In the UK buyers generally just see the structure and pay for what they think its worth, they tend not to think about the land (and whatever value it might also have) it sits on. Perhaps the exception to this would be garden size if the property isn't a flat (apartment).
The reason for this is that it's pretty damned difficult to separate the two, especially physically. Planning laws generally discourage complete demolition of dwellings unless they're pretty much near collapse or there's been a fire that's gutted the place or in more extreme circumstances perhaps all or part of the house has fallen into a sink hole.
In the UK, residential property (the structure bit) is, and has for a long time now been seen as an appreciating asset/investment. As I already said earlier, property here, if lived in and sensibly maintained, isn't considered something that "wears out" like a car body.
It sounds like you're not from the UK so maybe all this is an alien concept.
Edit: I forgot to mention that things get a wee bit more complex, especially in England and Wales because whilst you might own the structure, it's quite common that don't own the land it sits on. This is known as a leasehold, as opposed to a freehold where you the purchaser own the land as well as the building. Buyers of properties that are leasehold purchase their dwelling (typically with a mortgage) but also pay an annual ground rent to the leaseholder by way of a very long term lease (say 99+ years). Once upon a time the ground rent on the lease hold used to be a nominal amount of money, say GBP100/year. However...capitalism being capitalism, it's becoming more common for leasehold ground rent to be seen by certain investment houses as a nifty way of getting paid for doing bugger all. This can and has caused annual ground rents to increase to quite piss-taking levels.
There are some attempts to get parliament to reform this leasehold situation after it was found that new-build housing estates were being sold to buyers on a leasehold basis but the leasehold condition is not made clear to purchasers. It's sneaky, and another way for house builders to extract another bundle of cash by selling off new-build estate leaseholds to some offshored company for a tidy sum leaving the buyers high and dry. It's often possible to buy out the leasehold, but even in the first year of ownership the cost can be prohibitive, especially after shelling out for your new house. It's not unheard of for leaseholders to charge say GBP5000-7000 in the first year and then double the cost each year afterwards, often locking buyers into the leasehold until they're able to sell the property. Then there's also problems and costs associated with renewing a leasehold, but that's a whole other expensive and morale sapping thing.