The Environmental Value Look-Up (EVL) Tool is a searchable database which contains indicative monetary values for a range of environmental impacts. The unit values in the tool are based on a review of over 350 UK valuation studies that have been conducted since 2000. The tool was developed by eftec (Economics for the Environment Consultancy) for the Department for Environment, Food and Rural Affairs (Defra) in England - it is therefore endorsed by Defra. It was developed to help analysts take better account of environmental impacts in government appraisals but it is also relevant to private sector and non-governmental organisations with an interest in using economic valuation evidence. The EVL Tool is intended as a first-cut, rapid analysis of the economic values of environmental impacts and for including secondary or incidental environmental impacts in appraisals that might otherwise be overlooked.