Spatial planning data including urban, regional, spatial or zoning plans are not aggregated so far. Creating time series or comparative analyses on these data sets is not yet possible. The EU funded project Plan4business develops a service platform that can serve to users as a full catalogue of spatial planning data linked with other data sources such as statistics, OpenStreetMap, Urban Atlas and Corine Land Cover that are published as Open Data. The Plan4business platform will offer to clients not only the data itself in an integrated, harmonised and thus ready-to-use form, but also rich analysis and visualisation services via an API and an interactive web frontend. The users include mainly citizens, local authorities and real estate agencies. This paper introduces the problems of data integration and selected technical components of the Plan4business platform supporting data reuse and analysis.