Cost to Install a Glass Door Insert. How much is a glass door insert? The contractor cost to install a glass door insert is $500 vs. doing it yourself for $350 and saving 30 percent.Click to see full answer. Considering this, how much does a glass door cost?Prices start at about $300-$800 for a basic 5′-6′ wide sliding glass door, or $700-$1,100 or more for a standard 8′ wide door, typically with an aluminum or vinyl frame and options like a screen door or built-in blinds (between the panes of glass).Furthermore, what is the average price for exterior door installation? A standard interior door costs about $75 to $125. An exterior doors cost an average of $500 to $2,000 with some installations exceeding $10,000. In respect to this, how much does it cost to replace front door glass? Replacing double pane window glass falls on the higher range with an average cost between $350 and $400, while the price to install new glass in a front door can fall anywhere between $100 and $500. Prices will range depending on your window style, the type of glass and labor costs.How do you install a glass door insert? How to install glass insert into door First step is using the frame of the glass insert to draw your cut line on the door. Next, drill holes in the corners. Using a good jigsaw with a blade long enough to go through a 1 3/4″ door, cut along the pencil out line of your frame. Insert one side of the frame. Paint, stain, seal your door.