South Carolina · HVAC
AC Replacement cost in South Carolina
Statewide pricing, permit posture and inspection sequence for ac replacement in South Carolina. Your city or county issues the actual permit — use the local links below to confirm fees.
Verified August 2026
AC Replacement cost in South Carolina
$4,800 – $14,300
Most South Carolina homeowners pay around $8,200, or $1,450–$2,950 per ton of cooling capacity. Permit fees typically add $80–$290.
Permit: Yes. South Carolina Residential Code, based on the IRC
Cost breakdown
| Budget scope | $4,800 |
|---|---|
| Typical project | $8,200 |
| Premium / complex | $14,300 |
| per ton of cooling capacity | $1,450 – $2,950 |
| Permit fees | $80 – $290 |
| vs national baseline | -8% |
| Timeline | 1 day of work, 1-3 weeks including permit and inspection |
What is different about ac replacement in South Carolina
Charleston and Horry County enforce coastal wind and elevation rules plus historic review; upstate Greenville prices and permits like the interior Southeast.
Owner-builder: Homeowner permits allowed on owner-occupied property. AC Replacement generally requires a licensed contractor to pull the permit, even where owner-builder status is available.
Inspections
- Mechanical rough / equipment set
- Electrical disconnect
- Final mechanical inspection
What drives the price
- System size in tons and SEER2 efficiency rating
- Heat pump versus straight cool with electric heat
- Air handler location (attic, closet, garage)
- Duct condition and any required duct replacement
- Electrical upgrades and new disconnect
Frequently asked questions
Do I need a permit to replace an AC unit?
Yes. A mechanical permit is required for a residential air conditioner changeout in every Florida jurisdiction, and the work must be inspected. Licensed HVAC contractors pull this permit as part of the job.
What size AC do I need in Florida?
A rough Florida rule of thumb is one ton of cooling per 500-600 square feet of conditioned space, but proper sizing uses a Manual J load calculation that accounts for insulation, window area, orientation and ceiling height. Oversized systems short-cycle and fail to remove humidity.
How long does an AC last in Florida?
Because systems run nearly year-round and coastal salt air accelerates corrosion, Florida air conditioners typically last 10-15 years versus 15-20 in cooler climates.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.