Structural housing indicators provide (annual) information on underlying structural aspects of the housing markets, for example on the Number of dwellings, Vacancy/occupancy rates, Housing starts and completions, Housing transactions and the Type of tenure (owner-occupied and rented). National data are provided by National Central Banks, compliant with agreed target definitions but are not always fully comparable across countries. European aggregates are compiled by the ECB if the country coverage rate is 60% or higher.