BuildZoom is known for its large, searchable national database of building permits and contractors, and for a marketplace that matches homeowners with contractors on larger projects. Its permit search is a popular free research tool.
Build Siren is not a database or a marketplace — it is a daily lead service. You pick your trade and Southeast Michigan territory; every weekday morning you get the new permits that match, scored and formatted for outreach.
| Build Siren | BuildZoom | |
|---|---|---|
| Core model | Daily permit lead reports | Permit / contractor database + project marketplace |
| Coverage | Southeast Michigan | National |
| Freshness | Next-morning delivery | Database updated over time |
| Best for | Local contractors wanting a daily pipeline | Research; homeowners seeking contractors |
| Pricing | From $99/mo | Free search; marketplace terms vary |
Choose Build Siren if you want a proactive daily list for your Metro Detroit service area. Choose BuildZoom if you want free permit research or marketplace project matches.
Request Build Siren access — from $99/month. Call (248) 290-8979. See permit leads by trade.