Does Missouri require contractors to be licensed?

Missouri does not require a statewide general contractor license — anyone can legally call themselves a general contractor in Missouri without any state-issued credential. Individual trades (electrical, plumbing, HVAC) require state licenses. Many Missouri municipalities (Kansas City, St. Louis city and county) have local licensing requirements. Always verify local licensing requirements with your city or county building department.

How do I verify a contractor's license in Missouri?

For trade contractors (electricians, plumbers, HVAC), verify their license at the Missouri Division of Professional Registration website. For general contractors, check local licensing with your municipality — Kansas City requires a general contractor registration, and St. Louis city and county have their own requirements. Also verify that any permit-required work will be pulled by the contractor, not asked of you.

How much should a contractor ask for as a deposit in Missouri?

A standard deposit in Missouri is 10–25% of the total project cost. Never pay more than 30% upfront for any project. Deposits above 33% are a red flag — legitimate contractors with established businesses and supplier accounts don't need to pre-fund material purchases with your money. Payment milestones tied to project completion stages are the professional standard.

What should a contractor contract include in Missouri?

A valid Missouri contractor contract must include: project scope in specific detail (materials by brand and grade, not just descriptions), start and completion dates, payment schedule with milestones, a change order process requiring written approval before additional work begins, warranty terms, and contractor's license number and insurance policy information. Verbal agreements are not enforceable for work over $500 in most Missouri jurisdictions.

What is a mechanics lien in Missouri and how do I protect myself?

A mechanics lien in Missouri allows contractors, subcontractors, and suppliers who haven't been paid to place a lien on your property — even if you paid your general contractor in full. Missouri law gives subcontractors and suppliers the right to file liens directly against homeowners. Protect yourself by requiring lien waivers from the GC and all subcontractors at each payment milestone, and consider a joint check arrangement for large material purchases.

How to Hire a Contractor in Missouri: 7 Things to Check Before You Sign

The Missouri Contractor Problem

Missouri is one of several states that does not require a statewide general contractor license. Any person with a pickup truck and a business card can legally call themselves a general contractor in Missouri and sign contracts for home improvement work. This doesn't mean all Missouri contractors are unqualified — it means you can't rely on licensure as a baseline quality filter the way you can in other states.

This makes your pre-hire verification process more important, not less. Here are the seven things to check before signing anything.

1. Verify Local Licensing

Even without a state requirement, most Missouri cities and counties have local registration requirements. In Kansas City, general contractors must register with the city. St. Louis city and county have their own requirements. Check with your local building department: "Does this contractor need to be registered or licensed to do this type of work in this jurisdiction?"

For trade contractors — electricians, plumbers, HVAC technicians — verify state licensure at the Missouri Division of Professional Registration (pr.mo.gov). These licenses are required statewide and easy to look up in 30 seconds.

2. Confirm Insurance by Calling the Carrier

Request a Certificate of Insurance showing General Liability (minimum $1 million per occurrence) and Workers' Compensation. Then call the insurance company at a number you look up independently — not one the contractor writes down for you. Ask: "Is this policy current? What are the limits? Has it lapsed in the last 12 months?"

Certificates can be falsified. Policies can be cancelled for non-payment the day after the certificate is printed. A 3-minute phone call catches both.

3. Require an Itemized Bid (Not an Estimate)

An estimate is a number designed to win your interest. A bid is a legal document listing:

Every material by brand, model, grade, and quantity
Labor rates or lump-sum labor by trade
Permit costs
Start and completion dates
Payment schedule with milestone triggers

If a contractor gives you a number on a napkin or a vague email, you don't have a bid. Ask for a line-item document. A contractor who won't provide one cannot be held accountable for what they install.

4. Get Three Bids from Three Different Contractors

This is not about finding the lowest price. It's about understanding the market rate and identifying scope gaps. When three contractors bid the same project, you can see:

Which one missed scope items (they'll come back with change orders)
Which one is using inferior materials to hit a lower number
What the legitimate range is for your project in your market

Bids that are 30%+ lower than the others are rarely a bargain.

5. Check References from the Last 12 Months

Don't rely on testimonials on a contractor's website. Ask for three references from projects completed in the past year in a similar scope to yours. Call each one and ask:

Did they finish on time?
Did the final cost match the bid?
How did they handle problems when they came up (and they always come up)?
Would you hire them again?

The answer to that last question tells you everything.

6. Understand the Deposit and Payment Schedule

Standard Missouri contractor payment structure:

Deposit: 10–25% at contract signing
Progress payments: Tied to specific completion milestones (framing complete, rough-in complete, finish work complete)
Final payment: Held until punch list is resolved and work is complete

Red flags: Any request for more than 30% upfront. "I need the money to order materials" is a warning sign — established contractors have supplier accounts and credit lines. Paying for materials you haven't received gives you no leverage if the contractor doesn't show up.

7. Get Lien Waivers at Every Payment

Missouri's mechanics lien law allows subcontractors and material suppliers to lien your property if the general contractor doesn't pay them — even after you've paid the GC in full. This is not a rare edge case. It's how "pay your contractor and still lose your house" situations happen.

Require a signed lien waiver from your GC and any subcontractors at each payment milestone. For large material purchases, consider a joint check arrangement — the check is made payable to both the GC and the supplier, so it can only be cashed if the supplier endorses it, confirming they received payment.

The Fastest Verification Shortcut

If the above process sounds like a lot of work, AboveBoardPros does most of it for you. Contractors in our network have passed license verification, insurance confirmation, reference checks, and business history review before you see their name. You still get three bids and still read the contract carefully — but you start with a filtered pool instead of a blank search.