John, who died in 2011, was one of the original owners of a flat in Prince of Wales Court, Hove, and wrote many episodes of the legendary sitcom there.
The plaque will be unveiled next week by John’s wife Sharon and actress Sue Holderness, who played Marlene in Only Fools and Horses, will deliver a short speech about John.
The idea to put up a plaque originally came from John’s neighbour, Joni van Oortmarssen, and was organized with the Brighton and Hove Heritage Commission.
Joni and fellow organizers Pat Fortin and Liz Pile raised £1,500 to cover the cost of installing the plaque.
Sharon Sullivan said: “John, the family and I have always enjoyed our long weekends in Hove. Although it was his place of “relaxation”, John still liked to write there.
“We would like to thank our lovely neighbors for arranging this plaque in memory of John. We are all so proud of him and miss him everyday.
Pat Fortin said, “We know John loved living here by the sea, and we thought a blue plaque was a great way for fans to say thank you for all of these wonderful characters he’s created, who have made us all laugh so much over the years. .”
In addition to writing Only Fools and Horses, John Sullivan also created and wrote Citizen Smith, Just Good Friends, Sitting Pretty, Over Here, Heartburn Hotel, Micawber, The Green Green Grass and Rock and Chips. In 2005 John received an OBE for his services to the theatre.
Born in Balham, south London, in 1946, he left school at 15 with no qualifications and worked as a courier, car cleaner, delivery driver, journeyman plumber and used car dealer, before moving on. to get a job as a stagehand at the BBC.
Inspired by the work of Charles Dickens, John spent his evenings writing screenplays and while working at the BBC he met Ronnie Barker, who asked him to write sketches for The Two Ronnies, and the producer Dennis Main Wilson, who asked him to write Citizen Smith.
The plaque unveiling ceremony will take place at noon on Thursday, November 10.