lender's valuation is useless to you - it is limited to looking at very basic things and is not addressed to you in terms of reliance
10 year old houses will be just out of the pretty worthless NHBC or similar 10 year guarantee. they are also very likely to have been built "to a price" so look for failing double glazing, poor ventilation etc.
You could go for a Homebuyer's survey but they are always full of caveats ie we didn't go on the roof / get an electrician in etc etc but might spot any obvious problems.
if you have a trusted builder I'd ask him to give it the once over