Local research · updated July 2026
Replacement Windows in Green Bay, Wisconsin
Green Bay is a mid-age northern market sitting in a genuinely cold spot. Two-thirds of the city's homes — 66.8% — predate 1980, and the median build year is 1971, which puts the typical Green Bay house squarely in the early-1970s era of aging aluminum and first-generation double-pane units now well past the life of their seals. The city wraps the head of the bay of Lake Michigan in IECC Zone 6A, one of the colder markets we cover, where long winters and wind coming straight off the water make heat retention the whole point of a replacement. This is Packers country, and the housing is much like the team's reputation — solid, unglamorous, and built to take a Wisconsin winter — but a 1971 window no longer holds up its end of that bargain.
Short answer
In Green Bay, a standard replacement window (double-hung, casement or slider) typically costs $520–$2,965 installed. Bay and bow windows run $2,605–$8,335+, and a sliding patio door $1,565–$5,210. 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 Green Bay with the BEA Regional Price Parity for Green Bay, WI (2024). How we estimate →
66.8%
of Green Bay 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
1971
median year built across Green Bay's 45,797 housing units
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
U ≤ 0.22
the ENERGY STAR v7.0 number that matters most in the Northern zone
Source: EPA ENERGY STAR v7.0
Window installers in Green Bay
Compare companies serving Green Bay. 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 | Appleton, WI | Get a quote → |
| 1Feldco Windows, Siding, Doors & Roofing of Green BayFeldco | Menasha, WI | Get matched → |
| 2Mad City Windows & Baths of Green BayMad City Windows | Neenah, WI | Get matched → |
| 3Pella Windows and Doors Showroom of De Pere, WIPella | De Pere, WI | Get matched → |
| 4Universal Windows DirectUniversal Windows Direct | De Pere, WI | Get matched → |
| 5Window NationWindow Nation | Kaukauna, WI | Get matched → |
| 6Window World of Green BayWindow World | Green Bay, WI | Get matched → |
Renewal by Andersen of Greater Wisconsin
4.8 · 200,000+ reviewsAppleton, WI showroom · serving the Green Bay 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 Green Bay homeowners directly.
What drives window decisions in Green Bay
- The stock clusters around a 1971 median: mostly postwar and early-1970s ranches and split-levels carrying original aluminum or early double-pane sashes whose seals have long since failed, showing up as fogged glass between the panes and drafts at the frame. This is a swap-out market more than a historic-restoration one — the typical job is replacing tired mid-century units, not preserving prewar wood.
- Zone 6A makes low U-factor the dominant spec. In a Green Bay winter, heat retention matters far more than solar control, and triple-pane glass packages — which push U-factors below the usual double-pane range — are increasingly treated as standard rather than an upgrade on the cold side of a replacement.
- The bay location adds its own load: wind off Lake Michigan, lake-effect snow, and hard freeze-thaw cycling drive interior condensation and ice at the sill on any window that can't keep its interior glass surface warm — among the most common triggers homeowners here cite for replacing rather than repairing.
- Residential work falls under the Wisconsin Uniform Dwelling Code (UDC), the statewide code for one- and two-family homes, and Green Bay sits in what national installers like Renewal by Andersen market as their 'Greater Wisconsin' service territory, so most homeowners are choosing among regional and national brands rather than a purely local trade.
Replacement windows & doors by type in Green Bay
Local cost ranges and Northern-zone efficiency guidance for each window and door style, specific to Green Bay homes:
Ranges localized to Green Bay's cost level: national planning ranges shifted by the BEA Regional Price Parity for Green Bay, WI (93.1, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Green Bay's climate
Green Bay sits in the ENERGY STAR Northern zone (IECC zone 6A (cold, moist), Brown County). Under the v7.0 specification, qualifying windows need a U-factor of 0.22 or lower with a solar heat gain coefficient (SHGC) of at least 0.17. Heating-dominated climate: the window must hold heat in (very low U-factor) while still letting some free solar warmth through in winter (minimum SHGC). Equivalent-performance tradeoffs allow U-factors of 0.23–0.26 when paired with progressively higher solar gain.
Not sure what these numbers mean? Read our plain-English guide to U-factor and SHGC.
