Bolthole Index

Charleston County, South Carolina

Zoning, building permits and septic rules in Isle of Palms, South Carolina

The City of Isle of Palms, South Carolina runs its own zoning review and issues its own building permits, so Charleston County's permit counter is the wrong office for a lot inside city limits1. Septic permits come from the South Carolina Department of Environmental Services, not the city2. Plan on a city review of 4-6 weeks for a new house3.

At a glance

Building permit
Required from the City of Isle of Palms; review may take 4-6 weeks3
Zoning
City zoning applies, checked together with the building permit1
Septic permits
State (SCDES), not the city or the county building office2
Building permit fee
$60 plus $6 per $1,000 of construction value, with a plan review fee of one-half of that on top4
Flood rules
Current flood zone standards apply to new construction and substantial improvements5
RV living
We could not confirm a city rule; ask the city building department6
Owner-builder
State law has an owner-builder exemption; the city's own rule is unconfirmed7

Who to call

Building permits

City of Isle of Palms Building Department

Building permits, plan review, zoning review and inspections inside Isle of Palms city limits

843-886-9912

1207 Palm Blvd., Isle of Palms, SC 29451

Septic permits

South Carolina Department of Environmental Services (SCDES)

Septic (onsite wastewater) and private well permits statewide, including inside Isle of Palms

(803) 898-3432

[email protected]

2600 Bull St., Columbia, SC 29201

Contact details are copied from each office’s official page and were checked against it on October 23, 2026.

Off-grid gear

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

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Does Isle of Palms have zoning, and what does it mean for lot size and setbacks?

Yes. The City of Isle of Palms has its own zoning, and the city divides its land into 7 zoning districts8. Zoning review happens together with building-permit review, so a plan that breaks the district rules is caught at the permit counter1.

The single-family districts differ, so name the district before you compare lots:

  • SR-1: lots of 17,500 square feet or more, with 30-foot front and rear setbacks and 10-foot side setbacks9. Smaller SR-1 lots get 24-foot front and rear setbacks10. Maximum height is 40 feet11.
  • SR-2: lots of 8,000 square feet or more, with 25-foot front and rear setbacks and 10-foot side setbacks12. Smaller SR-2 lots get 20-foot front and rear setbacks13. Maximum height is 40 feet14.
  • SR-3: 10,000 square feet of contiguous highland, with a 20-foot front setback, 10-foot side setbacks and a 30-foot rear setback15. Double frontage lots are prohibited, and maximum height is 40 feet16.

We could not confirm the city's rules on lot coverage, minimum dwelling size, accessory dwellings or tiny homes. Ask the Isle of Palms Building Department before you count on any of them6.

Do you need a building permit in Isle of Palms, and who issues it?

Yes. Inside Isle of Palms, the city's own building department handles building permits, plan review and inspections, and Charleston County's permit office does not1. The county's rules cover unincorporated Charleston County only, because its zoning ordinance applies only to unincorporated properties17.

The city's building permit fee is $60 plus $6 per $1,000 of construction value, and any project that needs plan review pays a plan submittal and review fee of one-half of the building permit fee on top4. Demolishing a structure needs a permit costing $50, and moving a structure needs a permit costing $10018.

The city has adopted the 2021 South Carolina building, residential, fire, plumbing, mechanical and fuel gas codes with state modifications19. South Carolina's Building Codes Council adopted newer 2024 editions that local jurisdictions begin enforcing on January 1, 202720.

Contact the City of Isle of Palms Building Department at 843-886-99126.

How do septic permits work inside Isle of Palms?

Septic permits for a new house on a septic tank come from the South Carolina Department of Environmental Services (SCDES), not from the City of Isle of Palms2. The city says the septic permit may be submitted during its own review, which saves time21.

State law bars an onsite wastewater permit wherever public sewer is accessible, so confirm sewer availability for the lot before you plan a septic system22. Charleston County's septic soil rating is poor: only 1.9% of its soils are rated not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system if sewer is not available23.

SCDES inspects the installation before the system is covered24. We could not confirm a city inspection rule for existing systems or the city's rules on wells, so ask SCDES25.

Can you live in an RV or tiny home in Isle of Palms?

