Bilco Classic Series Powder Coated Door Extensions

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The Bilco Powder Coated Basement Door Extensions can be used to increase the door lenght for Size C Bilco Powder Coated Basement Doors only. They cannot be used for Size B or any other type of Bilco Basement Doors. The steel painted cellar door extensions give great flexibility for the length of the basement door. Bilco's Powder Coated Basement Door Extensions are only available in 6", 12", 18", 24", and 30" extensions and powder coated colors of white, light gray, sandstone, and brick.


  • Consists of the left side panel, right side panel, and cover panel
  • Necessary hardware included
  • Satisfies the IRC 2012 building code requirements for emergency egress
  • Increases the door unit length to fit longer areaways
  • Offers a superior finish to conventional paint
  • Durable, attractive, and extremely scratch-resistant finish
  • Process is environmentally friendly and virtually pollution-free
  • 1 Year Warranty on Finish
  • Made in the USA


  • 6" Extension Weight: 27 lbs.
  • 12" Extension Weight: 44 lbs.
  • 18" Extension Weight: 60 lbs.
  • 24" Extension Weight: 72 lbs.
  • 30" Extension Weight: 91 lbs.