Forrest County, Mississippi Building Permit Guide

Forrest County, in the Pine Belt of south-central Mississippi, has about 79,000 residents and is anchored by Hattiesburg, home of the University of Southern Mississippi. The county does not administer a building code: its Planning Department handles floodplain, stormwater and subdivision rules in unincorporated areas, while Hattiesburg and Petal run their own building departments.

This guide covers what the county handles in unincorporated areas, the Leaf River floodplain context, the statewide opt-out framework, and where city-limit work goes instead.

This guide covers unincorporated Forrest County. Hattiesburg and Petal run their own building programmes.

What requires a building permit in Forrest 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

Forrest County does not administer a building code in its unincorporated areas. Its Planning Department states that it does not issue certificates of occupancy or administer building codes, but it does enforce a stormwater ordinance, a floodplain development ordinance and subdivision regulations, and it asks anyone planning development, small or large, to contact the office first. State law still requires every county to require permitting as a condition of construction in its unincorporated areas, recording the contractor’s material purchase certificate or taxpayer ID number, whether or not it has adopted codes (Miss. Code § 19-5-9(11), amended in 2022). The Planning page links a Contractor Information Form; ask the department what it needs for your project.

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 Forrest County?

The Forrest County Planning Department (601-584-6162; county offices at 641 North Main Street, Hattiesburg, 601-545-6000) handles floodplain permits, stormwater permits and subdivision review for unincorporated Forrest County. Hattiesburg and Petal run their own building departments.

Because Hattiesburg holds most of the county’s population and runs its own department, confirm the jurisdiction from the parcel first; only genuinely unincorporated ground is a county matter. On Leaf River and low-lying parcels, floodplain review sits ahead of construction.

Permit types

Residential permits

Unincorporated residential work spans rural and large-lot construction and subdivision growth. The county does no building-code plan review or inspections, but floodplain permits and elevation certificates apply in mapped flood areas, and state licensing starts above $50,000 for a new home but above $10,000 for a remodel or re-roof.

Commercial permits

Commercial work in unincorporated areas goes through the county’s floodplain, stormwater and subdivision rules rather than a county building-code review. Commercial work of $50,000 or more needs an MSBOC certificate of responsibility.

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 Forrest County’s own permit, inspection and registration rules still apply where it enforces the code. Contractor licensing in Mississippi

Forrest County permit costs and fees

The county charges no fee for its floodplain permits and certifications, according to its Summary of Development Process. Budget instead for elevation certificates by a licensed engineer or surveyor where a parcel is in the floodplain, and for a stormwater permit and Stormwater Pollution Prevention Plan where a site disturbs more than one acre (above five acres the permit comes from the Mississippi Department of Environmental Quality). There is no separate state permit fee.

Fee schedules in Mississippi are set locally and revised on each jurisdiction’s own cycle, so ask Forrest 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 Forrest County building permit

In Mississippi, correction cycles turn mostly on the local layer: which code edition Forrest 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 Forrest County

Forrest County does no building-code inspections in unincorporated areas and issues no certificate of occupancy. In the floodplain, elevation certificates completed by a licensed engineer or surveyor must be provided before, during and after construction, and every development needs an address from the Forrest County Emergency Management District. Inside Hattiesburg and Petal, the city building departments inspect.

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.

Forrest County permit search and official resources

Permit records in Mississippi sit with the local authority that issued them. Forrest County issues no building permits or certificates of occupancy for unincorporated areas; its Planning Department holds floodplain, stormwater and subdivision records. Hattiesburg and Petal hold the building records for work inside their limits. If you are buying, refinancing or renovating, ask what each office holds for the parcel.

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.

• Forrest County Planning Department
• City of Hattiesburg
• Mississippi State Board of Contractors
• Mississippi Building Codes Council (Dept of Insurance)
• Mississippi Building Code (BCAP)

Frequently asked questions

Where do I get a Forrest County building permit?

Forrest County issues no building-code permits. For unincorporated land, contact the Forrest County Planning Department (601-584-6162) about floodplain, stormwater and subdivision approvals and the contractor information it requires; Hattiesburg and Petal run their own building departments.

Is floodplain review common here?

Where a parcel is in a mapped flood area, yes. The Leaf River and its tributaries put some ground in or near a mapped floodplain, and the county issues floodplain permits, at no charge, with elevation certificates required, so confirm status early.

Does the state building code apply automatically?

No. Forrest County does not administer a building code in its unincorporated areas; Hattiesburg and Petal run their own building departments and inspections.

Do I need a contractor licence for a small county 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 a local permit and inspection may still apply where the code is enforced.

Who handles septic and wells?

The Mississippi State Department of Health regulates on-site wastewater; a rural build usually needs a permitted system before occupancy.

How do I run a Forrest County permit search?

Ask the county what it holds for the parcel; city work sits with the city that issued it.

Simplify Forrest County permitting with Alliance Permitting

Forrest County work turns on jurisdiction first — usually whether a parcel is inside Hattiesburg or Petal — and then, in unincorporated areas, on the county’s floodplain, stormwater and subdivision rules.

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

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

• We confirm city-versus-county jurisdiction from the parcel.
• We check Leaf River floodplain status early.
• We check the county’s floodplain, stormwater and subdivision requirements.
• We test project value against the MSBOC thresholds.
• We confirm trade credentials for the jurisdiction and value.

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 Forrest County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.