We could not confirm a rule in the City of Isle of Palms on RV living, temporary camping or tiny homes. Call the Isle of Palms Building Department before you buy or park anything on a lot6.

Charleston County's RV rule does not apply here: the county bars living, sleeping or housekeeping in an RV on residential property, but that rule covers unincorporated Charleston County, not city limits26. South Carolina's 14-day campsite limit applies to state parks only and does not answer the question for private land27.

Renting a house is a separate matter. Every owner who rents a residential unit for any length of time needs an Isle of Palms short-term rental business license28.

Building a home in Isle of Palms: the steps, in order

  1. Confirm your zoning district and setbacks with the Isle of Palms Building Department, since the single-family districts differ1.
  2. Check flood zone standards. New construction in flood zones must meet the standards set by the city's flood insurance rate maps5. In Zone VE, new construction needs architect or engineer stamped drawings and V-Zone certification5.
  3. Get SCDES septic approval if the lot is not on sewer21.
  4. Submit the permit application. The city lists construction drawings stamped by an architect or engineer, a survey site plan and elevations, and review may take 4-6 weeks3.
  5. Request inspections at the right time. Required inspections depend on the project type, and the contractor or owner must request each one29.

If you plan to act as your own builder, South Carolina law has an owner-builder exemption with conditions including signing the permit application personally7. We could not confirm an Isle of Palms owner-builder rule, so ask the building department6.

What stays with Charleston County, and what to check before you buy?

Septic and wells run through the state, and the county's unincorporated rules do not apply inside city limits. For land outside the city, see the Charleston County page17.

Charleston County's effective property tax rate is 0.4%30. Typical home insurance in the county runs about $3,279 a year31. Both figures are county-level, not specific to Isle of Palms.

Before you buy, confirm the lot's zoning district and flood zone with the city, confirm sewer availability, and ask whether a homeowners association such as Wild Dunes adds its own review, since the city suggests submitting to the city and Wild Dunes at the same time3.

Watch-outs

  • Searching for Charleston County's building or zoning counter will send you to the wrong office for a lot inside Isle of Palms; the city handles building permits and zoning review there1.
  • South Carolina's newer 2024 building codes start applying to local jurisdictions on January 1, 2027, so check which code edition applies to your permit date20.
  • We could not confirm Isle of Palms rules on RV living, tiny homes, accessory dwellings, lot coverage or minimum home size; ask the city building department at 843-886-99126.
  • Septic permits come from SCDES, and a septic permit cannot be issued where public sewer is accessible22.

Sources

  1. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  2. Building Permits | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  3. Building Permits | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  4. Isle of Palms Building Permit Fees (Isle of Palms), quoted and re-checked
  5. Flood Damage Prevention | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  6. City of Isle of Palms Building Department (isleofpalms.gov)
  7. South Carolina Code Title 40, Chapter 59 — Residential Home Builders (South Carolina statewide rule), quoted and re-checked
  8. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  9. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  10. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  11. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  12. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  13. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  14. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  15. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  16. Zoning | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  17. Zoning & Planning Department, quoted and re-checked
  18. Building Permits | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  19. Building Codes | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  20. 2024 Building Code Modification Index (South Carolina statewide rule), quoted and re-checked
  21. Building Permits | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  22. Professional Soil Classifiers - Sewer Accessibility Verification (South Carolina statewide rule), quoted and re-checked
  23. 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
  24. Site Inspections, quoted and re-checked
  25. South Carolina Department of Environmental Services (SCDES) (des.sc.gov)
  26. Zoning Code Enforcement: Zoning & Planning Department, quoted and re-checked
  27. South Carolina Code Title 51, Chapter 3, State Parks (South Carolina statewide rule), quoted and re-checked
  28. Rental Licenses | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  29. Inspections | City of Isle of Palms, SC (Isle of Palms), quoted and re-checked
  30. Effective property tax rate: Bolthole Index county data
  31. Typical home insurance premium: Bolthole Index county data

Written October 23, 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 Isle of Palms

Isle of Palms’s own rules

  • Building permitRequired

    Demolition or moving of a structure inside Isle of Palms city limits.

