A Mexican company called AS/D have recently designed the PSJ building located at a shopping street in the city of Tlalnepantla, Mexico. The parcel of 900 square meters should be filled with commercial and office spaces. The building is composed of two main elements: a ground floor – a transparent volume that enhances an interaction between the interior and exterior and less transparent volume – the office floor. Vertical openings on the facade enable inflow of daylight to offices. Construction program was organised into three layers: underground parking enabling lightening and ventilation through elevated part, commercial spaces from 45 to 75 square meters organised around an inner atrium and a top floor that provides a space for up to 8 office spaces of different size, from 45 to 135 square meters. A gallery between the ground floor and top floor provides light to inner facades.