Thanks for all the replies. The plot is in NI so not sure what and if CIL applies.
The seller has put the footings in to keep the planning in date.
Although I haven’t seen the full design drawings and calculations I am assuming that they will be to minimum standards.
I would in all likelihood want to change a couple of things with the house so am prepared to have to redo the footings, particularly in regards to the sunroom as the current layout the sunroom to me is too small.
I would like the house to be energy efficient so would be prepared to pay for new designs and calculations etc. My only concern is getting them done for the full application on a site that I wouldn’t own yet just in case something happened with the application.