Simpson County, MS: Owner-Builder Allowed

Unincorporated Simpson County, Mississippi requires building permits and inspections for residential and commercial construction through the Office of Community Development¹. Countywide zoning could not be confirmed, while property inside Magee is subject to city zoning rules²³. Septic permits remain with the Mississippi State Department of Health for Simpson County properties where public sewer is unavailable, including addresses inside municipalities⁴⁵.

At a glance

Building permit: Required for residential and commercial construction in unincorporated Simpson County¹
Remodeling: A county building permit is required for remodeling projects⁶
Manufactured home: File the county permit before moving the home onto the property⁶
Zoning: Countywide zoning is unconfirmed; Magee has city-specific zoning rules²⁷
Septic: MSDH requires permits and installation inspections for new septic systems; property-sale inspections are recommended⁴⁵⁸⁹
RV or tiny home: Countywide permission is unconfirmed; Magee allows qualifying prefab tiny homes subject to city codes²³
Owner-builder: The state licensing exemption for work on your own residence does not waive county permits¹⁰¹
Minimum home size: Unconfirmed countywide; Magee sets district-specific minimums, including for RE homes and R-3 units²¹¹¹²

Who to call

Building permits

Simpson County Community Development Department

Building, remodeling, manufactured-home and contractor permits in Simpson County

601-675-2366

communitydevelopment@co.simpson.ms.us

Septic permits

Mississippi State Department of Health Division of On-Site Wastewater

On-site wastewater applications, site evaluations and septic-system assistance for Simpson County

1-855-220-0192

wastewater@msdh.ms.gov

570 East Woodrow Wilson Drive, Jackson, MS 39216

Online permits →

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Simpson County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Simpson County, Mississippi?

Yes. Unincorporated Simpson County requires building permits and inspections for residential and commercial construction, with the Office of Community Development issuing the permits¹. The county says a building permit is also required for remodeling projects⁶. A manufactured home requires a permit filed before the home is moved onto the property⁶. Simpson County's ordinance calls for inspections under the 2021 IRC and IBC¹. Inside Magee, the city issues its own building permits before covered construction or alterations proceed; the county guidance here concerns unincorporated land¹³¹. Septic systems inside Magee remain with MSDH where public sewer is unavailable¹⁴.

Who handles Simpson County building permits, and how do you reach the office?

The Simpson County Community Development Department handles building, remodeling, manufactured-home and contractor permits⁶. Call 601-675-2366 or email communitydevelopment@co.simpson.ms.us during the office's weekday business hours⁶. The county tells general contractors, HVAC installers, electricians and plumbers operating in Simpson County to file an office permit and renew it annually⁶. Ask Community Development for the current application, fee schedule, required plan set and inspection sequence before design or site work begins, because those process details could not be confirmed⁶. For a manufactured home, contact the office before delivery; Simpson County says the permit must be filed before the unit is moved onto the property⁶.

Does Simpson County have zoning?

We could not confirm a countywide zoning ordinance or an official statement that unincorporated Simpson County has no zoning². Ask the Simpson County Community Development Department about parcel-specific zoning approval, uses, setbacks, minimum lot size and accessory dwellings before relying on a seller's description⁶. Inside the City of Magee, city zoning sets district-specific dimensions: the RE district requires at least 2,200 square feet of floor area for a single-family detached dwelling, while R-3 multiple-family units require at least 500, 700 or 900 square feet depending on bedroom count¹¹¹². Magee also varies lot area by district and sewer availability¹⁵. Magee's zoning rules do not establish a minimum home size or zoning approval for unincorporated land, and they do not move septic permitting away from MSDH²¹⁶. Simpson County's building-permit requirement still applies to covered unincorporated construction even though countywide zoning remains unresolved¹².

How do septic permits work in Simpson County?

The Mississippi State Department of Health handles on-site wastewater permitting for Simpson County properties where public sewer is unavailable⁴⁵. Submit the septic application and required documents to MSDH; the agency reviews the filing before invoicing, and payment is required before the property visit¹⁷. For a new septic system in Simpson County, an MSDH Environmentalist evaluates the property and issues a Permit/Recommendation; a certified installer must contact MSDH before installation⁵. MSDH inspects the installed system and issues Final Approval after the required affidavits are provided⁸⁵. A permanent sewer or septic solution is required before a permanent water-meter connection, so settle wastewater early in the building schedule¹⁸. The state does not require a septic inspection solely for a real-estate transaction, although MSDH recommends one and a lender, utility, buyer, seller or local government may request it⁹. Current MSDH fees are $197.50 for the Notice of Intent plus Final Approval and $100 for an existing residential inspection; processing or other charges may apply, and fees can change¹⁹. Only about 7.8% of Simpson County soils are rated without severe limitations for a conventional drain field, so make the site evaluation an early purchase contingency²⁰.

Can you live in an RV or tiny home on your land in Simpson County?

