Harrison County, Mississippi Building Permit Guide

Harrison County is the most populous county in Mississippi at about 217,000 residents, the heart of the Gulf Coast between Gulfport and Biloxi. Unlike most of the state, it cannot opt out of building-code enforcement: as one of the five coastal counties, it must enforce hurricane wind and flood-mitigation provisions. It is also a split-district county, with judicial districts and offices in both Gulfport and Biloxi.

This guide covers the coastal mandate and what it requires, the two-district structure, the Marine Resources wetland-permit layer, and where city-limit work goes instead of the county.

This guide covers unincorporated Harrison County. Gulfport, Biloxi, D’Iberville, Long Beach and Pass Christian run their own building departments.

What requires a building permit in Harrison County?

Mississippi is a local-option state: the Mississippi Building Codes Council designates recent editions of the International Codes as statewide minimum codes, and under Senate Bill 2378 of 2014 counties and municipalities must adopt them unless they opted out before 30 November 2014 (Mississippi Code §17-2-4; the five coastal counties have separate wind and flood requirements under §17-2-1). So the first question on any project here is not what the code says — it is whether the county enforces a building code at all, and what it requires where it does.

Where a jurisdiction enforces the code, exemptions are narrow and local, and an exemption from a building permit is never an exemption from zoning, setbacks, floodplain rules, utility approval or a fire review. Confirm scope with the county before work starts rather than after.

Which code applies — and whether one applies

As one of the five coastal jurisdictions that cannot opt out under 2006 House Bill 1406, Harrison County enforces the code with hurricane wind and flood-mitigation amendments — design wind speeds well above inland levels, roof-to-wall connection and windborne-debris standards, and flood-elevation compliance. Work in or over coastal wetlands or waterbottoms — piers, bulkheads, boat ramps, dredging or fill — also needs a Mississippi Department of Marine Resources permit.

Some work is exempt statewide: farm structures once the owner files an affidavit (Mississippi Code §17-2-7), and manufactured housing built to federal standards, certain industrial and utility facilities, buildings on non-public fairgrounds and hunting or fishing camps with an owner’s affidavit (§17-2-9). None of these exemptions reaches floodplain rules. The state minimum codes are the Mississippi Building Code and Mississippi Residential Code, the residential code drawn from the 2021 International Residential Code. How building codes apply in Mississippi

Who handles permitting in Harrison County?

The county enforces the coastal building code and issues permits for unincorporated areas across both districts; Gulfport, Biloxi and the other coastal cities run their own departments.

Because Harrison County runs on two judicial districts, confirm which district a parcel sits in — Gulfport’s first district to the west, Biloxi’s second to the east. On any coastal parcel the wind and flood requirements sit ahead of the building rules: design wind speed, roof-to-wall connections, opening protection and flood elevation frequently decide the structure before design is finished.

Much of the county’s population lives inside incorporated cities that run their own departments, so confirm the jurisdiction from the parcel first; only genuinely unincorporated ground is a county matter.

In 2025, building permits issued in unincorporated Harrison County authorized 511 new privately owned housing units, all of them single-family homes, according to the U.S. Census Bureau Building Permits Survey.

Permit types

Residential permits

Coastal residential work is shaped by wind and flood first: elevated foundations, engineered connections, impact-rated openings and flood-vent detailing. Re-roofs and solar need permits, and state licensing starts above $50,000 for a new home but above $10,000 for a remodel or re-roof — though the coastal permit and inspection still apply.

Commercial permits

Commercial and hospitality work — casinos, retail and lodging along the coast — runs through plan review with wind and flood engineering, and crosses the MSBOC commercial threshold of $50,000.

Mississippi licenses contractors through the Mississippi State Board of Contractors: a commercial certificate of responsibility for commercial and public work of $50,000 or more, a residential builder licence for a new home costing more than $50,000, and a residential remodeling licence for improvements to an existing home costing more than $10,000. Below those amounts Harrison County’s own permit, inspection and registration rules still apply where it enforces the code. Contractor licensing in Mississippi

Harrison County permit costs and fees

Budget the county permit and plan-review fees, separate trade permits, wind and flood engineering and elevation costs, and any Marine Resources permit for work in coastal wetlands or waterbottoms. There is no separate state permit fee.

