What happens if you skip the permit (and you needed one)
- Stop-work orders in North Myrtle Beach carry $250–$500 fines per violation, and the city building inspector can order removal of unpermitted roof work — costing $2,000–$8,000 in rework plus materials.
- Insurance claims on roof damage will be denied if the insurer discovers retrofit work (straps, secondary barriers, new decking) was done without permit — claim denial can run $15,000–$50,000+ on major wind events.
- When you sell, South Carolina Property Disclosure Act requires disclosure of unpermitted work; buyers will demand either a retroactive permit (often refused after final framing inspection) or a $5,000–$15,000 price reduction.
- Refinancing or equity-line requests will stall if the lender's title company flags unpermitted structural work — resulting in $3,000–$10,000 in additional appraisals or forced bonding.
North Myrtle Beach hurricane retrofit permits — the key details
North Myrtle Beach Building Department administers permits under South Carolina Building Code (2015 IRC with SC amendments). For hurricane retrofits, the critical standard is SC Building Code Section 1609.1.1, which requires roof-to-wall connection resistance to basic wind speeds of 115 mph (3-second gust) in the Coastal Zone — slightly lower than Miami-Dade's 140+ mph, but still serious. Roof-to-wall straps (also called hurricane ties or rafter ties) must be installed at every rafter or truss bearing point and must be sized and fastened per the engineer's calcs. Secondary water barriers (peel-and-stick underlayment installed under shingle starters per SC Building Code R905.2.7) are required on new or re-roofed sections. Hurricane shutters and impact-resistant windows must resist design-wind pressures per ASTM E1886 or TAS equivalents (though SC does not require the Miami-Dade TAS 201 stamp — this is a major cost and time saver). Garage-door bracing must be engineered for the design wind speed and installed by a licensed contractor. All of these trigger permitting.
The City of North Myrtle Beach's permit process moves faster than Florida coastal cities because the design pressures are lower and the plan-review checklist is shorter. You submit plans (hand-drawn sketches are often acceptable for strap retrofits under $25,000) plus an engineer's certification (seal required) to the Building Department's counter or portal. Over-the-counter approval for retrofit projects typically happens in 1-3 days if the submittal is complete; if plan review is required (for example, if you're replacing 50%+ of the roof), expect 2-4 weeks. Permit fees are 1.5-2% of project valuation (e.g., a $15,000 retrofit costs $225–$300 in permit fees, plus $50–$100 for plan review if applicable). The city does not charge separate 'wind-mitigation' or 'hurricane retrofit' fees — they're built into the standard building-permit fee schedule. Once permitted, you'll have two inspections: one in-progress (when straps are installed but before roof sheathing/shingles are applied) and one final (after all work is complete and secondary barriers are visible). A third inspection — the wind-mitigation insurance discount inspection — must be performed by a licensed wind-mitigation inspector (not the city building inspector) and documented on the OIR-B1-1802 form; this form is what unlocks 10-30% insurance discounts with most South Carolina and East Coast carriers.
One key surprise: North Myrtle Beach requires secondary water barriers (peel-and-stick under shingle starters per R905.2.7) on all roof work, even if you're only replacing a few straps. This is not always obvious from the permit application, and contractors often miss it — resulting in permit rejection or a stop-work order during the in-progress inspection. The barrier must be visible under the shingle starter at the eaves and must extend up the roof slope a minimum of 36 inches (or per engineer spec). If your retrofit includes any roof-sheathing replacement, the entire roof deck must get secondary barrier — standard ice-and-water shield or equivalent. Many homeowners balk at the extra $800–$2,000 cost, but it's non-negotiable in North Myrtle Beach and almost always recovers itself in insurance savings (most insurers give 5-10% additional discount for secondary barriers). Another local quirk: the city requires 'rafter-by-rafter' straps on older homes with hand-nailed joinery; if your home was built pre-1980 and has irregular rafter spacing or sistered joists, the engineer may spec custom strap locations, which can add 2-3 weeks to the permitting timeline because the city will ask for site photos to confirm the existing condition.
