What happens if you skip the permit (and you needed one)
- Stop-work orders: City inspector discovers unpermitted roof work, issues stop-work notice, $500–$1,500 fine, plus forced re-permit at double fee ($400–$1,200 total permits).
- Insurance claim denial: Unpermitted roof-to-wall straps fail inspection during hurricane damage claim; insurer denies $50,000+ roof replacement, citing code violation.
- Resale disclosure liability: Unpermitted structural work triggers SC Property Condition Disclosure Act violation; buyer backs out or demands $10,000–$30,000 credit at closing.
- Lender refinance block: HELOC or refinance underwriting flags unpermitted retrofit; lender requires removal or costly retroactive permitting before loan approval.
Myrtle Beach hurricane retrofit permits — the key details
South Carolina Building Code 2020 (Chapter 3, Wind Loads) requires all roof-to-wall connections in Coastal A wind zones (including Myrtle Beach) to withstand design wind speeds of 130 mph (3-second gust). This is not optional for retrofits involving rafter/truss tie-down: if you're replacing decking, bracing gable ends, or installing hurricane shutters, the City of Myrtle Beach Building Department will require engineered plans or pre-approved retrofit details. The 2020 SC Code mirrors Florida's approach but does NOT enforce the Miami-Dade Technical Approval Service (TAS) 201/202 impact-testing labels — instead, Myrtle Beach accepts ASTM E1886 impact-rated products or equivalent third-party certifications (NFRC, NPGA, etc.). Permit applications must include: (1) roof-connection detail sheet with fastener specs (gauge, length, spacing), (2) shutter or window product spec sheets showing ASTM impact rating, (3) garage-door bracing design if applicable, and (4) secondary water barrier detail (peel-and-stick underlayment below shingle starter course). Most DIY homeowners underestimate the detail-drawing requirement — you can't just say 'install roof straps everywhere'; plans must call out every truss or rafter tie-down point.
The City of Myrtle Beach Building Department operates a hybrid permit system: simple roof-deck attachment or shutter retrofits under $5,000 may be eligible for expedited review (3–5 business days, $200–$300 fee), but most retrofits involving roof decking or structural connections trigger full plan review (7–14 business days, $300–$600 fee). The city requires in-person plan submission (Building Department office, typically at Myrtle Beach City Hall) or online portal upload if available; contact the department directly to confirm current portal access. Plan review includes structural adequacy check against HVHZ wind speeds, but does NOT include the wind-mitigation inspection. This is the critical local wrinkle: after permit approval and final inspection, you must hire a separate SC-licensed wind-mitigation inspector to complete the OIR-B1-1802 form (Residential Wind Mitigation Inspection Report). This form is generated by a Florida-certified inspector, but SC homeowners are increasingly using it to unlock insurance discounts from carriers operating in both states. The permit gets you legal; the wind-mit inspection gets you the insurance savings. Many homeowners pull the permit but skip the wind-mit inspection, leaving $1,000–$3,000 in annual discounts on the table.
Exemptions are narrow: roof-deck attachment (decking-to-rim board fasteners) under 100 sq ft does not require a permit if using pre-approved fastening schedules (e.g., 8d nails @ 6 inches o.c.). However, ANY roof-to-wall connection upgrade (installing hurricane ties on rafters or trusses), secondary water barrier, shutter installation, impact-window replacement, or garage-door bracing requires a full permit. The reason: fastener pull-out and connection failure are the leading failure modes in coastal wind events, and the city inspects for proper anchorage. Shutters are a gray area — permanent accordion or panel systems bolted to the frame require permits and engineering; removable storm panels do not IF they're manual-deploy only (no motorized system). DIY homeowners often think 'I'm just adding fasteners, why is that a permit?' The answer is liability and wind-speed certification: if you specify the wrong fastener length, spacing, or quality grade, a hurricane failure could cascade (torn decking → water entry → structural rot → collapse). The permit and inspection are the city's way of catching fastener mistakes before they become insurance claims.
Myrtle Beach's coastal geography adds two practical wrinkles. First, sandy foundation soils and shallow water table (especially in neighborhoods near the Intracoastal or in pluff-mud areas near marshlands) affect foundation and post inspection — inspectors may require additional footing depth documentation or soil bearing-capacity certification if you're installing new shutter posts or bracing. Second, salt-air corrosion is aggressive in Myrtle Beach proper (within 1 mile of ocean): all fasteners and metal components must be stainless steel or hot-dip galvanized (ASTM A153, not just 'galvanized'); copper or aluminum flashing is required, not steel. The building department's plan review will flag any carbon-steel fasteners or unrated materials. Finally, Myrtle Beach is within the range of the My Safe Florida Home grant program (up to $10,000 for retrofits) — while technically a Florida program, some SC insurers and nonprofits partner on wind-mitigation grants. If you're insured through a Florida-domiciled carrier (FAJUA, Heritage, United, etc.), check whether grants apply; if not, SC's own wind-mitigation incentive programs may be available through your insurer or Horry County emergency management.
