The use of different construction materials led to the windows taking a variety of shapes in each tower. The concrete block tower is broken up by rectangular and slit windows, combined with small windows cut out of the corner. The joinery used on the glass tower divides the form into functional, opening windows while the changing grid pattern also gives each section visual interest.
The structure is divided into two areas with different functions a home office and garage occupies the ground floor, with the owners' residence above.
The home office takes up the lowest part of the glass tower. It is a double-height space, set into the slope of the land. The main entrance to the house is at first floor level. From the entry, an open railing offers a view down into the office.
Above the office is another double-height glazed space. This is the formal sitting room, which has an immediate view of the fir trees. Gray describes this room as being like a tree house. It connects to the open-plan kitchen and family room. A unit of cabinetry, built around a structural column, divides the more formal sitting room from the family room, where the owners watch television. A double-sided gas fireplace warms both spaces.
"The sitting room is an interesting, three-dimensional space. Architecturally speaking, I felt it was important to have something of this volume in an otherwise compact floor plan."
The two balconies open off the kitchen and dining area. The larger of the two has an unusual asymmetrical shape, and is big enough for a table and chairs, while the other is just large enough to step out onto. It overlooks the garage, meaning the owners can step out from the kitchen to see who is coming up the driveway.
The interiors show Gray's predilection for exposing a building's structural materials, such as the concrete and blocks. In almost every room, the ceilings are exposed concrete, as are the structural beams and columns.