What happens if you skip the permit (and you needed one)
- Stop-work order hits you with a $500–$1,500 fine and you cannot legally proceed until an after-the-fact permit and structural engineer review are completed (roughly $1,200–$3,000 extra).
- Insurance denial: homeowners policies don't cover unpermitted attached structures; if someone is injured on the deck, you face out-of-pocket liability claims that can exceed $50,000.
- Resale disclosure: South Carolina requires disclosure of unpermitted work; buyers routinely demand $10,000–$25,000 credits or walk away entirely.
- Lender/refinance block: if you try to refinance or sell to an investor, underwriting flags unpermitted decks and can kill the deal within 48 hours.
Myrtle Beach attached deck permits — the key details
Myrtle Beach Building Department applies the 2018 International Residential Code (IRC) with South Carolina amendments, and crucially, it layers on the South Carolina Coastal Construction Manual for wind uplift. That means your deck footing design must address not just vertical load but lateral uplift from wind; simple nailed connections are insufficient. IRC R507.9.2 requires a 'positive lateral load device'—in coastal zones, that's Simpson H-clips, DTT (structural tie connectors), or equivalent post-to-beam fasteners rated for the projected wind load. The Myrtle Beach permit application will ask for the deck's distance from the ocean and your elevation above mean sea level; decks within 3 miles of the shore and above elevation zones A or AE face extra scrutiny. The frost depth in Myrtle Beach is only 12 inches, which is shallower than much of South Carolina's inland piedmont (often 16–24 inches), so your footing holes don't need to go as deep—but they must still go below 12 inches. The ledger flashing detail is the single biggest rejection trigger: IRC R507.9 requires metal flashing with a kickout diverter, installed under the house rim band and over the deck joist band, sloped to shed water away from the band joist. Myrtle Beach inspectors want to see this called out explicitly on your plans, with a typical detail section or reference to a manufacturer spec sheet (e.g., Simpson LUS210 or equivalent).
The permit application workflow in Myrtle Beach is now largely digital. You can submit through the online permit portal (accessible via the City of Myrtle Beach website), but you must provide: deck layout plan (scale 1/4 inch = 1 foot), footing details showing depth, lateral load connectors, ledger flashing detail, and stair details if applicable. Once submitted, plan review takes 2–3 weeks; if there are deficiencies (missing details, undersized footings, or non-compliant flashing), the department issues a 'Request for Information' (RFI) email, and you have 10 days to resubmit. The permit fee is typically $175–$400, depending on the deck's square footage and whether it triggers structural engineer review. Decks over 500 sq ft or over 6 feet high almost always trigger a structural engineer's involvement (add $500–$1,500 to your plan-prep cost if you hire one yourself, or the city will require one and you'll pay via a third-party reviewer fee). After approval, you'll receive a permit card that must be posted visibly on site.
Inspections in Myrtle Beach follow a three-phase sequence: footing pre-pour (before concrete goes in), framing (after posts, beams, and joists are installed), and final (after decking, rails, and stairs are complete). Each inspection must be scheduled at least 48 hours in advance via the permit portal or phone. The footing pre-pour inspection is critical; the inspector will measure hole depth, verify post locations against the plan, and confirm you're using pressure-treated lumber or approved alternative (PT pine UC4B is the standard). Common failure points at footing inspection: holes too shallow, posts too close to the house, or footings poured on top of grade instead of below. The framing inspection checks ledger attachment (fasteners at 16-inch centers per IRC R507.9), joist span and spacing, and lateral load connectors. The final inspection verifies guardrail height (36 inches from deck surface to top rail), guardrail strength (no 4-inch sphere pass-through, per IBC 1015.2), stair tread depth (10–11 inches) and rise (7–7.75 inches per IRC R311.7), and deck-to-ground clearance in certain frost-related scenarios. If you're running electric to the deck (e.g., for lights or outlets), NEC Article 690 review is added, and all outdoor circuits must be 20-amp GFCI protected; that adds 1–2 weeks to review time.
South Carolina's owner-builder exemption (SC Code § 40-11-360) does allow homeowners to pull permits for their own projects without a licensed contractor, but Myrtle Beach still requires the same plan submissions and inspections; the exemption only waives the contractor-license requirement, not the permit or design-review requirement. Many homeowners mistakenly believe owner-builder means 'no permit'—it doesn't. If you hire a licensed contractor, they may pull the permit on your behalf and assume responsibility for compliance; if you pull it yourself, you are the responsible party and must be present at all inspections. HOA approval is separate from city permits; if your property is in a Myrtle Beach HOA-governed community (very common here), you must obtain HOA architectural approval before submitting to the city, and you should include a copy of the HOA approval letter with your permit application. The city will not issue a permit to a property under deed restriction if the HOA objects.