What replacement windows cost here
Green Bay's 1971-median stock keeps the cost story simpler than in a prewar market. Most homes have standard-sized postwar and early-1970s openings, and where those openings are square and sound an insert (pocket) replacement is often all that's warranted — the cheaper path. The cost pressure here comes from the glass, not the carpentry: Zone 6A rewards low-U-factor double-pane and, increasingly, triple-pane packages, which add material cost up front but are exactly where the heating-season savings live. Midwest labor rates tend to sit near or modestly below national averages. Note a local quirk on permitting — a straight same-size window swap in Green Bay generally does not require a building permit (see below), which removes one line item some other cities add. Get itemized bids that separate the window unit from labor and any frame or trim repair, and ask specifically whether triple-pane is worth the upcharge for your exposure.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in Wisconsin
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.
Wisconsin has been rolling out IRA Home Energy Rebate programs; whole-home efficiency retrofits can include windows within a modeled-savings project. Confirm current availability before promising rebate dollars.
- Focus on Energy (statewide). Focus on Energy is Wisconsin's statewide utility efficiency program; it incentivizes audits and weatherization, with windows typically part of a broader whole-home efficiency package. (Focus on Energy program pages)
Wisconsin enforces the statewide Uniform Dwelling Code (UDC); Milwaukee permits through the Department of Neighborhood Services. Zone 6 winters make low U-factor windows effectively essential for permitted replacements.
Replacement windows in nearby metros
Not in Green Bay proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Green Bay window replacement FAQ
›Do I need a permit to replace windows in Green Bay?
Often not, but it depends on scope. The City of Green Bay administers building permits through its Community and Economic Development department, and residential work is governed by the Wisconsin Uniform Dwelling Code. For window projects, the city's guidance is that a permit is generally required only if you are changing the size of an existing opening or adding a new window — a straightforward replacement within the same opening typically does not need one. Enlarging or relocating an opening brings in structural and egress considerations and does require a permit. Confirm your specific project with Building Inspection before work starts (inspections are scheduled at least one business day ahead), and a reputable installer will handle any permit that is needed as part of the job.
›What efficiency numbers should replacement windows hit in Green Bay?
Green Bay is in the ENERGY STAR Northern climate zone (IECC Zone 6A). The ENERGY STAR Version 7.0 Northern spec calls for a U-factor of 0.22 or lower and a solar heat gain coefficient of at least 0.17 — the SHGC floor is deliberate, because in a heating-dominated climate you actually want to let some free winter solar gain in rather than block it. In practice the low U-factor is the number that counts most here, and triple-pane units, which drop well below the double-pane range, are increasingly common on Green Bay replacements for exactly that reason. Ask to see the NFRC label on any unit you're quoted rather than trusting a brochure claim.
›Are there rebates or tax credits for windows in Wisconsin right now?
The picture has changed. The federal 25C energy-efficient home improvement tax credit for windows expired on December 31, 2025, so it is no longer available for new projects. At the state level, be careful with claims about Focus on Energy, Wisconsin's statewide utility-funded efficiency program: it does not offer a standalone rebate just for swapping windows. Windows can instead count as one measure inside Wisconsin's IRA-funded Home Energy Rebates — the whole-home HOMES program, administered with Focus on Energy — which requires an energy assessment and pays out on modeled or measured whole-house energy savings rather than on the windows alone. Wisconsin Public Service (WPS), the local utility, points customers toward those same Focus on Energy programs. Funding and terms are still rolling out and change frequently, so verify current eligibility with Focus on Energy before counting on any amount.
›How much does the cold bay climate really affect my window choice?
A lot — it is the single biggest driver here. Green Bay sits in IECC Zone 6A at the head of the bay of Lake Michigan, so winters are long, wind off the water is relentless, and lake-effect snow and hard freeze-thaw cycling are the norm. That environment punishes weak glass: the fogged panes, sill ice, and interior condensation homeowners complain about are almost always a symptom of a window whose interior surface gets too cold. The fix is a low-U-factor unit — and in this climate triple-pane is genuinely worth considering rather than an indulgence — paired with a weather-tight, properly flashed install so wind-driven snow and meltwater can't work in around the frame. Solar control and impact ratings, which matter in hot or coastal markets, are not the concern here; keeping heat in is.
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
- — IECC / ENERGY STAR climate zones; NOAA Great Lakes lake-effect snow
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)