Do I Need a Permit to Build a Deck in Kansas City, MO?

Interactive check

Check your deck details

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Fees

Estimated city fees

Baseline for a simple permitted deck: $225–$625 estimated combined fees (permit + plan review) for a typical permitted residential deck in Kansas City, MO

Fee	Amount	Notes
Building permit fee	$150–$450 (estimated, based on declared project valuation)	KCMO City Planning & Development calculates permit fees based on construction valuation. A typical residential deck falls in this range. Verify the current schedule at kcmo.gov.
Plan review fee	$75–$175 (estimated)	Plan review fees are assessed separately for residential projects requiring plan check. Simple residential decks may qualify for express review if all documents are complete at submittal through ePLAN.
Inspections	Included with permit; reinspection fees extra	Required inspections (footing, framing, final) are covered under the permit. Reinspection fees apply if work fails or is not ready when the inspector arrives.

Documents

Required documents

Building permit application submitted electronically through KCMO ePLAN (https://kcmo.gov/city-hall/departments/city-planning-development).
Site plan drawn to scale showing property lines, existing structures, proposed deck footprint, setback dimensions, easements, and distance to property lines.
Construction drawings showing deck dimensions, height above finished grade, framing layout, footing design with frost-depth documentation (minimum 30–36 inches below grade in KC), beam and joist schedule, ledger attachment detail with flashing (if attached), and stair/guardrail details per 2018 IRC.
Footing design documentation showing frost depth compliance — the primary local design constraint for decks in the Kansas City climate.
Zoning verification confirming compliance with applicable KCMO yard setbacks and lot-coverage limits for the applicable zoning district.
Contractor license documentation or owner-builder authorization depending on who applies for the permit.
Any HOA approval required by subdivision covenants before structural additions.

Timeline

Typical timing

Plan review: 10–20 business days (ePLAN electronic review; straightforward residential projects with complete submittals move faster)
Total cycle: 4–8 weeks from ePLAN submittal to final inspection

ePLAN streamlines the submittal process but correction cycles and inspection scheduling still affect total timing. Kansas City's workload varies seasonally — spring and early summer permitting seasons tend to be busier.

Process

How the permit process works

Confirm permit requirements and zoning Verify whether the deck is attached, exceeds 30 inches above grade, or exceeds 200 square feet as a freestanding structure. Check KCMO's zoning map to confirm required setbacks for your zoning district. Contact KCMO City Planning & Development at 816-513-1500 if you have questions about thresholds or zoning.
Prepare IRC-compliant plans with frost-depth footings Draw up a site plan and construction drawings per the 2018 IRC and KCMO local amendments. The defining local requirement for KC decks is frost-depth footings: footings must extend 30–36 inches below grade (below the frost line) to prevent heaving during Kansas City winters. This must be documented in your plans before submittal.
Submit electronically through KCMO ePLAN Kansas City requires all residential permit applications to be submitted through the ePLAN electronic plan review system. Create an account at the KCMO ePLAN portal, upload your plans and application, and submit for review. Paper submittals are not accepted.
Clear plan review comments KCMO plan reviewers check the submittal against the 2018 IRC and KCMO amendments. Frost-depth footing documentation and ledger connection details are commonly reviewed. If corrections are requested, revise and resubmit through ePLAN.
Pay fees and receive the permit Once plan review is approved, pay remaining permit fees. Keep the issued permit and approved plans at the job site during construction as required by Kansas City Code.
Schedule required inspections Request inspections through the KCMO inspection scheduling system as work progresses. Required deck inspections typically include: a footing inspection before pouring concrete (to verify frost depth), a framing inspection after structural members are placed but before covering, and a final inspection upon completion.
Pass final inspection and close the permit After final inspection sign-off, the permit is closed and the deck becomes part of the official KCMO building record. This matters for insurance, resale disclosure requirements under Missouri law, and future permit applications.

Code basis

What Kansas City reviews against

2018 International Residential Code (IRC) with City of Kansas City, Missouri local amendments, administered by KCMO City Planning & Development. Missouri has no statewide building or energy code — all residential construction requirements come from the city's locally adopted IRC edition and amendments. The most consequential local deck requirement is frost-depth footings: footings must extend below the frost line (30–36 inches minimum in the KC area) to prevent seasonal heave.

Residential permit page Kansas City permit portal

If you skip the permit

What can go wrong

KCMO can issue a stop-work order if unpermitted deck construction is discovered, halting all work immediately.
You may be required to remove or expose completed work so inspectors can verify footing depth, frost-depth compliance, framing, and connection details.
Shallow footings — the most common failure in unpermitted KC decks — can shift or heave significantly during freeze-thaw cycles, creating structural and safety hazards that go undiscovered without permit inspection.
Daily civil fines can accumulate under KCMO Code until the violation is corrected.
Missouri law requires disclosure of unpermitted work in real estate transactions, which can complicate or delay a home sale.
After-the-fact permits in Kansas City carry penalty fees and typically require invasive inspection of existing footings and framing.

FAQ

Common Kansas City deck permit questions

Do I need a permit to build a deck in Kansas City, MO?

Usually yes. A permit is required for any deck attached to the house, any deck more than 30 inches above grade, and any freestanding deck larger than 200 square feet. A small freestanding deck at or below 30 inches and 200 square feet or less may not require a building permit, but KCMO zoning setbacks still apply. When in doubt, contact KCMO City Planning & Development at 816-513-1500 before starting work.

What building code does Kansas City use for deck permits?

Kansas City enforces the 2018 International Residential Code (IRC) with KCMO local amendments. Missouri has no statewide building or energy code — each city adopts its own edition. For decks, the most important local design requirement is frost-depth footings: footings must extend at least 30–36 inches below grade in the Kansas City area to prevent frost heave, which is a common cause of deck settlement and structural failure in Midwest climates.

What is the KCMO ePLAN system?

KCMO ePLAN is Kansas City's electronic plan review and permit submission system. All residential building permit applications must be submitted through ePLAN — paper submittals are not accepted. Create an account at the KCMO City Planning & Development portal, upload your plans and application documents, and submit for electronic review. The ePLAN system allows you to track review status and respond to correction comments online.

What footing depth is required for a deck in Kansas City?

Footings must extend below the frost line — a minimum of 30–36 inches below finished grade in the Kansas City area. This is required by the 2018 IRC as adopted by KCMO to prevent frost heave: seasonal freezing and thawing of the soil can shift shallow footings significantly, causing the deck to settle, rack, or fail. The footing inspection (before concrete is poured) is the most critical inspection for Kansas City deck permits.

How much does a deck permit cost in Kansas City?

Estimated combined fees (permit plus plan review) for a typical residential deck in Kansas City run approximately $225–$625, based on declared construction valuation. Verify the current fee schedule at kcmo.gov — fees are adjusted periodically.

Does Missouri have a state building code for decks?

No. Missouri has no statewide residential building code or energy code. All deck permit requirements in Kansas City come from the city's locally adopted edition of the IRC (currently 2018 IRC) and KCMO amendments. Requirements differ by city across Missouri — Kansas City's code, adopted edition, and local amendments may differ from those in St. Louis, Springfield, or other Missouri cities.

How does Missouri's net metering law relate to building a deck in Kansas City?

Missouri requires investor-owned utilities including Evergy to offer 1:1 net metering at retail rate for residential solar systems up to 100 kW — one of the most generous net metering policies in the country. If you are building a deck and also considering rooftop solar, Missouri's strong net metering framework improves the long-term economics of solar in KC. See the Kansas City Solar Savings Calculator for Evergy rate and payback details.

Sources

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