In graduation thesis we discussed brownfield site concept, overview good practises and described previous activities on this field in Slovenia. We presented used work methodology in detail, which almost matches with ongoing projekt »Comprehensive brownfields inventory and analysis methodology, implementation of pilot inventory and establishment of the up-todate register« (Lampič et al., 2016) methodology. We implemetated and analysed seven sites in Tržič municipality, which is convenient to brownfield site determination criterion. We compared inventoried sites with sites inventoried in 2015 in project »Establishing of a active spatial and functional degraded sites for the Gorenjska region« (Lampič et al., 2015). We showed diference in detail capture and type definition of brownfield between those two projects. We made a restoration and revitalisation suggestions for considered sites.