The Janelas Verdes represent (in the way that Eça de Queiroz is master) more than location or palace, “a social type”. Place of old families, it receives the court coming from Brazil in the 18th century and becomes one of the most qualified historic neighborhoods in Lisbon. In addition to the social and architectural interest (which is of interest to the characterization of Os Maias), there are several embassies and public buildings installed in noble houses or convents, such as the Museum of Ancient Art. Until the beginning of the pandemic, the neighborhood was animated by tourist interest and the appearance of design stores, art schools, and exhibition spaces. “Casa das Janelas Verdes” deals with the reconversion to permanent housing of one of these spaces that was left unoccupied – the art gallery “Shiki Miki” – located on the ground floor of a building with current architecture from the 60s, designed by Arq. José Marques de Brito, according to the Lisbon Municipal Archive. From the outside, the existing stonework was preserved and the frame design was adapted to the new use, which is now set back in relation to the facade plane and with tilt-and-turn windows, which provides greater security, privacy, ventilation, thermal protection, and acoustics. The entire structure is painted in dark green, and in the remaining space, flower pots for planting herbs were integrated, in reference to the architectural values of the place. Inside, the intervention was quite punctual and aimed at cost containment. The supporting structure of the building was maintained, the location of the technical staff, the existing water points, and the use of noble materials such as wood or natural stone were privileged. In the transition to the interior and privileged connection to the street, in the most exposed, illuminated, and ventilated space of the house, the kitchen appears, which also functions as an atrium. Here, the presence and delicacy of the design of the metallic handrail painted in green, which accompanies the access by stairs to the lower floor, establishes the ultimate relationship with the street and the characteristic environment of the neighborhood and serves as a transition between social and private spaces. In the transition, the wall plan that accompanies the stair access develops in a curve and reveals the lower floor. And finally, next to the access to the sanitary installation, the technical areas and storage were accommodated, both hidden by a curtain. In the sanitary installation, an attempt was made to expand the shower space and provide comfort to the space, through the use of wooden cabinets and natural stone countertops. On this floor, the rest of the program is distributed in a free plan. The openings are reduced, and all floor and wall planes are painted white. This option makes it possible to reflect light into the space without compromising privacy. In the empty spaces, between the structure, cupboards are added, favoring the free enjoyment of the space, reducing the dissonant elements. In the future, if necessary, curtains can be added to separate spaces, as indicated in the project.