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Window Replacement Cost in Montana (2026)

Window replacements in Montana typically run $5,400–$13,800 for a 10-window 1,500 sq ft single-story full-house window replacement, with vinyl-frame double-hung the dominant residential choice and ENERGY STAR Northern climate-zone glazing requirements (U-factor ≤ 0.27, no SHGC limit). Montana's combination of 48-inch frost depth across northern Montana, F3 freeze-thaw cycling, -40°F winter low temperatures driving Montana state energy code U-0.27 maximum-U-factor mandate, and high-altitude UV exposure across the Continental Divide driving Sun-Belt-rated UV-stabilized vinyl frames on every south-and-west-facing residential install drives extreme cold-climate-and-high-altitude-driven glazing selection.

State Montana
Cities Covered 4
Typical 10-window 1,500 sq ft single-story full-house window replacement $5,400 – $13,800
BLS carpenter wage $21.84/hr

Montana climate, wind & energy-code drivers

  • ENERGY STAR climate zone: Northern — coldest climates, U-factor priority (U ≤ 0.27 in coldest tier)
  • IECC climate zone: 6B-7
  • Maximum U-factor: 0.27 (IECC 2021 + state amendments)
  • Maximum SHGC: No limit (cold climate)
  • ASCE 7-22 design wind speed: 105 mph (Risk Category II)
  • Hurricane impact-rated requirement: No statewide impact-rated requirement
  • Dominant residential frame material: Vinyl frame — dominant in most climates, lowest cost-per-window
  • Historic-preservation overlay prevalence: Low — limited historic-preservation review outside specific neighborhoods
  • EPA RRP lead-safe trigger (pre-1978 housing share): Moderate — 20-40% pre-1978 housing share, EPA RRP required on selected replacements

Montana licensing, lead-safe & permits

  • License status: Statewide registration required (no exam)
  • License board: Montana Department of Labor & Industry — Independent Contractor Registration (official site)
  • Permit: city or county building permit required for window opening modification; Montana Independent Contractor Registration required; replacement-only same-size installs typically permit-exempt; Montana state energy code amendments mandate U-0.27 maximum window U-factor

How window replacement costs vary in Montana

State-specific code or insurance rule: Montana has no statewide residential builder license — Montana Department of Labor & Industry operates an Independent Contractor Registration system without examination, bond, or board oversight, leaving Bozeman, Billings, Missoula, Great Falls, and Helena homeowners to rely on municipal license history rather than a state credential check, plus Montana state energy code amendments separately mandate U-0.27 maximum window U-factor on every Montana residential installation as one of the lowest mandatory U-factor mandates in the lower 48 to address -40°F winter low temperatures across the Continental Divide and Eastern Plains.

Cities in Montana

Compare window replacement pricing for 4 cities across Montana.

Billings, MT

Compare local window replacement pricing in Billings.

Bozeman, MT

Compare local window replacement pricing in Bozeman.

Great Falls, MT

Compare local window replacement pricing in Great Falls.

Missoula, MT

Compare local window replacement pricing in Missoula.

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Pricing ranges reflect Montana market labor (BLS OEWS carpenter (window installers) mean $21.84/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.