| RHP9629/27 | Plan of Irwine and Caldkine, [Langholm] | [1718] |
| RHP9629/27a | Plan of Midleholme; Murthholme, [Langholm] | [1718] |
| RHP9629/28 | Plan of Stubholme; Earshaw and Hole, [Langholm] | [1718] |
| RHP9629/28a | Plan of Blockburnefoot; Broadbloch, [Langholm] | [1718] |
| RHP9629/29 | Plan of Bigholmes, [Langholm] | [1718] |
| RHP9629/29a | Plan of Westwater (with description of Glentenmont), [Langholm] | [1718] |
| RHP9629/30 | Plan of Glentenmont, [Langholm] | [1718] |
| RHP9629/30a | Plan of Scooreknow, [Langholm] | [1718] |
| RHP9629/31 | Plan of Clughfeets St Brids Hill and Grains, [Langholm] | [1718] |
| RHP9629/31a | Plan of Caffield & Corsmungo, [Langholm] | [1718] |
| RHP9629/32 | Plan of Nise Hill, Becks & New Lands, [Langholm] | [1718] |
| RHP9629/32a | Plan of Meikleholme Walls and Gallowside, [Langholm] | [1718] |
| RHP9629/33 | Plan of Langholme Castle, Holmehead Steenholme and Baggray, [Langholm] | [1718] |
| RHP9629/33a | Plan of Milneholm Tompend Tailend and Breckenwrae, [Langholm] | [1718] |
| RHP9629/34 | Plan of Staplegorden & Bankhouse, [Langholm] | [1718] |
| RHP9629/34a | Plan of Whitsheills & Arkins, [Langholm] | [1718] |
| RHP9686/1-6 | Architectural plans (5) of Langholm Lodge | 1876 |
| RHP9714/42-44 | 42-43. Architectural plans and elevations of gamekeeper's house in Langholm
44. Specification therefor. | 1837 |
| RHP9717/47 | Elevation of alternative seat ends for Langholm Church | [mid 19th century] |
| RHP13384 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV), marked to show fixed and suggested burgh boundaries of Langholm: 1893. | 1893 |
| RHP15079 | Plan of proposed line of the Caledonian Railway from Glencartholm to Langholm | 1845 |
| RHP15080 | Plan of proposed line of the Caledonian Railway from Todhillwood to Langholm | 1845 |
| RHP17789 | Tracing plan of the North British Railway from Langholm to [Tarrasfoot] Tile Works. | 1896 |
| RHP17790 | Plan of the North British Railway from Langholm to beyond Longwood. | Late 19th Century |
| RHP20187 | Plan and section of proposed arrangement for wool drying in mill in Langholm | 1890 |
| RHP20268 | Plan of hoist for grain warehouse in Langholm | 1882 |
| RHP20269 | Plan and section of hoist headstock for Messrs. Reid & Taylor in Langholm | Late 19th century |
| RHP20435 | Plan and section of hoist for grain warehouse in Langholm | 1882 |
| RHP20440 | Plan and section of hoist headstock for Messrs. Reid & Taylor in Langholm | Late 19th century |
| RHP23500/3 | Photographic print of plan of lands in parish of Langholm. | 1810 |
| RHP25174 | Sections, elevations and details (3 copies) of bridge No 19 near Langholm to be strengthened by British Railways. | 1950 |
| RHP25192 | Plans, elevations and details (3 copies) of bridge No 20 near Langholm to be strengthened by British Railways. | 1950 |
| RHP27753 | Diagram plan of the North British Railway from Carlisle to Silloth, from Drumburgh Junction to Port Carlisle, Longtown to Gretna and from Riddings to Langholm showing those sections relaid with old and new 75lb steel rails. | 1879-1891 |
| RHP27795-27796 | Plan of ground near Langholm proposed to be acquired from George Maxwell by the [North British Railway]. | 1862 |
| RHP27797 | Plan of ground near Langholm acquired from George Maxwell by the [North British Railway], copied in 1896 | 1870/1896 |
| RHP27798 | Plan of ground near Langholm to be conveyed to George Maxwell by the [North British Railway], copied in 1896 | 1871/1896 |
| RHP27799 | Plan of ground near Langholm to be conveyed to George Maxwell by the [North British Railway]. | 1897 |
| RHP27821 | Architectural plan of station buildings at Langholm (North British Railway) | 1892 |
| RHP27822 | Architectural drawing of Langholm Station | 1894 |
| RHP27823 | Plan of Langholm Station | 1894 |
| RHP27824 | Architectural drawing of station buildings at Langholm | 1894 |
| RHP27825 | Plan of Langholm Station | 1894 |
| RHP27826 | Architectural drawing of Langholm Station | 1894 |
| RHP27827 | Architectural section and elevation (2 copies) of proposed additions to station buildings at Langholm (North British Railway) | 1894 |
| RHP27828 | Architectural plan of proposed additions to station buildings at Langholm (North British Railway) | 1894 |
| RHP28129 | Plan, section and elevation of bridge over public road on the Langholm branch of the North British Railway | 1859 |
| RHP33386 | Plan of sites of colliery company property in Langholm: 1947 or post | 1947 |
| RHP37166/1-2 | Plans (2 sheets) of the ground proposed to be taken off the property of the Duke of Buccleuch for the Langholm branch of the Border Union Railway. | 1862 |
| RHP38764 | Track diagram of Langholm. | c 1940 |
| RHP38800 | Track diagram of Langholm, showing mills and gas works. | c 1945 |
