Window Replacement Cost in Montana

Estimated $4,989 – $7,484

Itemized cost breakdown
Item	Estimate
Old window removal	$643
Window unit	$3,200
Installation labor	$1,638
Trim, flashing & finish	$562
Disposal	$193
Subtotal	$6,236

What affects window replacement cost in Montana

Window Replacement costs in Montana differ from the national baseline mainly because of local labor rates. Carpentry labor in Montana runs about 9% below the national average carpenter wage (BLS), holding installation cost down. Montana's steep mountain valley microclimates swing from extreme cold to high UV in summer; triple-pane, low-E, gas-filled units (ENERGY STAR Northern zone) hold up better than single-pane stock across this wide temperature range. Most Montana jurisdictions require a permit for window replacement (egress sizing, and in wind zones impact-rated glazing); typical residential fees run $100–$350, usually with a final inspection. Montana levies no sales tax, so replacement windows are not taxed at the point of sale.