Fireplace

The showpiece in the new bathroom is the floating vanity with an integrated sink carved from a block of Nero Marquina marble.

The new bathroom is in the former bedroom, and it’s primarily used by the bedroom occupants.

Now, a short hallway joins the two bedrooms and shared bathroom, which is through the door to the left. “It’s large enough to feel like the loft that it is, but also intimate in these back areas,” says Watts.

Floor-to-ceiling shelves and storage bookend a cabinet that conceals the television.

The oak stairs and railings were built by the sisters’ carpenter father, Mikal, with the help of a contractor.

A relaxed living room with outdoor access occupies the addition.

A ribbon-like spiral staircase leads from the open-plan living area to the second level, where the bedrooms are located.

The stairs are one of the best parts of the renovation and were assembled on-site, stretching from basement to the top floor.

This open steel staircase design helps to preserve the stunning views, letting in plenty of light for a bright, continuous look. This simple aesthetic offsets the textured black-stone wall that bisects the contemporary home designed by Safdie Rabines Architects of San Diego, California.

This custom spiral wood staircase comes from the mind of architect Fred Babcock. His redesign of this modern log cabin in Salt Lake City, Utah, contributes to the home’s bright interior without blocking any natural light. The stairs’ organic light-toned wood blends beautifully with the cabin’s interior colors, flooring, and stonework.

The team took down the solid walls that separated the living room from the adjacent dining room, and opened up sightlines between the living room and the upper floor.

Outside of wonderful natural lighting, the living room is warmly lit by antique wall sconces and a large brick fireplace.

A double-height glass atrium connects the chef's kitchen with the landscaped backyard.

The dining room sits just steps away from the kitchen and features custom stained glass.