What I think I really need is a life coach to help me with all the big decisions I am trying to make in my life, but as a start I thought I would see who you think... 
So I live in North London is a pretty expensive area. I have a decent sized two bedroom flat in a really lovely street. It's only DD and me, so objectively we have enough space. But what I would really love is to buy a house. The problem is (and I know everyone has this problem in London !!) that it would mean taking on a much bigger mortgage. Before anyone tells me that I should just move to a cheaper area, let me say that I have no family in the UK and so as a lone parent to a small child it's important for me to be fairly close to work. Also, I have had a fairly difficult few year and I don't think I could face moving to completely different area. Ok, so after that long intro, here are the pros and cons - you be the judge:
Arguments in favour of staying in my flat:
- lovely street
- nice flat
- I can manage the mortgage without any problems
- have quite a lot of savings to cover mortgage if I lost my job/got sick, etc.
- I could sell my flat for about 500,000 but to buy a house only a bit bigger than my flat, I would need to spend 750,000 (plus stamp duty)
- buying a house would use up all my savings plus some money from my parents
Arguments in favour of buying a house:
- my flat is very nice but in an old building and so we have to be very conscious of not making too much noise and no jumping/dancing out of consideration for neighbours (they have complained in the past)
- so would love to be in a house with no one below us to worry about !
- a spare bedroom for my family when they come to visit (currently have to sleep in the living room)
- outdoor space