Chelsea Price: £12.5 million
A seven-bedroom home on Cheyne Place, with an indoor swimming pool, sauna and gym.
There is a roof terrace and garden on top of the eight-floor house, which has a private lift.
The master bedroom, with an en-suite bathroom and a walk-in wardrobe, takes up the entire second floor.
The 383 sq ft study is on the top floor. It has far-reaching views and a large round skylight that floods the room with natural brightness. Agent: Foxtons (020 7591 9000; foxtons.co.uk)