Bolthole Index

Florence County, South Carolina

Building permits, zoning and septic in the Town of Timmonsville, SC

The Town of Timmonsville, South Carolina, in Florence County requires a building permit before erecting a building, structure or addition.1 Timmonsville has town zoning with a joint town/county board of zoning appeals; ask Town Hall to identify the current building and zoning application offices.23 Septic approval comes from SCDES, and Timmonsville bars septic tanks where sewer lines are available.45

At a glance

Building permits
Required before erecting buildings, structures or additions1
Zoning
Town zoning; joint town/county board of zoning appeals2
Septic permits
SCDES approval; septic barred where sewer lines are available45
Mobile-home subdivision lots
Minimum 5,000 square feet; residential zoning districts only67
Owner-builder
State exemption for qualifying owner/family occupancy, with supervision and recorded notice8
Private wells
State Notice of Intent required before construction; local restrictions still apply9
RV and tiny-home living
We could not confirm town occupancy rules; ask Town Hall before buying3

Who to call

Building permits

Timmonsville Town Hall

Contact to identify the current town building-permit and zoning officials and request application instructions; issuance authority was not confirmed.

(843)346-7942

[email protected]

115 W. Main Street Timmonsville, SC 29161

Septic permits

SCDES Florence Environmental Affairs Office

Regional SCDES contact serving Florence County for septic and environmental questions.

(843) 661-4825

Florence County Health Dept. 145 E. Cheves Street Florence, SC 29506

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 Town of Timmonsville means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in the Town of Timmonsville, SC?

Timmonsville requires a building permit before any building, structure or addition is erected, and the permit must follow the statewide technical codes established by the South Carolina Building Codes Council.1 South Carolina’s mandatory building codes apply inside Timmonsville; local jurisdictions control their administrative procedures.10

Start with Timmonsville Town Hall to request the current application route and identify the official responsible for your project.3 We could not confirm Timmonsville’s ordinary building-permit application checklist, inspection schedule, general certificate-of-occupancy requirements or local building-permit fees; ask Town Hall for those details before setting a construction date.3

Does the Town of Timmonsville have zoning and minimum lot sizes?

Timmonsville has zoning ordinances and a joint town/county board of zoning appeals, but the available town provisions do not identify a complete district schedule or zoning map.27 Ask Town Hall to identify the zoning administrator and obtain the parcel’s district, permitted uses and applicable setbacks before choosing a building layout.3

Timmonsville mobile-home subdivisions must be in residential zoning districts, and their minimum lot size is 5,000 square feet.76 That minimum is specific to mobile-home subdivisions; it does not establish a minimum lot size for every Timmonsville house lot.6 Mobile-home subdivision applications go to the zoning administrator, with planning commission review.11

How do septic permits work inside the Town of Timmonsville?

Timmonsville allows approved septic tanks where sewer lines are not provided, but prohibits approval where sewer lines are available.5 For a home or manufactured home without public or community sewer service, SCDES approval and a septic installation permit are required.4 Confirm sewer availability before planning an off-grid sanitation system; town sanitation restrictions and state septic approval both matter.512

The SCDES Florence Environmental Affairs Office serves Florence County and can be reached at (843) 661-4825.13 SCDES evaluates a new home’s septic site before issuing a construction permit, and the installer must arrange inspection before covering the new system.14 State septic construction permits last 5 years; renewal or approved changes require a new application and fee.15

Can you live in an RV or tiny home in the Town of Timmonsville?

We could not confirm Timmonsville’s rules for living in an RV on private land, temporary camping, tiny-home occupancy or accessory dwelling units; ask Town Hall to identify the zoning official who can answer for your parcel.3 Ask specifically about occupancy during construction, the proposed dwelling type and whether a separate dwelling is allowed.3

Timmonsville’s mobile-home subdivision rules establish a residential-district restriction and a subdivision lot minimum, but do not answer RV or tiny-home occupancy on an individual lot.76 A sanitation plan also needs a separate answer: Timmonsville bars septic tanks where sewer lines are available, regardless of the hoped-for dwelling arrangement.5

How do you start building a home in the Town of Timmonsville?

  1. Contact Town Hall to identify the town building-permit official and zoning administrator, and request the parcel’s zoning requirements and application instructions.3
  2. Confirm sewer availability; where public or community sewer does not serve the property, obtain SCDES approval and a septic installation permit.45
  3. Obtain the required building permit before erecting the home or an addition, following South Carolina’s mandatory codes.110
  4. Ask Town Hall for the building inspection and occupancy requirements before scheduling work, and arrange the state septic inspection before the installer covers a new system.314

An owner acting as builder must qualify under South Carolina’s owner/family-occupancy exemption, personally supervise construction, sign the building-permit application and record the required public notice; the exemption still requires compliance with building codes and zoning.8

What should you check before buying land in the Town of Timmonsville?

