Permitted development guidance: flowcharts

On this page you can find flowcharts for the following common projects:

• single storey ground floor extension – class 1A

• ground floor extension of more than one storey – class 1B

• construction or alteration of a porch – class 1C

• alteration to a roof – class 1D

• access ramp – class 2A

• changes to the appearance of your house which are not an extension – class 2B

• outbuildings: sheds, sun houses, greenhouses and garages – class 3A

• other building work – class 3B

• hard surface: paving, patios and driveways – class 3C

• decking and raised platforms – class 3D

• flats – class 4A