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Permit required
HVAC replacement is a §160D-1110(c)(3) carve-out. NC’s like-kind exemption covers only electrical devices/fixtures and water-heater connections — not HVAC — so a permit is required.
Authority: NC G.S. §160D-1110(c)(3)
Confirm with: Mecklenburg County LUESA · code.mecknc.gov
Building permit rules for Charlotte NC and York County SC
This is the full reference behind the quiz — every common home project across the four Carolinas jurisdictions we cover, with the verdict, the reason, and the code section it comes from. Where a jurisdiction hasn't published a clear rule, the answer stays “check with your jurisdiction” — never a guess.
Do you need a permit in Charlotte / Mecklenburg County, NC?
| Project | Verdict | Why | Authority |
|---|---|---|---|
| Cosmetic only (paint, floors, cabinets, countertops) | Typically exempt | Cosmetic work — paint, flooring, cabinets, countertops, fixtures — needs no permit in NC. | NC G.S. §160D-1110 |
| Deck (new or rebuild) | Depends on the details | New/rebuilt structural deck needs a permit; replacing only decking boards, railings, or treads is exempt. | NC G.S. §160D-1110 |
| Detached shed / accessory building | Depends on the details | Exempt if every side is 12 ft or shorter; required if any side is longer than 12 ft. | NC G.S. §160D-1110 |
| Fence | Typically exempt | Fences don't need a building permit in NC, though local zoning height rules and HOA covenants may still apply. | NC G.S. §160D-1110 |
| Retaining wall | Depends on the details | Required at 5 ft+ or if it holds back a slope/driveway; shorter walls are generally exempt (confirm the exact trigger with LUESA). | NC G.S. §160D-1110 |
| Interior remodel — structural (move/remove walls) | Permit required | Moving or removing walls affects load-bearing structure and needs a permit in NC. | NC G.S. §160D-1110 |
| Room addition | Permit required | A room addition adds load-bearing structure, so it needs a permit in NC — the $40,000 exemption never covers load-bearing work. | NC G.S. §160D-1110 |
| Electrical panel / rewire | Permit required | Electrical panel or rewiring work is a §160D-1110 carve-out (not like-kind exempt) and needs a permit in NC. | NC G.S. §160D-1110 |
| HVAC replacement | Permit required | HVAC replacement is a §160D-1110(c)(3) carve-out. NC’s like-kind exemption covers only electrical devices/fixtures and water-heater connections — not HVAC — so a permit is required. | NC G.S. §160D-1110(c)(3) |
| Water heater replacement | Depends on the details | Exempt for a same-size, same-fuel like-for-like swap by a licensed pro; required if you resize, relocate, or change fuel. | NC G.S. §160D-1110(a)(2)/(a)(4) |
| Plumbing re-pipe / relocate | Permit required | Re-piping or relocating plumbing changes the plumbing design and needs a permit in NC. | NC G.S. §160D-1110 |
| Roof replacement (reroof) | Typically exempt | Replacing your roof covering is exempt in NC — only adding new roofing (a second layer or new roof area) needs a permit. | NC G.S. §160D-1110 |
| Window / door replacement | Typically exempt | Replacing windows and doors is explicitly allowed without a permit in NC (§160D-1110). | NC G.S. §160D-1110 |
| Exterior siding replacement | Typically exempt | Replacing exterior siding is explicitly allowed without a permit in NC (§160D-1110). | NC G.S. §160D-1110 |
| Swimming pool | Permit required | Swimming pools need a permit in NC. | NC G.S. §160D-1110 |
| Finish basement | Permit required | Finishing a basement creates habitable space and needs a permit in NC. | NC G.S. §160D-1110 |
| Driveway / sidewalk | Check with your jurisdiction | Driveways and sidewalks can trigger zoning or right-of-way review in Mecklenburg County. Confirm with the county before you start. | NC G.S. §160D-1110 |
Do you need a permit in York County, SC?
