Chicago · building permits · month 2007-04
How many HVAC permits did Chicago issue in April 2007?
Every matching building permit the City issued from 2007-04-01 to 2007-04-30, counted in the City’s own dataset ydr8-5enu and re-read daily. Filter: Any permit whose work description mentions HVAC, a furnace, or air conditioning.
The City’s data portal did not answer.
This page counts dataset ydr8-5enu live, and the last read failed (City data portal did not answer, attempted 2026-08-09). We show nothing rather than a stale or invented total. The page retries within the hour, or you can query the City’s dataset directly.
[MISS]read ydr8-5enu · HVAC permits · month 2007-04
→ failed (City data portal did not answer) · attempted 2026-08-09
retry ▸ automatic, within the hour
April 2007 · week by week
Each week below holds every matching permit for its seven days, not just the largest. ISO weeks, so the first and last may reach a few days outside April 2007.
April 2007 · other trades
Permit Signal
A month is the scoreboard. Subscribers get their trade’s permits the morning each one becomes public — connected, with the contractor attached.