St. Louis County mechanical bonds.
$300. Five minutes.
St. Louis County requires every licensed mechanical contractor to file a $10,000 indemnifying bond with the Department of Public Works. Ours is $300 flat — 3% of the bond amount — and the application is five minutes with no credit check.
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Three steps. One sitting.
County license bonds are about the simplest thing in surety. Here's the whole process:
Apply online
Business details and an effective date. That's the application — no financials and no credit check section on this bond.
Pay & e-sign
Fixed-amount license bonds like this are among the bond types that issue right after purchase. At most, 1–2 business days.
File with St. Louis County
Your executed bond and power of attorney arrive by email, ready to file with the Department of Public Works for your mechanical contractor license. Wet-ink original mailed on request.
The whole pricing page.
$10,000 bond × 3% = $300, one-time per term. Fixed amount, fixed price, multi-year if you want it.
What it is and who needs it.
What the bond actually guarantees
St. Louis County licenses mechanical contractors through its Department of Public Works, and conditions the license on a $10,000 indemnifying bond. It's a compliance guarantee that you'll perform mechanical work in accordance with the County Mechanical Code and the conditions of your license.
It's a three-party arrangement: you (the principal), the surety carrier, and St. Louis County (the obligee). If you violate the mechanical code or a permit condition and the County or a harmed party suffers a loss, they can recover against the bond up to $10,000.
It is not insurance for you — if the surety pays a claim, you repay the surety. The bond must stay active for the life of your license, so we track it and send renewal notices 60 and 30 days out to keep your filing continuous.
You need this bond if you're
Five minutes. The whole thing.
These are the actual issuing fields — no credit check section, because this bond doesn't have one.
Start the application →Common questions.
If yours isn't here, the bond team can usually answer within the hour.
How much is the St. Louis County mechanical contractor bond? +
Do I pay the $10,000? +
Who requires this bond? +
Is there a credit check? +
When does it renew? +
Other New York bonds.
Finish your county license checklist today.
$300 flat, five-minute application, bond often issued in the same sitting. Free until issued.