For a proposed private residential well in Timmonsville, South Carolina requires a Notice of Intent before construction; state well coverage does not authorize a well prohibited by a local ordinance or another law.9 Ask Town Hall about any town restrictions and SCDES about state well coverage before treating a well as your water supply.39

For land outside town limits, use the Florence County guide for the county building-permit answer: Florence County requires building permits within its jurisdiction.16 Countywide soil ratings are context rather than a parcel approval: Florence County has 17.1% of soils rated not limited for conventional septic drain fields, so a site evaluation remains necessary and an engineered system may be needed.17 Ask Town Hall to identify the floodplain contact and confirm legal access for the proposed homesite before committing to a purchase.3

Watch-outs

  • Timmonsville’s septic prohibition where sewer lines are available can rule out a planned septic system even before a soil evaluation.5
  • South Carolina’s updated mandatory building codes take effect January 1, 2027; ask the town building official which edition governs a project spanning that date.18
  • South Carolina’s farm-structure code exemption excludes residences and attached structures, requires an affidavit before construction, and preserves local authority to require building permits.19
  • Selling or renting an owner-built home within 2 years after completion creates a statutory presumption that the home was built for sale or rent, unless otherwise approved by the commission.8

Sources

  1. Timmonsville Code, Sec. 6-22 — Building permits (Town of Timmonsville), quoted and re-checked
  2. Timmonsville Code, Sec. 2-247 — Joint board of zoning appeals (Town of Timmonsville), quoted and re-checked
  3. Timmonsville Town Hall (timmonsvillesc.org)
  4. Timmonsville Code, Sec. 16-149 — Use of septic tanks (Town of Timmonsville), quoted and re-checked
  5. Timmonsville Code, Sec. 16-149 — Use of septic tanks (Town of Timmonsville), quoted and re-checked
  6. Timmonsville Code, Sec. 6-95 — Mobile home subdivisions (Town of Timmonsville), quoted and re-checked
  7. Timmonsville Code, Sec. 2-247 — Joint board of zoning appeals (Town of Timmonsville), quoted and re-checked
  8. South Carolina Code Title 40, Chapter 59 — Residential Home Builders (South Carolina statewide rule), quoted and re-checked
  9. Private Drinking Water Wells (South Carolina statewide rule), quoted and re-checked
  10. Building Codes in Effect for South Carolina (Town of Timmonsville), quoted and re-checked
  11. Timmonsville Code, Sec. 6-95 — Mobile home subdivisions (Town of Timmonsville), quoted and re-checked
  12. Professional Soil Classifiers - Sewer Accessibility Verification (South Carolina statewide rule), quoted and re-checked
  13. SCDES Florence Environmental Affairs Office (des.sc.gov)
  14. Septic Tanks - Frequently Asked Questions (South Carolina statewide rule), quoted and re-checked
  15. Septic Tanks - Residential, Single Home Builder (South Carolina statewide rule), quoted and re-checked
  16. Florence County SC - Inspections (2026 county census)
  17. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  18. 2024 Building Code Modification Index (South Carolina statewide rule), quoted and re-checked
  19. South Carolina Code of Laws, Section 6-9-65 (South Carolina statewide rule), quoted and re-checked

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.

Answers from the rulebook for Town of Timmonsville

Town of Timmonsville’s own rules

  • Building permitRequired

    Any building, structure, or addition erected inside Timmonsville town limits.

    • The permit must comply with the statewide technical codes established by the South Carolina Building Codes Council.
    “No building or structure nor any additions thereto shall be erected unless a permit has been issued in accordance with the provisions of the technical codes, applicable statewide, as established by the state building codes council.”
  • Local zoningPresent (with conditions)

    Land inside Timmonsville town limits; town zoning is administered through the town/county joint board of zoning appeals framework.

    • The cited section refers to zoning ordinances adopted by both the town and county; it does not identify the individual zoning districts.
    “there is established a joint board of zoning appeals, which shall perform all functions prescribed by the Act in the area of jurisdiction of the town and county under the existing and all future zoning ordinances adopted by both the town and the county.”
  • Zoning districtsPartial

    Zoning districts and zoning-dependent uses inside Timmonsville town limits.

