A historic building in downtown Galt is getting a $12.6-million makeover.

Cambridge councillors approved the funding Monday night to turn the Water Street building, formerly a post office, into a library and restaurant.

The renovations include a 6,000-square-foot addition for extra library space.

The three-storey post office was first built in 1885, but hasn’t been used for mail purposes since 1936.

Since then, the building has housed various government departments and restaurants.

Its last tenant, the Fiddler’s Green restaurant, left in 2007.

More information about the plans for the renovated post office are expected next year.