Planning Portal Roof Volume Calculator

Dormer window flat roof.

Planning portal roof volume calculator.

Results are shown in the total volume field. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Volume calculator pitched roof one end hip planning portal volume calculator pitched roof one end hip enter the measurements in the fields below and then click the calculate button. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.

Please select the appropriate volume calculator below. Results are shown in the total volume field. Any alteration to project no more than 150 millimetres from the existing roof plane. If in doubt seek advice from a qualified person or your local planning authority.

Lean to single pitch roof. Volume calculator dormer window with flat roof planning portal volume calculator dormer window with flat roof enter the measurements in the fields below and then click the calculate button. Results are shown in the total volume field. Volume calculator lean to single pitch roof planning portal volume calculator lean to single pitch roof enter the measurements in the fields below and then click the calculate button.

You do not normally need to apply for planning permission to re roof your house or to insert roof lights or skylights as the permitted development rules allow for roof alterations subject to the following limits and conditions.