Hounslow Civic Centre would be demolished and replaced with 750 homes, under new plans.
The council plans to move its headquarters from Lampton Road to a car park in Bath Road, beside Yates's pub, in Hounslow town centre.
The new seven-storey office block, incorporating a library and community resource centre, would cost £60.8 million to build, the council estimates.
The new building, scheduled to open in the summer of 2018, would be funded by selling off the council's exisiting HQ beside Lampton Park for housing. A total of 750 homes, mostly one and two bed flats, are proposed for that site.
The proposals are due to go before cabinet members on October 13, when they will be asked to approve the start of the bidding process for developers to carry out work at the two plots.
Should they agree, the council plans to choose a developer by next June, after which the successful bidder would have to submit a planning application before beginning construction.
The council claims its existing home is too large and costly to maintain, especially following a significant reduction in the number of employees in recent years.
It says the cost of running the new building, which would have 850 workspaces, would be £1m a year less than for the existing Civic Centre, which requires £17m of maintenance work.
Councillor Theo Dennison, cabinet member for finance, said in his report to cabinet that the new building would create a 'strong community space' and 'bring to an end the isolation of the civic HQ from the commercial centre of the town'.
