Thank you. my apologies if the above was unclear. another way of putting it is that flats are typically built one on top of the other where as houses are typically built one next door to the other.
if this is indeed a flat as you say - i.e. there is another flat above or below it, then it is unfortunately not possible, nor indeed is it desirable for reasons I will outline a moment, to buy a freehold flat. The reason for this is that freehold titles make little room for regulating obligations and rights as between different owners - for example what if your flat is built ontop of someone elses and he doesn't maintain his flat so it starts to crack. your flat is built on top and so therefore relies upon the flat below for support but if both are freehold, you cant force the flat below to maintain his property if it is freehold and your flat may eventually fall down but there would be nothing you could do. This is one example of many.
This is why mortgage lenders will not lend on freehold flats and they are not desirable to buy.
leasehold titles were designed specifically to address situations such as the above in that they allow relations between different leasehold flat owners to be regulated so that you can rely on support of the main structure and so on.
There was a proposal some 15-20 years ago to create a new kind of ownership called Commonhold ownership which was designed to address at least some of the kinds of reservations you point out and create a sort of hybrid freehold ownership but it never really caught on for various reasons and only a tiny handful of properties adopt this type of structure.
So in summary, regrettably it is not possible to buy the freehold and you would not want to because you would not be able to get a mortgage or would you be able to sell it. What you can do is look to buy the freehold of the building if 50% or more of other flats in the building are privately owned and 50% or more of those private owners wish to join with you in the purchase. This would mean you are still a leaseholder but you own a share of the freehold which means that you can extend your lease without payment and have a say in how the building is maintained and so on.
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