HVAC
- Mail route: past a 14-year service life
- 225,167
- Systems with a known install date
- 25,936
- Houses open right now
- 406
Detroit, MI · Wayne County
Your next Detroit install is already on this list.
We read Detroit's public building permits and 226,518 Wayne County parcel records every night and turn them into a working list for local contractors — the homes you can quote before the system picks the date. Here's exactly what you'd be getting, as of August 23, 2026.
450,413homes due for a new HVAC or plumbing system — your mail route
44,501HVAC permits read, back to 2019
32,184plumbing permits read
85,310absentee-owned properties
What you'd be working in Detroit
Plumbing
- Mail route: past a 12-year service life
- 225,246
- Systems with a known install date
- 25,901
- Houses open right now
- 230
Roofing
- Watch list: past an 18-year roof life
- 224,854
- Roofs with a known install date
- 119
- Roofing permits open right now
- 8
Straight answer
Permit history in this feed doesn't yet reach back far enough to date individual systems, so replacements here are the aging tier rather than permit-confirmed. We're loading deeper archives metro by metro.
The routes worth a truck in Detroit
Homes past service life by ZIP. Run the density, not the whole county.
| ZIP | Aging HVAC | Aging plumbing |
|---|---|---|
| 48228 | 19,062 | 19,064 |
| 48235 | 17,609 | 17,610 |
| 48219 | 17,169 | 17,172 |
| 48227 | 16,793 | 16,794 |
| 48224 | 15,371 | 15,387 |
Every ZIP in Wayne County is in the data, 58 of them with counts. Check yours below.
Check the ZIP you run
Live counts for any Detroit ZIP, no signup. Try 48228.
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