Missouri issues no statewide HVAC license
Missouri has no statewide HVAC, mechanical or general contractor license. The Division of Professional Registration sits inside the Missouri Department of Commerce and Insurance and staffs the state boards that do exist. Those boards cover accountancy, architecture and engineering, dentistry, nursing, pharmacy, real estate, veterinary medicine and similar fields under Chapter 324 of the Revised Statutes of Missouri. Nothing in that chapter creates a board for heating, ventilation, air conditioning or refrigeration contracting. The license that lets you set a rooftop unit in Springfield is issued by Springfield. The one that lets you do the same job in Columbia is issued by Columbia. For a contractor selling work rather than studying for a first exam, that single fact reshapes the week. You are not quoting one license number on every estimate. You are tracking a stack of them, one per city or county you serve, each with its own exam, its own renewal month and its own bond form. A crew that crosses a county line on Wednesday can cross a licensing line at the same time. Homeowners almost never know this. They ask whether you are licensed in Missouri, and the honest answer is that you are licensed by the jurisdictions where you pull permits. Before you bid a new town, call that city or county building office and ask three things: which mechanical license class the job needs, whether they accept an exam score you already passed somewhere else, and how many weeks approval takes. Then put that lead time into the quote instead of discovering it after the customer signs.
Sourcesrevisor.mo.gov 1revisor.mo.gov 2dci.mo.gov 3
Kansas City: business license first, trade license second
Kansas City runs two separate requirements and contractors regularly confuse them. The first is the city business license. Kansas City BizCare states that business licenses are required by Section 40 of the Kansas City municipal code of any operation that generates revenue, transacts or employs within city limits. That wording catches an HVAC company headquartered in Lee's Summit that only drives into Kansas City for service calls. The second requirement is contractor licensing, which BizCare describes as required of certain construction trades and administered by the Permits Division. That division sits on the fifth floor of City Hall, takes walk in customers, and can be reached at 816-513-1500. Before the city will issue the business license, a construction company has to hand over proof of workers compensation insurance or a filed exemption. BizCare names the documents by number: a workers compensation certificate of insurance, Form MO-WC76, the certificate of insurer, and Form MO-WC65B for an exemption. New businesses also need a Missouri Secretary of State filing, a federal employer identification number where the entity is incorporated, and a Missouri sales tax number. A zoning clearance letter is required for a company that maintains a physical location inside Kansas City, and is not required for a contractor based outside the city who only performs work there. Plan the sequence backward from your first Kansas City permit. Entity filing, then tax numbers, then workers compensation proof, then the business license, then the trade license that actually lets you pull the mechanical permit. Skipping straight to the permit desk wastes a trip.
Sourcesbizcare.kcmo.gov
St. Louis city: the mechanical license has a commercial threshold
The City of St. Louis licenses mechanical contractors through a Board of Examiners for Mechanical Contractors created by Ordinance 62579 and seated under City Code 25.10.030. The mayor appoints five members: an employing mechanical contractor who works inside the city, a registered professional engineer employed by the city, two journeyman pipefitters, and one owner, lessee or keeper of a commercial mechanical system. They review each applicant's qualifications for licensing. What makes St. Louis unusual among Missouri jurisdictions is how narrowly the ordinance draws its own scope. The published board authority states that the code applies to pressurized piping in air conditioning systems in commercial structures of 14 tons and above, and to pressurized piping in heating systems in commercial structures of 300,000 British Thermal Units and above. It states that the code applies only to commercial structures and does not apply to any residential building with six or fewer dwellings. It also states that the code does not apply to any work with an aggregate mechanical contract price of $25,000 or less, and does not apply to mechanical work performed by employees of an owner, lessee or keeper of the structure where the work happens. Read that carefully before you assume a change out needs the license. A small residential job in the city sits outside this particular ordinance, while a 20 ton commercial rooftop replacement sits squarely inside it. Elevator work is excluded by name. If your book of business in the city is light commercial and large residential, map each recurring job type against those thresholds once, write the answer down, and stop re-litigating it on every bid.