| Project | Verdict | Why | Authority |
|---|---|---|---|
| Cosmetic only (paint, floors, cabinets, countertops) | Typically exempt | Finish work — paint, paper, tile, carpet, cabinets, countertops — is exempt under R105.2 #6. | SC Residential Code 2021 §R105.2 #6 |
| Deck (new or rebuild) | Depends on the details | Exempt only if 200 sq ft or less and no more than 30 in above grade and detached and not serving the required exit door; otherwise required. | SC Residential Code 2021 §R105.2 #10 |
| Detached shed / accessory building | Depends on the details | 200 sq ft or less needs only a Zoning Compliance Application; larger than 200 sq ft needs a full permit. | York County SC — yorkcountysc.gov/598/Residential-Permits |
| Fence | Typically exempt | Fences up to 7 ft are exempt under R105.2 #2 (a taller fence needs a permit; zoning still applies). | SC Residential Code 2021 §R105.2 #2 |
| Retaining wall | Depends on the details | Exempt at 4 ft or less (footing to top) unless holding back a surcharge; taller walls need a permit. | SC Residential Code 2021 §R105.2 #3 |
| Interior remodel — structural (move/remove walls) | Permit required | Structural interior work (moving/removing walls) needs a permit. | SC Residential Code 2021 §R105.2 |
| Room addition | Permit required | A room addition enlarges the structure and needs a permit. | York County SC — yorkcountysc.gov/598/Residential-Permits |
| Electrical panel / rewire | Permit required | New, altered, or replaced electrical systems need a permit — only minor like-kind repairs are exempt under R105.2. | SC Residential Code 2021 §R105.2 |
| HVAC replacement | Permit required | Replacing mechanical (HVAC) equipment needs a permit under R105.2 — only minor like-kind repairs are exempt. | SC Residential Code 2021 §R105.2 |
| Water heater replacement | Permit required | South Carolina's plumbing exemptions are narrow, so a water-heater replacement generally needs a permit. Confirm any like-kind exemption with the county. | SC Residential Code 2021 §R105.2 |
| Plumbing re-pipe / relocate | Permit required | Altering or extending plumbing systems needs a permit under R105.2. | SC Residential Code 2021 §R105.2 |
| Roof replacement (reroof) | Permit required | South Carolina treats a reroof as a repair/alteration of the structure and it is not on the R105.2 exempt list, so York County requires a permit. | York County SC — yorkcountysc.gov/598/Residential-Permits |
| Window / door replacement | Permit required | South Carolina generally requires a permit to replace windows and doors. York County may treat some like-kind swaps as minor, so confirm with the county before relying on an exemption. | York County SC — yorkcountysc.gov/598/Residential-Permits |
| Exterior siding replacement | Permit required | South Carolina generally requires a permit to replace exterior siding. Confirm with the county before relying on an exemption. | York County SC — yorkcountysc.gov/598/Residential-Permits |
| Swimming pool | Permit required | Pools need a permit — only a prefab pool less than 24 inches deep is exempt under R105.2 #7. | SC Residential Code 2021 §R105.2 #7 |
| Finish basement | Permit required | Finishing a basement creates habitable space and needs a permit. | SC Residential Code 2021 §R105.2 |
| Driveway / sidewalk | Typically exempt | Sidewalks and driveways are exempt from a building permit under R105.2 #5 (zoning/right-of-way rules may still apply). | SC Residential Code 2021 §R105.2 #5 |
Do you need a permit in Rock Hill, SC?
| Project | Verdict | Why | Authority |
|---|---|---|---|
| Cosmetic only (paint, floors, cabinets, countertops) | Typically exempt | Cosmetic finish work is exempt under R105.2 #6. | SC Residential Code 2021 §R105.2 #6 |
| Deck (new or rebuild) | Permit required | Rock Hill requires a permit for decks. | Rock Hill SC — Planning & Development |
| Detached shed / accessory building | Check with your jurisdiction | Rock Hill runs a special process for accessory structures of 200 sq ft or less, and sources conflict on whether a permit or a zoning review applies. Confirm with the city before you build. | Rock Hill SC — Planning & Development |
| Fence | Permit required | Rock Hill lists fences among the work that requires a permit. | Rock Hill SC — Planning & Development |
| Retaining wall | Permit required | Rock Hill permits retaining walls separately. | Rock Hill SC — Planning & Development |
| Interior remodel — structural (move/remove walls) | Permit required | Structural interior work (moving/removing walls) needs a permit. | Rock Hill SC — Planning & Development |
| Room addition | Permit required | A room addition enlarges the structure and needs a permit. | Rock Hill SC — Planning & Development |
| Electrical panel / rewire | Permit required | New, altered, or replaced electrical systems need a permit under R105.2. | Rock Hill SC — Planning & Development |
| HVAC replacement | Permit required | Replacing mechanical (HVAC) equipment needs a permit under R105.2. | Rock Hill SC — Planning & Development |
| Water heater replacement | Permit required | A water-heater replacement generally needs a permit in Rock Hill. Confirm any like-kind exemption with the city. | Rock Hill SC — Planning & Development |
| Plumbing re-pipe / relocate | Permit required | Altering or extending plumbing systems needs a permit under R105.2. | Rock Hill SC — Planning & Development |
| Roof replacement (reroof) | Permit required | Rock Hill requires a permit for reroofing. | Rock Hill SC — Planning & Development |
| Window / door replacement | Permit required | Rock Hill requires a permit for window and door replacement. | Rock Hill SC — Planning & Development |
| Exterior siding replacement | Permit required | Rock Hill requires a permit for exterior siding replacement. | Rock Hill SC — Planning & Development |
| Swimming pool | Permit required | Swimming pools need a permit in Rock Hill. | Rock Hill SC — Planning & Development |
| Finish basement | Permit required | Finishing a basement creates habitable space and needs a permit. | Rock Hill SC — Planning & Development |
| Driveway / sidewalk | Check with your jurisdiction | Rock Hill may require right-of-way or zoning review for driveways. Confirm with the city before you start. | Rock Hill SC — Planning & Development |
Do you need a permit in Fort Mill, SC?
