What's Required in Kansas City
- Replacing a furnace, AC, heat pump or ductwork needs a mechanical permit.
- Replacing a component part of an appliance without changing its approval needs no permit.
- Portable units and self-contained systems with 10 pounds or less of refrigerant or motors of 1 horsepower or less need no permit.
- HVAC work must be done by a city-licensed mechanical contractor, except an owner-occupant of a single-family home doing it personally.
- Licensed contractors replacing AC equipment in an existing system may use the LSR program and self-certify the work.
- A new circuit for the equipment needs a separate electrical permit.
- New ducts and systems in an alteration must meet the 2021 IECC, with Manual J, S and D data on the plans or the mechanical permit.
Do You Need a Permit to Replace a Furnace or AC in Kansas City?
Yes for the equipment, no for most repairs. Section 18-16(b)(2) of the Kansas City Building and Rehabilitation Code exempts from the mechanical permit replacing a component part or assembly of an appliance that does not change its original approval, portable heaters and cooling units, replacement grills and diffusers, and self-contained refrigeration systems with 10 pounds or less of refrigerant or motors of 1 horsepower or less, which covers typical window units. Replacing a furnace, air conditioner, heat pump or ductwork is not on the list, so it takes a mechanical permit. This page covers Kansas City, Missouri (KCMO). Kansas City, Kansas, across the state line, is a separate city with its own permit office and rules.
Kansas City HVAC Permit Rules by Scenario
| What you are doing | City filing | Rule |
|---|---|---|
| Replacing a blower motor, capacitor or control board | None | KCBRC 18-16(b)(2)e |
| Window or portable AC unit | None | KCBRC 18-16(b)(2)c, h |
| Replacing AC equipment in an existing system | Mechanical permit; LSR self-certification allowed | IB108 |
| Replacing a gas furnace | Mechanical permit | KCBRC 18-14(a); 18-16 |
| Extending ductwork up to 10 ft | LSR permit, contractor self-certifies | IB108 |
| New system, heat pump or mini-split with a new circuit | Mechanical permit plus electrical permit | KCBRC 18-16; 18-327 |
| Replacing grills and diffusers | None | KCBRC 18-16(b)(2)g |
What Is the LSR Program?
Information Bulletin 108's Limited Service and Repair program lets licensed contractors certify that minor work meets the code instead of scheduling a city inspection. It covers installation or replacement of air conditioning equipment in an existing mechanical system regardless of cost, plus duct extensions of up to 10 feet and other work valued at $1,000 or less on existing one- and two-family homes. If the contractor starts first, the LSR permit must be obtained within 7 days of starting and the certification filed within 7 days of finishing. It does not apply to new construction or additions; furnace replacements outside those categories go through the regular permit and inspection.
How Much Does an HVAC Permit Cost in Kansas City?
Mechanical permits for one- and two-family homes use the valuation table in Section 18-20(b)(2): $52 up to $1,000, $58 from $1,001 to $2,000, then $58 plus $4.33 for each additional $1,000 or fraction. A $5,000 AC or furnace replacement pays $58 + 3 × $4.33 = $70.99; a $12,000 furnace and AC replacement pays $58 + 10 × $4.33 = $101.30. If the job needs a new circuit, add an electrical permit, from $52. New ducts and systems installed in an alteration must meet the 2021 energy code, and Manual J, S and D design data may be deferred to the mechanical permit.
Who Can Do the Work?
HVAC work in Kansas City requires a city-licensed mechanical contractor. That license covers installing and replacing heating, duct and air conditioning equipment, the gas connection from the nearest shutoff valve to a warm-air furnace's burner, and the power connection from the equipment disconnect. Other gas appliances, such as water heaters, fall to gas-fired appliance or plumbing contractors. An owner who lives in a single-family home may pull the mechanical permit and do the work personally; on a two-family home only licensed contractors may.
How to Get a HVAC Permit in Kansas City
Confirm it is permit work
Parts, window units and grills need nothing; replacing the furnace, AC, heat pump or ducts needs a mechanical permit.
Hire a licensed contractor
Check the city's licensed-contractor database, or file the IB146 affidavit if you own, live in and will personally do the work on a single-family home.
Apply in CompassKC
The contractor files the mechanical permit with the job value; AC-only swaps can go through the LSR program.
Pay the valuation fee
Expect $70.99 for a $5,000 job or $101.30 for a $12,000 job, plus an electrical permit if a new circuit is run.
Inspect or self-certify
Regular permits get a city inspection booked through CompassKC or 816-513-1500; LSR work is certified by the contractor within 7 days.