Michigan’s climate means furnaces and A/C systems get replaced constantly — and most municipalities require a mechanical permit to do it. Build Siren tracks those mechanical permits across Metro Detroit and sends you the ones that match your trade every weekday morning, with the property address, the equipment described on the filing, and the estimated value where it is recorded.
What is in a Build Siren HVAC lead report
- Exact address of every mechanical permit — residential and commercial
- Equipment / scope — furnace changeout, A/C or heat-pump install, full system replacement, rooftop unit, boiler, ductwork, mini-split
- Estimated project value where recorded
- Named contractor or homeowner
- Lead score — Premium, Strong or Usable
- Formats — HTML dashboard, PDF, CSV
HVAC permit types we track
| Permit type | Why it matters |
|---|---|
| Furnace / A/C changeout | High-volume residential replacement work |
| Full system replacement | Higher ticket, homeowner actively deciding |
| Rooftop unit (RTU) — commercial | Fewer bidders, strong margins |
| Boiler replacement | Older Metro Detroit housing and multifamily |
| New-construction mechanical | GC may still need a mechanical sub |
How HVAC leads are scored
- Premium — commercial RTU replacements, multi-unit mechanical work, or high-value full-system permits.
- Strong — residential full-system replacement, or a homeowner-pulled mechanical permit with no contractor named.
- Usable — single-component changeouts and permits where a competitor is already named.
Cities we cover for HVAC contractors
Build Siren covers mechanical permits in Warren, Sterling Heights, Novi, Farmington Hills, Southfield, Royal Oak, Troy, West Bloomfield and the rest of our coverage area.
Why permit leads beat shared HVAC leads
A shared “furnace replacement” lead is a form fill sold to several companies at once, often before the homeowner is committed. A mechanical permit means the job is real and permitted. New-construction mechanical permits are especially valuable — the GC is on the filing, and you can call to bid the HVAC scope directly.
HVAC leads FAQ
Can I filter to commercial only?
Yes — filter to commercial mechanical permits and RTU work.
Do you catch new-construction HVAC?
Yes. New residential and commercial builds pull mechanical permits; the GC named on the permit is your contact to bid the work.
How current is the data?
Reports go out each weekday morning with the prior day’s filings.
What does it cost?
HVAC as a single trade in Metro Detroit starts at $99/month. See pricing.
Other trades we cover
Roofing · Plumbing · Electrical · Remodeling · General Contractor
Related reading
How Do Contractors Find New Construction Jobs? · How to Get Construction Leads from Building Permits
Request access — plans from $99/month. Call (248) 290-8979.
HVAC leads by city
Detroit · Warren · Sterling Heights · Troy · Novi · Livonia — see all coverage areas.