Exterior vs. Interior
Installing interior storm windows costs around $24 per square foot, or $250 to $400 per panel. This is up to $38 per square foot less than exterior impact-resistant windows.
Interior storm windows include a single pane, while exterior windows include two or three tracks. A two-track window allows you to slide the installed pane up or down on only the inner track. A triple-track system provides separate tracks for the screen and both windowpanes. This allows you to move the panes for cross-ventilation.
The indoor storm panels attach to the inner frame of your windows and leave the exterior panes in place. Their design protects the interior of your home but leaves the existing windows at risk of storm damage. This style is best if you want to keep the current look of your home or have to follow the rules for historic builds.
Add-Ons
Additional features are available to make storm windows more durable, insulated, or ventilated.
Stabilizer bar: These bars cost $20–$40 apiece and boost the structural integrity of the storm windows, making them more durable.
Triple-track windows: These windows hold each sash in a separate track and add $30–$50 to the cost of each storm window.
Double-pane windows: Double-pane windows have two separate glass panes, and the added material cost adds about $50–$100 per window.
Adjustable ventilation stops: A set of adjustable ventilation stops that sit within the inside track of the windows is $10–$50.
Shutters: For added protection, storm shutters cost an additional $2,000–$6,000 to install. These may also be used instead of hurricane windows, depending on your needs.
Cost to Install Impact Windows
Installation costs can vary depending on whether you are installing windows into existing walls, replacing old windows with impact-resistant options, or even depending on the number of windows you need.
Number of Windows
Each window costs around $100 to $2,100, so the more windows a house has, the higher the cost will be.
Size and Shape
The larger the window or more complex the shape, the more expensive the total will be. Custom window shapes or sizes can increase the cost by up to three times.
Create New Opening
Creating a new opening to install a window costs $1,000 to $5,000 per window. The cost may be high because in addition to creating an opening in an existing wall, you may need to hire plumbers and electricians to reroute pipes and wires. The cost also includes framing, installing drywall, and repairing siding.
Replacing Windows
To swap standard windows for hurricane-resistant windows, expect to spend about an additional $50 per window to take out the old windows. Replacing existing storm windows costs $6,510 on average. Expect a higher price if changing the window sizes or locations.
LaborÂ
Labor costs add $80 to $400 per window. Professional window installers may also charge an hourly rate of $30 to $65 per hour. Each window will take about two hours to install.
Permits
Building permits vary by location, but you can expect to spend $50 to $200 for permit costs to install new storm windows or replace existing windows.