Single story rear extension

[Harry]

We are hoping to build a rear extension to our semi detached property. I know the new rules are 6meters, i was thinking what if i go longer and not the full width of the house. For example if i were to go 6.5 meters back and take a bit off the width to keep within the square footage? 

 

Please help!

[PeterW]

Unfortunately that isn’t how the rules work, so you’re limited unless you get planning permission. 

[Temp]

There are a bunch of rules limiting what you can do without needing planning permission. Best work through each one on this page to be sure it doesn't cause a problem..

https://www.planningportal.co.uk/info/200130/common_projects/17/extensions