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.
Planning portal roof volume calculator.
Lean to single pitch roof.
Results are shown in the total volume field.
Please select the appropriate volume calculator below.
These calculators are based on standard building shapes.
They should be used with care if the building you are measuring involves a combination of these forms or differs in a significant way from those in the calculator.
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.
Any alteration to project no more than 150 millimetres from the existing roof plane.
Results are shown in the total volume field.
Results are shown in the total volume field.
Dormer window flat 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.
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 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.