To want to get in there first?

[namech]

Hi all to cut a long story short, we don't own all our back garden but the company that owns part of the garden wants it back to sell for development. Now a planning company has drawn up plans for a pair of houses that is going to more or less touch our (what will be) boundary fence in the back garden. The side wall of the proposed house will face the back of our house and he says will be a permissible 19m from our back door. We want to have a single storey extension built in a couple of years time when our money situation is a bit better. I think that if we put plans in after these houses are built our planning permission will be turned down so AIBU to put planning permission in before they do?
If so does anyone know how I can go about this quickly please?

Depending on where you are wouldn’t it be covered under permissible planning so if you put it in now it would become non applicable anyway.

Unless you have had your permitted development rights removed or are in an area where permitted development rights are reduced (or have previously extended, you are unlikely to need planning permission for a single storey rear extension.

What you should do is call the planning department or look at their website to establish is 19m rear to side is an acceptable distance (probably is to be honest).

If you wish to object to their application then be very clear why you are and ensure they are planning grounds.