Local research · updated July 2026
Casement windows in Duluth, Minnesota
Side-hinged sash that cranks outward like a door. For Duluth's older housing stock (78.3% of homes predate 1980), casement 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
Casement windows in Duluth typically cost $495–$2,260 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 Duluth (BEA Regional Price Parity, 2024). How we estimate →
$495–$2,260
installed range per opening for Casement window, from a mid-grade insert up to a premium or full-frame job
Source: NREL REMDB + BLS PPI, localized to Duluth
78.3%
of Duluth 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 Casement window right for a Duluth home?
Crank handle swings the full sash outward; locks compress the seal.
Where it fits:
- Maximum ventilation — the whole opening opens
- Tightest air seal of the common operable styles (compression seal)
- Hard-to-reach placements like over kitchen sinks
What to weigh:
- Projects outward — check clearance to walkways and screens
- Hardware is the wear item; crank quality matters
- Width limits — very wide openings need mulled units
Casement windows and Duluth's climate
Duluth sits in the ENERGY STAR Northern zone (IECC zone 7A (very cold), St. Louis County), where the priority is a low U-factor (≤ 0.22) to keep heat in.
A casement closes against a compression seal — the tightest of any operable window. In the Northern zone's cold winters, where air leakage drives heating loss, that seal is a real advantage.
New to these numbers? See our plain-English guide to U-factor and SHGC and the full casement guide.
What Casement windows cost in Duluth
Casement window replacement in Duluth runs $495–$2,260 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. Duluth quotes are shaped more by glass and prep than by labor rates. The dominant driver is the product itself: because the Minnesota energy code and the zone 7A climate push toward very low U-factor units, many honest local bids assume triple-pane, which sits above the basic double-pane national averages often reflect. The second driver is the age of the stock — homes from around the 1951 median frequently have out-of-square openings, old weight-and-pulley frames, or rot and lead paint that turn a simple insert into a full-frame replacement with remediation. The offset is real: heating-season savings in this climate are among the largest in the country, Minnesota runs live IRA Home Energy Rebate programs, and the City of Duluth Energy Loan (administered with ComfortSystems) can finance envelope work at a fixed rate. Before comparing numbers, confirm pane count, the NFRC U-factor, and whether each bid is an insert or full-frame install.
That's the national range shifted to Duluth's cost level using the BEA Regional Price Parity for Duluth, MN-WI (88.8, 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 Duluth
A sample of companies with locations in the Duluth market. See the full Duluth directory for all listings, our map, and featured-partner disclosures.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Superior, WI | Get a quote → |
| 1Mad City Windows & Baths of DuluthMad City Windows | Duluth, MN | Get matched → |
| 2Window World Twin Ports RegionWindow World | Duluth, MN | Get matched → |
Renewal by Andersen
4.8 · 200,000+ reviewsSuperior, WI showroom · serving the Duluth 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 Duluth homeowners directly.
Rebates & incentives in Minnesota
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.
Minnesota's IRA Home Energy Rebates (Save Energy Minnesota, administered by the Department of Commerce) were still awaiting federal DOE approval and not yet open to homeowners as of mid-2026. In the meantime, the live path is the utility Conservation Improvement Program (CIP): whole-home efficiency retrofits can include windows within a modeled-savings project. Confirm current status with Minnesota Commerce before counting on rebate dollars. See our Duluth guide for the full program list.
Casement windows in Duluth: FAQ
›What efficiency numbers should a Casement window in Duluth meet?
Duluth sits in the ENERGY STAR Northern zone (IECC 7A (very cold)). Qualifying units need a U-factor of 0.22 or lower with an SHGC of at least 0.17. A casement closes against a compression seal — the tightest of any operable window. In the Northern zone's cold winters, where air leakage drives heating loss, that seal is a real advantage.
›How much does Casement window replacement cost in Duluth?
A useful planning range for Casement window replacement in Duluth is $495–$2,260 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. Duluth quotes are shaped more by glass and prep than by labor rates. The dominant driver is the product itself: because the Minnesota energy code and the zone 7A climate push toward very low U-factor units, many honest local bids assume triple-pane, which sits above the basic double-pane national averages often reflect. The second driver is the age of the stock — homes from around the 1951 median frequently have out-of-square openings, old weight-and-pulley frames, or rot and lead paint that turn a simple insert into a full-frame replacement with remediation. The offset is real: heating-season savings in this climate are among the largest in the country, Minnesota runs live IRA Home Energy Rebate programs, and the City of Duluth Energy Loan (administered with ComfortSystems) can finance envelope work at a fixed rate. Before comparing numbers, confirm pane count, the NFRC U-factor, and whether each bid is an insert or full-frame install.
›Do I need a permit to replace Casement windows in Duluth?
Replacement generally requires a permit, and new units must meet the current energy code. See our Duluth 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)