Work is due to begin during the next fortnight to refurbish the New Cooks Kitchen head frame at South Crofty.
The Cornwall Council led project will also tackle two Grade II listed engine houses at Chapple's Shaft.
CORMAC Contracting Ltd and specialist subcontractors have been appointed to put up scaffolding around the head frame.
Refurbishment work will include grit blasting, repainting and replacement of some steelwork.
The engine houses will be re pointed and the masonry made safe.
Stephen Rushworth, Cornwall Council's portfolio holder for economy and regeneration, said: "This long awaited project will play a key role in continuing the regeneration of this part of Cornwall.
"The council has worked with a range of partners to make this happen and I look forward to joining the local community to celebrate the successful completion of the works in the summer."
Kym Willoughby, Cornwall councillor for Carn Brea South added: "I am delighted that works are commencing for the restoration of the New Cook's Kitchen headgear and the engine houses at Chapple's Shaft.
"These works secure the future of several of our iconic landmarks and further the work already accomplished within the last four years to improve the gateway into Pool.
"I welcome the further developments in mining operations and look forward to seeing this progress further at South Crofty."
New Cooks Kitchen headgear was built in the 1950s and was used for winding men and materials in and out of the mine.
Cornwall Council has signed a 60 year lease on the head frame and engine houses and is responsible for their maintenance.
Alan Shoesmith, chief executive of Western United Mines, which owns South Crofty, said: "I am very pleased that this restoration work is about to start."The retention of the landmark iconic New Cooks Kitchen head frame is simply essential and we are delighted to be collaborating with Cornwall Council in its conservation. The commencement of this work is another significant step in the steady progress of both local regeneration and mine operations."
The work is due to be completed by July.