We could not confirm an unincorporated Simpson County rule that allows or prohibits long-term RV living, temporary private-land camping or tiny-home occupancy². Ask the Simpson County Community Development Department about zoning approval and the residential building permit before placing a unit⁶¹. Inside Magee, qualifying prefab tiny homes and accessory dwelling units are treated as single-family dwellings subject to city zoning, building rules and other codes; mobile and manufactured homes are excluded from that definition³. Magee's rule does not authorize a tiny home elsewhere in Simpson County³. A manufactured home requires a county permit before it is moved onto the property⁶. MSDH treats a hunting camp as a residential wastewater application, while a property with three or more trailers, cabins or RVs needs a commercial-development wastewater application; that classification does not itself authorize camping or occupancy²¹. Mississippi requires wastewater, including gray water, to go to sewer or septic rather than onto the ground, into a ditch or into a body of water²².

Building a home in Simpson County: the steps, in order

Confirm whether the parcel is in unincorporated Simpson County or a municipality; ask Community Development about county zoning approval and the residential building-permit checklist²⁶.
If the parcel is in Magee, identify its city zoning district and verify the applicable minimum floor area, setbacks and lot area before laying out the project¹¹¹²⁷¹⁵.
Where public sewer is unavailable, submit the septic-permit application and required documents to MSDH; payment is due before the property visit⁵¹⁷.
Use the wastewater evaluation to fix the house and septic-system locations, then submit the residential building-permit materials requested by Community Development¹⁷¹.
If acting as your own general contractor on your own residence, treat the state owner-builder provision as a licensing exemption, not a building-permit exemption¹⁰¹.
Complete MSDH's installation-inspection and final-approval steps before requesting permanent water service¹⁷¹⁸.
For access onto a state highway, obtain the required MDOT driveway permit²³.
Ask Community Development which building inspections and close-out documents are required before occupancy because a local certificate-of-occupancy rule could not be confirmed⁶.

What should you check before buying land in Simpson County?

Start with septic suitability: only about 7.8% of Simpson County soils are rated without severe limitations for a conventional drain field²⁰. The county receives about 58.8 inches of precipitation annually, while about 69.6% of its land has a slope of 15% or less and about 76.1% is wooded; inspect the actual tract for drainage, clearing and driveway costs²⁴²⁵²⁶. If the parcel will be divided, ask both Community Development and MSDH about review before relying on a proposed lot layout: MSDH defines a subdivision as ten or more lots, county ordinances may set a lower threshold, and public-water developments may require review regardless of lot count²⁷. Confirm legal access, and remember that a new or altered driveway connecting to a state highway requires an MDOT permit²³. Mississippi exempts a potable-water well serving only one household from the groundwater-withdrawal permit, and also exempts wells with surface casing under 6 inches subject to prohibited-use and reporting rules; public-water-system wells remain regulated regardless of size²⁸²⁹. Before closing, ask Community Development about zoning and floodplain review because neither process could be confirmed²⁶.

Watch-outs

Do not treat the unconfirmed zoning record as permission for any use; ask Simpson County Community Development about the parcel, setbacks and occupancy plan²⁶.
New septic systems in Simpson County require an MSDH permit and installation inspection; permanent sewage disposal must be available before a permanent water-meter connection⁵⁸¹⁸.
The owner-builder licensing exemption does not cancel Simpson County's building-permit requirement¹⁰¹.

Sources

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Compared with neighboring counties

Rule	Simpson County	Lawrence County	Jefferson Davis County	Covington County	Smith County	Rankin County	Copiah County
Building permit	Required	Not published	Not published	Not published	Not published	Required	Not published
County zoning	Not published	Not published	Not published	Not published	No	Yes	Not published
Septic permits	MS State Dept. of Health	MS State Dept. of Health	MS State Dept. of Health	MSDH	MS State Dept. of Health	MS State Dept. of Health	MSDH

How Simpson County scores

Seclusion46100% ev.

Self-Sufficiency69100% ev.

Admin Boringness5377% ev.

Durability64100% ev.

Property Autonomy39100% ev.

Carry Cost86100% ev.

Evidence strength: 96%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$159kTypical home

0.6%Property tax

$3,201Land / acre

58.8"Annual rain

4.5% of yrsSevere drought

11.9 / yr (+10.6)Mid-century 100°F days

16.7 daysMid-century dry spell

2.89" (+7%)Mid-century 1-day rain

1.44×Wildfire change factor

100%Forward climate coverage

$2,082Home insurance / yr

1.1% / yrInsurance growth

1.66%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

40,360People within 30 min

1,429,147People within 2 hr

32,366Radius comparison (15 mi)

43.6People / sq mi

0%Federal land

69.6%Land at 15% slope or less

7.8%Soils rated "not limited" for septic (strict USDA rating)

29,046 acWorkable land screen

76.1%Wooded land

53.2 tonsBiomass / forest ac

65°FAvg temp

Answers from the rulebook for Simpson County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Simpson County rules

Building permitRequired
The Board of Supervisors adopted an ordinance (Jan 6, 2025) requiring building permits and 2021 IRC/IBC inspections for residential and commercial construction in unincorporated areas, issued by the Office of Community Development.
Simpson County - Permits and Zoning (Office of Community Development) ↗Scouted from the county site, not yet independently re-checked

