Most housing is more expensive per square meter in Central London, but the housing in Central London tends to be significantly smaller on average except for the wealthiest enclaves pulling the averages drastically up, and this is then further obscured by council housing.
Put another way: Where I live in Outer London, most housing apart from a handful of conversions and some council blocks until recently started at 3-bedroom houses with gardens. There are now a few large blocks targeting renters that include smaller flats by the station, but they're all marketed as luxury flats.
A walk further out and the 5+ bedroom houses and mansions lining private sports grounds and expensive private schools start. A little bit further you get the private roads leading to private mansions alongside private primary schools.
Put another way: Where I live in Outer London, most housing apart from a handful of conversions and some council blocks until recently started at 3-bedroom houses with gardens. There are now a few large blocks targeting renters that include smaller flats by the station, but they're all marketed as luxury flats.
A walk further out and the 5+ bedroom houses and mansions lining private sports grounds and expensive private schools start. A little bit further you get the private roads leading to private mansions alongside private primary schools.