab pulls Chicago's permit feed daily and surfaces every mechanical-flagged filing — with the contractor of record, the project address, the scope, and the value tier. No aggregator, no shared leads, no cost per filing.

What Chicago HVAC permit data looks like in PermitGrab

3,498 active contractor profiles with phone numbers — searchable by trade, callable directly, no enrichment required for the named contractors of record
72,000+ Cook County property owner records — owner names + mailing addresses for direct mail to homeowners on bigger projects
Daily permit refresh, mechanical permit filtering, and downtown-vs-neighborhood geo split
Code violation data from the 22u3-xenr feed for cross-referencing properties already in active enforcement (those owners often pull replacement permits next)

Three highest-converting Chicago permit signals for HVAC

1. Mechanical permits on commercial TI projects

Chicago files hundreds of tenant improvement permits per month across the Loop, West Loop, Fulton Market, and River North. Most include a mechanical scope (replacement RTUs, new ductwork, dedicated outside-air units). The contractor of record on the master permit is your bid target — and PermitGrab's contractor-with-phone data turns the filing into a same-day call.

2. Multifamily new construction

Chicago's mid-rise multifamily pipeline (5-stories-and-up under the new zoning code) creates large MEP packages. The framing GC files the master permit; the mechanical sub is awarded weeks later. Tracking the master permit gives you a 4-6 week head start on outreach before the trade buyout.

3. Residential furnace + AC replacement

Chicago winters drive steady single-family mechanical work. Permits filed in late summer (Aug-Sep) are pre-heating-season replacements; filed in May-June, they're cooling-season jobs. PermitGrab's seasonal filter surfaces both windows.

How Chicago HVAC contractors actually use the feed

Set a daily filter on permit_type contains "mechanical" OR "HVAC" OR "ventilation" across Chicago + close-in suburbs.
Set a value floor at $50K for commercial work, $5K for residential.
Pull the contractor of record on master permits for new construction — the mechanical sub will be hired soon.
Cross-reference your CRM against permits filed at addresses you've previously bid — re-engage warm prospects with "saw you pulled a permit" outreach.
Match owner mailing addresses against your service-contract list — homeowners with new mechanical permits are renewal-ready.

Pricing

$149/month for unlimited Chicago access. Or start a 14-day trial and see this morning's mechanical permits in Chicago. Browse Chicago permits live.