Do I need a permit
in St Louis?

St Louis, MO at a glance

Code adopted

2018 IRC

Local adoption

Frost depth

30–36 in

South shallower

Snow load

15–25 psf

Per IRC

Review time

2–5 wk

KC/STL 3–5 wk

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Deck Fence Kitchen remodel Bathroom remodel Roof Solar Windows Search all 175 →

Project guides for St Louis

Each guide covers the specific permit requirements, fees, and filing procedures for this project in St Louis, MO.

Bathroom remodel in St Louis

Plumbing moves, new circuits, and fixture work that trigger permits.

Deck in St Louis

Size and height thresholds, footings, ledger attachment, and guardrail rules.

Electrical work in St Louis

Panel upgrades, new circuits, service changes, and GFCI/AFCI requirements.

Fence in St Louis

Height limits, setbacks, pool barrier rules, and HOA overlays.

HVAC in St Louis

Equipment replacement, refrigerant rules, and new installation permits.

Kitchen remodel in St Louis

Full remodel combined permits: structural, plumbing, electrical, mechanical.

Roof replacement in St Louis

Tear-off vs overlay, permitted materials, and wind-zone requirements.

Room addition in St Louis

Plan review, foundation engineering, framing inspections, and energy code.

Solar panels in St Louis

Structural roof review, electrical interconnection, and utility approval.

Window replacement in St Louis

Like-for-like exemptions, egress requirements, and energy code.

Missouri context

St Louis permit rules are shaped by state-level codes and local amendments. See the Missouri state guide for code-adoption facts, frost depth, snow load, and other cities we cover in Missouri.