A building system for operating a building and managing building information, the building system comprising one or more memory devices configured to store instructions thereon. The instructions causing one or more processors to receive building data from one or more building data sources and generate a space graph based on the building data, wherein the space graph is a graph data structure comprising nodes representing entities and edges between the entities representing relationships between the entities. The instructions cause the one or more processors to ingest data values of the building data into the space graph, the data values associated with the entities, and perform one or more operations with the space graph based on both the relationships of the entities and the ingested data values.