<human>: Give me the gist of the text in a nutshell

My Girlfriend and I own a flat in South London. We've been there for just over a year. However, we have had numerous issues with sound and general noise coming from our neighbours above us. We have tried talking and coming to some arrangement, but it's not perfect. Plus now, I think the neighbour above us is tired of being nice and just wants to play his music and make noise in attempt that we'll move out.

It's been going on for a while and now I feel it is seriously starting to effect our health and I rarely look forward to coming home most days; especially on the weekends. I fear it is turning into depression :(

The property itself is a small 1 bed flat in a new build development. Generally we hear nothing from the flats between us. It's just the flat above. If we could afford to, we would just move, but realistcly because we are in London. We can't afford to move for another 2-5 years.

I've been given a quote to insulate the ceiling by a private sound proofing company, but it's a tad expensive. I wanted to ask the reddit community if they have had any experiences like this and also if sound proofing helped them?

One last thing, we have thought about going down a legal route either at the company that built the property or the neighbour, we don't really want to do that, unless absolutely necessary. But if it helps, it would be interesting to know where we stand.
<bot>: Own a flat, we can't move out. Noisy neighbour above. Got a quote for sound proofing the ceiling. Is it worth it? What legal options do I have open to me as alternatives?