To sell a house with "posible subsidence"

mellizo

My grandmother (82) wants to sell her property, a terraced house divided into two apartments. The property is in the NW6 area.
Several estate agencies came over to evaluate and told us that the “asking price” could be around 1.450 k.
After the evaluation, we ran a Building Survey, as we know the house is in bad shape, and found out that there is “possible subsidence”, “wet rafters”, and “raising damp” , among many other small things.
There is no question that these problems will take a toll in the sale price, but how much do you think?
We might make an effort to solve those problems in the hope that the house could fetch a much better price in the market. Is it feasible?

kinger101

I think getting the survey done was a big mistake. Now you may have to declare it on the TA6 form. What was the exact wording? Any "longstanding" or "historic" in there? If not, it might need a structural engineer to determine whether there is any ongoing movement.....might be better to leave that to a buyer though.

mellizo

"it is unclear whether this movement is historical and has ceased or whether it is current and on-going", says.
"Arrange for a registered structural engineer to inspect the cracks", adds up.
"It is possible that the presence of the large tree on the pavement could also be influencing the building", declares.
Everything is very ambigous, but it seems obvious that a new and specific survey it is needed.

The plan is to leave it to the buyer, but we want to know how much this ambiguity might cost.

The family is pretty sure that this is an historic movement that only affects an addition made some 20 or so years ago.