oneROOF is a Germany-based organisation developing an online directory and network for people and businesses involved in ecological and circular construction. Its stated aim is to connect construction professionals and clients, and to make knowledge about sustainable building more accessible across the industry.38
The platform’s directory helps people planning a building project find architects, other planners, tradespeople and producers working with sustainable methods and materials. It highlights specialisms such as timber, straw and clay, as well as circular construction, and includes professionals with decades of practical experience.1 Its intended users also include building owners, trade and professional associations, manufacturers, and people working in architecture and construction.1
oneROOF’s co-founding team includes Caroline Prange, an architect and product developer, and Tobias Drehkopf, who is responsible for the technical development of the network and knowledge platform.3 The organisation describes itself as young; a Berlin startup incubator lists its start as 2025.58 Its public imprint names Caroline Prange as the responsible contact, but the available sources do not establish a registered or headquarters address.2
The directory’s focus is Germany, with professionals listed in locations including Berlin and Uedem; the platform also says that planners can be found beyond their immediate area.14 Its purpose extends beyond listings: oneROOF says it aims to encourage knowledge transfer, support innovation in sustainable construction and help connect project partners.3