    • Demolition permit fee is $50.00.
    • Moving permit fee is $100.00.

    demolition permit fee: 50 USD · moving permit fee: 100 USD

    “The demolition of any structure will require a permit. The fee charged is $50.00. A permit is required for moving any structure. The fee charged is $100.00.”
  • Building code adoptedAdopted (with conditions)

    Construction inside Isle of Palms city limits.

    • The City page lists the 2021 South Carolina or International Building, Residential, Fire, Plumbing, Mechanical, and Fuel Gas Codes with SC modifications; 2009 International Energy Conservation Code; and 2020 National Electrical Code.
    “The following is a listing of all applicable building codes with which the City of Isle of Palms has adopted.”
  • InspectionsRequired

    Projects inside Isle of Palms city limits for which City inspections are required.

    • Which inspections are required depends on project type.
    • The contractor or owner must request the inspection at the correct time.
    • The building inspector may require additional inspections.
    “Depending on the type of project, certain inspections will be required. It is the responsibility of the contractor/owner to request an inspection at the correct time.”
  • Local zoningPresent (with conditions)

    Land inside Isle of Palms city limits.

    • Zoning review occurs in conjunction with building-permit review.
    “In conjunction with a review for a building permit, a zoning review will be conducted to ensure compliance with all applicable local ordinances.”
  • Zoning districtsPublished (with conditions)

    Land inside Isle of Palms city limits.

    • The City identifies seven zoning districts: SR-1, SR-2, SR-3, LC, GC-1, GC-2, and PRD.

    number of zoning districts: 7

    “The city is divided into seven different zoning districts, they are as follows:”
  • Minimum lot sizeSpecified

    SR-1 Single Family Residential district inside Isle of Palms city limits.

    lot size: >= 17500 square feet

    “SR-1 Single Family Residential: Lot size 17,500 sq. ft. or greater, setbacks are 30 feet front and rear yard, 10 feet side yards.”
    2 more reviewed findings on this topic
    • Specified — SR-2 Single Family Residential district inside Isle of Palms city limits.
      “SR-2 Single Family Residential: Lot size is 8,000 sq. ft. or greater, setbacks are 25 feet front and rear yard, 10 feet side yards.”
    • Specified — SR-3 Single Family Residential district inside Isle of Palms city limits.
      “SR-3 Single Family Residential: Lot size is 10,000 sq. ft. of contiguous highland, setbacks are 20 feet front yard, 10 feet side yards and 30 feet rear yard.”
  • SetbacksSpecified

    SR-1 Single Family Residential district inside Isle of Palms city limits.

    • For lots under 17,500 square feet, front and rear setbacks are reduced to 24 feet; side setbacks remain 10 feet.

    front setback: 30 feet (lots under 17,500 square feet: 24 feet) · rear setback: 30 feet (lots under 17,500 square feet: 24 feet) · side setback: 10 feet

    “SR-1 Single Family Residential: Lot size 17,500 sq. ft. or greater, setbacks are 30 feet front and rear yard, 10 feet side yards. If lot is less than 17,500 sq. ft., setbacks are reduced to 24 feet front and rear yard, 10 feet side yards.”
    2 more reviewed findings on this topic
    • Specified — SR-2 Single Family Residential district inside Isle of Palms city limits.
      “SR-2 Single Family Residential: Lot size is 8,000 sq. ft. or greater, setbacks are 25 feet front and rear yard, 10 feet side yards. If lot size is less than 8,000 sq. ft., setbacks are reduced to 20 feet front and rear yard and 10 feet side yards.”
    • Specified — SR-3 Single Family Residential district inside Isle of Palms city limits.
      “SR-3 Single Family Residential: Lot size is 10,000 sq. ft. of contiguous highland, setbacks are 20 feet front yard, 10 feet side yards and 30 feet rear yard. Double frontage lots are prohibited.”
  • Building heightSpecified

    SR-3 Single Family Residential district inside Isle of Palms city limits.

