Local research · updated July 2026
Replacement Windows in Billings, Montana
Billings is Montana's largest city and its commercial engine — an energy, medical, and agricultural hub set on the Yellowstone River in the shadow of the Rimrocks — and it anchors Renewal by Andersen's whole "Montana" territory, so it is where the state's replacement-window market really gets defined. The housing question here is squarely about age and cold: about 51.2% of homes predate 1980 and the median build year is 1979, which means more than half the market is running on original single-pane or first-generation double-pane units now decades past their prime. Billings sits in IECC climate zone 6B — a cold, dry high-plains climate where heating dominates the bill and a low U-factor is the number that matters — and it sits squarely in one of Montana's most active hail corridors, so storm-driven glass damage is a recurring second reason people replace. The right spec here is a tight, low-U unit built for the ENERGY STAR Northern zone, not a warm-climate glass package carried over from a national brochure.
Short answer
In Billings, a standard replacement window (double-hung, casement or slider) typically costs $525–$2,980 installed. Bay and bow windows run $2,620–$8,375+, and a sliding patio door $1,570–$5,230. 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 Billings with the BEA Regional Price Parity for Billings, MT (2024). How we estimate →
51.2%
of Billings 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
1979
median year built across Billings's 53,537 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 Billings
Compare companies serving Billings. 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 | Billings, MT | Get a quote → |
| 1Pella Windows and Doors Showroom of Billings, MTPella | Billings, MT | Get matched → |
Renewal by Andersen of Montana
4.8 · 200,000+ reviewsBillings, MT showroom · serving the Billings 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 Billings homeowners directly.
What drives window decisions in Billings
- Aging housing stock: roughly 51.2% of metro homes predate 1980 and the median build year is 1979, so a majority of houses still carry original or early-generation windows well past their service life, with failed seals, drafts, and hard-to-operate sashes common across the older Heights and South Side neighborhoods.
- IECC climate zone 6B (cold, dry): long, cold high-plains winters reward a low U-factor and tight air sealing above all else, while the dry continental air makes wintertime drafts and condensation on tired older sashes a frequent complaint. Montana enforces a 2021-IECC-based statewide energy code with zone-6 amendments, so there is a real low-U performance bar behind new work here.
- Hail corridor: Billings sits in one of Montana's busiest severe-weather tracks, where storms building over Wyoming push northeast across the plains and regularly drop damaging hail. Wind-driven hail that cracks glass or blows out insulated-glass seals drives a meaningful share of replacements, often through an insurance claim, and makes impact-rated or laminated glass worth asking about on exposed elevations.
- Regional hub geography: as an energy, medical, and agricultural center on the Yellowstone River and the seat of Yellowstone County, Billings mixes older in-town housing with newer subdivision growth, so opening sizes, trim details, and installation methods vary widely from one house to the next — an on-site measure matters more than a headline per-window price.
Replacement windows & doors by type in Billings
Local cost ranges and Northern-zone efficiency guidance for each window and door style, specific to Billings homes:
Ranges localized to Billings's cost level: national planning ranges shifted by the BEA Regional Price Parity for Billings, MT (93.5, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Billings's climate
Billings sits in the ENERGY STAR Northern zone (IECC zone 6B (cold, dry), Yellowstone 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
Window pricing in Billings follows the same drivers as anywhere: the number of openings, the frame material, the glass package, and whether the crew is doing a simple pocket insert or a full-frame tear-out. Because a majority of homes here predate 1980, non-standard openings, plaster returns, and hidden rot are common and can move the number once work starts, so an on-site inspection matters more than a national per-window figure. The cold-climate performance bar adds its own cost pressure — hitting the ENERGY STAR Northern U-factor target through zone-6B winters pushes many honest bids toward high-end double-pane or triple-pane glass, which sits above the basic double-pane national averages often reflect. Hail-damage jobs can be partly offset by an insurance claim rather than paid fully out of pocket, which changes the math on exposed elevations. With essentially no state or utility window rebate to lean on, the smart move is to get itemized written quotes from multiple local installers and compare the exact same glass spec, pane count, and installation method line for line.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in Montana
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.
Montana's IRA Home Energy Rebates are administered by the Department of Environmental Quality (DEQ) Energy Bureau; DEQ submitted its implementation application in late 2024 and received a conditional award, but the programs remained in a pended, pre-launch status with no rebates available as of mid-2026. Under the whole-home HOMES pathway, replacement windows could count toward modeled energy savings rather than earning a standalone rebate. Confirm current status with Montana DEQ before promising rebates.
