Retaining wall for patio on sloped garden

[danped]

Hi,

I have a back garden which slopes away from the house, at most it is about 1.5m drop for every 6m away from the house. We have an existing patio which is a narrow (2.6m x 7m) platform. I'd like to make a larger patio are and have been thinking about getting a retaining wall built and then doing the backfill and patio work myself.

I want be sure the new wall doesn't have any adverse impact on the existing building. I suppose if I was doing this on flat land I wouldn't have given it a second thought, but as it isn't , I have. My question is there any rules of thumb I can follow to determine if I need some more professional opinion on whether the plans are feasible or if they need a professional opinion? I have put some pictures below to help explain.

 

[Tigercubrider]

Don't you need planning for a raising of ground level?

 

[danped]

Perhaps, what are the rules?

 

[Tigercubrider]

300 mm from original ground level

The main thing is to stop you building a massive deck that overlooks the neighbours so get them to support?

 

[danped]

Ah ok, I guess one side would be more than that, the other side would be close. However The neighbours are not very close so I don't think that would be an issue I will get appropriate permission in advance. Now, back to my original question, in terms of digging foundations is there anything to worry about at that distance from the house?

 

[rssteve]

How high will the retaining wall be?

 

[^woody^]

Don't you need planning for a raising of ground level?

No

 

[^woody^]

I want be sure the new wall doesn't have any adverse impact on the existing building

It will have no impact at all

 

[danped]

How high will the retaining wall be?

About 90cm.

 

[Nakajo]

Yep, that's the weird thing about gravity