The OIR-B1-1802 wind-mitigation form is not issued by the city but by the State of Florida and South Carolina insurance regulators — it's the golden ticket to insurance savings. The form must be completed by a licensed wind-mitigation inspector and signed by that inspector's professional license number. North Myrtle Beach does not have a pool of municipal inspectors who do this; you must hire a private wind-mitigation inspector (typically $300–$600 for a home inspection plus retrofit verification). However, many roofers and general contractors have wind-mitigation inspector certifications, so you can often bundle the retrofit contractor with the inspector and save $200–$300. The form covers roof-deck attachment, secondary water barrier, roof-to-wall straps, impact windows, hurricane shutters, and garage-door bracing — each category is checked yes/no. Insurers use this form to underwrite discounts, so accuracy matters. The city Building Department does not review the OIR-B1-1802 (it's a state insurance form), but many contractors submit a copy with the final permit inspection to show the retrofit is insurance-qualified. Timing: you can pull the permit first, do the work, and schedule the insurance inspection within 60 days of substantial completion; the form is valid for 5 years.
Budget planning: a typical North Myrtle Beach hurricane retrofit (roof-to-wall straps across a 1,500-sq-ft home, secondary water barrier on re-roofed sections, and basic exterior-door reinforcement) runs $8,000–$18,000 in materials and labor. Permit fees are $150–$400. Wind-mitigation inspection: $350–$600. Insurance savings typically offset the retrofit cost in 3-5 years if you stay with the same carrier. Some homeowners also pursue SC's Home Hardening Grant (administered through FEMA or state DHEC) — up to $5,000–$10,000 in matching funds for retrofit work — but applications are competitive and require pre-approval. If you're financing the retrofit, get pre-permit cost estimates and submit them with your permit application; the city will issue a permit valuation that locks your fees, even if the contractor's final bill is higher. This protects you from surprise fee increases mid-project.
Three North Myrtle Beach wind / hurricane retrofit scenarios
Why North Myrtle Beach's secondary-water-barrier rule is stricter than you'd expect
North Myrtle Beach's adoption of South Carolina Building Code R905.2.7 (secondary water barrier on all roof work) reflects coastal-erosion lessons learned from Hurricanes Hugo (1989), Florence (2018), and Dorian (2019). Peel-and-stick ice-and-water shield or equivalent creates a redundant moisture barrier when the primary shingle layer is breached or delaminated by wind uplift — preventing water infiltration into the attic and structural cavities. Many homeowners think this is overkill because their home 'has never leaked before,' but the barrier's value is most obvious after a direct wind hit: homes with secondary barriers sustained 30-40% less interior water damage than homes without in post-Hurricane Florence assessments (documented in Charleston County building department studies). The cost is typically $800–$2,000 for a typical 1,500-sq-ft home (barrier material ~$0.30–$0.50/sq ft, plus labor to roll it and seal seams). North Myrtle Beach inspectors are trained to look for barrier on the in-progress inspection, and if it's missing or incomplete, they'll issue a 'corrections required' stop-work order — delaying your project 1-2 weeks.
The reason secondary barriers are mandatory even on strap-only retrofits (where no new sheathing is installed) is that once the roofer is on-site hammering shingles and fastening straps, the roof is 'disturbed' and contractor liability coverage requires re-securing the roof to full code, which includes the barrier. Insurance carriers also view a disrupted roof as a liability gap — if a contractor works on your roof without bringing it to code (including secondary barrier), the carrier may exclude that work from coverage in a future claim. North Myrtle Beach Building Department acknowledges this by requiring barrier even on cosmetic or strap-only jobs; this protects both the homeowner and the contractor. If you've had a past retrofit or re-roofing without a secondary barrier, you can retrofit it retroactively by hiring a roofer to carefully lift shingles, roll barrier underneath (and up to the peak on gable vents or penetrations), and re-nail — cost is typically $500–$1,500 depending on roof complexity. Many homeowners do this when they apply for the OIR-B1-1802 form and discover the inspector flagged missing barrier.
