Good afternoon Everyone
I'm wondered if i can seek your advice thoughts, experience and comments. I am planning on doing a small single story rear extension on the back of my house.
Our house is a (1950’s) semi (ex local authority house). I won't be building on the dividing walls of the houses or the neighbours garden/retaining wall.
I will be building about 4m away from this retaining wall, so my new proposed foundations will not be touching this walls foundation. I have done a couple of illustrations to outline the situation.
There is quite a significant reop between me and my unattached neighbour on the right. With a minimum of 1.8m in height (This is the lowest height of the retaining wall)
The retaining wall between my neighbour and I have been there since the houses were built and is fine structurally although some facings of bricks have blown with the weather and ill repoint and repair these post the extension build and get access to the neighbours land.
Soil wise its hard clay here if that provides additional context. The drawings state my extension foundations should ne 1.5m I don’t officially know what the existing house foundation depth is, for the neighbour or I, However as mentioned I wont be surpassing the neighbours foundation depth.
The wall of the extension and the wall of the neighbour’s house is 4.1m apart. They are also as mentioned nearly 2 meters below in height. So my understanding is it is not within 3 meters and also I will not be putting foundations lower than the neighbour’s house. Therefore a PWA agreement is not required.
*Number 26, Party wall agreement required, my question is around number 28.
I believe the neighbour has been sent a legal letter from a solicitor who has seen the planning applications online and sends blanket letters requesting Party wall agreement representation via them.
I have been informed the neighbour has asked them to assess the status of the retaining wall an how sound it is.
My questions are as follows
· As far as I understand if this assessment is done and there is a cost to it (the neighbours assessment) I would not be liable as I’m not I the party wall requirement? Is that correct?
· I have spoken to my Architect who is also a structural engineer and surveyor, and he has said there is no concern. Do I also need to run this via building control?
· I presume if the PVA is not required that I don’t need to serve any form of notice and can look to begin the works and just start?
· My question is around a Party wall agreement, based on the information above and the diagram below is a party wall agreement required?
I just want to double check and someone else may have similar experience to me. Thanks in advance for your comments