Timeline expectation: from application to final approval is 6–8 weeks if the plan is complete on first submission (2–3 weeks plan review, 2–3 weeks construction and inspections, 1–2 weeks for final walk-off). If you have to resubmit after an RFI, add 10–14 days. Decks under 200 sq ft, under 30 inches off grade, and freestanding (not attached to the house) are exempt from permitting under IRC R105.2 and do not require inspection; however, the vast majority of residential decks in Myrtle Beach are attached and therefore not exempt. Costs typically run $4,000–$15,000 for the deck build itself (materials and labor), plus $300–$800 in permit fees and plan review. Budget an extra 2–4 weeks for the permit process before you schedule construction start.
Three Myrtle Beach deck (attached to house) scenarios
Ledger flashing: why Myrtle Beach inspectors reject it more than any other detail
The single most common rejection in Myrtle Beach deck permits is insufficient or missing ledger flashing. IRC R507.9 requires metal flashing under the house rim band and over the deck's band joist, sloped to direct water away from the structure. In Myrtle Beach's humid, salt-laden coastal environment, wood rot at the rim band happens fast—sometimes within 3–5 years of exposure. The Myrtle Beach Building Department enforces a specific detail: galvanized or stainless-steel pan flashing (minimum 26 gauge), installed under the rim band's outer edge, with a kickout diverter at the bottom to push water away from the band joist. Many DIY and contractor submittals show just 'flashing per detail' without specifying the type, gauge, or kickout—automatic RFI.
The correct installation sequence is: (1) attach the ledger to the rim band with structural fasteners (lag bolts or screws) at 16-inch centers; (2) slip the pan flashing under the rim band's top edge and over the band joist's top surface; (3) attach a kickout diverter at the bottom of the flashing (typically a small bent metal shim that angles water toward the deck's drip edge, not back toward the house). The fastener spacing is crucial: IRC R507.9 requires bolts or screws no more than 16 inches apart, and the ledger must be fastened directly to the rim band of the house, not to brick veneer or cladding alone. Myrtle Beach inspectors will measure fastener spacing during the framing inspection and mark failed fasteners (outside the 16-inch tolerance). If you fail, you get 10 days to correct and reschedule.
In Myrtle Beach's salt-spray and humidity, even small gaps in the flashing create rot pathways that eat through the rim band within a few years. This is why the coastal inspection regime is so strict. If you're planning to use composite decking or synthetic materials (non-wood), the ledger still requires flashing; the ledger board itself is typically pressure-treated wood and needs protection. A common mistake: installing the flashing after the deck is complete. Inspectors will require partial deconstruction to verify flashing installation. Always install flashing during ledger attachment, before the band joist or first joist is bolted on.
Coastal wind uplift and Simpson H-clips: why they're mandatory in Myrtle Beach, not optional
Myrtle Beach's proximity to the Atlantic and its hurricane/tropical storm history mean that wind uplift—not just gravity—is a primary design load for decks. The South Carolina Coastal Construction Manual (adopted into Myrtle Beach's amendments to the 2018 IRC) requires 'positive lateral load devices' on deck beam-to-post connections within certain distance and elevation zones from the coast. A Simpson H-2.5 clip (or equivalent DTT lateral load connector) is the standard solution: it's a galvanized steel bracket that bolts through the post and beam, providing tensile resistance to uplift. Simple nailed or bolted connections can separate under wind load; the H-clip prevents that by creating a mechanical lock.
The Myrtle Beach permit application asks for the property's elevation (AEL—above mean sea level) and distance from the ocean shoreline. If you're within 3 miles and above elevation zone A, the department will specify which clips you must use based on the presumed wind load (typically 120–140 mph in hurricane zones). Your plans must call out the clip type (e.g., 'Simpson H-2.5, 5/8-inch bolts, per the South Carolina Coastal Construction Manual, Section 4.5'). Skipping this or using undersized connectors is an automatic rejection and will cause the framing inspection to fail.
The cost of H-clips is modest ($15–$40 per clip depending on size), but the installation adds rigor to your framing: you must drill through the post and beam, bolt the clip tight, and ensure the bolts are tightened with a torque wrench to specification (typically 30–40 foot-pounds). Inspectors will visually check clips are present and bolts are tight. If you're building in an area like Barefoot Landing, Calabash, or anywhere within 2 miles of the shore, expect mandatory H-clips. If you're 10+ miles inland (e.g., Conway or Socastee), the coastal overlay may not apply, but it's safer to assume it does and include them anyway. Ask the Myrtle Beach Building Department during pre-application consultation if your property is in a coastal design zone; if it is, budget for H-clips upfront.
Myrtle Beach City Hall, 3231 Mr. Joe White Avenue, Myrtle Beach, SC 29577
Phone: (843) 918-1000 (main) — ask for Building Permits or Building Services | https://www.myrtle-beach.sc.gov/ (check under Services or Permits for online portal link; most submissions now digital)
Monday–Friday, 8:00 AM – 5:00 PM (Eastern Time). Closed holidays.