| RHP39079 | Ordnance Survey 1/2500 plan (Dumfriesshire, sheet LIII.4) marked to show water supply to railway company's cottages at Glen Tarras (London And North-Eastern Railway), updated to 1934 | 1932/1934 |
| RHP39589 | Diagram plan of signalling alterations between Ridings Junction and Langholm for proposed one engine in steam working (British Railways). | 1959 |
| RHP43341 | Ordnance Survey 1/2500 plan marked to show proposed boundaries of burgh of Langholm. | 1866 |
| RHP77861 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLIV.NE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77862 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.SE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77863 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.NE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77864 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.SW) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77865 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.NW) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77903 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XXXVI.SW) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77904 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XXXVI.SE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77932 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLIV.SE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77968 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LII.NE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77969 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LII.NW) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77971 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LIII.NE) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP93487 | Tracing plan of garden at Langholm Lodge, showing proposed alterations | [Late 19th century] |
| RHP93508 | Scheme of the debatable lands between the water of Esk and Hall Burn in Wauchopdale, Dumfriesshire | 1623 |
| RHP93684 | Architectural plan of ground floor of chapel at Langholm Lodge | [c 1883] |
| RHP93712 | Architectural plan of ground floor of Irvine House | 31 May 1836 |
| RHP93720 | Architectural plan of alterations to ground floor of Irvine House | 31 May 1836 |
| RHP93766-93767 | Architectural plan and section of private chapel at Langholm Lodge | [c 1883] |
| RHP93773-93774 | Architectural plan of floors of [Milnholm, proposed to be built for Mr Harley Maxwell] | [c 1834] |
| RHP93803 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV) marked to show location of springs from additional water supply to Langholm, with note of rates of water flow from each spring | 24 Aug 1877 |
| RHP93805 | Plan of ground at Buccleuch Square, Langholm, leased to the Ministry of Mines | [Early 20th century] |
| RHP93840 | Duplicate Ordnance Survey 6 inch plans (3, Dumfriesshire, sheet XLV) marked to show existing and proposed burgh boundaries at Langholm, following a petition to sheriff court of Duke of Buccleuch and another | [c 1895] |
| RHP95651 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLIV.SE) coloured to show classification of land | [1944-1955] |
| RHP95652 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.NW) coloured to show classification of land | [1944-1955] |
| RHP95653 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.NE) coloured to show classification of land | [1944-1955] |
| RHP95654 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.SW) coloured to show classification of land | [1944-1955] |
| RHP95655 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet XLV.SE) coloured to show classification of land | [1944-1955] |
| RHP95673 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LII.NE) coloured to show classification of land | [1944-1955] |
| RHP95676 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LIII.NW) coloured to show classification of land | [1944-1955] |
| RHP95677 | Ordnance Survey 6 inch plan (Dumfriesshire, sheet LIII.NE) coloured to show classification of land | [1944-1955] |
| RHP118451 | Plan for permanent way renewal at Langholm (British Railways): 1961 | 1961 |
| RHP135875 | Hand tinctured plan of Langholm Station and environs (London & North Eastern Railway Company) | 13 June 1928 |
| RHP141297 | Plan of New Langholm | 1879 |
| RHP142621 | Plans of Langholm burgh boundaries, Dumfriesshire | 1894-1947 |
| RHP142621/1 | Ordnance Survey 1/2500 plan (Dumfriesshire sheet XL.V.II) | 2 Apr 1894 |
| RHP142621/2 | Plan of Langholm burgh boundaries | 29 Aug 1946 |
| RHP142621/3 | Ordnance Survey 6 inch plan (Dumfriesshire sheet XLV.NE) | 20 Feb 1947 |
| RHP143000/1/11 | Ordnance Survey 1 inch map (Sheet 11, Langholm) | 1863 |