42watt

In a market full of complexity and empty promises, 42watt makes energy-efficient building modernization simple, reliable, and actionable. We help property owners understand what to do and get it done efficiently. We combine deep technical expertise with clear processes and smart digital tools to turn complex projects into structured, end-to-end solutions, from independent advice to implementation and long-term optimization. Our vision is to become Europe’s trusted partner for sustainable building modernization. Our mission is to make modernization simple, reliable, and efficient, and to help drive a climate-neutral building sector by 2045.