Timeline and inspection sequence matter. After permit issuance (allow 1–2 weeks from submission to approval), you have 180 days to start work (standard SC rule). Inspections run: (1) rough inspection (roof decking or framing exposed, before shingles or siding cover fasteners), (2) final inspection (after all work complete, shingles in place, shutters installed), (3) wind-mitigation inspection by licensed inspector (must be scheduled separately, typically within 30 days of final building permit sign-off). Total timeline: 6–12 weeks from permit pull to insurance discount paperwork. Costs break down as: permit fee ($200–$600), material and labor ($3,000–$15,000 depending on scope), and wind-mit inspection ($150–$300). The wind-mit inspection is NOT part of the building permit process — it's a separate contract with a private inspector, but it's mandatory if you want insurance discounts. Pro tip: confirm your insurance carrier accepts OIR-B1-1802 forms from SC inspectors before pulling the permit; a few older SC carriers may still require Florida-domiciled inspectors, adding travel costs or making the retrofit less economical.
Three Myrtle Beach wind / hurricane retrofit scenarios
Wind-speed design zones in Myrtle Beach and why they matter to your permit
Myrtle Beach is in ASCE 7 (American Society of Civil Engineers) wind zone 'Coastal A,' with design wind speeds of 130 mph (3-second gust), 120 mph mean hourly wind speed. This is LOWER than Miami-Dade (140 mph), but HIGHER than inland South Carolina (100–110 mph). The City of Myrtle Beach Building Department adopted the 2020 SC Building Code, which is based on the 2018 IBC with SC amendments. Critically, SC's code does NOT include Florida's High Velocity Hurricane Zone (HVHZ) overlay, but it DOES include equivalent wind-load tables in Chapter 3. This means you don't need Miami-Dade TAS 201/202 labels, but you DO need ASTM E1886 impact ratings or equivalent certifications. The permit reviewer will compare your product specs against ASCE 7 130 mph design loads — if a shutter or window is rated for only 120 mph, it will be flagged as non-compliant.
Why this matters: retrofit materials must be explicitly rated for 130 mph. Generic 'hurricane-rated' labels are not acceptable; the product spec sheet must cite ASTM E1886 Section 7 (impact resistance), ASTM E1996 (large missile impact), or equivalent. Many big-box hurricane shutters and impact windows sold nationally are rated for 110–120 mph and are UNDERRATED for Myrtle Beach. The permit application must include material specs; the plan review will cross-check them against ASCE 7. If your shutter is 120 mph rated and the code requires 130 mph, the city will issue a Request for Information (RFI), delaying approval by 3–5 days, and you'll either upgrade the product or provide engineer certification that 120 mph is adequate (uncommon and expensive). Pro tip: before buying shutters or impact windows, ask the vendor for the ASTM E1886 test report and confirm it meets 130 mph requirement.
Secondary water barrier (underlayment) ties back to wind zone too. In Coastal A zones, heavy rainfall often accompanies wind events; the 2020 SC Code now requires ASTM D1970 synthetic underlayment (not 15-lb felt) in roof assemblies, especially in zones subject to 120+ mph winds. The reasoning: felt absorbs wind-driven rain and can trap moisture, leading to deck rot. Synthetic peel-and-stick meets the requirement and must be continuous under the shingle starter course. The building inspector will pull back starter shingles at final inspection to verify underlayment is present and lapped correctly (min. 2-inch overlap, 6 inches at valleys). This is a common rejection point — many roofers install felt underneath, thinking 'it's under the shingles, no one will see it.' Wrong. Myrtle Beach inspectors check, and you'll be called back to tear off shingles and install proper underlayment.