Mississippi rules that apply here

Owner-builder exemptionAvailable (with conditions)
A person undertaking construction or improvement on the person's own residence or acting as the person's own general contractor for construction or improvement on that residence, for purposes of Mississippi residential builder and remodeler licensing requirements.
- The exemption concerns the licensing chapter for residential builders and remodelers; it does not by itself establish exemption from a locally required building permit or inspection.
- The same official legislative text also states that related exemptions have limits on permit applications or residences constructed within a one-year period, depending on the subsection and circumstances.
“(1) This chapter shall not apply to: [...] (b) Any person who undertakes construction or improvement on his own residence, or who acts as his own general contractor in the performance of construction or improvement on his own residence;”
Mississippi Senate Journal, March 9, 2022 ↗Re-checked Sep 11, 2026
Building code adoptedPartial
The Mississippi Fire Prevention Code and State Fire Marshal enforcement for state-owned or state-agency buildings, public-assembly buildings, and buildings at least 75 feet high, subject to local fire-prevention-code exceptions stated in the statute.
- The State Fire Marshal's Office adopted the 2024 editions of the International Fire Code and International Building Code effective July 1, 2024.
- The Mississippi Fire Prevention Code applies to all buildings owned by the State or State Agencies.
- It applies to all buildings utilized for public assembly except in a county or municipality that has adopted a fire-prevention code with standards not less stringent than the Mississippi Fire Prevention Code.
- It applies to buildings whose construction permits were issued after the statutory effective date and that are not less than 75 feet in height, unless the county or municipality has adopted a fire-prevention code with standards not less stringent than the Mississippi Fire Prevention Code.
International Fire Code edition: 2024 edition · International Building Code edition: 2024 edition · effective date: 2024-07-01 · height threshold: >= 75 feet (Local fire-prevention code exception applies where stated.)
“AS OF JULY 1, 2024, THE STATE OF MISSISSIPPI – OFFICE OF THE STATE FIRE MARSHAL HAS ADOPTED THE 2024 ADDITION”
Fire Code Enforcement ↗Re-checked Oct 1, 2026
2 more reviewed findings on this topic
- Partial — Mississippi counties and municipalities subject to the statewide uniform-building-code framework.
  “Under Senate Bill 2378 of 2014, all counties and municipalities must enact uniform building codes unless they opt out prior to Nov. 30, 2014. Please complete the following information regarding your county or municipality’s building code policies.”
  Mississippi Uniform Building Codes ↗Re-checked Sep 11, 2026
- Partial — Mississippi counties and municipalities, including residential building-code adoption subject to the statewide uniform-building-code framework.
  “Under Senate Bill 2378 of 2014, all counties and municipalities must enact uniform building codes unless they opt out prior to Nov. 30, 2014.”
  Mississippi Uniform Building Codes ↗Re-checked Oct 1, 2026
InspectionsLimited
Pediatric skilled nursing facilities regulated by the Mississippi State Department of Health.
- Upon completion of construction, the Licensing Agency must inspect and approve the facility before occupancy.
- The state and county health departments may access the job site during regular business hours and conduct construction progress inspections as deemed necessary by the agency.
“Upon completion of construction, an inspection shall be made by the Licensing Agency and approval given prior to occupying the building or any part thereof. The state and county health departments shall have access to the job site during regular business hours and shall conduct construction progress inspections as deemed necessary by the agency.”
Mississippi Administrative Code, facility construction and occupancy rules ↗Re-checked Sep 11, 2026
Certificate of occupancyLimited
Pediatric skilled nursing facilities regulated by the Mississippi State Department of Health at final inspection and close-out.
- At final inspection, the State Agency must receive a Certificate of Occupancy or statement of approval from the local building official permitting occupancy for the facility's intended use.
- If there is no local building authority, approval from the local fire authority having jurisdiction must be provided.
- If the facility is state-owned and subject to the State Bureau of Buildings, Grounds and Real Estate Management, approval of occupancy must be coordinated between the state agencies involved.
“A copy of the Certificate of Occupancy or statement of approval from the local building official permitting occupancy of the facility for its intended use. In the absence of a local building authority, approval of a local fire authority having jurisdiction shall be provided. If the facility is owned by the State of Mississippi and subject to the State Bureau of Buildings Grounds and Real Estate Management, approval of occupancy shall be coordinated between the state agencies involved;”
Mississippi Administrative Code, facility construction and occupancy rules ↗Re-checked Sep 11, 2026
Camping on your landLimited
Hunting camps and temporary use involving trailers, cabins, or RVs in Simpson County where MSDH wastewater jurisdiction applies.
- A hunting camp requires a residential application.
- Three or more trailers, cabins, or RVs on the property require a commercial-development application.
- This is a wastewater-application classification and does not establish a county land-use authorization.
“Yes. This is considered a residential application with us. If there will be three (3) or more trailers/cabins/RVs on the property, this will need to be applied for as a commercial development.”
WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
Manufactured homesLimited
Occupation of Factory-Built homes, including manufactured homes, sited anywhere in Mississippi and installed on or after July 1, 2009.
- The home must undergo inspection under the Mississippi Inspection Program before occupation.
- The inspection is conducted by an inspector assigned by the State Fire Marshal’s Office to verify compliance with the manufacturer’s published installation instructions and Mississippi Installation Standards.
- The retailer/developer and/or installer/transporter must submit a Property Locator/Certificate of Installation Form certifying compliant installation.
- For new or used residential homes involving a retailer, the form and required photographs must be submitted within three business days after installation and before porches, decks, or skirting are installed.
- For secondary sitings without a retailer, the installer/transporter must submit the form and required photographs within three business days after installation and before porches, decks, or skirting are installed.
