St. Louis County master plumber bonds.
$150 flat.
St. Louis County requires every Master Plumber to file a $25,000 indemnifying bond with the Office of Plumbing & Sewer Inspection. Ours is $150 flat, set by our carrier's rate book for this bond. The bond issues the moment you pay — no credit check.
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How much does a St. Louis County master plumber bond cost?
$150 at the $25,000 amount, the same for every applicant.
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 is the application. No credit check.
Pay & e-sign
Fixed-amount license bonds like this are among the bond types that issue right after purchase.
File with St. Louis County
Your executed bond and power of attorney arrive by email, ready to file with the Office of Plumbing & Sewer Inspection for your Master Plumber license. Wet-ink original mailed on request.
What it is and who needs it.
What the bond actually guarantees
St. Louis County licenses Master Plumbers through its Office of Plumbing & Sewer Inspection, and conditions the license on a $25,000 indemnifying bond. It's a compliance guarantee that you'll perform plumbing work in accordance with the County Plumbing Code and the conditions of your Master's license.
It's a three-party arrangement: you (the principal), the surety carrier, and St. Louis County (the obligee). If you violate the plumbing code or a permit condition and the County or a harmed party suffers a loss, they can recover against the bond up to $25,000.
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
Claims, renewal, filing, and what sets the price.
If a claim is made
A claim comes from the party the bond protects, the obligee named on the form, when the duty the bond guarantees is not met.
The surety investigates and pays a valid claim, up to the $25,000 bond amount. You then repay the surety: a surety bond is a guarantee of your performance, not insurance for you.
Renewal and term
The premium covers a one-year term from the effective date you choose; a longer term is the same price per year, chosen at checkout.
Renew before the expiry date to keep the bond in force: the license, permit or contract it backs expects continuous coverage.
How to file it
File with St. Louis County. Your executed bond and power of attorney arrive by email, ready to file with the Office of Plumbing & Sewer Inspection for your Master Plumber license. Wet-ink original mailed on request.
What sets the price
The premium is fixed at $150 at the $25,000 amount for every applicant: the carrier’s rate book prices this bond by the form, not by your credit or your business profile.
No credit check.
One application, issued instantly.
These are the actual issuing fields. No credit check.
Start the application →Common questions.
Other Missouri bonds.
Been told you need a different amount?
Price and requirements checked on the carrier’s application, . Page updated .
Finish your Master Plumber checklist today.
$150 flat, no credit check, bond often issued in the same sitting. Free until issued.