Brownfield redevelopment provides opportunies to build sustainable cities for the future. However, potential benefits of brownfield redevelopment are underestimated whereas costs are overestimated ; brownfields are therefore barely reused. Besides, economic valuation methods are struggling to determine ex ante benefits and in particularly collective benefits and those which are related to non-direct use. In order to address these limitations, we develop an original methodologial framework which combines economic valuation methods questioning individual preferences and participatory echniques. Focus groups and discrete choice experiment are first employed to assess individual risk attitudes and preferences, and then multi-criteria decision analysis is used to compare individual preferences with collective preferences in order to determine a consensual solution in the case of a brownfield redevelopment project. This methodological approach should improve en ante skakeholders’ involvement and hence social acceptability of land-use plans.