Build Siren tracks the full range of building permits filed across Metro Detroit — new residential construction, additions, commercial build-outs, tenant improvements, demolitions and pole barns — and delivers the ones that match your scope every weekday morning, with the address, the described project, the estimated value where recorded, and the parties named on the filing.
Whether you are a GC looking for projects to bid or a specialty contractor who wants to reach the GC before the job is subbed out, the permit record is where it starts.
What is in a Build Siren GC lead report
- Exact address and municipality of every building permit
- Project type — new single-family, multi-family, addition, commercial new, commercial alteration / build-out, tenant improvement, demolition, accessory structure
- Estimated project value where recorded
- Named parties — owner, developer, or GC on the filing
- Lead score — Premium, Strong or Usable
- Formats — HTML dashboard, PDF, CSV
Building permit types we track
| Permit type | Why it matters |
|---|---|
| New single-family construction | Sub-bid opportunities; developer relationships |
| Additions & major alterations | GC-scale residential work |
| Commercial new construction | High value, long lead time to build a bid |
| Commercial alteration / tenant improvement | Steady build-out pipeline |
| Demolition permits | Early signal of a project before the build permit |
How GC leads are scored
- Premium — commercial new construction, multi-family, and high-value residential builds.
- Strong — additions, tenant improvements, and commercial alterations with a recorded value.
- Usable — small alterations, accessory structures, and already-contracted projects.
Demolition permits: the early warning
A demolition permit usually precedes a new-build permit by weeks or months. Build Siren flags demo permits so you can start the conversation with the owner or developer before the project is out for bid.
Cities we cover for general contractors
Build Siren covers building permits in Detroit, Warren, Sterling Heights, Ann Arbor, Novi, Troy, Macomb Township, Canton and the rest of our coverage area.
Why permit leads beat bid boards and shared leads
Bid boards show you projects everyone else is already bidding. Shared leads are resold homeowner forms. Permits show you projects at the moment they become real — often before they are widely known — with the address and the decision-maker’s name.
GC leads FAQ
I am a specialty sub, not a GC — is this useful?
Yes. New-construction and commercial permits name the GC. Filter to your project types and call the GC to bid your scope.
Can I get commercial-only permits?
Yes — filter to commercial new construction and tenant improvements.
How current is the data?
Each weekday morning, prior-day filings.
What does it cost?
One trade or category in Metro Detroit starts at $99/month; all trades $399. See pricing.
Other trades we cover
Roofing · HVAC · Plumbing · Electrical · Remodeling
Related reading
How Do Contractors Find New Construction Jobs? · Permit-to-Bid: Winning Jobs Before Your Competitors Call
Request access — plans from $99/month. Call (248) 290-8979.
General contractor leads by city
Detroit · Macomb Township — see all coverage areas.