Lot 31 House is a minimalist house located in Mirandela, Portugal, designed by ADOFF. Located in a context of urban expansion of a residential area of Mirandela, this lot had a well-defined set of rules in relation to implementation, volume and clearances. Therefore, the design quickly developed into a compact, linear volume organized on a square base plan of 11×11, where two floors were designed. The study of the voids was a guiding theme in the architectural design, the setback of a glass plane on the facade sets a new vertical profile in the design of the elevations, this depth gain inside results in space for cabinets and technical areas, outside there are small balconies, permanent shading is also crucial, the control of natural light / temperature and establishing more privacy in the visual relationships between exterior and interior.