Residual Studio

Residual Studio is an architecture, design and research firm based in Lisbon, Portugal, dedicated exclusively to sustainability and the circular economy. Founded and led by Katia Talento, a PhD architect and entrepreneur, the studio develops projects that go beyond conventional design by prioritising the health, comfort and wellbeing of the people who will inhabit or use the spaces it creates. The team works across residential, commercial and tourism sectors, guiding clients through a structured process: an initial contact, a conversation to understand the client's vision for an ecological project, and finally the delivery of a sustainable, healthy and distinctive architectural space. Their approach addresses common shortcomings in conventional buildings, such as poor indoor air quality, inadequate thermal and acoustic insulation, high energy costs and vulnerability to climate change, by applying circular economy principles, natural and eco-friendly materials, and energy-efficient design strategies. Beyond direct architecture commissions, Residual Studio is also involved in research related to sustainable design and waste reuse in construction, and shares knowledge through blog posts and news updates on their website. Their portfolio includes renovation projects such as a house and oil mill in the Alentejo region built with local and natural materials. With a strong presence on social media and professional directories, the studio positions itself as a partner for individuals and businesses who want to invest in environmentally responsible spaces that also generate long-term savings on energy and improve quality of life. Residual Studio operates as a small, specialised atelier rather than a large architecture firm, emphasising a close, personalised relationship with each client throughout the design process.