The insurance inspection (OIR-B1-1802) and why it's NOT part of your building permit
After your building permit final inspection, you need a wind-mitigation inspection — but it's a SEPARATE process. The OIR-B1-1802 form (Florida Insurance Commission Residential Wind Mitigation Inspection Report) is the form that insurers use to calculate discounts. In Florida, this is mandatory for all wind-mitigation work; in South Carolina, it's optional BUT highly recommended because most insurers operating in SC (FAJUA, Heritage, United, etc.) recognize the form and apply 10–30% discounts based on the report. The inspection must be performed by a LICENSED WIND-MITIGATION INSPECTOR. In Florida, this is a specific certification from the Florida Department of Business and Professional Regulation. In South Carolina, there is no SC-specific wind-mitigation inspector license, but SC has reciprocity with Florida-certified inspectors — many licensed Florida wind-mit inspectors will cross the state line to perform SC inspections.
The critical local detail: Myrtle Beach has no municipal requirement for the OIR-B1-1802 form, but the City of Myrtle Beach Building Department does recognize it as evidence of code compliance. If you submit an OIR-B1-1802 form (completed by a licensed inspector) to the building department as part of your permit closeout, the department may waive additional inspection requirements for minor gaps. However, this is informal; the standard path is (1) pull building permit, (2) complete work, (3) get building final inspection, (4) hire licensed wind-mit inspector, (5) submit OIR-B1-1802 to your insurer for discount. The wind-mit inspection costs $150–$300 and typically takes 30–45 minutes (walk the roof, check fasteners, verify tie-downs, inspect door and shutter installation). Most homeowners do NOT do this step, leaving thousands in annual insurance discounts on the table. If you've invested $10,000 in retrofits, the $300 wind-mit inspection is cheap insurance.
How to find a licensed wind-mit inspector in Myrtle Beach: search 'wind mitigation inspector Myrtle Beach SC' or contact your insurance agent (they often have preferred vendors). Confirm the inspector holds current Florida wind-mitigation license (ask for license number and verify on DBPR website). Some inspectors are also licensed contractors or building inspectors, which can simplify scheduling. Cost is fixed (expect $150–$300) and typically payable to the inspector directly. The inspector will submit the completed OIR-B1-1802 form to you; you submit it to your insurer, and the discount is applied within 30–60 days. Discounts vary by carrier and retrofit scope, but typical savings are 15–25% on wind/hail premiums. On a $800 annual wind/hail premium, that's $120–$200/year, paying back the retrofit in 4–6 years.
Myrtle Beach City Hall, 3231 Mr. Joe White Avenue, Myrtle Beach, SC 29577
Phone: (843) 918-1000 (main) or Building Permits: (843) 918-1014 | https://www.myrtlebeachsc.gov (check 'Permits & Licenses' or 'Online Services' for portal access)
Monday–Friday, 8:00 AM – 5:00 PM (verify by phone)
Common questions
Do I need an engineer or architect to design my roof-to-wall hurricane tie-downs?
Not necessarily. The City of Myrtle Beach accepts PRE-APPROVED retrofit details (e.g., Simpson Strong-Tie, USP, Hilti product installation guides rated for 130 mph) without engineer stamp. If you use a manufacturer's standard detail and follow the fastener schedule exactly, the permit review will likely approve it over-the-counter. However, if your home has unusual framing (post-and-beam, custom roof pitch, damaged rafters), you'll need engineer calculations. Cost: pre-approved detail = $0–$200 (coordinator fee); engineer stamp = $400–$1,200. Ask the building department during pre-application whether your retrofit qualifies as 'standard' — they may have a list of approved details.
My house is in North Myrtle Beach in an AE flood zone. Does that change the permit requirements?
Yes. North Myrtle Beach and unincorporated Horry County properties in AE/VE zones (base flood elevation 8–12 feet) must meet additional floodplain-overlay requirements. All retrofit work — shutters, door bracing, roof work — must be reviewed by the County Floodplain Administrator in addition to the City Building Department. Flood-zone compliance adds 5–10 days to review and may require that work not obstruct emergency egress or create new flood-intrusion pathways (e.g., garage-door bracing must not block evacuation exits). Contact Horry County Building Codes & Licensing (843-915-5000) to confirm flood-zone status and required floodplain certification.
Can I do the retrofit work myself, or do I need a licensed contractor?
South Carolina Code § 40-11-360 allows owner-builders to pull permits and perform work on their own property without a general contractor license. However, the building inspector's standards are the same — fasteners must meet spec, tie-downs must be installed correctly, shutter bracing must be engineered or pre-approved. Many owner-builders do the work themselves, but they hire a contractor for plan preparation ($500–$1,200) to avoid plan-review rejections. Roofing work is NOT licensed in SC, so a homeowner can install shingles; however, if the retrofit involves structural bracing or electrical (motorized shutters), you may need a licensed electrician for the electrical circuit.
What is the cost range for a typical hurricane retrofit in Myrtle Beach?
