Austrian architect Stefan Marte’s add-on to his family home contains three stacked bedrooms for his young daughters. The interiors of the Rapunzel-inspired structure match those of the main house, with simple birch plywood surfacing and minimal accoutrements. The Corten exterior stands in contrast, evoking a suit of armour wrapped around the all-glass east facade. The three damsels can climb down and walk through an underground passage to reach the main house, or run outside and splash around in the Corten pool. marte‑marte.­com

Location: Vorarlberg, Austria
Firm: Marte.Marte Architects, Weiler, Austria
Team: Bernhard Marte and Stefan Marte