This paper presents the GREENHOME environment, a toolkit providing several data analytical tools for metering household energy consumption and CO2 footprint under different perspectives. GREENHOME enables a multi-perspective analysis of household energy consumption and CO2 footprint using and combining several variables through various statistics and data mining algorithms. This elastic and multi-perspective analytics facility is an element of the originality of GREENHOME. To test GREENHOME, the paper reports on experiments conducted for modelling and forecasting energy consumption and CO2 footprint in the context of the Triple-A European project.