Local research · updated July 2026
Replacement Windows in Spartanburg, South Carolina
Spartanburg sits in South Carolina's Upstate near Greenville — humid subtropical weather, ice storms, textile-era stock, and BMW-plant-era growth. Of the city's housing units, 69.8% predate 1980 and the median year built is 1969. Spartanburg County is ENERGY STAR South-Central / IECC 3A: low SHGC for cooling with enough winter for a real U-factor. Replacement here is humidity and seal failures — not Grand Strand hurricane code.
Short answer
In Spartanburg, a standard replacement window (double-hung, casement or slider) typically costs $510–$2,900 installed. Bay and bow windows run $2,550–$8,160+, and a sliding patio door $1,530–$5,095. 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 Spartanburg with the BEA Regional Price Parity for Spartanburg, SC (2024). How we estimate →
69.8%
of Spartanburg 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
1969
median year built across Spartanburg's 17,586 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 Spartanburg
Compare companies serving Spartanburg. 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 | Duncan, SC | Get a quote → |
| 1Champion Window Siding & PatioChampion | Greenville, SC | Get matched → |
| 2Pella Windows and Doors Showroom of Greenville, SCPella | Greenville, SC | Get matched → |
| 3Window NationWindow Nation | Greenville, SC | Get matched → |
| 4Window World of UpstateWindow World | Greenville, SC | Get matched → |
Renewal by Andersen of the Carolinas-Duncan
4.8 · 200,000+ reviewsDuncan, SC showroom · serving the Spartanburg 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 Spartanburg homeowners directly.
What drives window decisions in Spartanburg
- South-Central / 3A: U ≤ 0.28, SHGC ≤ 0.23 under ENERGY STAR v7.0.
- Textile-era core plus industrial growth suburbs: two different job types.
- Ice storms and severe thunderstorms stress openings.
- SC Duke Smart $aver with strings; 25C expired.
Replacement windows & doors by type in Spartanburg
Local cost ranges and South-Central-zone efficiency guidance for each window and door style, specific to Spartanburg homes:
Ranges localized to Spartanburg's cost level: national planning ranges shifted by the BEA Regional Price Parity for Spartanburg, SC (91.1, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Spartanburg's climate
Spartanburg sits in the ENERGY STAR South-Central zone (IECC zone 3A (warm, moist), Spartanburg 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
Upstate pricing is generally moderate and competitive. Itemize glass package and permit. Federal 25C is gone; Duke Smart $aver may apply with eligibility strings.
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 Spartanburg proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Spartanburg window replacement FAQ
›Do I need a permit to replace windows in Spartanburg?
Usually yes for full replacement. City or county building codes depending on address. Confirm the installer pulls the correct 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. Read the NFRC label.
›Are there rebates?
Federal 25C expired December 31, 2025. Duke Smart $aver and SC efficiency programs may help with strings. Confirm paperwork yourself.
›How is Spartanburg different from Myrtle Beach?
Inland Upstate 3A humidity vs coastal Grand Strand wind and salt. Impact and salt-air hardware matter more on the coast; ice storms and textile-era stock matter more here.
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 Greenville-Spartanburg; NOAA climate normals
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)