Permits and impact glass for sliding doors in Horry County

Repairing a sliding glass door in Horry County needs no permit. Replacing one usually does. That single line covers most of what homeowners and property managers on the Grand Strand actually need to know, and the rest of this page is the detail: which office issues the permit, when impact-rated glazing is required, what a condo association or property manager has to think about that a homeowner does not, and what South Carolina requires of the contractor doing the work.

The line between a repair and an alteration

Every job on this site falls on one side of a simple test: does the work change the opening in the wall? Rollers, a stainless track cap, a mortise lock or handle, weatherstrip, a screen door, and a new insulated glass unit set into your existing panel all leave the frame, the rough opening, and the structure exactly as they were. That is maintenance.

Pulling the frame out and setting a new unit is different. It disturbs the flashing and the water management of the wall, it can change the size of the opening, and it changes the glazing in it. That is an alteration, and it is the work a building department wants to see. Full replacement pricing on this site, $1,500 to $4,000 for a standard non-impact two-panel unit and $3,000 to $6,000 impact-rated, assumes that step.

Unincorporated Horry County

Horry County Code Enforcement states that any owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure must obtain a permit, and the same applies to regulated electrical, gas, mechanical, and plumbing work. The county publishes an exemption list drawn from the 2021 International Residential Code and 2021 International Building Code it has adopted: free-standing accessory buildings of 200 square feet or less, replacing shingles or finished flooring where no structural sheathing is involved, fences not exceeding seven feet, painting, papering, tiling, carpeting and finish work, retaining walls under four feet, sidewalks and driveways, minor plumbing repairs, and portable appliances. Doors are not on that list. The only window-adjacent exemption is for window awnings supported by an exterior wall within stated height and projection limits.

On fees, the county prices new one- and two-family residential work per square foot with a stated minimum of fifty dollars plus twenty-five dollars in zoning fees, and prices alterations from Appendix B of the 1997 Standard Building Code plus zoning fees. That is why a fair quote passes the permit fee through at cost as a separate line rather than folding a guess into the price. Applications run through the county’s online permit and plan portal.

This is the rule for Carolina Forest, Socastee, Longs, and every other unincorporated address in the county.

City of Myrtle Beach

Inside the city limits, the Construction Services Department handles building permits and inspections, plan review, trade permits for electrical, plumbing, gas, and mechanical work, floodplain reviews, and property maintenance code enforcement. The city adopted South Carolina’s mandatory building codes effective January 1, 2023, with the state modifications. A replacement door inside the city goes to that department rather than to the county, and its forms live in the city’s documents center.

North Myrtle Beach

North Myrtle Beach runs its permitting through the city’s own online portal and its Planning and Development Department. Two things there matter more than they do inland. First, all floodplain development requires a local permit issued by the Building Division. Second, the city applies the substantial improvement and substantial damage rule: where repairs to a structure reach fifty percent or more of its market value, the work has to comply with local floodplain regulations, which can mean elevation or flood-proofing requirements that have nothing to do with the door itself. A building-wide door program in an oceanfront building is worth checking against that threshold before it is scoped.

The southern end of our coverage is a different county entirely. Pawleys Island and Litchfield are in Georgetown County, and the Town of Pawleys Island runs its own building department with third-party inspections and participates in the National Flood Insurance Program’s Community Rating System.

Impact glazing and the wind-borne debris region

South Carolina’s Building Codes Council adopted the 2021 South Carolina Building Codes at its meeting on October 6, 2021, effective January 1, 2023. Under the residential code as adopted with state amendments, section R301.2.1.2 requires that exterior glazing in buildings located in wind-borne debris regions be protected from wind-borne debris. Protection means glazing that passes the Large Missile Test of ASTM E1886 and ASTM E1996 as modified in the code, or an approved impact-resistant covering over it; garage doors are handled separately under ANSI/DASMA 115.

The region itself is defined by the ultimate design wind speed: within one mile of the coastal mean high water line where it is 130 mph or greater, or anywhere it is 140 mph or greater. Inside the region, the code sorts openings into wind zones that set the ASTM E1996 test level: Wind Zone 1 covers 130 mph up to 140 mph, Wind Zone 2 covers 140 mph up to 150 mph beyond one mile from the coastline, Wind Zone 3 covers 150 to 170 mph, or 140 to 170 mph within one mile of the coastline, and Wind Zone 4 is above 170 mph. South Carolina’s amendment to R301.2.1 directs that buildings comply with the previously published maps of the South Carolina Building Codes Council, and allows the local building official to delineate categories within the limits set out by the Applied Technology Council. The Council publishes a wind and seismic map for Horry County for exactly this purpose.

The practical result on the Grand Strand: the oceanfront strip is inside the debris region and near-ocean openings usually are, while inland Horry County generally is not, and the person who decides for your address is the building official reading the county map, not a salesperson. Repairs never trigger the rule, because a new sealed unit in an existing panel does not change the glazing in the opening for code purposes. A replacement does. That is the whole reason an impact-rated replacement costs roughly double a non-impact one, and it is covered further in the impact glass or shutters guide. The units that go into those openings on this coast are mostly covered on the PGT and CGI page, with coastal ranges from Andersen and Pella as the other option.

What property managers need for condo balcony doors

Three things beyond the homeowner checklist. First, who owns the door: whether a balcony slider is the unit owner’s property or a common or limited common element is set by the building’s master deed under South Carolina’s Horizontal Property Act, and that decides who is invoiced and who signs the permit application. Second, the repair-versus-alteration line applies per unit and per building. A program of rollers, track caps, locks, and glass units across a stack of units is maintenance and does not need permits, which is a large part of why building-wide repair programs are the economical route. Replacing doors does. Third, the substantial improvement threshold above: a large enough replacement program in a floodplain building can pull the whole structure into a floodplain compliance conversation. Ask the city floodplain manager before scoping, not after.

South Carolina licensing, honestly stated

The Residential Builders Commission at South Carolina LLR registers Residential Specialty Contractors for undertakings that exceed five hundred dollars, and lists ten registered trade classifications: vinyl and aluminum siding installers, insulation installers, roofers, floor covering installers, masons, dry wall installers, carpenters, stucco installers, painters and wallpaperers, and solar panel installers. Glazing and doors are not among those ten. Anyone needing more than three trade classifications at once must apply to become a Residential Builder, and a Residential Builder license covers residential construction up to three stories and sixteen units where the project cost exceeds $5,000. Commercial work above $10,000 falls to the South Carolina Contractor’s Licensing Board instead.

What that means in plain terms: sliding door work sits across the boundary between trade registration and builder licensing depending on scope and dollar value, and the honest thing for any company on this coast to do is tell you which credential applies to your job and show it to you. A replacement install should come with the credential that fits its scope. We do not publish a license number here; ask anyone who works on your door, us included, for credentials before the panel comes out.

Sources

• Horry County Code Enforcement, when to get a building permit and cost of a building permit
• City of Myrtle Beach Construction Services Department
• City of North Myrtle Beach permitting portal and Build Responsibly floodplain guidance
• South Carolina Building Codes Council, 2021 code adoption and county wind and seismic maps
• 2021 International Residential Code as adopted in South Carolina, R301.2.1.2 and R301.2.1.2.1
• South Carolina LLR Residential Builders Commission, specialty contractor registration and residential builder licensing
• Town of Pawleys Island building department

Numbers for the work itself are all on the pricing page, and the replacement estimator will give you a range for a new door before you talk to anyone.