- All necessary state-law or local-authority-having-jurisdiction permits must be obtained before installation.
- Inspection fees are paid by the installer/transporter, developer, or retailer, not the purchaser; failure to pay an invoice within 45 days is a regulatory violation.
- Factory-Built homes designated and properly certified not to be used for human habitation, such as hunting/fishing camps or storage, are excepted from the human-habitation installation requirements.
installation inspection applicability date: 2009-07-01 · current regulation effective date: 2026-07-01 · certificate submission deadline: <= 3 business days after installation (Must also be before installation of porches, decks, or skirting; secondary sitings without a retailer follow the installer/transporter rule.) · inspection scheduling window: 7 to 10 business days after receipt of Property Locator/Certificate of Installation (May be adjusted for Division resource and manpower shortages.) · inspection invoice payment deadline: <= 45 days from invoice date (Nonpayment is a violation and numerous unpaid invoices may delay or deny license issuance.)
“Beginning July 1, 2009, every Factory-Built home that is sited within the State of Mississippi shall be subject to inspection under the MS Inspection Program prior to occupation.”
MH-5 Uniform Standards Code for Factory-Built Homes Law ↗Re-checked Oct 5, 2026
Who permits septicState
On-site wastewater permitting and related services for Simpson County properties.
- The Mississippi State Department of Health Division of On-site Wastewater administers the state program.
- Public sewer connections do not require MSDH to inspect anything.
“State law requires you have permanent sewage disposal solution available to receive a permanent water meter. Permanent sewage disposal solutions can be a sewer line or septic system. You must have a sewer option before a water utility can make a connection to your property.”
WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
2 more reviewed findings on this topic
- State — On-site wastewater systems and related inspections in Simpson County; Simpson is listed in MSDH’s Central Region.
  “The On-site Wastewater program develops policy and regulations and provides technical assistance to regional environmentalists”
  On-Site Wastewater ↗Re-checked Sep 26, 2026
- Mixed — Statewide individual onsite wastewater disposal systems; the Mississippi State Department of Health establishes the rules and the appropriate county Department of Health performs local inspections.
  “Notify the Department at least 48 hours before beginning construction if acting as the Certified Installer of an Individual On-site Wastewater Disposal System and, at that time, schedule a time for inspection of the system with the appropriate county Department of Health.”
  Mississippi State Department of Health Current Regulations: On-site Wastewater ↗Re-checked Sep 11, 2026
Septic permitRequired
New individual on-site wastewater systems serving property in Simpson County.
- An MSDH Environmentalist evaluates the property and emails a Permit/Recommendation listing wastewater treatment and disposal options that can work on the property.
- A certified installer must contact MSDH before installing the system.
- After installation, the Environmentalist visits and approves the system if properly installed.
- A Final Approval is emailed after the required affidavits are provided.
“The Permit is required for [...] the installation of an on-site wastewater disposal system.”
On-site Wastewater Application Process ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — New or replacement on-site wastewater systems serving Simpson County properties where public sewer is unavailable.
  “State law requires you have permanent sewage disposal solution available to receive a permanent water meter. Permanent sewage disposal solutions can be a sewer line or septic system. You must have a sewer option before a water utility can make a connection to your property.”
  WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
Septic inspectionLimited
Septic inspections in Simpson County, including real-estate transactions.
- The State does not require inspection as part of a real-estate transaction.
- MSDH recommends inspection.
- A county, city, realtor, utility, lender, buyer, or seller could request inspection.
- Sewer connections do not require MSDH inspection.
“The State does not require the septic be inspected as part of a real estate transaction. However, MSDH recommends this inspection. Advanced Treatment Systems will also require a certified manufacturer’s representative (i.e. an Installer) to inspect the tank itself as part of this inspection. The county, city, realtor, utilities, loan provider, buyer or seller could request the inspection from us.”
WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
One more reviewed finding on this topic
- Required — New individual on-site wastewater systems in Simpson County.
  “The Environmentalist will then visit your property on that day and approve of the system if it is installed properly.”
  On-site Wastewater Application Process ↗Re-checked Sep 26, 2026
Off-grid sanitationLimited
Alternative or off-grid wastewater disposal in Simpson County.
- Mississippi does not recognize gray water as a separate disposal category.
- Wastewater must be piped into a central sewer system or septic system for proper disposal.
- Wastewater may not be discharged onto the ground, into ditches, or into bodies of water.
- A local authority may allow temporary port-a-potty use, but MSDH does not have jurisdiction over that option.
“Mississippi does not recognize gray water. Anything that could be considered gray water in other states is classified as wastewater in Mississippi. All wastewater is required to pipe into a central sewer system or a septic system for proper disposal. No “gray water” can be discharged on the ground, ditches, or bodies of water.”
WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
One more reviewed finding on this topic
- Prohibited — Disposal of household wastewater or gray water on the ground, in ditches, or in bodies of water in Simpson County.
  “No “gray water” can be discharged on the ground”
  WasteWater Frequently Asked Questions ↗Re-checked Sep 26, 2026
Well permitLimited
Groundwater-withdrawal wells in Simpson County and elsewhere in Mississippi.
- All groundwater withdrawals must satisfy Rule 1.2 permitting requirements unless an exemption in Rule 1.4(A) applies.
- The exemptions include wells used for domestic purposes that provide potable water to only one household; wells with a surface casing diameter less than six inches, except for prohibited uses under Rule 1.4.D and reporting requirements under Rule 1.4.E; and relief wells installed to protect the integrity of a structure, such as a dam or levee.
- An exemption does not relieve the owner of other applicable state or federal requirements.
- Wells of any size that are part of a Public Water System must comply with Mississippi State Department of Health regulations.
- Effective 7/1/2026, MDEQ states that there are no permit fees associated with groundwater or surface-water withdrawal permits.
