The online property field trial in Ireland explores how adding annual energy cost forecasts (based on the
property’s energy rating, size, and energy prices) to property advertisements influences sales prices and rents.
For the final sales price (final prices in Ireland are the result of a bidding process), results show a significant
increase in the efficiency sales premium in the treatment group – €2,608 for each categorical increase in
property energy efficiency (fifteen-category scale).1 For advertised sales prices and rents, we do not observe a
significant treatment effect. The results suggest that long-run energy cost labelling for property sales increases
the demand for more EE properties.