Work to turn Broad Street into a pedestrian-priority zone will begin a week on Monday and last until next March.
The aim is to give the area a similar look to the recently completed King Street/New Street crossing.
The government has announced that the initial stage will be between Lloyds Bank and the Post Office, and will involve installing “high-quality paving, bespoke furniture, and enhanced greenery including tree planting”.
When finished, the street will be fully paved with a flush granite surface across its width.
Beginning on Monday 1 September, the work will last until next March, although there will be a pause over the Christmas period.
Infrastructure Minister Andy Jehan and St Helier Constable Simon Crowcroft said: “The continued closure of Broad Street to general traffic following the pandemic drew a mixed response from islanders.
“Many felt there was a lack of vision for the future of this area which was once the town’s high street, as well as the district of ‘La Grande Rue’.“
“We hope that you will engage with the project so that the best possible outcome for the character of this cherished street can be achieved.”
We hope that you will engage with the project so that the best possible outcome for the character of this cherished street can be achieved
Infrastructure Minister Andy Jehan and St Helier Constable Simon Crowcroft
Pedestrian access will be maintained, but cyclists will have to dismount when passing through work areas.
Buses that used Broad Street will be rerouted and temporary arrangements will be in place
for deliveries.
Further works in Broad Street are planned to take place in three phases, aiming for completion by the end of 2027.
Phase two will extend into the area around the Obelisk and Conway Street to Library Place.
Phase three will then continue the works from the Post Office to the Blue Note bar.
The final phase will extend down to Charing Cross.