surface casing diameter threshold: < 6 inches (Wells below this threshold are exempt except for Rule 1.4.D prohibited-use and Rule 1.4.E reporting requirements.) · groundwater withdrawal permit fee: 0 USD (MDEQ states this is effective 7/1/2026.)
“groundwater withdrawals must meet the permitting requirements set forth in Rule 1.2”
Title 11, Mississippi Administrative Code, Part 7, Chapter 1: Surface Water and Groundwater Use and Protection Regulations ↗Re-checked Sep 30, 2026
2 more reviewed findings on this topic
- Not required — The following groundwater-withdrawal wells in Simpson County: single-household domestic potable-water wells; wells with a surface casing diameter less than six inches; and qualifying relief wells.
  “Wells used for domestic purposes and providing potable water to only one (1) household”
  Title 11, Mississippi Administrative Code, Part 7, Chapter 1: Surface Water and Groundwater Use and Protection Regulations ↗Re-checked Sep 30, 2026
- Limited — Groundwater withdrawal permits for water wells in Mississippi.
  “State law requires that you obtain a groundwater withdrawal permit for water wells with surface casing diameters 6-inches or greater in diameter. Some exclusions apply to this requirement.”
  Guidelines for Securing the Services of a Water Well Driller ↗Re-checked Sep 11, 2026
Mandatory utility hookupConditional
Public water connections and connection to centralized wastewater treatment systems for residences, buildings, and facilities in Mississippi.
- A public water utility may not connect water service without prior written Department approval certifying that the sewage treatment and disposal plan complies with state law.
- Water utility connections may be made during construction only if the Department approved the sewage plan and the owner agreed to inspection and approval before use or occupancy.
- Where centralized wastewater treatment is constructed and becomes available, onsite systems must be abandoned and residences, buildings, or facilities connected to the centralized system.
- Temporary onsite systems may be used only under the stated 36-month centralized-treatment conditions.
centralized wastewater availability deadline: 36 months (The developer must sign a written agreement to connect when available and install internal sewage collection to the connection point.)
“Where a Centralized Wastewater Treatment System is available, all places shall have a properly constructed connection to the centralized wastewater treatment system which all human excreta and other liquid waste shall be disposed”
Mississippi State Department of Health Current Regulations: On-site Wastewater ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Conditional — Permanent water-meter connections for Simpson County properties.
  “State law requires you have permanent sewage disposal solution available to receive a permanent water meter. Permanent sewage disposal solutions can be a sewer line or septic system. You must have a sewer option before a water utility can make a connection to your property. If public sewer is not available in your area, you will have to apply to us for the proper paperwork.”
  WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
Subdividing landRegulated (with conditions)
Mississippi State Department of Health review of subdivision land divisions for onsite-wastewater suitability; this does not establish that MSDH approves the general land-use plat or replaces county or municipal plat review.
- A subdivision is defined for this review as land divided into ten (10) or more lots, tracts, sites, or parcels for residential development.
- Local or county ordinances may reduce the ten-lot threshold.
- If public water will be used, the Bureau of Public Water Supply may require subdivision review regardless of lot count.
- Developments of 35 or more lots and additional phases by the same owner require a feasibility study; developments under 35 lots may be required to obtain one case-by-case.
- No lots may be sold or construction started before evaluation.
- The subdivision plan-review fee is $325 plus $6.50 per lot; online payment is subject to a processing fee and fees may change.
- The plan review is voided if the developer alters the plat without notifying MSDH; MSDH determines whether a new review is required.
- MSDH reviews lots for general suitability of onsite wastewater treatment and disposal for one residence per lot; septic, soil, wetland, water-supply, and other health requirements remain applicable.
residential subdivision threshold: >= 10 lots (Local ordinances may reduce the minimum below ten lots.) · feasibility-study threshold: >= 35 lots (Additional phases by the same owner also require a feasibility study; smaller developments may be required case-by-case.) · subdivision plan-review fee: 325 USD (Plus $6.50 per lot; online payment processing fee and possible additional costs may apply.)
“All lots are reviewed for general suitability of on-site wastewater treatment and disposal for a single residence per lot.”
Subdivision Plan Review ↗Re-checked Oct 5, 2026
One more reviewed finding on this topic
- Regulated (with conditions) — Subdivision and commercial-development wastewater review applicable to Simpson County.
  “A subdivision is any development of land into ten (10) or more lots. County ordinances may lower the minimum number of lots. If the development will utilize public water, the Bureau of Public Water Supply may require a subdivision review, regardless of lot count.”
  WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
Driveway accessRequired
Driveways and specified changes of use connecting to Mississippi state highways.
- A permit is required for new driveways.
- A permit is required for alterations to existing drives.
- A permit is required for a change of use causing a daily-trip increase of 10% or 100 daily trips, whichever is greater.
- A permit is required for property-use changes from non-commercial to commercial.
- If access is expected to exceed 100 peak-hour trips, a traffic-impact study must be submitted.
- If the permitted land use changes, the original permit is revoked and a new permit must be applied for.
- A denied permit may be appealed within 10 days after receipt of the denial notification.
daily trip increase threshold: 10 percent (or 100 daily trips, whichever is greater) · traffic impact study threshold: > 100 peak-hour trips · appeal deadline: 10 days (after receipt of denial notification)
“For State Highways a permit is required for: 1. New driveways; 2. Alterations to existing drives;”
Mississippi Access Management Guide ↗Re-checked Sep 11, 2026
Building in a floodplainRequired
Development or improvement activity on state-owned Mississippi property or buildings located in FEMA Special Flood Hazard Area zones A, AE, V, or VE.
- The requirement applies to state-owned property or buildings.
- For existing structures determined to involve less than a Substantial Improvement, no additional forms or approval are required after Step One.
