George Bowes' first venture into architecture on his estate was to build a bath house. It was a simple classical one-storey building consisting of three rooms with a portico. The small room behind the portico was used as a dressing room. All three rooms had fireplaces. The rooms flanking the portico had sash windows with stone surrounds. The bath house was approximately 47 foot x 15 feet 6 inches. A clearing marks the site of the bath house today. A distant cousin of John Bowes, George Bowes great-grandson, Martha Helen Davidson, sketched the bath house in 1827. Her drawing showed that the bath house stood above a 60 foot cliff, partly retained by stone blocks, with a balustrade to protect the path in front of the bath house. The bath house had been first mentioned in the records in September 1733. By November of that year Joseph Pallister, a carpenter and one of the skilled estate workers, was paid for roofing the bath, and the following May may sashes for it. In 1734 Pallister paid for a piece of leather for the plug at the bath. By November Jon Bickerdike was 'wainscotting and flooring' several rooms of the bath house. Two months later Samuel Clark was putting up a marble chimney was fixing iron rails round the bath. Francesco Vassalli, a Swiss stucco worker, was commissioned to do the plasterwork. The architect of the bath house is not known. Sadly it was destroyed by a landslip in the 19th century.

The walled garden was moved from a position near Gibside House to a site some 500 yards to the south-west of it. It became customary to have the kitchen garden some distance from the house due to the smells of night soil and manure. Work began in 1734. A basin was made in one corner, there were hot beds and espaliards round the walls. Work was complete in 1736}. Garden wall. Third quarter of C18. Brick with sandstone ashlar dressings.
High wall with flat stone coping surrounds garden. Double-keystoned
lintel and stone jambs to boarded door in south elevation. (Altered). A programme of archaeological monitoring and recording by NCAS in 2013 was undertaken at the Walled Garden. A variety of features were recorded, principally planting plate for the 18th century and later orchard. In the northern part of the garden the planting plates were, with one exception, c.2m square and formed of re-used square or rectangular sandstone flags of various sizes lying at a depth of between 0.67-0.55m bgl. To the south there were variations to this regular pattern. In this area, stone-flagged planting plates were edged with hand-made red brick. The planting plates were arranged in two rows, one on either side of the central garden path, and correspond closely to tree positions swhon on the 1857 OS plan. Circular red brick planting plates were located in the southern part of the garden representing a secondary phase of planting.

Evidential Value- Built fabric of walls, some archaeological potential
Historical Value- The illustrative historic significances of the walled garden mainly relate to the history of the Bowes family and the gradual evolution of Gibside. The garden also sits in the context of other similar walled gardens, and is a relatively early, though unsophisticated and not exceptionally well-preserved, example of its type.
Aesthetic Value - The zoning of the walled garden area, including its designation within a Registered Park and Garden, highlights its high potential for Aesthetic value. See Heritage Impact Assessment for more detail.

In 1772 Mary Eleanor Bowes started building a greenhouse called the Orangery with an ornamental pond outside. First referred to in the cash accounts as "The New Green House". The tall windows of the south east façade looked on to a paddock where an ornamental pond 50 feet across was made. The rear of the building had smaller windows because of its exposed position. It measured 60 feetby 40 feet9 inches. It was faced in ashlar. Hand made brick was used in the interior, with a lath and plaster finish. The building has been attributed to James Paine on stylistic grounds, but with no documentary evidence. The windows were large and elaborate. The arcade which fronted the building consisted of seven bays of Tuscan columns. There was no glass in the roof, but a shallow hipped roof of slate was masked by a balustrade decorated with urns. The small entrance lobbies prevented draughts reaching delicate plants. One entrance lobby was oval and had a fireplace and four decorative wall niches. The other lobby was rectangular with rounded corners and contained the heating system for the building. Part of the floor was excavated to hold a boiler and furnace. A central vaulted area was a coal store. The building is now ruinous. LISTED GRADE 2*. A ghostly figure has been seen gliding across the grounds towards the orangery, thought to be the spirit of Mary Eleanor Bowes. She had wished to be laid to rest at Gibside mausoleum, but was buried at Westminster Abbey in 1800.

18th century culvert associated with a gently ramped earthwork marking the vista from the Statue of Liberty column..

This meadow was the location of a C16 iron working site. In 1545 Richard Hodgson of Byermoor had a furnace built in the freehold dividing West and East Gibside. Roger Blakiston provided rammel (loppings from the woods). A deed of the 1520s refers to '500 oakes sould by Roger Merlay' at the time of the inception of the furnace. Hodgson's ironmill and furnace at Gibside had rights to the ore from the entire Blakistion domain. By 1553 Roger Blakiston and Richard Hodgson were able to buy out two partners, one of them being Roger's father, William. They owned between them a 'full thrid pte of all the said yrne mynes and yrne mylne'. As well as providing the ore and charcoal for founding, the Blakistons provided coal for forging. They co-opted a metallurgist to exploit their resources on the spot. By 1550 they had an integrated industry. The forge of the 1550s may have been abandoned by the end of the 16th century. In 1608 William Blakiston gave leave to Edward Talbot to build a forge and furnace in the Mylne Field and to make watercourses 'to and fro the said forges and furnisses'. The water supply may have come from the Leapmill Burn. The forge is shown on a plan of 1633 700 yards NE of the burn's junction with the Derwent. Edward Talbot was the brother of the ironmaster 7th Earl of Shrewsbury. In the 1630s the number of smiths doubled at Gibside, indicating an expanson of ironmaking. By the 1680s numbers of smiths had tripled. Swedish imports were used to supplement and improve local stock. This was the period of Baltic 'Eastland' trade. Despite this growth, iron remained the least dynamic Tyne industry - most energy went into ships and coal. The Blakistons eventually abandoned iron for coal.George Bowes established river walls or 'keys' to reduce flooding. A drive crossed the haugh through gates at each end, probably constructed around 1790 to 1820. As the western entrance became more important in the 19th century as a route to the railway, a lodge was built at the entrance to the haugh and ramping provided to reduce the slope.

Estates in the 18th century tried to be as self-sufficient as possible, and for this reason a brick kiln was built in the centre of the Gibside estate in the area now known as the Brick Kiln Field. In this field are the remains of the pond where the clay was extracted. The Brick Kiln Field is shown on Fryer's map of 1803. Shown on the 1767 Estate Map as Longlands. The hollow area on the northern side of the field is the old brick pit and a long mound and spread of brick debris on the eastern side of the pit suggest the location of the kiln. There are many references to the operation of the brick kiln in the 18th century accounts.

Victorian Drill Hall which replaced Clifford's Fort (HER 149-150).

A temporary station built in 1865 to replace the former terminus of the Blyth and Tyne Railway (HER 5117). This in turn was superseded by another station to the east (HER 2046).

The Blyth and Tyne was extending its system, and in 1860-1 opened a branch from Hartley to a terminus of its own on the north side of the main Tynemouth Road, some 500 metres to the west of the earlier site (HER 1200 the Oxford Street Terminus of the Newcastle and Berwick Railway). This site was suceeded in 1864 by a temporary site a little way to the north-east of its predecessor (HER 5118).

Recommended as a site with potential 16th century/17th century coal workings, however no surface features were identified in this area during the field visit. No evidence of surface features, but potentially important underground Medieval mining galleries. Although no surface remains were identified this does not preclude the existence of important medieval underground workings