Average AC Unit Installation Cost in South Carolina
$4,190
Low End
$2,521
Average
$4,190
High End
$5,818
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Use our free HVAC calculatorHere's how ac unit installation costs typically break down in South Carolina:
AC Unit Installation in South Carolina is 25% below the national average of $5,593. This makes South Carolina one of the more affordable states for ac unit installation.
South Carolina experiences a humid subtropical climate with long, hot, humid summers and short, mild winters. Construction runs year-round, but the Lowcountry from Charleston to Hilton Head faces full hurricane exposure, and the state's distinctive expansive marine clays drive foundation engineering costs along the coastal plain. For ac unit installation projects specifically, this means timing and material selection are key factors in both cost and quality.
Less regulatory burden and simpler permitting processes help keep overall project costs down.
South Carolina Residential Builders Commission licenses residential builders for jobs over $5,000 (specialty contractors registered separately), verify at llr.sc.gov
Duke Energy Carolinas, Dominion Energy SC, and Santee Cooper run active 2026 rebates for heat pumps, weatherization, and smart thermostats
Charleston and Beaufort County sit in high-wind zones with OCRM critical-area rules, verify wind-rated product listings and setback requirements early
Historic district review in Charleston (Board of Architectural Review) is among the strictest in the country, expect extended permit timelines for any exterior change
Most ac unit installation projects in South Carolina require a building permit, especially if structural changes are involved. Estimated permit cost: $115.
View full permit guide for South CarolinaShare your project once and we'll send it to up to 3 verified ac-installation pros in your area. Free for you, free for them. Never shared with more than 3, and never with anyone we have not verified.
AC Unit Installation in South Carolina typically costs between $2,521 and $5,818, with an average of $4,190 for a typical project in 2026.
No, ac unit installation in South Carolina is about 25% below the national average, making it more affordable than many other states.
Permit requirements vary by city and county in South Carolina. Most ac unit installation projects that involve structural changes require a building permit. Check our permit guide for South Carolina for specific requirements.
A typical ac unit installation project takes 2-7 days depending on the scope, weather conditions, and contractor availability in your area.
Get at least 3 quotes from licensed contractors, consider scheduling during off-peak seasons (fall/winter), ask about financing options, and make sure to compare material options as they significantly affect the total cost.
Cost estimates are based on publicly available data and industry averages for South Carolina. Actual costs vary significantly based on project specifics, contractor pricing, material choices, and local market conditions. These estimates are for informational purposes only. Always get multiple quotes from licensed contractors.