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.”

Two Supertri champions crowned in Jersey
Jersey RFC open season with defeat
Supertri returns to Jersey for all-star showdown
Women jailed for importing £240,000 of synthetic cannabis in spare tyre
Jersey's first Grief Disco offers new way to remember loved ones
New courtrooms created at Jubilee Wharf
Three-hour rescue of fallen climber at Grosnez
Ball court upgrade in memory of late Jersey basketballer