| RHP803 | Plan of land at Pollo, Rhives, Garty, Pitmaduthy, Balnagore, and Loandhu taken for the Inverness and Aberdeen Junction Railway (Ross-shire extension), on the property of Sir Charles Wm. A. Ross: 1864 | 1864 |
| RHP11685 | Plan of proposed improvement on the Invergordon Road at Milton (Milltown). | 1832 |
| RHP13299 | Plans of the estate of Balnagown. | 1808 |
| RHP13299/1 | Plan of farm of Mains of Balnagown | 1808 |
| RHP13299/2 | Plan of farms of Rhives, Parkhill, Baddie-Bae and Portenleich, Ross and Cromarty | 1808 |
| RHP13299/3 | Plan of farms of Auchoyle and Knockgarty etc | 1808 |
| RHP13299/4 | Plan of farm of Logie and new plantation | 1808 |
| RHP13299/34 | Plan of Clash, Badda Resh and Casandamff | 1808 |
| RHP13299/A | Planbook for the estate of Balnagown: Title page | 1808 |
| RHP13299/B | Planbook for the estate of Balnagown: Index | 1808 |
| RHP13299/C | Planbook for the estate of Balnagown: Title page for Parish of Kilmuir | 1808 |
| RHP22226 | 1. Ordnance Survey 1/2500 plan (Ross-shire, sheets LIV.2,6) marked to show Scotstoun Estate
2. Book of reference to plan of part of Parish of Logie Easter | [1874] |
| RHP30496 | Part of Ordnance Survey 6 inch plan marked to north of Nigg Bay between Barbaraville and carse lands of Meddat in connection with Meddat flooding case. | 1916 |
| RHP30497 | Ordnance Survey 1/2500 plan (Ross and Cromarty, LIV.12, LV.9) marked to north of Nigg Bay at carse lands of Meddat [in connection with Meddat flooding case]. | 1916 |
| RHP30498 | Ordnance Survey 1/2500 plan (Ross and Cromarty, LIV.7) marked at Balnagown Bay. | 1916 |
| RHP34702 | Architectural plan, elevation and section of billiard room at Tarbat House. | 1897 |
| RHP34707 | Architectural plan, elevation and section of Priesthill Farm Offices. | Late 19th century |
| RHP34708 | Architectural plan and section of Kilmuir church vault. | Late 19th century |
| RHP34712 | Architectural plan and elevation of [Kildary Farm]. | 19th century |
| RHP34713 | Architectural plan, section and elevation of presses for Kildary Office. | 1861 |
| RHP34716 | Architectural plan and elevation of cottage at Kildary. | 1913 |
| RHP34737 | Architectural plan of Polnicol Farm Square. | 1845 |
| RHP34738 | Architectural plan and elevation of a cottage at Polnicol. | 1815 |
| RHP34739 | Architectural plan, section and elevation of Mill Barn, Polnicol. | 1841 |
| RHP34754 | Plan and specification of electrical installation at Tarbat House and Mains. | 1929 |
| RHP34755 | Elevation of bookcase in [Tarbat House]. | 19th Century |
| RHP34756 | Plan of water supply in [Tarbat House]. | 20th century |
| RHP34757 | Plan of gardens at Tarbat House. | 20th century |
| RHP34758 | Architectural elevation of lift at Tarbat house. | 1935 |
| RHP34759 | Plan and section of boiler house showing machinery at Tarbat House. | 1935 |
| RHP34760 | Plan of Tarbat House and gardens | 20th century |
| RHP34761 | Ordnance Survey 6 inch plan marked, including in connection with installing electricity at Tarbat House and Mains. | 1929 |
| RHP34775 | Plan and elevation of arrangement of shafting for saw bench at [Tarbat] saw mill. | 1914 |
| RHP34776 | Plan of Croft Arthur. | 1863 |
| RHP35290 | Architectural drawings of a house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/1 | Principal floor plan for house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/2 | North elevation of house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/3 | South elevation of house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/4 | Ground floor plan of house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/5 | Basement floor plan of house at Balnagown, Ross and Cromarty | 1762 |
| RHP35290/6 | Attic floor plan of house at Balnagown, Ross and Cromarty | 1762 |
| RHP37985 | Copy of a plan of the lands and estate of Invergordon, Delny (Delnie) and Rosskeen with the lands of Priesthill, Ross and Cromarty. | [?19th century] |
| RHP45178 | Plan of Polnicol belonging to Marchioness of Stafford, with table of contents. | 1857 |
| RHP45179 | Plan of lands of Kildary, Appitauld, minister's croft, mill lands and others, the property of Marquis and Marchioness of Stafford, with table and abstract of contents. | 7 May 1860 |
| RHP45182 | Plan of Kildary Farm and Appitauld (Apidauld) and mill lands of Milntown, the property of Duke and Duchess of Sutherland, with table of contents. | 2 May 1865 |
| RHP45193 | Architectural drawing of old Castle of Tarbat | 1777 |
| RHP45194 | Architectural plan of ground floor of Tarbat House, the seat of Lord McLeod | 1784 |
| RHP45195 | Architectural plan of foundations of Tarbat House, showing run of drains | 1784 |
| RHP45196 | Architectural elevations of west and east fronts of Tarbat House with section of colonnade and east wing. | 1784 |
| RHP45197 | Architectural plans of principal floor and bedroom floor of Tarbat House. | 1784 |
| RHP45215 | Architectural plan of ground floor, elevations and sections of stable offices to be erected at Tarbat House for Earl of Cromartie. | 2 March 1893 |
| RHP45216 | Architectural plan of upper floor and elevations of stable offices to be erected at Tarbat House for Earl of Cromartie. | 2 March 1893 |
| RHP45217 | Architectural plan of roof of stable offices to be erected at Tarbat House for Earl of Cromartie. | 2 March 1893 |
| RHP45226 | Architectural plans and section of proposed steading for Kildary Farm, Cromartie Estate. | 1 August 1885 |
| RHP79264 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XL) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79265 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XLI) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79275 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LIII) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79276 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LIV) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79285 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LV) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79286 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79287 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVII) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP81596 | Sections of Delny Station drainage (Highland Railway) | [Early 20th century] |
| RHP82208 | Sketch plan of the present form and state of the Balnagown Garden | 1810 |
| RHP94008 | Plan, elevations and sections of occupation bridge at Polnicol, peg 215 (Inverness and Aberdeen Junction Railway) | [c 1860] |
| RHP97678 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LIV) coloured and marked to show classification of land | [1944-1954] |
| RHP97681 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) marked to show classification of land | [1944-1954] |
| RHP130708 | Details of wrought iron girders for public road bridge at Milntown of New Tarbat near Kildary (Inverness and Aberdeen Junction Railway) | c 1865 |
| RHP131631 | Weight diagram showing elevation, plan and sections of bridge carrying Kilmuir Road south of Kildary over railway at 35 miles 58 chains between Delny and Kildary Stations (London, Midland and Scottish Railway) | c 1933 |
| RHP143400/8/28 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 77 SE | 1960s-1970s |