One common error: contractors sometimes install barrier only on the first 4-6 feet of roof slope (the 'splash zone') and assume the upper roof is protected by the primary shingles. North Myrtle Beach inspectors reject this. Code-compliant installation requires barrier to extend from the eaves up the slope a minimum of 36 inches, or as engineered (whichever is more). On a low-slope or partial re-roof, this can mean barrier on 50%+ of the deck, not just the edge. The city's in-progress inspector will climb onto the roof and visually confirm the barrier line; if it's short, correction is required before the project can proceed to final.
Insurance discount timing and the OIR-B1-1802 form — how to maximize savings
The OIR-B1-1802 Wind Mitigation Inspection Form is issued by Florida Insurance Commission (and accepted by South Carolina and East Coast carriers) and is the key to unlocking insurance discounts on hurricane retrofits. Unlike a building permit (which is code compliance), the OIR-B1-1802 is purely an insurance underwriting document — it certifies that your home has certain wind-resistant features (roof-deck attachment, secondary barrier, roof-to-wall straps, impact windows, hurricane shutters, garage-door bracing). Each feature is checked 'yes' or 'no,' and the more boxes checked, the bigger the discount (typically 5-30% depending on insurer and feature mix). The form must be signed by a licensed wind-mitigation inspector — not the city building inspector. North Myrtle Beach does not have a municipal pool of inspectors who do this; you hire a private inspector (often a roofer, general contractor, or third-party inspection company with state licensure). Cost: $300–$600 per home for a full retrofit inspection.
Timing strategy: wait until the retrofit is 100% complete and final city inspection is passed before scheduling the wind-mitigation inspector. This avoids the risk of the building inspector finding a correction during the city's final inspection (e.g., a strap is loose, secondary barrier has a tear) — if a correction is required after the insurance form is signed, you may have to call the inspector back for re-verification, adding $150–$300. Best practice is to have your retrofit contractor coordinate with the wind-mitigation inspector before the final city inspection, so the private inspector can watch the city inspector's final walk and note any pending corrections. Once final city inspection is passed, schedule the private wind-mitigation inspector within 7 days (same crew still on-site if possible, reduces cost). The inspector verifies each retrofit feature with photos and physical testing (e.g., tug-testing straps, checking fastener type and spacing, verifying secondary barrier under shingles), then signs the OIR-B1-1802. Submit the form to your insurance carrier immediately; discounts typically apply to your next renewal (or mid-term if you request it).
Insurance savings compound fast. A $12,000 retrofit with typical discounts (10-15% on wind/hail coverage) saves $150–$300 per year, which recovers the retrofit cost in 4-8 years. If your current insurer increases premiums due to age or coastal risk, the retrofit discount can offset those increases and sometimes lower your overall premium. Many carriers ask for the OIR-B1-1802 form before issuing a quote if the home is 20+ years old or has had prior claims. North Myrtle Beach homeowners often see discounts jump from 0% (no form) to 10-20% (form + features) simply by completing the inspection and submitting the form — even if the retrofit features were already present but undocumented. This is why pulling the form is critical: it's not just about compliance, it's about money in your pocket.
North Myrtle Beach City Hall, North Myrtle Beach, SC 29582
Phone: (843) 280-5555 (main); (843) 280-5565 (building permits — confirm locally) | https://www.northmyrtlebeachsc.gov/ — building permit portal or in-person counter submission
Monday–Friday, 8:00 AM–5:00 PM (closed holidays; verify closures locally)
Common questions
Do I need an engineer for a simple hurricane-shutter retrofit?
Not required for shutters alone if the manufacturer provides pre-calculated anchor-bolt specs for your wall type (e.g., 'vinyl/masonry, 115 mph design wind'). However, if your home has unusual wall construction (e.g., brick over stone, or a historic façade), North Myrtle Beach will ask for an engineer's verification of anchor capacity. For strap retrofits or roof-replacement projects, an engineer's seal is mandatory — cost is typically $300–$800 for calcs and site inspection.
Can I install roof-to-wall straps myself without a licensed contractor?
