Local research · updated July 2026
Replacement Windows in Gulfport, Mississippi
Gulfport anchors the Mississippi Gulf Coast with Biloxi — hurricanes, extreme salt and humidity, and a Katrina legacy that still shapes how openings are specified. Of the city's housing units, 44.1% predate 1980 and the median year built is 1986. Harrison County is ENERGY STAR Southern / IECC 2A: low SHGC for cooling plus impact or shutters where coastal wind maps require them. This page covers the Gulfport–Biloxi coastal market, not only Gulfport city limits.
Short answer
In Gulfport, a standard replacement window (double-hung, casement or slider) typically costs $505–$2,865 installed. Bay and bow windows run $2,520–$8,060+, and a sliding patio door $1,510–$5,035. 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 Gulfport with the BEA Regional Price Parity for Gulfport-Biloxi, MS (2024). How we estimate →
44.1%
of Gulfport 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
1986
median year built across Gulfport's 33,175 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 Southern zone
Source: EPA ENERGY STAR v7.0
Window installers in Gulfport
Compare companies serving Gulfport. 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 | Pensacola, FL | Get a quote → |
| 1Window World of Southern MississippiWindow World | Gulfport, MS | Get matched → |
Renewal by Andersen of the Gulf Coast
4.8 · 200,000+ reviewsPensacola, FL showroom · serving the Gulfport 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 Gulfport homeowners directly.
What drives window decisions in Gulfport
- Southern / 2A: U ≤ 0.32, SHGC ≤ 0.23; SHGC owns cooling bills.
- Hurricane / WBDR coastal exposure: impact glazing or approved shutters where mapped.
- Katrina legacy and casino-coast rebuild stock mixed with older homes.
- MS utilities thin for window rebates; MDA IRA pending; 25C expired.
Replacement windows & doors by type in Gulfport
Local cost ranges and Southern-zone efficiency guidance for each window and door style, specific to Gulfport homes:
Ranges localized to Gulfport's cost level: national planning ranges shifted by the BEA Regional Price Parity for Gulfport-Biloxi, MS (90, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Gulfport's climate
Gulfport sits in the ENERGY STAR Southern zone (IECC zone 2A (hot, humid), Harrison County). Under the v7.0 specification, qualifying windows need a U-factor of 0.32 or lower and an SHGC of 0.23 or lower. Cooling-dominated climate: the priority is keeping solar heat out — a low SHGC saves more than an ultra-low U-factor here.
Not sure what these numbers mean? Read our plain-English guide to U-factor and SHGC.
What replacement windows cost here
Coastal impact packages cost more than inland Mississippi standard glass. Itemize product approval, DP rating, labor, and permit. Federal 25C is gone; MS window rebates are not reliable. Payback is storm resilience and cooling savings.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in Mississippi
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.
Mississippi's IRA Home Energy Rebates are administered through the Mississippi Development Authority Office of Energy (Energy & Natural Resources). As of mid-2026 consumer-facing HOMES/HEAR pathways were not clearly open for standard single-family window projects — treat status as pending and confirm at mississippi.org / MDA Office of Energy before promising rebate money. Windows would generally fit only inside a whole-home modeled-savings track when programs launch, not as a retail per-window check.
- Entergy Mississippi / Mississippi Power efficiency programs. Investor-owned utilities in Mississippi run residential efficiency programs that typically emphasize HVAC, weatherization, and equipment rather than a standalone window replacement rebate. Availability and measure lists change — confirm current offers with your electric utility. Do not count on a simple per-window utility check. (Entergy Mississippi; Mississippi Power residential efficiency pages; MDA Office of Energy)
Mississippi has historically had limited statewide residential energy-code stringency relative to many states — confirm the edition enforced by your local building official. Most of the state is IECC climate zone 3A (warm, moist); ENERGY STAR South-Central targets for replacement windows are a U-factor of 0.28 or lower and an SHGC of 0.23 or lower under Version 7.0.
Replacement windows in nearby metros
Not in Gulfport proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Gulfport window replacement FAQ
›Do Gulf Coast MS windows have to be impact-rated?
Often yes on mapped coastal wind-borne debris parcels — or approved shutters. Confirm your address with the local building official and current wind maps. Ask for product approval numbers.
›What efficiency numbers should windows hit?
ENERGY STAR Southern: U-factor 0.32 or lower and SHGC 0.23 or lower. Also confirm design-pressure ratings for your zone.
›Are there rebates?
Federal 25C expired December 31, 2025. MDA Office of Energy IRA and utility programs — confirm current status. Do not count on a simple per-window check.
›Does this page cover Biloxi too?
Yes in market terms — same coastal climate and code family — but permits are local. Use the building department for your city or unincorporated Harrison County address.
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 New Orleans/Mobile; NHC Katrina and subsequent storm reports; Mississippi coastal building maps
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)