Common questions
Do I need a permit if my deck is freestanding and under 200 sq ft?
Only if it's also under 30 inches above grade and not attached to the house. Under IRC R105.2, freestanding decks under 200 sq ft and under 30 inches high are exempt from permitting in Myrtle Beach. However, if your HOA has deed restrictions requiring permits for all structures, you may need HOA approval anyway. Also, if the deck is over 30 inches high or over 200 sq ft, a permit is required. Any attached deck, regardless of size, requires a permit.
What's the frost line depth in Myrtle Beach, and how deep do my footings need to go?
Myrtle Beach's frost depth is 12 inches. Your footings must go at least 4 inches below that—so a minimum of 16 inches below finished grade. In pluff-mud or sandy soil (common in Myrtle Beach), you may need deeper footings or wider pier pads to account for lower bearing capacity. Always verify soil type on your specific lot; sandy soil may require 18–24 inch footings. The footing pre-pour inspection will verify depth, so accuracy is essential.
Can I pull a permit as an owner-builder, or do I need a licensed contractor?
South Carolina law (SC Code § 40-11-360) allows owner-builders to pull residential permits without a contractor license. However, Myrtle Beach still requires the same plan submissions, inspections, and compliance standards; the owner-builder exemption only waives the contractor-license requirement. You must be present at all inspections and are responsible for code compliance. If a contractor pulls the permit on your behalf, they assume responsibility. Either way, a permit is required.
How long does plan review take, and when can I start construction?
Myrtle Beach plan review typically takes 2–3 weeks for a standard deck without electrical. If the plans are incomplete or have deficiencies, you'll receive a Request for Information (RFI) email and have 10 days to resubmit; this adds 1–2 weeks. Once approved and the permit is issued, you can legally begin construction. Do not start before you have the permit card in hand—work begun without a permit can result in a stop-work order and fines of $500–$1,500.
Do I need a structural engineer for my deck?
Not always. Decks under 200 sq ft and under 6 feet high typically pass plan review without an engineer in Myrtle Beach. However, if your deck is over 500 sq ft, over 6 feet high, or in a coastal wind zone with high load requirements, the Building Department will require a structural engineer's stamp. Pluff-mud or poor soil also often triggers engineer review due to bearing-capacity concerns. Budget $800–$1,500 for engineer review if required; many structural engineers have standard deck details that speed up the process.
What's the penalty if I skip the permit and build without one?
A stop-work order and fines of $500–$1,500, plus you'll be required to pull an after-the-fact permit and hire a structural engineer to verify compliance (adding $1,200–$3,000). Insurance won't cover unpermitted structures, so liability exposure is high. If you sell, South Carolina requires disclosure of unpermitted work, and buyers often demand $10,000–$25,000 credits or walk. Refinancing or resale to an investor can be blocked entirely.
Are there height or guardrail requirements I need to know about?
Yes. If your deck is more than 30 inches above grade, guardrails are required. Per IBC 1015.2, guardrails must be at least 36 inches high (measured from the deck surface to the top of the rail), and the balusters (vertical spindles) must not allow a 4-inch sphere to pass through. Stairs must have treads 10–11 inches deep and risers 7–7.75 inches tall. All stair landings must be at least 36 inches by 36 inches and slope 1/8 inch per foot for drainage. These are code minimums; the Myrtle Beach inspector will measure and verify compliance during final inspection.
I'm in an HOA community. Do I need HOA approval before I apply for a city permit?
Yes. Most Myrtle Beach HOA developments (very common here) require architectural approval for exterior structures. Obtain HOA approval first—this is a separate process and can take 2–4 weeks—then submit your HOA approval letter with your city permit application. If your HOA objects, the city cannot issue a permit to a property under deed restriction. Budget the HOA timeline into your project schedule upfront.
What if I want to add electrical outlets to my deck?
You'll need an NEC Article 690 review, which adds 1–2 weeks to plan review. All outdoor circuits must be on a 20-amp GFCI breaker. Outlet boxes must be wet-location rated (marine-grade), wiring must run in conduit, and boxes must be above grade (typically mounted on the deck railing or skirting). You may need a licensed electrician to pull a separate electrical permit for the rough-in inspection. Budget an extra $500–$1,000 for electrical permitting and inspection if you're adding outlets.
What materials do I need to use? Can I use composite decking?
Pressure-treated lumber (PT pine UC4B or equivalent) is the standard and most affordable. Cedar and redwood are allowed but more expensive and require more maintenance in Myrtle Beach's humid climate. Composite decking is allowed and becoming more popular; it resists rot and moisture but is more expensive upfront ($3–$5 per sq ft vs. $1–$2 for PT). The ledger must typically remain pressure-treated wood regardless of deck material, because it's anchored to the house and needs protection from moisture and salt spray. Check with your HOA—some restrict composite materials or colors.