Building Topology Ontology
W3C-LBD ontology for building topology — sites, buildings, storeys, spaces, interconnections.
Visit WebsiteBrowse the tree, filter it, or click any class to see just its corner of it.
Where this one tends to earn its keep.
Linked building data publishing
BIM to linked data conversion
Facility management knowledge graphs
Cross-discipline building data integration
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Smart Infrastructure.