The Beatles legend lived with his family at 20 Forthlin Road, Allerton from 1955 until 1964 and spent eight days a week learning to play trumpet, piano, guitar and drums within its walls.
It was in the unassuming house where the the Fab Four would come together to spend a hard day’s night writing and practicing more than 100 iconic songs including Love Me Do, I Saw Her Standing There and When I’m 64.
The door – which is missing its locks and letter box but retains the number 20 at the top – was bought by current owner Glen South from Sheila Jones, who moved into the house after the McCartneys left.
In 1995 the National Trust bought and refurbished the house to look just like it did when the McCartneys lived there – right down to a replica of the door.
Dominic Winter auctioneer and valuer Chris Albury said the door was difficult to value, but was expected to fetch up to £5,000.
"There are millions of Beatles fans who would like to see the door, touch it and be photographed in front of it, even if they don't actually want it," he said.
"It is a unique and iconic item and there will be more obsessive collector fans out there who will not hesitate to bid keenly."
Chris added this was the second door from the Liverpool house to go under the hammer, with the door to McCartney’s bedroom selling for £2,875 in 1995 before going on display at London’s Hard Rock Cafe.
"For me this would be the more important door of the two," he said "but it's now for the market to decide what it's worth today."
by Ian Craig