Only 11 of the 25 departments of the West Bengal state secretariat, Writers' Building, would be shifted to an alternate location by the deadline of October one.
The 11 departments, mostly those headed by Chief Minister Mamata Banerjee would move to the 14-storey HRBC building across the river Hooghly in adjoining Howrah district, state secretariat officials said.
The seat of the administration, a heritage structure, would for the first time in its history move to an alternative location for major repairs, which would take a few months time, after its construction in 1706 for 'writers' or clerks which gave the building its name.
The 11 departments to be shifted would be the Chief Minister's office, cabinet room, office of Chief Secretary Sanjay Mitra and the VVIP waiting room.
Among others would be the offices of Home Secretary Basudeb Banerjee, Director General of Police Naparajit Mukherjee, Director of Security Virendra and CMO Under Secretary.
The office of the Finance Minister Amit Mitra and the excise excise department would also be moved to the HRBC building.
The Home (Personnel), Agriculture, Land and Land Reforms on, Information and Cultural Affairs department, Minority Affairs and Madrasa Education, Disaster Management and the state police directorate would move across the river.
The PWD department would coordinate the shifting to the HRBC which would be painted blue and white, the favourite colour of the chief minister, they said.
The departments of Urban Development, Labour, Law and Backward Class Welfare would remain at Writers' Buildings, while some were shifted to other buildings in the metropolis or in Salt Lake.
