The work, which is scheduled to begin on Monday 21 September, is the final part of a wider project commissioned by Jersey Property Holdings to support the Fort Regent rock faces.
Work is due to begin on Monday 21 September and is expected to be completed in March 2016.
During the work there will be the temporary loss of parking spaces, with 20 spaces due to be lost in the initial stage of the works between September and November.
Pedestrian footpaths will remain available to use and there will be access to motorbike and bicycle parking areas throughout.
Meabwhile, work will be suspended between 30 November and 4 January to allow more parking spaces for short-stay Christmas shoppers.
The contract was appointed to Geomarine Ltd by Jersey Property Holdings.
Transport and Technical Services Minister and Assistant Treasury Minister with responsibility to Jersey Property Holdings, Eddie Noel, said: ‘The final stage of this project will ensure the long-term stability of the rock face around Fort Regent and ensure the safety of the public using Snow Hill car park.
‘We are pleased to be able to award the contract for this work to a local company through a competitive tendering process.’
