20 Forthlin Road

20 Forthlin Road is located on the north side of Forthlin Road and forms part of a terrace of eight houses. It is a 2-storey house constructed of brick with a tiled roof and a central ridge stack. All the windows have been replaced by the Trust to be more in keeping with how the building would have looked originally; those to the front came from a house on the opposite side of the street. The 2-bay front elevation has a doorway to the ground floor right with a replaced, partly-glazed door and a flat hood above. To the first floor is a 6-over-6 sash window. To the left bay are tripartite, multipaned sash windows to both floors and to the far left is an alleyway shared with the house to the left. The rear elevation has a mixture of multipaned casement and sash windows to both floors and a replaced back door to the left of centre. Projecting from the right side of the rear wall is a high brick wall and plank and batten door, which provide access to the alleyway. Attached to this wall is a small, L-shaped, brick outbuilding containing an outdoor toilet and storage facilities.

Internally, the entrance hall contains the main stair flight, which has a closed string, plain newel post and stick balusters. There are 4-panel doors throughout, composed of four large square panels, but only one or two are original, with the rest having been installed by the Trust. The front ground floor room was used by The Beatles for composing songs. It has a glazed tile fireplace installed by the Trust and is partly decorated with Chinese-style wallpaper that was recreated from a surviving fragment. Double doors lead into a smaller rear room, which was used by The Beatles for rehearsing. The kitchen is set to the rear right of the ground floor and has an original quarry tiled floor. One of the cupboards is also original, but the rest of the units and a sink are later insertions installed by the Trust. The first floor has three bedrooms, a toilet and bathroom. The main front bedroom belonged to Paul's parents and has a built-in wardrobe, whilst an adjacent and much smaller front room belonged to Paul. Paul's brother, Mike had the larger rear bedroom containing a built-in wardrobe so he could also use it as a dark room. Both Paul and Mike's former bedrooms have a patterned linoleum floor that is possibly original. The bathroom and toilet have modern fittings.