HVAC permits in Missouri
When a permit is needed to replace a furnace, AC or heat pump in Missouri, what it costs by city, and who pulls it.
Varies
Permit for a replacement
state default
—
Typical fee
where we have one
0
Cities with verified
fee schedules
Do you need a permit?
Permit rules in Missouri are set by each city or county. ICC chart (Jan 2024) shows IRC adopted only by some local jurisdictions; permit rules are local, and some rural/unincorporated areas have no residential permits. IRC R105.1 requires a permit to install or replace mechanical equipment; R105.2 exempts only portable units and minor parts (https://codes.iccsafe.org/content/IRC2021P2/chapter-1-scope-and-administration). State default fee not set: fees are set by local jurisdictions (see city rows).
Why it matters
- An inspection catches unsafe gas, venting and electrical work.
- Unpermitted work can void equipment warranties and complicate a home sale.
- Some rebates require proof of a permit.
Sources
- Missouri (state) — https://www.iccsafe.org/wp-content/uploads/Master-I-Code-Adoption-Chart-Jan-2023.pdf
Second opinion
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