- NorthWestern Energy E+ (MT). NorthWestern Energy serves roughly 90% of Montana and its Efficiency Plus (E+) program offers residential rebates for measures such as insulation, HVAC and water heating; a dedicated replacement-window rebate is not a standard E+ offering, so confirm current measures directly. (NorthWestern Energy (northwesternenergy.com))
- Montana-Dakota Utilities (MDU) Residential Rebates. In its Montana service area MDU rebates high-efficiency furnaces, thermostats and LED lighting for existing homes; windows are not among the rebated measures. (Montana-Dakota Utilities (montana-dakota.com))
Montana enforces a statewide residential energy code based on the 2021 IECC with state amendments (adopted in 2022), which sets prescriptive window U-factor limits for its cold, dry IECC zone 6B climate. Permitting and enforcement run through certified local jurisdictions, so check local requirements for replacement-window U-factors.
Replacement windows in nearby metros
Not in Billings proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Billings window replacement FAQ
›Do I need a permit to replace windows in Billings?
It depends on scope. The City of Billings Building Division administers permitting, plan review, and inspections inside the city, and a straight like-for-like replacement in the existing opening — same size, no structural change — generally does not require a building permit. You do need a permit any time you enlarge, reduce, or relocate an opening, alter a structural header, or affect egress, and basement bedroom windows must meet emergency-egress sizing. Montana enforces a 2021-IECC-based statewide energy code (adopted June 2022, with climate-zone-6 amendments) that the city inspects against, so new work has a real low-U performance floor behind it. Because thresholds change, confirm your specific project with the Billings Building Division (permits@billingsmt.gov, 406-657-8270) before you sign, and if your home is outside city limits check with Yellowstone County. Have your contractor pull any required permit in their name.
›What efficiency numbers should replacement windows hit in Billings?
Billings is in the ENERGY STAR Northern climate zone (IECC zone 6B — cold and dry), where the current criteria call for a U-factor of 0.22 or lower and a solar heat gain coefficient (SHGC) of 0.17 or higher. That SHGC is a floor, not a ceiling — unlike Sun Belt metros, a cold-climate home benefits from letting winter sun in, so you are not chasing the lowest solar-gain number. Focus on the U-factor on the NFRC label: in this heating-dominated climate it is the number that matters most, and hitting 0.22 comfortably is a big reason triple-pane shows up so often on Billings quotes. In this deep cold, also ask about a warm-edge spacer to control condensation during hard cold snaps, and insist on seeing the NFRC label for the exact unit being quoted rather than a brand's best-case brochure figure.
›Are there any window rebates in Billings right now?
Realistically, no — and it is worth being clear-eyed about it. The federal 25C Energy Efficient Home Improvement Credit, which covered qualifying windows, expired December 31, 2025, so it is not available for 2026 installs. Montana's IRA-funded Home Energy Rebates (HOMES and HEAR), administered by the state Department of Environmental Quality (DEQ), had not launched as of mid-2026, so there is no live state window rebate to count on. NorthWestern Energy, which serves roughly 90% of Montana including Billings, runs its Efficiency Plus (E+) program — but the residential rebates there center on insulation, heat pumps, water heaters, and other HVAC and equipment measures, not a standard window rebate. So plan on paying for the window itself out of pocket as a case-by-case installer quote, and verify any current offer directly before you budget around it.
›How much do hail and cold really drive window replacement here?
A lot — they are the two defining local pressures. Billings sits in one of Montana's most active hail corridors, and wind-driven hail routinely cracks glass and blows out insulated-glass seals; the costly June 2010 hailstorm is the benchmark event, and repeated hail seasons have made storm damage a leading reason windows get replaced, often through an insurance claim. Photograph any damage before a unit is removed, file promptly, and ask installers about impact-rated or laminated glass on exposed elevations. The other pressure is the climate itself: long zone-6B winters, blizzards, and deep cold punish worn weatherstripping and failed seals, and reward a tight, low U-factor install more than almost anywhere. Both point to the same spec — a well-sealed, low-U window built for the ENERGY STAR Northern zone, with tougher glass where storms hit hardest.
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
- — National Weather Service Billings (weather.gov/byz); Montana Commissioner of Securities and Insurance (csimt.gov); June 2010 Billings hailstorm claims record
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)