A row of closets was demolished to make way for the new stair up from the existing first floor. Each bedroom was given a corner of the addition to allow for cross ventilation, and the bathroom occupies the fourth corner. Despite the confined footprint, even the central hall has an operable window to the outside.

New fiber cement siding with a rain screen shim covers the addition, protecting it from wind driven rain. Fiberglass windows with an interior wood veneer complement the alder trim at windows and doors. Sustainably harvested oak flooring is accented by walnut inlay striping in the master bedroom.

This project earned a Built Green 3 Star certification for its selection of low toxic and resource efficient materials, use of sustainably harvested lumber and flooring, an efficient hydronic heat system, a solar hot water heating system, and the builder's careful management of jobsite waste.