    • The code expressly references residential zoning districts, mobile-home districts, zoning administrators, and zoning ordinances adopted by both town and county.
    • The opened excerpts do not publish the complete district map or district schedule.
    “Mobile home subdivisions shall be located only in the residential zoning districts.”
  • Minimum lot sizeSpecified

    Mobile-home subdivisions inside Timmonsville town limits.

    • The cited minimum applies specifically to mobile-home subdivisions, not necessarily to every residential zoning district.

    minimum lot size: >= 5000 square feet

    “Minimum lot size for mobile home subdivisions shall be 5,000 square feet.”
  • Off-grid sanitationLimited

    Non-public sewer sanitation inside Timmonsville town limits.

    • DHEC-approved septic tanks may be used where sewer lines are not provided.
    • Septic tanks are barred where sewer lines are available.
    • Pit privies are unlawful where a sewer connection is available.
    “Septic tanks approved by the department of health and environmental control which are kept in good and sanitary condition shall be approved where sewer lines are not provided, but under no condition shall septic tanks be approved where sewer lines are available.”
  • Mandatory utility hookupSewer (with conditions)

    Property inside Timmonsville town limits using septic or pit-privy sanitation.

    • Septic tanks may not be approved where sewer lines are available.
    • A pit privy must be removed and a sewer connection established when a sewer connection becomes available.
    “Where a sewer connection is made available, said privy shall be removed and connection shall be established.”
  • Driveway accessRequired

    Mobile-home subdivisions and parks inside Timmonsville town limits.

    • For subdivisions, each mobile-home stand must connect to a public street by concrete or asphalt driveway.
    • For parks, all mobile-home spaces must abut an all-weather park driveway at least 15 feet wide for one-way drives or 25 feet wide for two-way drives.

    one-way park driveway width: >= 15 feet · two-way park driveway width: >= 25 feet

    “All mobile home spaces shall abut upon an all-weather surface park driveway not less than 15 feet wide for one-way drives and 25 feet wide for two-way drives.”
  • Permit processPartial

    Mobile-home subdivision permit process inside Timmonsville town limits.

    • Planning commission review is required.
    • Application is made to the zoning administrator.
    • The opened material does not establish the complete process for ordinary building permits.
    “The planning commission shall have review authority for all subdivision requests. Application will be made to the zoning administrator.”

Rules another office applies inside Town of Timmonsville

Town of Timmonsville does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Building code adoptedAdopted

    Mandatory South Carolina building codes enforced within Timmonsville town.

    • The state source states that mandatory codes must be enforced by every South Carolina municipality and county.
    • The Building Codes Council adopted the 2021 codes on October 6, 2021, with implementation January 1, 2023.
    • Administrative policies and procedures remain the responsibility of each local jurisdiction.

    implementation date: 2023-01-01

    “The mandatory codes referenced in S.C, Ann. §6-9-50(1976, as amended), modified and adopted by the South Carolina Building Codes Council (Council), must be enforced by every South Carolina municipality and county.”
  • Who permits septicState (with conditions)

    Septic systems inside Timmonsville town limits where sewer lines are not provided.

    • The town code identifies the Department of Health and Environmental Control as the approving authority.
    • Septic tanks are not approved where sewer lines are available.
    “If you are planning to build a home or place a manufactured home on property not served by a public or community sewer system, you must first obtain SCDES's approval and a permit to install a septic system.”
  • Septic permitRequired

    Individual septic systems serving property inside Timmonsville town limits where public water and sewer are unavailable.

    • The Florence County official comprehensive-plan material states that applications for wells and septic systems are submitted to DHEC.
    • DHEC approval must be in writing before a building permit is issued.
    • The town code separately bars septic approval where sewer lines are available.
    “Incorrectly installed septic systems can harm water quality and make people sick, which is why South Carolina law requires site approvals and permits for all septic systems.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Timmonsville or Florence County directly.

  • Owner-builder exemption — Owner-builder exemptions for construction inside Timmonsville town limits.
  • Inspections — Building-code inspections inside Timmonsville town limits.
  • Certificate of occupancy — Certificates of occupancy for construction inside Timmonsville town limits.
  • Minimum dwelling size — Single-family and agricultural/rural residential districts inside Timmonsville town limits.
  • Lot coverage — Residential and agricultural/rural residential districts inside Timmonsville town limits.
10 more unanswered
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Septic inspection
  • Well permit
  • Agricultural exemption
  • Short-term rentals
  • Permit fees

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.

Unanswered questions are usually a sign that Town of Timmonsville publishes no rule on the point, not that none exists. Florence County’s page lists the county offices to call.

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