Sourcesstlouis-mo.gov
St. Louis city permits and the graduated business license
Holding the trade license is only half of working legally inside St. Louis. The Building Division issues mechanical permits to licensed mechanical contractors who are certified by the City of Saint Louis, and those permits cover installations such as boilers, furnaces, exhaust fans and hoods, and ventilation systems. To apply you need the property address, a Mechanical Contractor's license issued by the City of St. Louis Building Division, and a registered trades contractor account on the STL City Permits website. A contractor new to the city has to get the city license from the Building Division first, through the Mechanical Section, reachable at 314-622-3313. There is a $25 application fee for each mechanical permit. Walk in permits are available in the Building Division Mechanical Section, Room 425 of City Hall, from 8:00 a.m. to 4:30 p.m. Monday through Friday. The city tells applicants to expect an approved permit or feedback by email within 10 business days, with most applications approved within one to three business days. Companies that pull permits often can set up an escrow account through their stlcitypermits.com account. Separately, the Office of the License Collector requires all contractors and subcontractors performing work or services within the City of St. Louis to obtain a graduated business license for contractors under Ordinance 61094, Section 8.12A of the Revised City Code. That is a tax registration, not a competency test, and it is easy to overlook until a permit clerk asks for it. Budget for both, and put the permit turnaround into the schedule you promise the customer.
Sourcesstlouis-mo.gov 1stlouis-mo.gov 2
St. Charles County: Class A and Class B mechanical licenses
St. Charles County publishes the clearest mechanical licensing rules in the St. Louis metro. The Building and Code Enforcement Division licenses electricians, plumbers, mechanical HVAC contractors, pool installers, drainlayers, third party inspectors and blasters before any permitted work in the county. A Class A license entitles the holder to perform mechanical work without limitation to BTUH or horsepower capacity, and requires the ICC Master Mechanical or National Standard Master Mechanical exam, with accepted test codes F29 for the 2015 code year or G29 for the 2018 code year. A Class B license covers air conditioning systems developing no more than 20 tons of cooling capacity per unit or 500,000 BTUH heating input per unit, plus refrigeration systems of 15 horsepower or less per unit, and requires the ICC Journeyman Mechanical or National Standard Journeyman Mechanical exam, test codes F31 or G31. The county does not require pre-authorization to sit for the exam, so you can test first and apply after. Submittals run through the Citizenserve portal and include the application, a copy of a current driver's license, a front facing photo of the licensee, and the ICC test results. The bond minimum is $10,000 with the licensee named as principal and the power of attorney page included. Liability insurance must show at least $500,000 per occurrence and must list St. Charles County as certificate holder. The division is at 201 N. Second St., Suite 412, St. Charles, and answers at 636-949-7345.
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St. Charles County fees, renewal dates and late penalties
St. Charles County mechanical contractor licenses run on a two year cycle that expires in even numbered years, so 2026 and 2028 are renewal years. The standard license fee is $200 for a two year license. If you apply in an odd numbered year the fee is prorated to $100, because you are buying the back half of the cycle. A new license carries a one time $25 application fee on top of that. The county also sells an inactive status for $50, available only to people who have held the license before. Inactive status keeps the license current without carrying the bond or the liability insurance, which matters if you are stepping back from county work but expect to return. Reactivating means paying the current license fee, either $200 or $100 depending on the year, and filing a current bond and current insurance certificate. Renewal reminders go out by email around November 15 as a courtesy, and the county states plainly that keeping the license current is the licensee's responsibility, not theirs. Renewals and payments must be postmarked by December 31. Miss that and a $25 late fee applies, with another $25 added for each month late up to a four month maximum, so the late fee tops out at $100. The county's own example shows a renewal seven months late still paying $200 plus $100, for $300 total. Let a license sit expired across two or more code cycles, which run three years each, and you may be required to re-test with the International Code Council.
