I had a survey done on a 20 year old house, which I purchased – but quite honestly it (the survey) was rubbish (and not worth the money).
Modern houses (not high-end quality) are built using the cheapest materials they can get away with. Chipboard is used for floorboards which results in the inevitable creaking and even breakage that would not occur with conventional tongue & grove solid wood floor boards.
So my advice is to carefully inspect the upstairs (and stairs) flooring of each room for obvious defects. If you can get in the loft, take a look for any dampness due to rain getting in and the state of the loft insulation.
If the house has a combi-boiler, check that it works correctly, providing hot water and heating all the radiators, otherwise this could be an expensive repair.