Brick and slate hall. Arched windows glazed. West gable corrugated metal sheeting (original) for installation of large pieces of equipment. South side complicated by later additions for further capacity in 1920s. Interior unseen.

Brick and slate sub station, windows glazed (possibly opened later). Now used as warehouse.

Brick and slate with bricked-up arched windows. Original sliding doors replaced. Interior - contains elevated area for switch board etc. Most tiling in place and wrought iron and wooden bannister rails survive. Was what was termed a 'running' sub station by Northern Electric - I.e. contained moving conversion gear as well as stationary transformers.

Entrance lodge for Armstrong Mitchell Shipyard (HER 5023) and electricity substation on White Street (then Victoria Street). Decorated brick lodge entrance to shipyard offices via stairs down to passage under rail siding. 1907 altered from entrance hall and bicycle store to pay office and waiting rooms and the 1901 substation enlarged adjacent. These 1907 functions explain present appearance with fluted brick frieze complete and the louvre 'shed' for increased ventilation for larger transformers. 1916 lodge altered to accommodate women workers' dining hall and lavatories. Substation remained.

A rectangular complex of buildings (eight probable houses) and a similar number of associated gardens. Date established not known but the buildings are recorded on an 1812 Lambton Estate map and marked as "Elba" on the 1856 Ordnance Survey 25 inch to 1 mile map. The individual units are all well defined on the 1896 Ordnance Survey map, and on this basis the complex is not considered to be a farmstead. The buildings remained extant until 1920 but three sides of the complex had been demolished by 1940.

Site of former stables and associated buildings located to south-east of Colliery Row. Probably constructed for stabling horses used on colliery wagonways in the area. The buildings are recorded on the 1838 Houghton-le-Spring tithe map and labelled as "North Hetton Stables" on the 1856 Ordnance Survey map. By 1896 the complex of buildings had expanded and are recorded as "North Hetton Farm". The original stable block no longer survives but the later farmhouse is still extant.

Former farmstead located on north side of the road between High Dubmire and Houghton-le-Spring. Date established not known but recorded on the 1838 Houghton-le-Spring tithe map. The building is recorded as Moors Farm by the Ordnance Survey from 1856 and the complex of buildings gradually increased from that date. Some of the outbuildings have been demolished since 1939 and both the farmhouse and adjoining range to the west are now in residential use.

Building and ancilliary structure to north of Coaly Lane. Date established not known but recorded on the 1838 Newbottle tithe map and marked as "Segg Letch". In 1856 the buildings are marked as "Low Dubmires" and from 1896 as "Sedgeletch Farm". Most of the buildings survive intact but have been altered and modernised.

Excavations at Arbeia Roman Fort in 1992-4 and 1999 revealed a multi-period prehistoric site preserved beneath the Roman fort. Flints attested mesolithic activity. In the early Neolithic a segmented ditch may represent part of a causewayed enclosure. By circa 3000 BC this had been superseded by pits and shelters associated with flint knapping. Finds also suggest a Bronze Age presence. The Iron Age was represented by a roundhouse (see HER 4357). Prehistoric artefacts have been recovered from the fort on previous occasions, including mesolithic and neolithic flints, a polished stone axe, a BA shale button and jet bead and a piece of Neolithic or Bronze Age rock art decorated with cups. During this excavation, 327 pieces of struck stone were recovered, mostly flint, but a few examples of chert and quartz. The tools included bashed lumps, cores, flakes, blades, scrapers, microliths, a burin and leaf-shaped arrowhead.

It was probably the second Mrs. Bowes wish that the ice house was built. In July 1747 William Cranston was sent from Ravensworth Castle with some ice. Some months later a letter arrived from Mr. Jones, gardener at Ravensworth Castle, requesting two pails of ice for his master. This may have hastened the building of the ice house. In 1748 Thomas Hope was paid for building up the arch at the ice house and John Maughan for sawing joists. In November of that year Thomas Hopes was building the ice house porch. The building was thatched. The bottom part was of an inverted beehive construction made of brick, 18 feet deep and 25 feet across. The top of the structure was a brick groin vault of concentric rings with cross arches on either side of the entrance. Bowes never again had to ask Ravensworth Castle for ice or fresh fruit. A stone entrance gives access to the hemispherical chamber of this late 18th century icehouse. LISTED GRADE 2