Spectacular Modern Open House in Beverly Hills, California by XTEN Architecture This residence is embedded into a sharply sloping hillside property, a challenging site that led to the creation of a house that is both integrated into nature and open to the city beyond. The structure and detailing of the house is more complex than it appears. Extensive grading and terraced retaining walls were developed to extend the first floor living level into the hillside and to create a garden terraces on each level. Steel beams were set perpendicular to and into the hillside to achieve the backspans necessary for the large cantilevers at the front of the building. Lateral steel clear spans fifty feet between these beams to create double cantilevers at the leading edge of the house and uninterrupted cinematic views over the city. Front, side and rear elevations of the house slide open to erase all boundaries between indoors and out and connect the spaces to gardens and terraces on three levels.