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This paper presents an approach towards the development of a service-orientedplatform for semantic enrichment of indoor point clouds. It mainly focuses onintegrated methods for the capture of as-is 3D point clouds using commoditymobile hardware, classification of point cloud clusters using a multiview-basedmethod, geometric reconstruction of room boundaries, interactive 3Dvisualization, sensor data visualization, and tracking of spatial changes and userannotations via a secure ledger. Implementing the methods in a prototypicalweb-based application, we demonstrate our approach for the semanticenrichment of indoor point clouds and the generation of base data for DigitalTwin representation.