The BEEN project work was structured into five work packages (WPs):

• WP1 - "policy", provides the frame of reference for the whole project, as it deals with national policies in relation to EU goals.
• WP2 - "technique",
• WP3 - "legislation and institutions"
• WP4 "financing" strategies and instruments were elaborated, that are crucial for the implementation of energy efficient renovation of the building stock.

WP2, WP3 and WP4 were closely connected with

• WP5 - "best practice projects", where the strategies and instruments were transferred into practice, i.e. tested in three best practice projects for energy efficient refurbishment of residential buildings.

The themes that were dealt with in the WPs are the key areas for the process of EER and the initiation of successful refurbishment projects depends on the combination of methods and tools from these fields.
The approach of BEEN was that five BEEN partner had taken over responsibility for a WP and in this context also for the documents to be elaborated in the respective WP, so called WP Leadership.