South Carolina Code § 40-11-360 allows owner-builders to perform residential work on their own property, including strap installation. However, North Myrtle Beach requires a valid building permit (which you can pull yourself) and the work must pass city inspection. If the inspector finds improper fastening or spacing, you'll be ordered to correct it — potentially at contractor cost. Many homeowners hire a roofer to do straps and do other work (like painting or trim) themselves to balance cost and code compliance.
How long does the OIR-B1-1802 form stay valid for insurance purposes?
The form is valid for 5 years from the date of inspection. If you change insurers or refinance during that window, you can submit the same form to the new carrier; they'll accept it as proof of retrofit work. After 5 years, you'll need a new inspection (and new form) to claim discounts on a new policy.
Will my homeowner's insurance cover the retrofit work if I skip the permit?
No. Most homeowner's policies include a clause excluding coverage for unpermitted work. If the insurer discovers you did a retrofit without a permit (via inspection, prior claim history, or title search during a sale), they can deny claims related to that work or cancel the policy. The permit is also mandatory for the OIR-B1-1802 wind-mitigation form — the form requires a permit number to be valid.
What's the difference between a secondary water barrier and regular roof underlayment?
Regular underlayment (tar-paper or synthetic) is the base layer under shingles and protects against minor leaks. Secondary barrier (peel-and-stick ice-and-water shield) is a rubberized, self-adhering membrane that creates a waterproof seal — it's sticky on the back and adheres permanently to roof decking, providing redundant protection if shingles are torn or lifted during wind. North Myrtle Beach requires secondary barrier in the most vulnerable zones (eaves, gable vents, roof penetrations) and sometimes across the entire roof on re-roofs.
Can I use a contractor from out of state (e.g., Florida roofer) for my North Myrtle Beach retrofit?
Yes, but they must be licensed in South Carolina or must work under a SC-licensed general contractor or roofer. Verify their SC license at the SC Department of Labor, Licensing & Regulation website. Out-of-state contractors often charge travel time and may be unfamiliar with SC-specific code quirks (e.g., secondary barrier requirements); hiring a local contractor familiar with North Myrtle Beach inspectors typically saves 1-2 weeks on permitting and inspection scheduling.
Are there state or federal grants to help pay for hurricane retrofits?
South Carolina has no statewide hurricane-retrofit grant program like Florida's My Safe Florida Home. However, FEMA occasionally funds Home Hardening Grant programs through county emergency management offices after declared disasters. Check with Horry County (which includes North Myrtle Beach) Emergency Management for current programs. Some homeowners also claim retrofit costs as home-improvement deductions on state taxes (verify with a tax professional). Most insurance carriers offer premium discounts (5-30%) that often offset retrofit cost in 3-5 years — this is the main financial incentive.
If I refinance my mortgage after a retrofit, will the lender require new appraisals?
Possibly. If the retrofit increased your home's documented value (common for impact windows or major roof work), a lender may order a new appraisal to confirm. The good news is that retrofits often increase value by 50-100% of their cost due to insurance-discount capitalization and reduced future-damage risk. Have your permit, final inspection, and OIR-B1-1802 form ready for the lender's title company.
What happens if North Myrtle Beach rejects my permit application?
The city will issue a 'Request for Additional Information' (RAI) citing specific code sections — e.g., 'Secondary barrier must extend 36 inches per R905.2.7; provide engineered detail.' You have 30 days to resubmit corrections. Common rejections are missing secondary-barrier specs, strap spacing not matching every rafter, or window impact ratings not documented. Work with your contractor or engineer to address each item; resubmission typically takes 5-7 business days. If you disagree with the rejection, North Myrtle Beach allows one appeal to the Building Official (free, in-person meeting).
Do I need to disclose a permitted retrofit to future buyers?
Yes — permitted work is part of public record (in North Myrtle Beach's permit database) and must be disclosed per South Carolina Property Disclosure Act. Unpermitted work, if discovered, is a title and financing problem. Permitted work, even 10 years old, is treated as compliant and is usually a selling point (buyers see lower insurance costs). Include a copy of the final permit and OIR-B1-1802 form in your home's records and share them with your real estate agent before listing.