Contractor Licensing Information

Community Development has developed a number of guides to assist applicants in moving smoothly through the review process.

Electrician Information
We honor the county's testing, but you must have a separate compliance bond in the amount of $10,000 for the City of St. Charles (the bond must state "City of Saint Charles" and have an ending date of June 30 or continuous).

Questions regarding the above may be directed to the Department of Community Development at 636-949-3227.

Drainlayer's Information
If drainlayer has a license issued by State of Missouri Health and Senior Services, that is acceptable.

We also have 3 tests that the drainlayer can take. It will cost $50 to take each test. This test will only allow the drainlayer to work in the city limits of St. Charles.

A $10,000 compliance bond made out to the City of St. Charles. Bonds for 1 year or more must expire on June 30 unless you have a continuous bond. If your bond is continuous, it should show the beginning date and have the word continuous included. You must submit the original bond to our department - no bond copies.

A check for $20 for a drainlayer's license. The license is renewable each year. The license is good from July 1 to June 30 of the following year.

Please Note: If the drainlayer is getting his license after December 31 the license fee is $10.

A paid personal property tax receipt or tax waiver in the company name. Companies whose offices reside in St. Charles County are required to submit a copy of their paid personal property taxes or obtain a waiver from the St. Charles County Assessor, 636-949-7425.

If your business is run from your home and you reside in the City of St. Charles, you will need to apply for a Home Occupation License.

Questions regarding the above may be directed to the Department of Community Development at 636-949-3227. You can print the Drainlayer's License Application (PDF).

Plumbers
The City of St. Charles accepts testing by International Code Council. To apply for this testing please contact the International Code Council. The plumber may take a 20 question essay test administered by the City of St. Charles. The cost of the test is $50 (Ordinance #87-106). Please contact Community Development at 636-949-3227 for this testing. Please Note: The City of St. Charles testing is not recognized by any other municipality.

The City of St. Charles does accept test results from Experior Assessments (known as the block test.) Experior is no longer in business, however, if you have taken the block test in the past, this would be acceptable. The city does not recognize test results from the Aptitude Sertification Unlimited.

When you have passed your plumbers test, you will need to submit the following to be licensed in the City of St. Charles:
  • A $10,000 compliance bond. Please Note: Bonds for 1 year or more must expire on June 30 unless you have a continuous bond. If your bond is continuous, it must be stated on the bond. You must submit the original bond to our department. The bond should be made out to the City of St. Charles.
  • A Check for $35 for the plumber license fee. This license is renewable each year. The license is good from July 1 to June 30 of the following year.
  • Please Note: If the plumber is getting the plumber's license after December 31, the license fee is half price at $17.50.
  • A paid personal property tax receipt or tax waiver in the company name. Companies whose offices reside in St. Charles County are required to submit a copy of their paid personal property taxes or obtain a waiver from the St. Charles County Assessor, 636-949-7425.
  • A completed license application.
If your business is run from your home and you reside in the City of St. Charles, you will need to apply for a Home Occupation license.

Questions regarding the above may be directed to the Department of Community Development at 636-949-3227. You can print the Plumber's License Application (PDF).

Heating Ventilation & Air Conditioner (HVAC) Information

Building Regulation 500.150 governs the licensing of persons who design, install, construct, maintain, service, repair, alter or modify a product or equipment in heating, air conditioning, refrigeration, ventilation, process cooling and process heating.

Any person engaging in HVAC work must first obtain the appropriate (Class A or B) license issued by St. Charles County or have passed tests equivalent to those required for HVAC license by St. Charles County for the work to be performed. St. Charles County Building Department phone number is 636-949-7345.

Any person engaging in HVAC work must annually purchase a Tinner's License from the City of St. Charles, the cost of which is $50, before such HVAC work is done.

A paid personal property tax receipt or tax waiver. Companies whose offices reside in St. Charles County are required to submit a copy of their paid personal property taxes.

Any person licensed under the provisions of this ordinance is required to maintain on file with the Director of Community Development evidence of an individual or blanket bond in the amount of $10,000, made out to the City of Saint Charles, to be kept in force at all times, and liability insurance coverage in the amount of $500,000. Please Note: Bond and insurance should be effective from July 1 to June 30.

Any person engaging in HVAC work obtain the necessary inspections and approvals for such work in a timely fashion.

Questions regarding implementation and enforcement of this regulation may be directed to the Department of Community Development at 636-949-3227. You can print the HVAC/Tinner's License Application (PDF).