M&S in St Brelade is set to become a Foodhall.
Sandpiper CI plans to convert the fashion, home and beauty store at Red Houses into two floors of food and groceries.
It says the proposed 'fresh market-style foodhall' will include an in-store bakery, flowers and wine shop.
There will be a 'collect by car' service.
If planning consent is given, work could start in the autumn.
The store will close temporarily for re-fit, and re-open later this year.
St Brelade would be the fifth standalone M&S foodhall in Jersey. There used to be a small food department in the basement of the existing shop at Les Quennevais.
An M&S spokesperson, added: “It’s brilliant to have the opportunity to bring M&S Food to even more customers in Jersey and the new store design would make shopping at St Brelade all that more enjoyable and convenient.”

Ballet based on Jersey legend comes to the island
New vibrant town workspace brings together desks with disco balls
Cocaine found hidden in parcel of candles
Manifesto booklets delivered to Jersey homes
Fertility charity platforms mental health help
Ombudsman issues advice about mis-sold car loans
'Music Muratti' for young musicians in the Channel Islands
Jersey celebrates 81 years of Liberation