Mountain Dwellings, is a project consisting of apartments above a multi-storey car park designed by the Danish architects Bjarke Ingels Group or BIG. The building is located in Copenhagen, next to VM Houses, completed by BIG and Julien de Smedt Architects in 2006.
The 80 apartments are arranged on a sloping “hillside” above the car park that has space for 480 cars.
Text from the architects:
How do you combine the splendours of the suburban backyard with the social intensity of urban density? The Mountain Dwellings are the 2nd generation of the VM Houses – same client, same size and same street. The program, however, is 2/3 parking and 1/3 living.
What if the parking area became the base upon which to place terraced housing – like a concrete hillside covered by a thin layer of housing, cascading from the 11th floor to the street edge? Rather than doing two separate buildings next to each other – a parking and a housing block – we decided to merge the two functions into a symbiotic relationship.
The parking area needs to be connected to the street, and the homes require sunlight, fresh air and views, thus all apartments have roof gardens facing the sun, amazing views and parking on the 10th floor. The Mountain Dwellings appear as a suburban neighbourhood of garden homes flowing over a 10-storey building – suburban living with urban density.
The roof gardens consist of a terrace and a garden with plants changing character according to the changing seasons. The building has a huge watering system which maintains the roof gardens. The only thing that separates the apartment and the garden is a glass façade with sliding doors to provide light and fresh air.
More info on archdaily
archiDE 
This looks like hollywood, only with artificial hills!