| Project | Verdict | Why | Authority |
|---|---|---|---|
| Cosmetic only (paint, floors, cabinets, countertops) | Typically exempt | Cosmetic finish work is exempt under R105.2 #6. | SC Residential Code 2021 §R105.2 #6 |
| Deck (new or rebuild) | Permit required | Fort Mill requires a permit for decks and publishes no exemption list, so confirm the specifics with the town. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Detached shed / accessory building | Permit required | Fort Mill requires a permit for accessory buildings and publishes no exemption list, so confirm any small-shed exemption with the town. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Fence | Check with your jurisdiction | Fort Mill publishes no exemption list for fences, so we can’t confirm a verdict. Confirm with the town before you start. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Retaining wall | Check with your jurisdiction | Fort Mill publishes no exemption list for retaining walls. Confirm the trigger with the town before you start. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Interior remodel — structural (move/remove walls) | Permit required | Structural interior work (moving/removing walls) needs a permit. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Room addition | Permit required | A room addition enlarges the structure and needs a permit. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Electrical panel / rewire | Permit required | New, altered, or replaced electrical systems need a permit under R105.2. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| HVAC replacement | Permit required | Replacing mechanical (HVAC) equipment needs a permit under R105.2. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Water heater replacement | Permit required | A water-heater replacement generally needs a permit in Fort Mill. Confirm any like-kind exemption with the town. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Plumbing re-pipe / relocate | Permit required | Altering or extending plumbing systems needs a permit under R105.2. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Roof replacement (reroof) | Permit required | Fort Mill requires permits for roofing work and publishes no exemption list, so confirm the specifics with the town. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Window / door replacement | Check with your jurisdiction | Fort Mill publishes no exemption list for window or door replacement, so we can’t confirm a verdict. Call the town’s Building & Codes office before you start. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Exterior siding replacement | Check with your jurisdiction | Fort Mill publishes no exemption list for siding replacement, so we can’t confirm a verdict. Confirm with the town before you start. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Swimming pool | Permit required | Swimming pools need a permit in Fort Mill. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Finish basement | Permit required | Finishing a basement creates habitable space and needs a permit. | Fort Mill SC — fortmillsc.gov/396/Permitting |
| Driveway / sidewalk | Check with your jurisdiction | Fort Mill publishes no exemption list, so confirm driveway/sidewalk requirements with the town. | Fort Mill SC — fortmillsc.gov/396/Permitting |
NC vs SC: the permit rules that differ
Most of the confusion homeowners run into is that North Carolina and South Carolina treat the same project differently. The big divergences:
- Roof replacement (reroof): no permit in Charlotte / Mecklenburg — NC exempts a like-for-like roof-covering replacement — but York County and the SC cities require one (a reroof isn't on the SC R105.2 exempt list).
- Window, door & siding replacement: explicitly exempt in NC (§160D-1110), but generally permitted in South Carolina.
- NC's $40,000 rule is not a blanket pass: load-bearing work, MEP redesign (HVAC, electrical panels, plumbing design changes), and adding roofing still need a permit under §160D-1110 even below $40k.
Think work was already done without a permit? Check your Mecklenburg County permit history →