Need some advice
I have an outbuilding in my garden
My neighbor has the same mirror building on their side
The outbuilding has one roof over mine and my neighbours
My outbuilding has 2 smal rooms (one is an old toilet and the other storage)
I plan to knock the wall down in-between creating a bigger space for a utility
My question is if I break down the wall in-between my 2 buildings, would I need steel supports or anything
Roof is concrete
Walla are single brick walls
The building would measure around 1.5m x 1.5m
I have attached pictures