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Columbia: four certificate types and the hours behind each
Columbia licenses the individual mechanic, not just the company. The city's mechanical code makes it unlawful for any person to engage in the installation, alteration or repair of heating, ventilation, air conditioning and refrigeration components or systems on any building or premises inside the city limits without a certificate of competency from the board of mechanical examiners. The director of community development approves applications, grants permission to sit for exams, and issues or revokes certificates. Four types exist: master mechanical HVACR mechanic, called Type A, journeyman as Type B and Type B-1, apprentice as Type C, and chimney sweep as Type D. The apprentice registration requires only an application with name, address, telephone number and the employer's signature, and carries no fee. A journeyman applicant must show positive proof of 8,000 hours of active employment as an apprentice HVACR mechanic, or equivalent experience the director accepts, and must list every previous employer with addresses and telephone numbers. A master applicant must show 12,000 hours as an apprentice or journeyman, and at least 4,000 of those hours must be journeyman level work. Each level then has to pass the required examination. Applicants get at least three days notice of the date, time and place of the exam. Permits are pulled by a licensed master mechanical HVACR mechanic, with a carve out that lets a general contractor pull the mechanical permit on behalf of the master for new one and two family dwellings and for alterations and additions to them.
Sourcescomo.gov 1como.gov 2
Columbia exams, fees, reciprocity and revocation
Columbia names the exams in its ordinance rather than leaving it to staff discretion. The standard examination for master mechanic is the mechanical contractor category, and for journeyman mechanic it is the journeyman HARV category, as prepared and published by Thomson Prometric or the ICC National Standardized Examinations Program. Certificate fees are set in the same code section. A master certificate costs $90 before issuance, a journeyman certificate costs $30, and a chimney sweep certificate costs $90. Renewal comes around every three years, and certificates issued in September, October or November of a renewal year skip the December renewal fee. Business licenses required of mechanical contractors and contracting master mechanics expire annually under Chapter 13 of the city code, so the certificate cycle and the business license cycle do not line up. Reciprocity is written into the ordinance and is unusually direct. A mechanic with 8,000 hours of mechanical experience plus certification of satisfactory completion of a Thomson Prometric, ICC or other mechanical examination administered by a state of the United States shall be granted a journeyman license. At 12,000 hours with the same kind of exam record, the applicant shall be granted a master license. Revocation follows non-disclosure, misstatement or misrepresentation of a material fact, or a penalty imposed under the code. Before revoking, the director must give written notice of the charges and a hearing no sooner than five days later, with sworn testimony and cross examination, and an appeal runs to the circuit court. Someone whose certificate is revoked cannot reapply for one year.
Sourcescomo.gov
Springfield: master and journeyman mechanic certification
Springfield certifies electricians, plumbers, gas fitters and mechanical craftsmen through Building Development Services, which sanctions the tests while a private testing firm administers them on a regular schedule. The city publishes two routes to each level. A master mechanic qualifies with four years as a certified journeyman in the trade, or with ten years of satisfactory experience in the trade. A journeyman mechanic qualifies with four years under the supervision of a master in the trade, or with six years of experience in the trade. Gas certifications sit alongside these: master gas takes four years as a certified gas journeyman, or four years as a master mechanic or plumber plus two years as a gas journeyman. Applications need an Applicant Experience Form for every employer and a separate application packet for each trade, all signed and notarized, listing present and previous employers with detailed job responsibilities and start and end dates. Self employed applicants submit Schedule C filings or 1099s instead. Packets go to the board, which meets the first Thursday of every month at 5:00 p.m. in the Busch Building, and attendance is optional. Approval to test stays good for one year. Springfield also recognizes reciprocity from another jurisdiction if you supply an exam score notification showing at least 75 percent from Prometric, Experior, Block or ICC through Pearson Vue, and the exam must be the identical exam Springfield requires. ICC testing fees run about $125, paid directly to Pearson Vue. Building Development Services answers permit questions at 417-864-1585.
