Permitted development guidance: flowcharts

Flowcharts providing guidance on whether common projects are permitted developments.

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

  • other building work – class 3B

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

  • decking and raised platforms – class 3D

  • flats – class 4A

Single storey ground floor extension - Class 1A.pdf
Construction or alteration of a porch - Class 1C.pdf
Alteration to a roof - Class 1D.pdf
Access ramp - Class 2A.pdf
Other building work - Class 3B.pdf
Hard surface - paving, patios and driveways - Class 3C.pdf
Decking and raised platforms - Class 3D.pdf
Flats - Class 4A.pdf



Telephone: 0131 244 7528

Area 2-H (South)
Planning and Architecture Division
The Scottish Government
Victoria Quay

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