The project, which started in November, was a race against time, with Knox College Commission chairman Dr John Kernohan saying last year it was not certain it would be finished by the time students returned.
Dr Kernohan said on Friday all earthquake strengthening at Knox College was complete, with the main building brought up to more than 80% of new building standards (NBS) for earthquake resistance. Before strengthening began, the building was rated at less than 20% of NBS.
Most students were expected to have moved in by the end of this weekend, Dr Kernohan said.
Comments from those who had already been through the new facilities had been ''very favourable'', he said.
The project also included the addition of 63 new rooms at Knox and Salmond, all of which had been taken.
''We've got a full house,'' he said.
A formal dedication ceremony is set take place next Sunday, when Moderator of the Presbyterian Church the Rt Rev Ray Coster will dedicate the refurbishments and the new buildings.
The Rev Dr Selwyn Yeoman will also be formally installed as the master of Knox College in a ceremony at Knox Church on Wednesday.