Listed Grade l, Ickenham Manor is a two-storeyed house with a timber frame and walls of timber, plaster and brick, plus a three-storeyed stair wing of similar structure in the north-west angle, and a pair of two-storeyed brick wings, at the south-east and north-east corners respectively. All the roofs are tiled. The present occupiers (since 1961) are descendants of the Shoreditche family who owned the house from the 14th century until 1812.
The house is important in county terms because it and Headstone Manor in Harrow are the only 14th century dwelling houses to have survived in Middlesex, and it is the earliest still in domestic use. Several phases of building are detectable in the present fabric. The house began as an open hall house of four bays, lying east to west, to which a large cross wing was added early in the 16th century. The 17th century staircase gives access to each of the other wings at the first floor as well as to the next flight, while a tiny room has been contrived in the stair well. Most of the balusters are original. In the 18th century a small parlour extension was added to the south east of the cross wing, and a small service extension was added to the north east.
The oldest extant part of Ickenham Manor is the rear wing of two bays representing part of an open hall and a two-storeyed bay, which dates from the middle or later part of the 14th century. The presence of an open hall is shown by the heavily sooted rafters of the western bay: in an open hall house the principal living room, the hall, had a hearth in the middle of the floor, and as a result the room was left open to the roof to permit the escape of smoke and fumes.
In the second phase of construction the cross wing, of two storeys throughout, was added at the east, producing a modified 'T' plan and it survives in its entirety. It is jettied at the north, has four bays, and a roof of clasped purlin and tie beam form. Externally the walls had close studding, still visible in the upper wall at the north and in parts of the east. The original layout of the upper floor is hard to disentangle from later changes. The hollow moulded inner edge of a blocked doorway to a second storey porch (now gone) can be seen in the upper room. Internal timbers upstairs are decorated with chamfers and step stops to the tie beams and posts.
Although there are now only two rooms on the ground floor, partitioned at the central frame, the opposed doors at the northern end of the side walls in the southern room, and the numerous doors in the partition wall, mark a former screens or cross passage, now incorporated within the southern room. One original window survives by the door in the eastern wall; its two lights are divided by a moulded mullion, rebated for glass, and they have four-centred heads with sunk spandrels beneath a square head. In the north wall of the cross passage four doorways are visible; all but the second from the east are blocked. The door at the west is a later insertion, but the other three are original. The four-centred heads and mouldings are of an early to middle 16th century character. The sitting-room has 18th century panelling and alcoves.
Adapted from Ickenham Manor Farm by Patricia Clarke, in Transactions of the London and Middlesex Archaeological Society (Volume 42, 1991)