Yeh thought so - the market for very expensive high end conversions and purpose built maisonettes has dropped significantly I’m afraid - all across London. Expensive areas like Wimbledon, Earlsfield, Clapham, Balham and then further in to Kew, Ealing etc has all dropped to more reasonable levels. I would be inclined to take agents advice (cumulative over three different firms) as there really is nobody better to advise you despite the added BS.
I saw the market rise over 30-40% in three years from 2013 and then mid last year it stopped. Abruptly. Now, your London property is worth either the same or less than it was for example in jan 2016.
Yeah, that was what I was hoping to have rubbished by the estate agent, but it seems to be the case. We have a good relationship with the agents who sold us the place 7 years ago, so we'll get them round to have a look. I'm not too disappointed to be honest, as we'll likely be renting it out, although it would be nice if all property prices in London/UK moved up or down in line with our property - annoying that it seems to be primarily our flat type that has dropped! As we've got our deposit sorted for our next move, a countrywide correction would probably suit us.
I recall seeing the value of our property go nuts around the 2013 mark - makes my slightly disappointed that we didn't spend a bit more and get a house round this way. Only makes sense for London to be righted given how much it's grown in recent years.