    • Double frontage lots are prohibited.

    maximum height: 40 feet

    “SR-3 Single Family Residential: Lot size is 10,000 sq. ft. of contiguous highland, setbacks are 20 feet front yard, 10 feet side yards and 30 feet rear yard. Double frontage lots are prohibited. Height 40 feet.”
    2 more reviewed findings on this topic
    • Specified — SR-1 Single Family Residential district inside Isle of Palms city limits.
      “SR-1 Single Family Residential: Lot size 17,500 sq. ft. or greater, setbacks are 30 feet front and rear yard, 10 feet side yards. If lot is less than 17,500 sq. ft., setbacks are reduced to 24 feet front and rear yard, 10 feet side yards. Height 40 feet”
    • Specified — SR-2 Single Family Residential district inside Isle of Palms city limits.
      “SR-2 Single Family Residential: Lot size is 8,000 sq. ft. or greater, setbacks are 25 feet front and rear yard, 10 feet side yards. If lot size is less than 8,000 sq. ft., setbacks are reduced to 20 feet front and rear yard and 10 feet side yards. Height 40 feet.”
  • Who permits septicState (with conditions)

    New residential construction using a septic tank inside Isle of Palms city limits.

    • The City directs applicants to obtain the septic-tank permit from the South Carolina Department of Health and Environmental Control.
    “Septic tank permit- Obtained from SC Department of Health and Environmental Control (843-202-7020). This permit may be submitted during the review process.”
  • Septic permitRequired

    New residential construction using a septic tank inside Isle of Palms city limits.

    • The septic-tank permit is obtained from the South Carolina Department of Health and Environmental Control.
    • The City says the permit may be submitted during its review process.
    “Septic tank permit- Obtained from SC Department of Health and Environmental Control (843-202-7020). This permit may be submitted during the review process.”
  • Building in a floodplainRequired

    New construction and substantial improvements in flood zones inside Isle of Palms city limits.

    • Standards are determined by the City flood insurance rate maps.
    • In Zone VE, new construction and additions require architect/engineer-stamped and signed construction drawings and V-Zone certification.
    • In Zone AE, projects typically require an architect stamp unless specifically exempted by the building official.
    “All new construction and substantial improvements are required to meet current flood zone standards as determined by the flood insurance rate maps (FIRM) for the City of Isle of Palms.”
  • Short-term rentalsLimited

    Rental of residential units for any length of time inside Isle of Palms city limits.

    • An Isle of Palms short-term-rental business license is required.
    • The maximum overnight occupancy is typically two people per bedroom plus two people, maximum 12, excluding children under age two.
    • For single-family homes, rental units must be offered in their entirety; private rooms and shared rooms cannot be offered.

    typical maximum overnight occupancy: <= 12 people (excluding children under two; typically two people per bedroom plus two)

    “All property owners who rent residential units (i.e. houses, condos, apartments, hotel rooms) for any length of time must obtain an Isle of Palms short term rental business license.”
  • Permit feesPublished (with conditions)

    Building permits inside Isle of Palms city limits.

    • Plan-submittal and review fee is one-half of the building-permit fee and is additional to it.
    • The schedule was updated 02/01/2026.

    base building permit fee: 60 USD (plus $6 per $1,000, or fraction thereof, of construction value) · construction-value fee: per 6 USD per $1,000 (or fraction thereof)

    “Building Permit Fees $60 plus an additional $6 per thousand dollars (or fraction thereof) of construction value For any project that require the review of plans Plan submittal and Review fee is one-half of the building permit fee and is in addition to the building permit fee.”
  • Permit processPublished (with conditions)

    Residential new-construction permit applications inside Isle of Palms city limits.

    • City review may take 4-6 weeks.
    • City lists construction drawings stamped by an architect or engineer, survey site plan, elevations, and septic-tank permit among required review submissions.

    stated review period: 4-6 weeks

    “The review of any permit application may take 4-6 weeks. The following will need to be submitted for review:”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Isle of Palms or Charleston County directly.

  • Owner-builder exemption — Owner-built residential work inside Isle of Palms city limits.
  • Certificate of occupancy — Residential construction inside Isle of Palms city limits.
  • Minimum dwelling size — Dwellings inside Isle of Palms city limits.
  • Lot coverage — Land inside Isle of Palms city limits.
  • Living in an RV — RV occupancy on private land inside Isle of Palms city limits.
11 more unanswered
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access

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 Isle of Palms publishes no rule on the point, not that none exists. Charleston County’s page lists the county offices to call.

← All of Charleston County: county rules, score and offices