The cost of the average flat in Britain has shot up from £157,172 in 2004 to £208,169 in 2014, driven by first-time buyers purchasing flats in London.
More super-prime property developments in the capital are also pushing up prices.
Peep through the keyhole into some of the city's most exclusive one-level homes.
One, Hyde Park, Knightsbridge
Guide price: £65m
This five-bedroom apartment comprising of 9000 sq ft overlooks Knightsbridge to the front and Hyde Park to the rear, on the market with Savills.
Facilities within the complex include a grand entrance lobby, 24 hour security and concierge services as provided by The Mandarin Oriental, park library, business suites, entertainment room/dining area, private cinema, games room, wine storage, fully equipped gymnasium, swimming pool and spa facilities, underground storage and secure underground parking.
The Penthouse, St. James
Guide Price £32.5m
A nine bedroom penthouse apartment that overlooks St Jamesís Park
It benefits from a large roof terrace with views of the central London skyline including the Houses of Parliament, the London Eye, Horse Guards, Big Ben, the Gherkin, the Shard and Nelsonís Column.
Art by Warhol and Damien Hirst hangs on the walls - which is up for sale by separate negotiation.
Gledhow Gardens, Chelsea
Guide price £7.5m
A 4 bedroom split level architect designed apartment with generous ceiling heights Ė and itís very own tranquil personal spa.
Guide price £9m
A three bedroom tri-lateral apartment with direct views over Cadogan Place with a resident porter.
Accommodation includes an inter-connecting 65 ft triple reception room including a grand dining room at just under 35 ft long.
The flat also has an eight-person lift.
Price growth for flats tower over other types of home
Apartment prices have soared by more than £50,000 over the past ten years, according to new data from Halifax out today (Monday).
In fact a flat is worth more than both a terraced house and a semi-detached.
This new data coincided with an announcement from British Land announcing that the property group has sold 18 apartments at record prices.
Britain's largest commercial and residential real estate company has exchanged on the sale of its super-prime development, Clarges Mayfair, reflecting an average capital value of £4,750 per sq ft as well as setting new highs for values in Mayfair.