Local research · updated July 2026
Double-hung windows in Janesville, Wisconsin
Two vertically sliding sashes; both the top and bottom sash open. For Janesville's older housing stock (63.2% of homes predate 1980), double-hung window replacement is a common project — and in the ENERGY STAR Northern zone, the number that matters most is a low U-factor (≤ 0.22) to keep heat in.
Short answer
Double-hung windows in Janesville typically cost $655–$2,985 installed per opening. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand.
NREL REMDB + BLS PPI, localized to Janesville (BEA Regional Price Parity, 2024). How we estimate →
$655–$2,985
installed range per opening for Double-hung window, from a mid-grade insert up to a premium or full-frame job
Source: NREL REMDB + BLS PPI, localized to Janesville
63.2%
of Janesville homes were built before 1980
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
Is a Double-hung window right for a Janesville home?
Both sashes slide vertically and typically tilt inward for cleaning.
Where it fits:
- Traditional and historic home styles
- Rooms facing walkways, porches, or patios (no outward projection)
- Easy cleaning from inside on upper floors
What to weigh:
- More potential air-leakage paths than hinged styles at equal quality
- Half the opening ventilates at any one time
Double-hung windows and Janesville's climate
Janesville sits in the ENERGY STAR Northern zone (IECC zone 5A (cold, moist), Rock County), where the priority is a low U-factor (≤ 0.22) to keep heat in.
Double-hung sashes seal against weatherstripping as they slide, so they have more potential air-leakage paths than hinged styles. In the Northern zone, prioritize a well-built unit and a low U-factor (≤ 0.22) to offset that.
New to these numbers? See our plain-English guide to U-factor and SHGC and the full double-hung guide.
What Double-hung windows cost in Janesville
Double-hung window replacement in Janesville runs $655–$2,985 installed. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand. Southern Wisconsin pricing sits between Rockford IL and Madison rates. Old openings erase cheap-window promises. Federal 25C is gone; Focus on Energy is a realistic path.
That's the national range shifted to Janesville's cost level using the BEA Regional Price Parity for Janesville-Beloit, WI (93.7, U.S. = 100; 2024). How we estimate local costs →
For a breakdown by frame material and install type, see our full cost guide.
Installers serving Janesville
A sample of companies with locations in the Janesville market. See the full Janesville directory for all listings, our map, and featured-partner disclosures.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Madison, WI | Get a quote → |
| 1Champion Replacement Windows of MadisonChampion | Madison, WI | Get matched → |
| 2Feldco Windows, Siding, Doors & Roofing of RockfordFeldco | Rockford, IL | Get matched → |
| 3Mad City RemodelingMad City Windows | Madison, WI | Get matched → |
| 4Mad City Windows & Baths of MadisonMad City Windows | Madison, WI | Get matched → |
Renewal by Andersen of Janesville
4.8 · 200,000+ reviewsShowrooms in Madison & Janesville · serving the Janesville 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 Janesville homeowners directly.
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. See our Janesville guide for the full program list.
Double-hung windows in Janesville: FAQ
›What efficiency numbers should a Double-hung window in Janesville meet?
Janesville sits in the ENERGY STAR Northern zone (IECC 5A (cold, moist)). Qualifying units need a U-factor of 0.22 or lower with an SHGC of at least 0.17. Double-hung sashes seal against weatherstripping as they slide, so they have more potential air-leakage paths than hinged styles. In the Northern zone, prioritize a well-built unit and a low U-factor (≤ 0.22) to offset that.
›How much does Double-hung window replacement cost in Janesville?
A useful planning range for Double-hung window replacement in Janesville is $655–$2,985 installed. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand. Southern Wisconsin pricing sits between Rockford IL and Madison rates. Old openings erase cheap-window promises. Federal 25C is gone; Focus on Energy is a realistic path.
›Do I need a permit to replace Double-hung windows in Janesville?
Replacement generally requires a permit, and new units must meet the current energy code. See our Janesville guide for local permitting and rebate details, and always confirm your installer pulls the permit.
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
- — NREL residential window cost analysis (planning ranges)