The official, identified as Chandrakant Borse, was arrested late last night by the Thane unit of ACB, an official press release said.
"The complainant in the case wanted to escape the demolition of an unauthorised structure constructed by him in the township and approached Borse for it," Deputy Superintendent of Police of Thane Unit of ACB, Anjali Andale, said.
However, the officer demanded Rs 50,000 for the work, following which the complainant approached the ACB.
The Assistant Commissioner had been charged under sections of the Prevention of Corruption Act, 1988 and an offence has been registered with the local police, the release added.