Following on from the rules of permitted development and the limitations of how far you can extend there is also an option whereby you can potentially double your allowance of how far out you can project at the rear, this falls under a larger householder application or prior notification application.
This means that for a semi-detached property you can extend at the rear without the need for planning permission from 3m to 6m and for a detached property 4m to 8m. This is a 42-day application process and requires your neighbour to be happy with your plans otherwise any valid complaints within the 42-day period will jeopardise your plans.
All other rules of permitted development will still apply.
We offer a free initial consultation and provide a fixed quote depending on your needs. Once you are happy with the quote and have accepted our terms then from there the next steps would usually be as follows.