Gap between my wall and neighbour’s extension

[Smelly Duvet]

Hi,

 

We are moving into a semi-detached house next to a neighbour who had their one storey side extension plan approved. The final plan is to keep a gap away from our wall instead of sharing a party wall (ours was an extension built by previous owner right up to the boundary).

 

Although we do prefer not sharing a wall, the approved floor plan does not specify the width of the gap. Can we assume it to be 50mm as required by law? If so we are a bit concern about dampness and debris falling into it as it is not possible to be cleaned (and it’s on their side).

 

Will we be better off to let them share our wall? With only 50mm left between us, will the visual “terracing effect” plus all the cons mentioned above lead to devaluation of our house?

 

Appreciate if anyone can share your experience. Thank you!

 

 

Edited February 14 by Smelly Duvet

[Temp]

Will it be a flat roof and which way will it slope? 

 

Normally any overhang and or gutter will determine the gap as much as anything.

 

I don't think 50mm will be enough for them to properly fix/finish the edge of roofing felt. I would ask about this detail and future maintenance.

Edited February 14 by Temp

[joe90]

As @Temp says, go and ask what they propose.

[Mike]

On 14/02/2024 at 15:03, Smelly Duvet said:

Will we be better off to let them share our wall? With only 50mm left between us, will the visual “terracing effect” plus all the cons mentioned above lead to devaluation of our house?

Personally I'd certainly request that they share the wall, ideally adding an additional leaf for maximum sound insulation. Any gap between that you can't at least walk through will be a pain for maintenance and may put off prospective purchasers of both your house and theirs.

 

Edited February 16 by Mike