The untapped / hidden benefits of environmental policies are huge, this piece of research showcases and places a monetary value on the added benefits to our health, society and the economy that environmental investments and policy linked to energy efficiency can bring. Findings show that green policies can improve both our health and the economy and can go hand-in-hand. This study provides guidance to policy and decision-makers in developing a methodology for the inclusion of multiple benefits in a cost/benefit assessment of energy efficiency policy. It is envisaged that providing a macroeconomic understanding of the wider benefits of energy efficiency in buildings will encourage policy-makers and investors to develop and quantify the benefits of more effective energy efficiency policies and programmes and drive higher levels of renovation, thus supporting the EU's Renovation Wave. This Report provides the European Commission (EC), the national administrations in charge of implementing EU energy efficiency policies (such as the EPBD) in Member States (MS) and other decision makers seeking to include multiple benefits in their policies, building programmes and financial programmes with:• Information on identified benefits;• A methodology for an enhanced consideration of wider benefits, in particular in the calculation of cost-optimal minimum energy performance requirements under the EPBD; and• A toolkit to calculate and quantify / measure the monetary value of these impacts, from a policy and investor standpoint.