Don't know what current lending policies are ( but does anyone), but it really does depend on what sort of work is to be done.
The general situation is usually this.....
If the house needs new decor and a new kitchen, but is a structurally sound house and the lending institutions valuation is the same as your purchase price, they don't give a toss if you do it up, or leave it as it is.
If the roof is leaking, or the electrics are dangerous, or the windows as at risk of blowing in in a storm, you will have to do that work for the house to be insurable, and they may insist that you do this work ASAP so will want you to have the money to do it.