The living room in the existing home had wood ceilings with exposed beams. Johnson wanted to maintain these and other historic details, so he decided to keep the existing house in tact and build the addition floating above it.
Johnson had renovated the kitchen in the original 1950s home, which now functions as a separate rental property.
The home's new exterior is crafted from Hardie Panels and asphalt shingles. A garage on the left side of the facade is concealed by the vertical members of the Hardie Panels.
The upper level addition contains an open living area with kitchen and dining. The wall casework is birch plywood and the grey casework is painted marine grade plywood, both were designed and built by Johnson.
During construction, Johnson and his family lived partially in an Airstream trailer in their front yard.
In Johnson's daughter's room, he used birch plywood for the built-in wardrobe and desk. The chair is maple and steel and was designed and fabricated by Johnson.
For his son's room, Johnson used walnut plywood for the built-in desk. He also used walnut for the chair.
In the living area, Johnson's wife sits on a rocker he crafted out of maple. The couch is from Design Within Reach and the coffee table is by Roy McMakin. The pendant lights are from Muuto.
On the ground level, Johnson created a home office and a workshop space. Shelves in the office are IKEA, and the plywood desk and mahogany chair were made by Johnson.
A stair from the lower level leads directly up to the covered porch, with the stair tucked behind the kitchen. The outdoor dining table is by Loll Designs and the chairs are from IKEA and Sundso.
The kitchen contains a hidden door leading to the primary suite.
In the primary bedroom, a small built-in desk overlooks the exterior stair. Johnson crafted the desk from birch plywood and the chair from maple. The lamp is by Greta Grossman and the chair below is from Cherner.
In the primary bath, green Dal tile complements birch plywood walls.