The job will begin in earnest later this month and Mr Dowling said it should be finished around March but would cost less than the $12 million originally estimated.
Water intrusion had not affected the buildings' viability and they were still structurally sound, he said.
The complex has a number of leaky building risk factors, including monolithic cladding and complicated design and roof details. It was designed by Ignite architects of Parnell and is owned by a number of investors.
Gareth Fraser of Colliers said the centre would be refurbished to restore it to a prominent CBD retail and commercial precinct.
"Chancery is now approaching 12 years old so the time is right to give the precinct a new lease on life. The body corporate is therefore implementing a programme of refurbishment works which should be completed in time for this coming summer," he said.
Chancery's developers were Richard Kroon and Brian Mead's Westmark Group and Mark Lyon's Mission Corporation. The precinct was built by Multiplex Constructions (NZ), renamed Brookfield Multiplex.