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Springfield certification fees, bond and business license
Springfield charges separately for the certification card and for the business license that lets the company trade. The city's published craft and trade certification fee schedule sets an initial certificate fee after a successful examination of $50.00 for a master craftsman and $25.00 for a journeyman craftsman, and that initial amount includes the annual certificate fee for the balance of the year in which the exam is passed. Initial registration for an apprentice is $10.00. Annual certificate renewal runs $50.00 for a master craftsman, $25.00 for a journeyman craftsman and $10.00 for an apprentice. Appealing under Chapter 36, Article III costs a $500.00 application fee, refunded in full if the appeal is granted. On the business side, Springfield's city code requires bonding and insurance as a license condition for specific industries, and mechanical contractors are named on that list alongside electrical contractors, gas fitters and plumbing contractors. Contractors who carry workers compensation must submit proof of the policy as a license requirement, and contractors who are not required to carry it must sign a notarized exemption statement provided by the License Division. Certification questions go through Building Development Services at 840 Boonville Avenue, first floor of the Busch Municipal Building, with the permit desk open 7:30 a.m. to 4 p.m. Monday through Friday. Treat the two tracks as parallel work streams rather than a sequence, because the testing calendar and the bond underwriting rarely finish on the same day.
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The statewide rule most Missouri HVAC contractors miss: boiler permits
Missouri does not license your trade, but it does regulate specific equipment you install, and the Division of Fire Safety enforces that statewide. Installers of all boilers and pressure vessels falling within the scope of the act are required to obtain an installation permit from the Division of Fire Safety before beginning the installation. The objects covered include hot water heaters with heat input greater than 200,000 British thermal units per hour, hot water heating boilers, steam heating boilers, steam process boilers, pool heaters with heat input greater than 200,000 Btu per hour, and air compressor tanks greater than 10 cubic feet in volume or operating at more than 200 psi. Since November 12, 1986, boilers, hot water heaters and pressure vessels have had to be built to the American Society of Mechanical Engineers Boiler and Pressure Vessel Codes and registered with the National Board of Boiler and Pressure Vessel Inspectors. Residences with fewer than six families are exempt, but common buildings such as recreation centers or pool heaters are not. Used objects cannot be reinstalled unless they are ASME constructed and National Board registered, and variances need approval from the Missouri Board of Boiler and Pressure Vessel Rules, which meets quarterly. The division issues roughly 25,000 certificates of inspection each year and reports about 3,000 violations annually. Operating an object without a valid inspection certificate is a Class A misdemeanor, with fines reaching up to $10,000 per day per object under RSMo 650.270 and RSMo 558.002. Inspection frequency is generally every two years.
Sourcesdfs.dps.mo.gov
EPA Section 608 certification applies on top of every local license
No Missouri city license substitutes for federal refrigerant certification, and no federal certification substitutes for the city license. EPA regulations at 40 CFR Part 82, Subpart F, under Section 608 of the Clean Air Act, require technicians who maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere to be certified. Technicians must pass an EPA approved test administered by an EPA approved certifying organization, and the tests are specific to the equipment type. EPA defines a technician as an individual who attaches and detaches hoses and gauges to measure pressure within an appliance, adds refrigerant to or removes refrigerant from an appliance, or performs any other activity that violates the integrity of a motor vehicle air conditioner like appliance or a small appliance other than disposal. There are four certification types: Type I for servicing small appliances, Type II for servicing or disposing of high pressure and very high pressure appliances other than small appliances and motor vehicle systems, Type III for low pressure appliances, and Universal for all types of equipment. Section 608 technician certification credentials do not expire. A core test taken open book cannot be used toward Universal certification, because the core must be taken as a proctored exam to reach Universal. Apprentices are exempt while closely and continually supervised by a certified technician. For a Missouri company, the practical effect is that your Springfield or Columbia certificate proves competency to a code official, while 608 cards prove compliance to a federal inspector and to any supplier who refuses to sell you refrigerant.
