Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
property [ˈprɔpətɪ] n (possessions) со́бственность f (building and its land) недви́жимость f (quality) сво́йство
cpd
property developer застро́йщик
it's their property э́то их со́бственность
property market ры́нок недви́жимости
property tax нало́г на со́бственности
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.