Totteridge has a London postcode (N20) and is only nine Tube stops from Euston, but to all intents and purposes it is a country village, with a parish church, cricket club, ponds, paddocks and even a working farm.
It also has pillared and porticoed trophy houses favoured by Premiership footballers and tycoons who cherish the well-connected area's rural charms and the privacy a home there can afford.
To this sylvan suburb has come 48 Totteridge Common
, built to look established from day one in a Victorian-Italianate style and sitting in three acres. It has a double-height entrance hall with marble staircase, bedroom suites, a library, au pair flat, wine cellar, gym, cinema and a glass-walled swimming pool with retractable dance-floor. The house has 16,000 sq ft of space plus garaging for the Bentley and Bugatti.
"Totteridge is the Beverly Hills of London; where else can you get this sort of space?" asks estate agent Nick Staton. Hampstead or Holland Park, perhaps, but it would cost twice as much as the £18 million Octagon is asking. Call 020 8445 3694.