Work to replace unsafe tiles on The Terrace on Grantham Street will begin on October 10.
The city council agreed to fund the work at a Full Council on August 9, after slates began falling off the building, making it unsafe for tenants and the public.
Since, there has been netting and scaffolding placed around the building to protect people.
The scaffolding will remain until the work, costing £415,000, is complete.
The Terrace, built five years ago, is owned by the City of Lincoln Council. An investigation last year found the slates used are prone to delamination.
Work on the building, which will be undertaken by Mansell Construction Services, was delayed due to problems finding the right replacement tiles.
The council have since decided on ceramic granite due to its affordability, compatibility, weather proof element and planning permission compliance.
Director of Development and Environmental Studies John Latham said: “We are incredibly pleased to now be at the stage of commencing the work to replace the cladding at The Terrace.
“The scaffolding was necessary to protect the public from any further faults in the material, and we thank the businesses, tenants and visitors to The Terrace for their patience.
“It has taken longer than we initially expected to undertake a full investigation and find a suitable material, so we are very pleased that we can now start the work to return this flagship building to its intended state as quickly as possible.”
Work is expected to be completed in December.
The Terrace is situated in the Cultural Quarter of the city, and offers 50 workshops, studios and offices to businesses as well as conference rooms and a cafe.