Oitoo is an architectural practice based in Porto and Lisbon, Portugal, with a focus on the reuse and reactivation of spaces and territories. Founded in 2017 by experienced architects Laura Lupini, João Machado, Diogo Zenha Morais, and Nuno Baptista Rodrigues, the practice operates on two fronts: the office, which designs and builds projects, and the observatory, which researches and analyzes urban and territorial issues.

Oitoo's approach to architecture is rooted in the belief that under-exploited or forgotten places and buildings can be transformed to increase the quality of life and make a positive impact on users and local communities. This is evident in projects such as the Ground Floor House in Porto, where a former warehouse was converted into a four-bedroom passive house with a backyard garden, and Armazemcowork, a co-working office in a previously vacant warehouse that had been unused for 44 years.

The practice combines design and construction with academic activity and publications, such as the book "Yellowred" on reused architecture. Oitoo's work is characterized by a focus on local craftsmanship, sustainability, and the reactivation of urban spaces. By transforming neglected areas into vibrant and functional spaces, Oitoo aims to contribute to the revitalization of urban environments and promote a more sustainable and community-oriented approach to architecture.