For a full retrofit on a typical 2,000 sq ft single-story home (roof ties, secondary water barrier, shutters, impact door): expect $12,000–$25,000. Breakdown: permit & inspections $500–$900, roof tie-downs $1,500–$3,000, underlayment $400–$600, shutters (if all windows) $7,000–$14,000, impact door (garage) $1,500–$3,000, labor $2,000–$5,000, wind-mit inspection $200–$300. Partial retrofits (e.g., roof ties + underlayment only, no shutters) run $4,000–$8,000. Insurance savings of 15–25% typically recoup the retrofit cost in 4–6 years.
Do I need stainless steel or hot-dip galvanized fasteners for Myrtle Beach?
Yes. Myrtle Beach's coastal salt-air environment corrodes carbon-steel fasteners within 3–5 years. The 2020 SC Building Code does not explicitly mandate stainless steel, but the Myrtle Beach Building Department will flag any carbon-steel fasteners in roof ties, shutter bolts, or flashing. Hot-dip galvanized (ASTM A153) is acceptable and cheaper than stainless; stainless (A307 bolt, 304/316 grade) is preferred and lasts longer. Verify with your fastener supplier and contractor that fasteners meet ASTM spec, not just 'galvanized-looking.' Budget 10–15% premium for galvanized vs. carbon steel.
How long does the permit review and inspection process take in Myrtle Beach?
Timeline: permit submission to approval = 5–14 days (expedited 5–7 days for simple projects, full review 7–14 days). Construction = 2–6 weeks depending on scope. Building inspections (rough + final) = 1–2 weeks (inspector must be called and scheduled; may have 5–10 day backlog). Wind-mit inspection (after final building sign-off) = 3–7 days to schedule. Total: 6–12 weeks from permit pull to insurance discount paperwork. Plan ahead if you need work done before hurricane season (June–November).
What happens if the building inspector fails my retrofit during final inspection?
Common failure reasons: fastener spacing off-spec, underlayment missing or improperly lapped, shutter bracing not engineered, garage-door frame inadequate. The inspector will issue a punch list or RFI (Request for Information); you have 30 days to correct deficiencies and request re-inspection. Re-inspection is typically free (no additional permit fee), but you pay for corrections (could be $500–$3,000 if structural work is needed). If deficiencies are minor (e.g., fasteners 18 inches o.c. instead of 16 inches), you may get conditional approval pending correction. Always ask the inspector what specifically failed and get written explanation so you know exactly what to fix.
My insurer says they don't recognize SC OIR-B1-1802 forms. What should I do?
Some smaller or legacy SC-based insurers do not use the Florida form. Ask your insurer for their PREFERRED wind-mitigation inspection format or certification. Some carriers use proprietary inspection forms. If your insurer doesn't recognize OIR-B1-1802, ask whether they offer discounts for documented retrofits (photos, invoices, permit sign-off). You could also get a second opinion from a different insurer (Allstate, State Farm, Homeowners Choice) to see if they offer better discount terms. The permit and building inspector sign-off are valuable regardless — they prove the work was done to code — so the financial benefit may come from a carrier switch rather than discount on your current policy.
Can I install temporary or removable storm panels instead of permanent shutters to avoid the permit?
Removable storm panels (plywood, aluminum clips) installed seasonally do NOT require a permit. However, if you install permanent bolted accordion, rolling, or panel shutters, a permit IS required. The distinction: temporary = no permit; permanent bolting to frame = permit. Some homeowners install bolt holes during initial permit, then use removable panels — this requires a permit for the hole-drilling work, but you then swap seasonal panels without additional permits. If budget is tight, consider: (1) permit for roof ties + secondary barrier (mandatory, $300–$500), (2) skip permanent shutters initially, (3) retrofit shutters in later years as budget allows. This phased approach is legally acceptable as long as the roof is compliant with current code.
Is there financial assistance or grants available for hurricane retrofits in Myrtle Beach?
The MY SAFE FLORIDA HOME grant program (up to $10,000 per household) is operated by Florida but may apply if you're insured through a Florida-domiciled carrier (FAJUA, Heritage, United, etc.). Check with your insurer to see if you're eligible. South Carolina also has wind-mitigation incentives through some insurers and Horry County emergency management — contact the County Emergency Services (843-915-5000) for information. Additionally, some nonprofit organizations (Habitat for Humanity, community action agencies) offer retrofit cost-sharing programs. Finally, the retrofit cost may be tax-deductible if it's part of a disaster-recovery rebuilding project; consult a tax professional. Don't assume you're ineligible; check multiple sources.