The External Door Estimating Calculator estimates the materials, labour and plant required to fit a front or rear external door in a new wall.

This estimating calculator is linked to the Specification. Items relating to the structural opening and finishes are taken from the Specification.

The information taken from the Specification, along with the options you select from the door specifier and the dimensions you enter, will be used to calculate the following items:

  • Doors
  • Lintels
  • Frame fixings
  • Cavity closer
  • Threshold board
  • DPCs
  • Door hinges and furniture
  • Plastering
  • Decoration
  • Labour associated with the above


  • To fit an external door into an existing wall, use the External Door to Existing Wall Estimating Calculator. This will estimate the cost of forming the opening.