Do You Need a Permit for HVAC Work in Horry County?

Short answer: for most HVAC replacements in Horry County and the Grand Strand municipalities, yes — a permit and inspection are required. For simple repairs, usually not. The distinction matters, and it matters for reasons that protect you, not just the county's paperwork flow.

Disclaimer: permit rules vary by jurisdiction (unincorporated Horry County vs. Myrtle Beach vs. North Myrtle Beach vs. Surfside Beach, etc.) and change over time. What's below is the general landscape — your contractor should verify current requirements with the specific building department for your address.

Which jobs typically need a permit

• Full system replacement (outdoor unit + indoor unit): almost always. This is the big one.
• New installations where none existed: always — new ductwork, new electrical, new equipment.
• Fuel conversions (e.g., electric to gas): yes, plus gas-line permits.
• Significant ductwork modifications: often, depending on scope.

Which jobs typically don't: like-for-like repairs (capacitor, contactor, motor replacement), thermostat swaps, filter and maintenance work, and refrigerant service on existing equipment. When in doubt, the building department answers the question for free.

Why the permit protects YOU

Homeowners sometimes see permits as the contractor's hassle. Flip it around — the permit buys you:

• An independent inspection. A county or city inspector verifies the installation meets mechanical code: proper electrical, correct clearances, condensate drainage, refrigerant line protection. It's a second set of expert eyes you don't pay extra for.
• Warranty protection. Some manufacturers can deny claims on improperly installed equipment. Permitted, inspected installs document that the work met code.
• Insurance coverage. If an unpermitted installation causes damage (electrical fire, water damage), your homeowner's insurer may balk at the claim.
• Resale smoothness. Unpermitted HVAC work surfaces in buyer inspections and can delay or derail a sale — particularly relevant in our transaction-heavy market.

How legitimate contractors handle permits

Expect this: the contractor pulls the permit (in their name, as the licensed installer), includes the permit fee in your quote as a line item, schedules the inspection, and is present for it. The whole process typically adds days, not weeks, to a replacement timeline.

The red flag: a contractor who suggests skipping the permit "to save you money," or asks you to pull a homeowner permit for their commercial work. Both signal someone operating outside the system — ask yourself what else they're skipping.

What about the license?

South Carolina requires HVAC contractors to hold a mechanical contractor's license from the SC Department of Labor, Licensing and Regulation for work above certain thresholds. Before hiring anyone for a replacement, verify the license is current — it's public record. A legitimate contractor provides the license number without hesitation; it's also required on their advertising and contracts.

Note: always verify any specific license number independently through the state's official lookup rather than taking it at face value.

What the inspection actually checks

Knowing what the inspector looks for explains why the process protects you. A typical mechanical inspection for a replacement covers:

• Electrical: proper breaker sizing, disconnect within sight of the unit, correct wiring gauge, grounding. Electrical faults are a leading cause of HVAC-related fires — this check matters.
• Clearances: manufacturer-required service clearances around indoor and outdoor units. Crammed installations overheat and can't be serviced.
• Condensate drainage: proper slope, secondary drain or float switch where required (so a clog shuts the system down instead of flooding your ceiling).
• Refrigerant lines: protected where exposed, properly insulated, correct sizing.
• Combustion safety (gas systems): venting, clearances to combustibles, carbon monoxide considerations.
• Refrigerant handling documentation: the installer should be EPA-certified; inspectors can ask.

None of this is adversarial — inspectors want safe installations, and good contractors welcome the verification. If your installer seems nervous about the inspection, that's information.

What if the inspector flags something?

It happens, and it's not a disaster — it's the system working. The inspector issues a correction notice, the contractor fixes the item, and the inspection is re-done. This is precisely why you want a permitted job: the problem gets caught and corrected while the installer is still responsible, instead of surfacing years later as your problem alone. Never let a contractor talk you into skipping the re-inspection.