Local research · updated July 2026
Replacement Windows in Hilton Head Island, South Carolina
Hilton Head Island is a Lowcountry resort barrier island — hurricanes, wind-borne debris rules, salt air, and a large share of second-home and relatively newer stock. About 23.8% of homes predate 1980 and the median year built is 1987 — comparatively young growth/resort stock, so many jobs are failed dual-pane seals rather than century-old sash restoration. Beaufort County is ENERGY STAR South-Central / IECC 3A (warm, moist coastal — not inland Piedmont alone): low SHGC for cooling plus impact or shutters where wind maps require them. Frame resort stock honestly: many jobs are salt corrosion and failed dual-pane seals, not rope-and-pulley restoration.
Short answer
In Hilton Head Island, a standard replacement window (double-hung, casement or slider) typically costs $550–$3,120 installed. Bay and bow windows run $2,745–$8,775+, and a sliding patio door $1,645–$5,485. Frame material and the glass package decide where a project lands in that range.
Planning ranges built from NREL and BLS cost data, localized to Hilton Head Island with the BEA Regional Price Parity for Hilton Head Island-Bluffton-Port Royal, SC (2024). How we estimate →
23.8%
of Hilton Head Island homes were built before 1980, the era of single-pane and early aluminum windows
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
1987
median year built across Hilton Head Island's 30,265 housing units
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
SHGC ≤ 0.23
the ENERGY STAR v7.0 number that matters most in the South-Central zone
Source: EPA ENERGY STAR v7.0
Window installers in Hilton Head Island
Compare companies serving Hilton Head Island. Request a free, no-obligation quote and we route it to the company or a vetted local installer.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Summerville, SC | Get a quote → |
| 1Champion Replacement Windows of SavannahChampion | Savannah, GA | Get matched → |
| 2Pella Windows and Doors Showroom of Bluffton, SCPella | Bluffton, SC | Get matched → |
| 3Window World of SavannahWindow World | Pooler, GA | Get matched → |
Renewal by Andersen of Charleston-Hilton Head, SC (446)
4.8 · 200,000+ reviewsSummerville, SC showroom · serving the Hilton Head Island metro
Full-service manufacturer and installer, transferable warranty, local crews. Why it's our Top Pick
Get a quote →Listings compiled from manufacturer dealer locators and public business records. Premier and Sponsored Partners pay for placement and are labeled as such; star ratings shown are reported by the partner, with the source and date beside them. See our advertising disclosure. Contacting a company shares your details with it (or a vetted local installer) so it can reach you about your project.
Are you a window company? Claim your listing to take quote requests from Hilton Head Island homeowners directly.
What drives window decisions in Hilton Head Island
- South-Central / 3A coastal: U ≤ 0.28, SHGC ≤ 0.23; confirm WBDR/impact by parcel.
- Resort / second-home stock (ACS median ~1987, ~24% pre-1980): salt air and hurricane wind define hardware and structural ratings.
- Barrier-island flood and surge risk is parcel-specific — check FEMA maps.
- South Carolina utility / IRA pathways when live; 25C expired.
Replacement windows & doors by type in Hilton Head Island
Local cost ranges and South-Central-zone efficiency guidance for each window and door style, specific to Hilton Head Island homes:
Ranges localized to Hilton Head Island's cost level: national planning ranges shifted by the BEA Regional Price Parity for Hilton Head Island-Bluffton-Port Royal, SC (98, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Hilton Head Island's climate
Hilton Head Island sits in the ENERGY STAR South-Central zone (IECC zone 3A (warm, moist), Beaufort County). Under the v7.0 specification, qualifying windows need a U-factor of 0.28 or lower and an SHGC of 0.23 or lower. Cooling-leaning climate: blocking solar heat gain (low SHGC) matters as much as insulation.
Not sure what these numbers mean? Read our plain-English guide to U-factor and SHGC.
What replacement windows cost here
Resort-island coastal packages cost more when impact ratings apply. Labor and HOA design rules can add cost and lead time. Federal 25C is gone. Payback is storm resilience, insurance credits where available, and cooling savings.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in South Carolina
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))
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.
Replacement windows in nearby metros
Not in Hilton Head Island proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Hilton Head Island window replacement FAQ
›Do I need a permit to replace windows on Hilton Head?
Usually yes for full replacement. Town of Hilton Head Island Community Development or Beaufort County for some addresses. HOAs may add design review. Confirm the installer pulls the permit.
›What efficiency numbers should windows hit?
ENERGY STAR South-Central and IECC 3A: U-factor 0.28 or lower and SHGC 0.23 or lower, plus structural ratings for your wind zone. Read NFRC and approval labels separately.
›Are there rebates?
Federal 25C expired December 31, 2025. Check South Carolina utility programs and state IRA status. Insurance wind-mitigation credits can matter more than rebates on the coast.
›My condo is relatively new — still replace?
Resort stock still fails: seals die and builder-grade hardware corrodes in salt air. If glass is sound, sealed, and already impact-rated to code, replacement may not be needed — verify with an inspection.
Sources
- — U.S. Census Bureau, American Community Survey 5-Year Estimates (B25034, B25035)
- — EPA ENERGY STAR Version 7.0 Residential Windows specification
- — DOE/PNNL IECC climate zone assignments by county
- — NWS Charleston; NHC tropical cyclone materials; FEMA flood maps
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)