Digging basement - distance from neighbours outbuildings

[Guy Bristol]

Hi everyone. I'm in the early stages of planning for an improvement I want to make in the garden. I have an existing garage I wish to knock down, building a small basement before putting a new structure on top. If I plan to dig down 3.5M how far away do I need to be from the neighbours outbuilding? It's a brick structure they use as storage. Am I right in thinking it's 1M + distance down? Is this the case for outbuildings? The basement itself is well away from any lived in property structures.

Edited January 29, 2021 by Guy Bristol

[Temp]

Read the Guide to the Party Wall Act. This makes things more difficult if you want to dig...

 

a) Within 3m and deeper than their foundations.

Or

b) Within 3-6m and below a line extending down 45 degrees from the bottom of their foundations.

 

So let's say their foundations are 1m deep and you want to go down 3.5m. You would need to be 3.5 - 1m = 2.5m away. This is less than 3m so you either need to move it to be 3m away or comply with the Party Wall act.