The Parish records show that Mornacott dates back to 1286 and reference is made to Mornacott in the Doomsday Book although most of the current buildings are of 17th Century origin. Earlier occupation of Mornacott is however evidenced by the remains of a hill settlement atop one the many valleys which has been dated back to the 5th Century BC by English Heritage.
The main dwelling at Mornacott is a classic 17th Century Devon Longhouse built of cob and stone with later additions which included the incorporation of an old cider press into the main dwelling.
Of particular note to the west of the main house is an 18th Century bank barn, once used for the threshing of corn, and retaining one of the finest remaining examples of a traction roundhouse.
The early occupation of Mornacott is clouded by the mists of time but for many years Mornacott was in the ownership of the Passmore family who were one of the largest farming families in North Devon tracing their farming roots back to 1572.
Their occupation of Mornacott was interrupted briefly in 1710 through the granting of a 99 year lease to James Courtney in exchange for four broad pieces of gold marked with globe and sceptre and £390. But In 1825 William and Betsy Passmore took over Mornacott from John Passmore and brought up their family there, doing their duty as parishioners by taking on pauper boys who were apprenticed by the North Molton overseers of the poor. Indeed in the 1841 Census William Passmore was recorded as having two such apprentices living with their master's family (together with two labourers and two female servants).
At the time of the tithe apportionment in 1840 Mornacott comprised only 200 acres and a large piece of the land was given over to a limestone quarry for which the original of a 21 year lease of 1780 survives, giving the Lessee, George Spencer, the right to mine rock and to erect lime kilns.
By 1861 William Henry Passmore had become head of the Passmore household remaining at Mornacott until his early death in 1866 when it passed to his younger brother Edmund who raised eleven children at Mornacott until his sale of Mornacott in 1891.
Thereafter Mornacott was farmed for many years, at one stage in the early 20th Century being briefly incorporated into the lands of nearby Whitechapel Manor until the Manor and the lands were split and sold separately with the Manor later becoming a hotel of some considerable repute.