St. Louis County mechanical bonds.
$100 flat.

St. Louis County requires every licensed mechanical contractor to file a $10,000 indemnifying bond with the Department of Public Works. Ours is $100 flat, set by our carrier's rate book for this bond. The bond issues the moment you pay — no credit review of any kind, not even a soft pull.

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Required for your St. Louis County mechanical contractor license — new applicants and renewals through Public Works

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Fixed amount, fixed price — $10,000 bond, $100, no quote process

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Multi-year terms available — set it once for up to 3 years

A-ratedA.M. Best carriersInstantunderwriting process1–3 yrterms available

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How it works

Three steps. One sitting.

County license bonds are about the simplest thing in surety. Here's the whole process:

NOW · ONLINE

Apply online

Business details and an effective date. That's the application — no financials and no credit information collected on this bond.

MINUTES, USUALLY

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.

SAME DAY

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.

About this bond

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.

Mechanical Code of St. Louis County (Chapter 1108 SLCRO)The Mechanical Code of St. Louis County, Missouri (Chapter 1108 SLCRO, 1974, as amended) conditions a mechanical contractor license on an indemnifying bond filed with the County. The Department of Public Works sets the bond form and the $10,000 amount; confirm the current amount and form language on your license application.

You need this bond if you're

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Applying for a St. Louis County mechanical contractor license — the bond is filed with your application

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Renewing your county license and your bond is expiring or your surety non-renewed

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A new mechanical company taking work in unincorporated St. Louis County

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An out-of-area contractor adding St. Louis County to your service map

One application, issued instantly.

These are the actual issuing fields — the application collects no credit information, because this bond doesn't need it.

Start the application →

FAQ

Common questions.

How much is the St. Louis County mechanical contractor bond?The premium is $100 — set by our carrier's rate book for this fixed $10,000 bond, the same for every contractor. The County set the $10,000, so there is no quote process.

Do I pay the $10,000?No. You pay $100. The $10,000 is the surety's maximum liability to St. Louis County if a valid claim is made — not a deposit, and nobody holds your money.

Who requires this bond?St. Louis County's Department of Public Works requires it as a condition of a mechanical contractor license, under the County Mechanical Code (Chapter 1108 SLCRO). No active bond, no license.

Is there a credit check?The application collects no credit information — there's no credit section at all. Most applications for small fixed-amount county license bonds like this one approve instantly; if a check ever runs, it's a soft pull that won't affect your score.

When does it renew?The bond must stay active for as long as you hold the license. You can buy a 1, 2, or 3-year term; we send renewal notices 60 and 30 days out, with autopay available, so your county license never lapses over a missed email.

Related bonds

Other Missouri bonds.

Finish your county license checklist today.

$100 flat, no credit review, bond often issued in the same sitting. Free until issued.

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Your price$100

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