Fee schedules in Mississippi are set locally and revised on each jurisdiction’s own cycle, so ask Harrison County for the schedule in force on your filing date, and ask separately about plan review, trade, re-inspection and revision charges. How Mississippi permit fees work

Trade permits and who may pull them

Trade permits are generally separate from the building permit and are issued to the licensed installer where a jurisdiction enforces the code. State licensing through the Mississippi State Board of Contractors starts at $50,000 on commercial work and above $10,000 on residential remodeling, and the Board states that residential electrical, plumbing or HVAC work under $10,000 needs no state licence; a jurisdiction may add its own registration, so the credential check depends on both the project value and the jurisdiction. Confirm each before filing rather than after the first correction notice.

Electrical, plumbing and mechanical contractors hold MSBOC classifications on commercial work of $50,000 or more. A jurisdiction that enforces the code may also require local trade registration regardless of project value, while some that have opted out require no local trade permit, so confirm before assuming either way. Trade credentials in Mississippi

How to apply for a Harrison County building permit

In Mississippi, correction cycles turn mostly on the local layer: which code edition Harrison County enforces, whether a coastal or flood-zone parcel triggers wind and elevation requirements, whether the project value crosses a state licensing threshold, and whether the submittal has the sets and forms the office requires. Permits also carry a validity period set by the issuing jurisdiction, so confirm the expiry on phased or delayed work. Review and corrections in Mississippi

Inspections in Harrison County

Where the jurisdiction enforces the code, standard checkpoints include footing and foundation, framing, rough-in trades, insulation and energy, fire systems on commercial work, and final, with occupancy approval before use. Coastal parcels add wind-connection and flood-elevation verification, and work in coastal wetlands carries its Marine Resources permit conditions.

Confirm bookings rather than assuming them, and give the notice the office asks for — an unconfirmed inspection request is a scheduling risk you can remove with one call or visit.

Do not cover work before the required inspection has been approved. Keep the issued permit, the approved plans, energy and wind documentation, product listings, any special-inspection reports and your correction responses available on site.

Harrison County permit search and official resources

Permit records in Mississippi sit with the local authority that issued them — where the county enforces the code, it holds the building permit, the inspection history and the certificate of occupancy for work in unincorporated Harrison County. If you are buying, refinancing or renovating, ask what it holds for the parcel, and confirm that past work was permitted rather than assuming it was.

These are the primary sources behind this guide. Codes, fee schedules and portal procedures change, and a jurisdiction’s own published packet can lag — the adopted ordinance governs, not an un-updated handout. Confirm the position for your filing date.

• Harrison County
• Mississippi Department of Marine Resources
• Mississippi State Board of Contractors
• Mississippi Building Codes Council (Dept of Insurance)
• Mississippi Building Code (BCAP)

Frequently asked questions

Can Harrison County opt out of building codes?

No. As one of the five coastal counties under 2006 House Bill 1406, it cannot opt out and must enforce hurricane wind and flood-mitigation provisions.

Why does Harrison County have two districts?

It is a split-district county with judicial districts and offices in Gulfport (first district) and Biloxi (second district).

What wind design applies here?

Design wind speeds well above inland levels, with roof-to-wall connection, windborne-debris and opening-protection standards, plus flood-elevation compliance.

When is a Marine Resources permit needed?

For work in or over coastal wetlands or waterbottoms — piers, boathouses, bulkheads, boat ramps, dredging or fill — a Mississippi Department of Marine Resources permit is needed in addition to the local building permit.

Do I need a contractor licence for a small coastal job?

A state residential builder licence is required above $50,000 for a new home, and a remodeling or roofing licence above $10,000, but the coastal building permit and inspection still apply below that.

Does the county or the city issue my permit?

Work inside Gulfport, Biloxi and the other cities files with those cities; unincorporated ground is a county matter.

Simplify Harrison County permitting with Alliance Permitting

Harrison County is the mandatory-code, high-wind exception to Mississippi’s patchwork, and the work is front-loaded with wind, flood and wetland questions. Resolving those and the two-district jurisdiction up front keeps a coastal project moving.

Trusted by leading builders, developers, and national contractors — 21+ years of filing in the jurisdictions we write about.

Contractors and builders choose Alliance for Harrison County because the work is done by people who have stood at the counter:

• We resolve wind, flood and wetland requirements before design.
• We confirm the district and city-versus-county jurisdiction.
• We coordinate Marine Resources permits for work in coastal wetlands or waterbottoms.
• We test project value against the MSBOC thresholds.
• We assemble the coastal submittal with wind and elevation documentation.

Alliance Permitting is a permit documentation and submission company in Mississippi. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Harrison County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.