Mississippi · State Deck Permit Guide

Mississippi Deck Permit Requirements (2025)

Updated January 2025Code: IRC 2015
⚠ Mississippi Quick Answer

Mississippi adopted the IRC 2015. Enforcement varies by county. Urban areas (Jackson metro, Gulfport/Biloxi coastal) have active building departments. Many rural Mississippi counties have minimal residential building permit requirements. Coastal Mississippi properties in wind zones need to account for hurricane loads.

Building Code Framework in Mississippi

Mississippi uses the IRC 2015 as its residential building code foundation. This sets the structural baseline for deck construction — ledger attachment, framing, footings, and railing requirements. Local counties and cities may adopt amendments.

Permit strictness level for Mississippi: Lenient. Always confirm the specific threshold with your local building department before starting any deck project.

When Is a Permit Required?

In most Mississippi jurisdictions, a building permit is required for: any deck attached to the house via a ledger board; any deck elevated 30 inches or more above grade; freestanding decks exceeding the local size threshold (commonly 200 sq ft); and any deck with a permanent overhead cover (pergola or roof).

Ground-level freestanding decks under the local size threshold may be exempt in some Mississippi jurisdictions — but this must be confirmed locally, as exemptions are not universal.

Key Technical Requirements

Frost depth: 0–6 inches. Footings must extend below this depth to prevent frost heave.

Railing requirement: Decks 30 inches or more above grade require guardrails with a minimum 36-inch height. Baluster spacing must prevent a 4-inch sphere from passing through.

Ledger attachment: Attached decks must use lag bolts per IRC Table R507.9.1.3(1) with proper flashing to prevent water infiltration — the leading cause of structural deck failures.

Pressure-treated lumber: All lumber in contact with concrete or soil requires ground-contact-rated treatment (UC4A minimum). Above-grade lumber must be UC3B rated minimum or naturally decay-resistant species.

Permit Application Process in Mississippi

Permits in Mississippi are issued by local city or county building departments — not a state agency. To apply:

  1. Prepare your four drawings: site plan, framing plan, elevation, and footing detail
  2. Find your local building department's permit portal (search your city/county name + "building permits")
  3. Submit online or in person and pay the permit fee
  4. Wait for plan review — typically 5–15 business days for residential decks
  5. Post the approved permit at the construction site
  6. Schedule and pass inspections: footing, framing, and final

Download our free Deck Permit Application Checklist to prepare your drawings and inspections.

Frequently Asked Questions — Mississippi Deck Permits

Who issues deck permits in Mississippi?+
Deck permits in Mississippi are issued by your local city or county building department, not a state agency. Search for your city or county name plus "building permits" to find the right contact. If you live outside city limits in an unincorporated area, contact your county building department directly.
Can I apply for my own deck permit in Mississippi without a contractor?+
Yes. Most Mississippi jurisdictions allow homeowners to apply as owner-builders for permits on their primary residence. You'll need to prepare the required drawings and pass the same inspections a contractor would. Check with your specific building department for any owner-builder restrictions that may apply locally.
How much does a deck permit cost in Mississippi?+
Permit fees in Mississippi vary by jurisdiction. Most use a valuation-based formula (typically 1–5% of construction value) or a flat fee. For a typical residential deck valued at ,000–mississippi5,000, expect permit fees in the range of mississippi00–0–6 inches00. See our permit costs guide for state-by-state fee comparison data.
Related: Do I need a permit? · Draw deck plans · Permit costs · Permit checker