Cost of Exterior Door Installation in Montana$412.30 per door (includes mid-grade steel entry door) (Range: $349.83 - $474.76) Free Estimates from Local ProsCost of Interior Door Installation in Montana$189.41 per door (replace a mid-grade door, no framing required) (Range: $159.92 - $218.89) Free Estimates from Local ProsCost of Sliding Door Installation in Montana$766.62 fixed fee to replace exterior sliding glass door (Range: $707.65 - $825.59) Free Estimates from Local ProsCost of Garage Door Installation in Montana$792.11 metal garage door (single 8' x 7') with opener (Range: $709.65 - $874.56) Free Estimates from Local ProsCost of Garage Door Repair in Montana$220.39 fixed fee for spring replacement (including materials) (Range: $208.90 - $231.88) Free Estimates from Local Pros |