I also found this: http://www.londonpropertywatch.co.uk/avg_prices.html SE22 doesn't appear to be near the top 20, but certainly more expensive than average. Although it's hard to draw meaningful conclusions, as this doesn't distinguish between property types (e.g. flat/house or ex-council). For instance, if you look at 3 beds, Brixton, Ealing, Blackheath are all cheaper than SE22 which doesn't sound right to me.