Two surveys of the estate were undertaken in 2004. A major topographic survey was carried out on the lower lying fields by English Heritage on behalf of Greenmark.

Archenfield Archaeology carried out a brief walkover survey of the higher fields which utilised information supplied by Herefordshire Archaeology.

These were in addition to the basic survey of the farm buildings also carried out by Archenfield Archaeology.

Two geophysical  surveys  have  been  carried  out  by Archaeophysica to  examine  the  survival of  buried archaeological  features  in  the  fields  around  the  farm buildings  and  along  the   side  of  the  Trench  Royal.

Prehistoric activity has been demonstrated in the area around Turnastone Court with find spots recorded from the Neolithic to Bronze Age. Monuments in the area of a similar date include Cothill Tump/Camp west of Cothill Farm and a slightly later hill fort with ramparts, in Lower Park Wood, near Poston Court.

The fields around the site have yielded flints. Flakes, chips and Flakes, chips and scrapers have been found along the west edge and west central sides of the field to the west of the study area and a working floor of flint flakes and chips have been recorded at Dolward.

To the west of Turnastone Court, at Shearger Farm, three flint knapping sites (Herefordshire Sites and Monument Record numbers 8475,  8476,  8477)  have been located in fields around the farm. Further flint find spots are located close to a mound which may be a barrow or a motte, close to the River Dore south-west of Turnastone Court.

A flint knife and scraper from the late Neolithic/Bronze Age and a middle Bronze Age palstave has been recorded in Vowchurch, but within a 2km radius of Turnastone Court, and a Late Bronze Age socketed axe  has been found close to Turnastone Court.

Cothill Tump is a mound about 30 metres in diameter surrounded by a dry ditch. This site is fairly enigmatic and may be a motte or a Bronze Age barrow. It may even be a barrow re-used as a fortified site in the high medieval period.

A ploughed out castle site variously described as a motte or ringwork is located next to the church. This is in the centre of the field approx 40m north-west of the church and is surrounded by a rectangular crop mark. The SMR records a mound east of the castle and stonework in the river bank east of the castle.

Chanstone Tump is a motte with two possible baileys (classified B) on the banks of the river Dore south-west of Turnastone Court. The motte is approx 4m high and probably had wet defenses. There are traces of buried foundations in the motte, probably of a shell keep, and stone buried stone in the motte ditch and remaining bailey area. There are faint signs of the bailey ditch and a mill leet. Across the river is a low mound that is possibly another castle.

It is thought to be a castle built on a manor called Edwardstune that Walter held from Roger de Lacy in 1086 (DB f184).  Later the manor was known as Walterstone cum Byford, having been renamed (possibly from the Walter of the Domesday Book). Roger Ragun had Walterstone in 1224 and in 1243 John Ragun, son of Hugh, had 1/6 fee in Chanstone of the Honor of Weobley (fee 811). In 1303 John Ragun shared ½ fee at Chanstone and Walterstone with Richard le Brut.

A possible motte is sited at Poston just north of Turnastone in Lower Park Wood with buried and partly exposed D-shaped foundations built inside a ringwork bank with the bailey mostly ploughed out (ibid pg 20).

Medieval ridge and furrow survives in the landscape north of Cothill Farm and to the north and north-east of Ladywell Cottage in land now owned by Turnastone Court. There are also remains of ridge and furrow in Chanstone wood to the south.

Land around the church has earthworks relating to medieval settlement. Vague earthworks survive to east, north-east and south-west of St Mary’s church. The church itself has windows dating to 1280-1300 but it is probable that the church was largely or entirely rebuilt at this period. The roof of the south porch is 14^th /15^th century, and the roof of the church, 16^th century.

Medieval settlement around Poston is mentioned in the Herefordshire Domesday. Ralph holds from him (the King) in the Golden Valley. Edwin held it, 2 hides and in Lordship, 1 plough, 2 villagers and 1 plough. It was waste (value) now 5s (Domesday 1, 30).

Post medieval Limekilns are to the south-west of Turnastone Court near Slough Breast and Little woods. Limestone outcrops in fields to the west of the Court house plants that favor basic lime conditions. A possible platform in one of the upper fields (58 on the tithe) north of Ladywell Cottage may be the remains of an old kiln. The field names around the platform are ‘Kiln Piece’ and ‘Seven Acres under the Kiln’ (field numbers 58 and 59).

The walkover survey (Archenfield Archaeology) has identified features associated with the irrigation of the landscape. Features have been found that potentially take lime rich water from the higher grounds down to the meadows. Further water features outside of the walkover, but still on land belonging to Turnastone, are to the south-west of the Court. Upper and Lower weir appear to have been constructed to divert the Slough Brook past Chanstone farm and into the Trench Royal. Stone walls closer to weir are of a building, but its situation, without any fall of water, rule it out as ever being a mill. The lower weir is rebuilt in concrete and possibly served to control a vanished overspill.