A nearly continuous glass façade on this Lake Washington home creates the effect of a single luminous volume, glowing from within like a jewel box. The design maximized the home’s footprint on its tight infill lot, with the extensive use of glass visually lightening the volume. The home’s three levels appear to merge together behind the floating glass façade. Blackened steel on exterior window mullions and siding continues inside, where a refined palette gives a sense of modern elegance.