Replacement Windows in South Carolina

Rebates & incentives

The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.

South Carolina's IRA Home Energy Rebates are administered by the South Carolina Energy Office (within the Office of Regulatory Staff); the HOMES and HEAR allocations are approved but, as of mid-2026, the consumer-facing programs had not launched, with the Energy Office still finalizing software and contractor enrollment after repeated delays. Windows generally qualify only through the whole-home HOMES modeled-savings track rather than as a standalone item. Confirm current status with the SC Energy Office before promising rebates.

• Duke Energy Smart $aver window rebate. Duke Energy's residential Smart $aver program offers an energy-efficient window rebate that does reach Duke's South Carolina customers, but only for homes with whole-home electric heating (heat pump, electric furnace, or radiant electric), on complete window replacements with air sealing, capped at 13 windows per home. (Duke Energy Smart $aver (duke-energy.com))
• Dominion Energy South Carolina EnergyWise. Dominion Energy South Carolina's residential EnergyWise program rebates heat pumps, central AC, ductwork, and heat pump water heaters but does not offer a standalone replacement-window rebate; window help is generally limited to its income-qualified weatherization offering. (Dominion Energy South Carolina (dominionenergy.com))

Energy code

South Carolina's residential energy code has lagged, remaining based on the 2009 IECC with state amendments, so code-minimum window U-factors are dated; Charleston and Columbia permitting runs through local building departments, and the hot-humid IECC zone 3A climate makes solar heat gain coefficient (SHGC) as important as U-factor for replacement windows.

Local market research in South Carolina

• Replacement windows in Charleston, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Columbia, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Greenville, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Myrtle Beach, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Spartanburg, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Hilton Head Island, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Florence, SC covers costs, codes, rebates, and local FAQs.
• Replacement windows in Anderson, SC covers costs, codes, rebates, and local FAQs.