First created to value the environmental costs stemming from development plans, the adapted HEP aims at valuing environmental costs and benefits through a non-monetary unit, the habitat unit. With regard to the creation or restoration of a natural area, the valuation of environmental benefits is grounded on the number of habitat units matching a better supply of ecosystem services. But such a plan may generate other benefits for the inhabitants of nearby towns as well; recreational benefits for instance that would be perceived by the population. These benefits can be measure by traditional economic valuation method, such as choice experiment. We thus combined the adapted HEP with choice experiment on a same study site. This allows us to test the potential complementarity between the two methods and to identify potential risks and benefits of such a double valuation.