- For new development or a Substantial Improvement, the applicant must complete the Step Two form, obtain a Control Code, provide all required attachments, and submit final elevation certification and complete drawings and specifications.
- Approval produces an initial approval letter and, after final requirements are approved, a final approval letter.
- If Step Two is not approved and the project cannot be brought into compliance, a denial letter is issued.
covered FEMA zones: A, AE, V, VE · substantial improvement threshold: less than a Substantial Improvement (no additional forms or approval required for the development project)
“A development or improvement activity to state-owned property or building, [...] must complete a Floodplain Management Permit Application.”
Mississippi Administrative Code — State Property Floodplain Regulations ↗Re-checked Sep 11, 2026
Permit feesPublished (with conditions)
Mississippi Department of Transportation over-dimensional and related permits statewide.
- The published schedule applies to MDOT permit types, not a general statewide building-permit fee schedule.
- Blanket permits are not prorated and are issued for one year unless otherwise specified.
- Blanket permits must have valid insurance or a valid U.S. DOT number; if insurance expires or cancels, the blanket permit becomes invalid.
- Overweight charges apply to weight exceeding 80,000 pounds or specified axle limits.
oversize permit fee: 10 USD · oversize blanket fee: 100 USD · 72-hour legal trip permit fee: 25 USD · harvest permit fee: 25 USD · port permit fee: 170 USD per year · pole blanket fee: 200 USD
“Oversize permit $10.00 Oversize Blanket $100.00”
Mississippi Department of Transportation Permit and Blanket Fees ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Published (with conditions) — MSDH on-site wastewater applications used for Simpson County properties.
  “Notice of Intent + Final Approval is currently $197.50 Notice of Intent + Exemption is currently $100 Existing Residential Inspection is currently $100 Private Water Well Sample is currently $10 Non-residential Water Meter is currently $0 Commercial Establishment + Final Approval is currently $412.50 Existing Commercial Establishment is currently $315 Commercial Development is currently $412.50 + $2.60/unit. A unit can be an apartment, house, trailer, RV or any other independent quarters for a single family. Subdivision is currently $325 + $6.50/lot Online payment will be subject to a processing fee. All fees are subject to change. Additional costs may be included if online application is not used. See other FAQ questions for details about application types.”
  WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
Permit processPartial
MSDH on-site wastewater permit process for Simpson County properties.
- Applicants submit a complete application and required documents.
- MSDH reviews the application before invoicing.
- Payment must be received before the property visit.
- The process may include soil-and-site evaluation, permit/recommendation, installation inspection, and final approval.
“We personally review all applications before invoicing. This prevents many mistakes, such as duplicate applications or applying for the wrong service to occur. The invoice is emailed to you from support@msegov.com within one (1) business day of receiving the application. Check your Spam folder if you do not see anything in your Inbox. We must receive your payment prior to visiting the property.”
WasteWater FAQs and Answers ↗Re-checked Oct 4, 2026
One more reviewed finding on this topic
- Partial — Mississippi local permitting for businesses and business-related construction or land development.
  “You may be required to apply for permits and licenses from your local government (e.g., city or county). Different locations have different requirements.”
  Start Your Business in Mississippi — County and City Permits ↗Re-checked Sep 11, 2026
Campground & park staysLimited
Recreational-vehicle occupancy at campgrounds under the jurisdiction of the Pearl River Valley Water Supply District, including Coal Bluff, Goshen Springs, Leake County Water Park, Low Head Dam, and Timberlake.
- The rules apply within all campgrounds under the District’s jurisdiction.
- Campgrounds are not intended to be permanent domiciles for campground guests.
- A recreational vehicle must be in operable road-worthy condition, properly registered and insured in its domicile state or province, with a current license plate affixed.
- Campers may not stay on any pad longer than 12 consecutive months; Standard Plus campers may move to another available pad after 12 months, but the District is not responsible for making a pad available.
- Campsites are typically designed for trailers or recreational vehicles no longer than 32 feet or wider than 8 feet, subject to the stated RVIA-seal, holding-tank, facility-capacity, and prohibited-unit conditions.
- Primitive camping areas without water, electricity, or sewer are not intended for recreational vehicles.
- No permanent structures may be erected on a campsite; temporary accessibility stairs, stoops, steps, or ramps require the stated approvals and size limits.
- Camping is confined to designated campground or overflow areas, and no more than one camping unit is allowed per pad without Campground Manager approval.
maximum stay on one pad: <= 12 consecutive months (Campers may move to a different available pad after 12 months.) · typical campsite RV length: <= 32 feet (Larger units may be accepted if they satisfy the stated RVIA seal, holding-tank, and facility-capacity conditions.) · typical campsite RV width: <= 8 feet (Larger units may be accepted if they satisfy the stated RVIA seal, holding-tank, and facility-capacity conditions.)
“Campers shall not stay on any pad longer than 12 consecutive months”
General Campground Rules and Policies - Ross Barnett Reservoir ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Limited — Temporary camping at designated campgrounds under the jurisdiction of the Pearl River Valley Water Supply District.
  “Camping shall be confined to the designated campground or designated overflow areas.”
  General Campground Rules and Policies - Ross Barnett Reservoir ↗Re-checked Sep 11, 2026
county building authorityGeneral
Mississippi county boards of supervisors' authority and obligation to adopt uniform building codes, including in unincorporated county territory, subject to the statutory opt-out framework.
- All counties and municipalities must enact uniform building codes unless they opted out before November 30, 2014.
- A county board of supervisors adopting building codes after July 1, 2008 must adopt as minimum codes codes established and promulgated by the Mississippi Building Codes Council.
- The statewide source does not identify current county-by-county residential permit enforcement or opt-out status.
opt-out deadline: 2014-11-30 · minimum-code requirement for codes adopted after: >= 2008-07-01
“Under Senate Bill 2378 of 2014, all counties and municipalities must enact uniform building codes unless they opt out prior to Nov. 30, 2014.”
Mississippi Uniform Building Codes ↗Re-checked Oct 1, 2026

