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Should I buy a house or am I making silly assumptions that I can afford it?
Having convinced myself that there is no point of paying someone's   else mortgage Somewhat rhetorical this many years later, but I expect some other kid forcefed the obsession with propping up the housing market might be repeating the nonsense about "paying someone else's mortgage" and read this. Will you be buying your own farm to grow your own food, or are you happy with people using the money you spend on food for a mortgage? How about clothes? Will you be weaving your own clothes because you don't want money you spend on clothes to pay someone else's mortgage? What's special about the money you pay for rent that you get annoyed at how someone else spends it? Don't get a mortgage just because you don't like the idea of how other people might spend the money that's no longer yours after you pay them with it. As an aside, at your age with your income and no debt, you could be sensibly investing a lot of money. If you did that for five years, you'd be in a much better position that you would be tying yourself to whatever current scheme the UK is using to desperately prop up house prices.