DepartmentRevenue (Property Tax / Khata) — operational headJurisdiction notes—Emaildcrev@bbmp.gov.inWhatsApp—Office timing—Last verified—SourceGBA Department DirectoryPublic notesEmail, phone and 'Joint Commissioner of Revenue, NR Square, GBA' come from the LIVE property-tax portal, which already says GBA — post-reorganisation. One officer holds Revenue + Estate + Market + Advertisement.