Inside cities and towns in Simpson County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Minimum dwelling sizeDistrict specific (with conditions)
Multiple-family uses in the City of Magee's High Density Residential District (R-3), including duplexes, apartments, and condominiums.
- Section 803 applies to all multiple-family uses.
- The R-3 district is for higher-density multiple-family residential uses, meaning two or more residential uses.
- One-bedroom units must have at least 500 square feet of floor area.
- Two-bedroom units must have at least 700 square feet of floor area.
- Units with three or more bedrooms must have at least 900 square feet of floor area.
- The R-3 district requires a minimum lot area of two acres, maximum density of 10 dwelling units per gross acre, and minimum lot width of 100 feet.
- Maximum building height is 35 feet unless greater height is specifically approved by the Mayor and Board of Aldermen at site-plan approval.
- Front yard must be 40 feet from the right-of-way line and remain landscaped, with no encroachments except entrance/exit driveways.
- Side and rear yards must be 25 feet, except where a side or rear lot line abuts an R-1 district, in which case the yard must be 50 feet from the building to the lot line.
- A minimum 30 percent of the gross site area for a condominium or apartment complex must be devoted to open space.
- Apartment or condominium complexes must submit a site plan to the Planning/Zoning Commission.
- Proposed apartment or condominium complexes must provide at least two separate ingress/egress points.
minimum floor area, one-bedroom unit: >= 500 square feet · minimum floor area, two-bedroom unit: >= 700 square feet · minimum floor area, three-or-more-bedroom unit: >= 900 square feet
“SECTION 803 – DIMENSIONAL REQUIREMENTS FOR ALL MULTIPLE FAMILY USES 803.01 Maximum Height: 35 feet unless greater height is specifically approved by the Mayor and Board of Aldermen at the time the site plan is approved. 803.02 Minimum Lot Area: Two (2) acres. 803.03 Minimum Floor Area: A. One bedroom units: 500 square feet. B. Two bedroom units: 700 square feet. C. Three or more bedroom units: 900 square feet.”
Zoning Regulations City of Magee, Mississippi ↗Re-checked Oct 7, 2026
One more reviewed finding on this topic
- District specific (with conditions) — Single-family detached dwellings in the City of Magee's Residential Estate District (RE).
  “SECTION 903 – DIMENSIONAL REQUIREMENTS 903.01 Maximum Building Height: 35 feet 903.02 Minimum Lot Area: One acre 903.03 Minimum Floor Area: 2,200 square feet 903.04 Minimum Lot Width: 150 feet 903.05 Minimum Yards: A. Front Yard: 50 feet. B. Side Yards: 25 feet, except where Section 901 (D) requires a minimum yard of 50 feet from any adjoining property line. C. Rear Yard: 50 feet.”
  Zoning Regulations City of Magee, Mississippi ↗Re-checked Oct 7, 2026
Minimum lot sizeDistrict specific (with conditions)
Minimum lot-area requirements in City of Magee zoning districts, including A-1, R-1, R-2, RE, and RM.
- Requirements vary by zoning district and available sewer service.
- A-1 requires three acres without City sewer and one acre with City sewer.
- R-1 requires 11,200 square feet; R-2 requirements differ by dwelling type; RE requires one acre; RM requires a 10-acre park and 5,000-square-foot spaces.
A-1 lot area without City sewer: 3 acres · A-1 lot area with City sewer: 1 acre · R-1 minimum lot area: 11200 square feet · RE minimum lot area: 1 acre · RM minimum park size: 10 acres · RM minimum manufactured-home space area: 5000 square feet
“503.02 Minimum Lot Area: A. For lots where City of Magee sanitary sewerage service is NOT available: three (3) acres. B. For lots where City of Magee sanitary sewerage service IS available: one (1) acre. However, if livestock are to be kept on the property, see Section 501 (C).”
City of Magee zoning dimensional requirements ↗Re-checked Oct 4, 2026
SetbacksDistrict specific (with conditions)
Building setbacks in City of Magee zoning districts, including A-1 and R-1.
- Setbacks vary by zoning district.
- A-1 side and rear yards have a 150-foot exception when Section 501(C) or (D) requires that distance for livestock or fowl.
- R-1 side yards may require a larger yard to meet Section 405 buffer-yard standards.
A-1 front yard: 40 feet · A-1 side and rear yards: 25 feet (150 feet where Section 501(C) or (D) applies) · R-1 front yard: 30 feet · R-1 side yard: 8 feet (larger yard where Section 405 buffer-yard standards apply) · R-1 rear yard: 25 feet
“603.03 Minimum Lot Width: 90 feet. 603.04 Minimum Yards: A. Front yard: 30 feet. B. Side yards: 8 feet, except where a larger yard is required to meet buffer yard standards as set forth in Section 405. C. Rear yard: 25 feet.”
City of Magee zoning dimensional requirements ↗Re-checked Oct 4, 2026
Tiny homesAllowed (with conditions)
Prefab single-family homes fitting the ICC definition of tiny homes and ADUs within the City of Magee.
- The ordinance treats qualifying prefab tiny homes and ADUs as single-family dwellings.
- The structure remains subject to the applicable City of Magee zoning district, building, and other code requirements.
- The definition excludes mobile or manufactured homes from the single-family-dwelling category.
“Dwelling, Single Family: A detached residential building designed for occupancy by one family, including prefab homes that fit the ICC definition of tiny homes and ADUs. For the purpose of this ordinance, single-family dwelling does not refer to mobile or manufactured homes.”
City of Magee dwelling definition ↗Re-checked Oct 4, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

