Function

• Basement windows provide a source of ventilation, light and a potential escape route in emergency situations. Upgrading a basement by installing a window brings the space up to fire code for a bedroom.
  
  

Types

• Basement window options range from small pop-out kits to full sliding window and standing stairwell exits. Prices start at near $200 and go as high as $2,000 for deluxe systems. Choices are available to for a range of strengths and sizes to accommodate a larger basement or underground living area.
  
  

Materials

• Window materials for basement windows are specialized to withstand the environmental elements of being so low to the ground and under the weight of the house's frame. A variety of options are available to match the look of the vinyl or wood pane windows of the rest of the house.
  
  

Installation

• Installing a basement window yourself or with a friend will cost about $500 and take between two and three days. Contracting a professional to do the job will cost about $2,000 to $3,000 depending on the difficulty of the excavation process.
  
  

Maintenance

• Maintenance costs are low on a basement window and most come with a lifetime guarantee. The window should be cleaned monthly and tested at every cleaning to ensure that it is functioning as a viable exit.