The Vaults Tower is a residential project in the heart of London, showcasing a high degree of modularity to optimize off-site construction methods. Its vaults are designed as modular units, constructed off-site and assembled on location to minimize formwork use, reduce CO2 emissions, and elevate finish quality. These vaults also serve to frame internal views and act as thermal mass, enhancing the tower’s energy efficiency. The terraced gardens provide shading, reduce solar exposure in summer, and promote a sustainable, green living environment. This tower sets a new standard for eco-friendly, off-site fabricated residential developments.