County-wide zoning — Countywide zoning authority in Simpson County, including unincorporated areas.
Local zoning — Aggregate local zoning across Simpson County municipalities and unincorporated areas.
Zoning districts — Published zoning districts in Simpson County.
Lot coverage — Lot coverage in Simpson County.
Building height — Building-height limits in Simpson County.

4 more unanswered

Living in an RV
Accessory dwellings
Agricultural exemption
Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Simpson County, Mississippi

Is Simpson County a good place to live off-grid or homestead?

Simpson County scores 66/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and strong self-sufficiency basics: 58.8″/yr rainfall plus 76.1% wooded land. Watch-outs: a weaker property-autonomy legal backdrop.

Do you need a building permit in Simpson County, Mississippi?

Simpson County generally requires a residential building permit. Onsite septic is permitted by Mississippi State Department of Health (On-Site Wastewater program). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Simpson County, Mississippi?

Land in Simpson County runs about $3,201 per acre, based on the latest county data.

What is the water situation in Simpson County?

Simpson County gets about 58.8" of rain a year, with severe drought in roughly 4.5% of years.

How remote is Simpson County?

A representative private-land location has about 40,360 people within a 30-minute drive and 1,429,147 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and land rules in Simpson County, Mississippi

At a glance

Who to call

Do you need a building permit in Simpson County, Mississippi?

Who handles Simpson County building permits, and how do you reach the office?

Does Simpson County have zoning?

How do septic permits work in Simpson County?

Can you live in an RV or tiny home on your land in Simpson County?

Building a home in Simpson County: the steps, in order

What should you check before buying land in Simpson County?

Watch-outs

Sources

Compared with neighboring counties

Simpson County in Mississippi

How Simpson County scores

Find land. Bring the promising ones back.

Parcel due diligence

Cities and towns in Simpson County

Answers from the rulebook for Simpson County

Simpson County rules

Mississippi rules that apply here

Inside cities and towns in Simpson County

Still unanswered

Living off-grid in Simpson County, Mississippi

Is Simpson County a good place to live off-grid or homestead?

Do you need a building permit in Simpson County, Mississippi?

How much does land cost in Simpson County, Mississippi?

What is the water situation in Simpson County?

How remote is Simpson County?

How Simpson compares in Mississippi