A constable posted in the building, which houses government offices, found Premlal Mohanlal Desai (50) in injured condition around 9.30 pm yesterday, police said.
Desai was taken to a hospital where he succumbed to injuries, said an official of Sitabuldi police station.
Desai was stabbed outside Suyog Building and he ran inside to seek help and collapsed, police said.
Police have registered a case of murder. Probe is on.