Sourcesepa.gov
Workers compensation, taxes and entity filing in Missouri
Missouri sets a lower workers compensation threshold for construction than for other industries, and HVAC contracting falls on the construction side. Under Section 287.030 of the Revised Statutes of Missouri, an employer generally needs five or more employees to fall under the workers compensation chapter, except that construction industry employers who erect, demolish, alter or repair improvements are deemed employers with one or more employees. The Missouri Department of Labor states the same rule plainly: you must carry workers compensation insurance with five or more employees, unless you are in the construction industry, where one or more employees triggers it. Family members within the third degree of affinity or consanguinity count toward the employee total. Exempt employers that choose not to buy coverage or self insure stay exposed to civil lawsuits from employees injured at work. Sole proprietors and members of a limited liability company are presumed covered unless they opt out. On the tax side, a business must obtain a sales tax license by registering with the Department of Revenue if it makes sales of tangible personal property and taxable services, and should register if it has employees and must remit withholding tax. Registration runs through the online system or Form 2643, the Missouri Tax Registration Application, and the Business Tax Registration line is 573-751-5860. Entity formation goes through the Secretary of State. Several Missouri cities, Kansas City among them, will not issue a business license until the state filings and the workers compensation proof are already in hand.
Sourcesrevisor.mo.gov 1labor.mo.gov 2dor.mo.gov 3sos.mo.gov 4
Advertising, what you may call yourself, and where the risk sits
Because Missouri issues no state HVAC license, there is no statewide rule forcing a license number onto your truck, your website or your written estimates. The obligations are local and they vary, so the safe habit is to show the issuing jurisdiction alongside the number rather than a bare number that reads as a state credential. Never write that your company is state licensed in Missouri for HVAC work. No such credential exists, and a claim like that is exactly the kind of statement the state's consumer protection statute reaches. Section 407.020 of the Revised Statutes of Missouri makes the act, use or employment of any deception, fraud, false pretense, false promise, misrepresentation, unfair practice, or the concealment, suppression or omission of any material fact in connection with the sale or advertisement of any merchandise in trade or commerce an unlawful practice. Services sold to homeowners sit inside that language. Advertising a master level capability while only the journeyman card is current, or advertising service in a city where your license has lapsed, is the common way an otherwise honest contractor ends up on the wrong side of it. Write your marketing so each claim maps to a document you can produce: the city or county that issued the license, the class of that license, the technician certifications your crews hold, and the insurance limits your certificates actually show. Then keep the website in sync with renewals, because an expired number left online is a published claim, not an oversight.
Sourcesrevisor.mo.gov
How a Missouri customer verifies an HVAC contractor
There is no single Missouri database where a homeowner can type in an HVAC company and confirm it is licensed, because the state issues no such license. Verification is local, and telling customers exactly where to look is a conversion tool rather than a risk. Springfield says a key element of protection is hiring contractors that hold the required city license, insurance and bonding, and points residents to its online business license search or to a phone call at 417-864-1617. St. Charles County processes licensing and renewals through its Citizenserve portal, with the Building and Code Enforcement Division reachable at 636-949-7345 for confirmation. In the City of St. Louis, the Building Division Mechanical Section at 314-622-3313 is the office that issued the mechanical contractor license in the first place, and the License Collector's office handles the graduated business license every contractor working in the city must carry. Kansas City routes contractor licensing questions to the Permits Division at 816-513-1500 and business license questions to BizCare at 816-513-2491. Columbia's certificates come from the director of community development under the board of mechanical examiners. For the contractor, the move is to put the jurisdiction, the license class and the verification phone number directly on the estimate. A homeowner who can check you in ninety seconds compares you against bidders who make verification hard, and that comparison usually runs in your favor.
Sourcesspringfieldmo.gov 1springfieldmo.gov 2sccmo.org 3sccmo.org 4stlouis-mo.gov 5stlouis-mo.gov 6bizcare.kcmo.gov 7como.gov 8