Do I need a permit for deck construction or replacement in Unincorporated Lewis County?
We have not yet confirmed which office issues building permits in Unincorporated Lewis County. Ask the Lewis County Commission who handles permits for your address before you start.
The requirements below come from Missouri rules. They are not a statement that Unincorporated Lewis County issues or does not issue permits.
Most likely yes. Deck construction or replacement usually requires a permit in Missouri. Confirm the specifics with Unincorporated Lewis County.
Missouri has no statewide residential building code; whether a permit is required depends entirely on the city or county code that covers the address. Many rural Missouri counties have not adopted a county building code, and a county code applies only outside city limits; inside a city, the city's own code governs. Do not assume the model IRC exemption for small, low, detached decks applies; Missouri has not adopted it statewide, so each local code sets its own exemptions. Missouri law requires notice to the underground facility notification center at least 2 but not more than 10 working days before excavating, including digging on private property (RSMo 319.025 and 319.026). This deck is attached to the house or will have a roof. Where a small deck exemption exists at all, it covers only small, low, freestanding decks that do not serve the home's required exit door, so an attached deck falls outside it. A ledger bolted to the house is the most common point of deck failure, which is why departments inspect the footings, framing and ledger connection before the decking goes on. Adding a roof makes the deck a covered structure that is reviewed like a patio cover or addition, including roof framing and, in high wind areas, uplift connections.
Get your exact answer
Answer a few questions to see the specific permits, documents, and next steps for your deck construction or replacement in Unincorporated Lewis County.
Check my projectDocuments you may need
- Building permit application to the city or county building office, where a local code appliesLikely required
- Site plan showing the deck and its distances to property linesLikely required
- Framing, footing, and ledger attachment detailsLikely required
- Electrical permit if lights or outlets are added, where the local code requires oneSometimes required
Possible inspections
- Footing inspection before concrete is placed, where a local code applies
- Framing inspection before decking hides the structure, where a local code applies
- Final inspection where a permit was issued
Frequently asked questions
- Do I need a permit for deck construction or replacement in Unincorporated Lewis County?
- Most likely yes. Deck construction or replacement usually requires a permit in Missouri. Confirm the specifics with Unincorporated Lewis County. The documents and inspections sections on this page list what the building department typically asks for.
- Who issues the permit in Unincorporated Lewis County?
- We have not yet confirmed which office issues building permits in Unincorporated Lewis County, or whether one does. Ask the Lewis County Commission, which is the county's main government office, who handles permits for your address. Your mailing city is not always the permitting authority.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.