Located in Rio de Janeiro, a new compact leisure annex has taken shape at the site of an original Oscar Niemeyer house. Designed by firm Siqueira + Azul Arquitetura, the project was formed through the acquisition of the next-door property, resulting in an expansion of the existing residence.Image: Andr NazarethImage: Ruy TeixeiraCalled Itana House, the approximately 8,611-square-foot annex appears to hover between the pool and garden. It was developed as three independent constructions and is fully interconnected by pathways, walkways, and stairs.Image: Andr NazarethImage: Andr NazarethThe faades of the main existing blocks feature large pivoting panels, allowing for a seamless transition between the indoor and outdoor spaces. These function through a custom structural scheme in an iron square mesh.Image: Andr NazarethThe project also features a circular oculus that provides views to the courtyard, while inviting natural light inside. The annex is crowned by a tower element...