HVAC contractors in
St Louis, Missouri.
A public directory of licensed hvac contractors serving greater St Louis. Market data, licensing requirements, and cost benchmarks — updated continuously from public sources.
Common Job Costs
Licensing Requirements
Licensing Requirements
Missouri requires Mechanical Contractor License through the Division of Professional Registration. Must pass PSI Services exam, provide proof of 4 years experience or formal training, maintain $10,000 surety bond. Individual technicians need EPA Section 608 certification for refrigerant handling. License renewal every 2 years with continuing education requirements.
Permit Requirements
City of St. Louis requires mechanical permits for HVAC installations, replacements, and major repairs. Permit fees range $50-200 depending on scope. Submit plans for commercial work over $5000 value.
Inspection Schedule
Rough-in inspection before concealing work, final inspection upon completion. Commercial projects require additional inspections per International Mechanical Code. Schedule 24-48 hours in advance.
Insurance Minimums
General liability minimum $300,000, workers compensation required for employees, professional liability recommended. Many municipalities require $500,000 minimum for permit applications.
How to Get Licensed
Meet experience requirements
Document 4 years of HVAC experience or complete formal training program approved by Missouri Division of Professional Registration
Obtain EPA certification
Pass EPA Section 608 certification exam for refrigerant handling - required for all HVAC work involving refrigerants
Apply for state license
Submit Missouri Mechanical Contractor License application with experience documentation, references, and application fee
Pass PSI examination
Schedule and pass PSI Services mechanical contractor examination covering codes, safety, and trade practices
Secure surety bond
Obtain $10,000 surety bond from approved provider and submit bond documentation with license application
Complete licensing process
Receive license approval and ensure renewal every 2 years with required continuing education hours
About This Market
St. Louis HVAC market runs hot with 1,879 licensed establishments across Missouri competing for steady residential and commercial work. Extreme summer heat drives AC replacement demand while old housing stock in the city creates consistent ductwork and system upgrade opportunities. Competition keeps margins tight, but skilled contractors with quick response times command premium rates during peak season. Winter heating failures and summer AC breakdowns generate the most profitable emergency calls. Getting licensed in Missouri means jumping through hoops with the state board, taking exams, and proving your experience. Local permit requirements in St. Louis are straightforward but mandatory for most jobs worth doing. Peak season runs May through September when everyone's AC dies at once - plan your capacity and pricing accordingly. The old housing stock means you'll deal with everything from 1950s ductwork to modern high-efficiency installs, so keep your skills sharp across all equipment types.
- Licensed establishments countUS Census Bureau
- Licensing requirementsMissouri Division of Professional Registration
- Permit requirementsCity of St. Louis Building Division
- Cost rangesLocal market estimates
- Insurance minimumsMissouri state regulations
Frequently Asked Questions
What license do I need to do HVAC work in Missouri?
Missouri Mechanical Contractor License through Division of Professional Registration, plus EPA 608 certification for refrigerant work. Requires 4 years experience and passing PSI exam.
How much does a new furnace cost in St. Louis?
Furnace replacement ranges $2,800-$6,500 installed, depending on efficiency rating, size, and complexity of installation. High-efficiency units cost more upfront but qualify for utility rebates.
Do I need permits for HVAC work in St. Louis?
Yes, City of St. Louis requires mechanical permits for installations, replacements, and major repairs. Permits cost $50-200 and require inspections per International Mechanical Code.
What insurance do HVAC contractors need in Missouri?
Minimum $300,000 general liability, workers compensation for employees, and many cities require $500,000 minimum for permits. Professional liability coverage recommended for complex installations.
When is peak season for HVAC work in St. Louis?
May through September for cooling system work due to hot, humid summers. Secondary peak October-November for heating system maintenance before winter. Emergency calls spike during temperature extremes.
HVAC contractors in St Louis
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