| RHP1457 | Plan of the estate of Brahan, with Tollie and Kildun, property of the Earl of Seaforth | 1765 |
| RHP1458 | Plan of the estate of Brahan | [c 1770] |
| RHP1460 | Architectural plans and elevations of alterations on farm steadings at Brahan Mains, Urray, Ross and Cromarty | 1899 |
| RHP1460/1 | Architectural elevations of alterations on farm steadings at Brahan Mains, Urray, Ross and Cromarty | 1899 |
| RHP1460/2 | Architectural plan of alterations on farm steadings at Brahan Mains, Urray, Ross and Cromarty | 1899 |
| RHP1460/3 | Architectural plan of alterations on farm steadings at Brahan Mains, Urray, Ross and Cromarty | 1899 |
| RHP1460/4 | Architectural plans and elevations of henkeeper's house and henhouse at Brahan Mains, Urray, Ross and Cromarty | 1899 |
| RHP1460/5 | Architectural plans and elevations of proposed bothy at Brahan Mains, Urray, Ross and Cromarty | 1901 |
| RHP2636 | Part of chart of Beaully Basin, marked to show part of foreshore at Tarradale to be reclaimed by the Hon. H.J. Baillie, Ross and Cromarty | [Late 19th century] |
| RHP6342/1-3 | Plan of the River Beauly | 1888 |
| RHP6348/1-4 | Ordnance Survey 1/2500 plan (Ross-shire. Sheet XCIX.II) | [post 1872] |
| RHP6349 | Plan of the River Beauly | 1888 |
| RHP6406 | Ordnance Survey 1/2500 plan (Ross-shire Sheets XCIX. 11, 12.) | [c 1890] |
| RHP6411 | Ordnance Survey 6 inch plan (Ross & Nairn (Detd No 5) Sheet XCIX. Parts of Inver Sheets II. III) | [c 1890] |
| RHP6586 | Plan of estate of Lovat, north of the River Beauly between Aigas and Ardnagrask | [1757] |
| RHP9626 | Plan of the Estate or District of Strathconan | 1824-1825 |
| RHP10547 | Ordnance Survey 6 inch plan Brahan estate | 1901 |
| RHP10768 | Architectural plan of inn, house and shop at Moy Ferry | 1834 |
| RHP11637 | Plan of the Lochcarron Road continued from Achnasheen to the village of Contin. | 1806 |
| RHP15454 | Architectural plan and elevation of station waiting rooms at Muir of Ord (Highland Railway): 1893 | 1893 |
| RHP17713 | Plans (2) of the Inverness and Ross-shire Railway from [Muir of Ord] to beyond Croyard. | 1862 |
| RHP23869 | Plan of road to Ord Distillery showing the locus of an accident. | 1921 |
| RHP23894 | 1. Ordnance Survey 1/2500 plan marked with pencil grid pattern at Marybank. 2. Ordnance Survey 1/2500 plan marked with pencil grid pattern at Wester Moy. | 1906 |
| RHP23987 | Plan of farm of Dreim, part of Highfield, Ross and Cromarty | 1832 |
| RHP23988 | Plan of farms of Wester Urray and Tormuick , Ross and Cromarty | 1861-1862 |
| RHP23989 | Plan of lands of Chapelton, Ross and Cromarty | 1881 |
| RHP23990 | Plan of Rheindown Heindown (Reindown), Ross and Cromarty | 1799 |
| RHP23991 | Plan of Rheindown, part of the Chisholm estate, from a survey in 1846 | 1846 |
| RHP23992 | Plan of Rheindown, Ross and Cromarty | 1847 |
| RHP38311/5 | L.M.S. Railway, Northern Section: Gradient profiles, stations etc | 1937 |
| RHP41635 | Plan of feu [from Redcastle Estate] at Darroch House, Muir of Ord | October 1948 |
| RHP43265 | Plan of proposed bridge at Cononbridge and bridge over the Orrin at Aultgowrie, Ross and Cromarty | 1801 |
| RHP44812 | Plan of disputed ground in West Monar, adjacent to Allt Na Creige-Salachaidh (Rivulet of Coragnasallach). | 1807 |
| RHP45176 | Plan of lands of Bridgepark, the property of Keith W Stewart Mackenzie. | 1849 |
| RHP78995 | Ordnance Survey 6 inch plan (Inverness-shire, sheet II; Ross and Cromarty, parts of sheets XCVIII & XCIX) marked to show farm boundaries | [1944-1955] |
| RHP79302 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXXVIII) marked to show farm boundaries | [1944-1955] |
| RHP79309 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XCVI) marked to show farm boundaries | [1944-1955] |
| RHP79310 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XCVII) marked to show farm boundaries | [1944-1955] |
| RHP79311 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XCVIII) marked to show farm boundaries | [1944-1955] |
| RHP79312 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XCIX) marked to show farm boundaries | [1944-1955] |
| RHP79318 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CV) marked to show farm boundaries | [1944-1955] |
| RHP79319 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CVI) marked to show farm boundaries | [1944-1955] |
| RHP79320 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CVII) marked to show farm boundaries | [1944-1955] |
| RHP79321 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CVIII) marked to show farm boundaries | [1944-1955] |
| RHP79326 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CXII) marked to show farm boundaries | [1944-1955] |
| RHP79327 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CXIII) marked to show farm boundaries | [1944-1955] |
| RHP79328 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet CXIV) marked to show farm boundary | [1944-1955] |
| RHP82275-82279 | Plans, sections, elevations and details of Arcan Drainage conduits | Dec 1867 |
| RHP82284 | Plans of Urray Water Scheme | Jun 1886 |
| RHP83933 | Plan of estate or district of Strathconon, Ross and Cromarty | 1825 |
| RHP86086 | Copy plan of part of annexed estate of Lovat lying in parish of Kilmorack, with table of contents, produced in causa Lord Lovat v. George Webster of Flemington and others | [c 1872] |
| RHP131589 | Weight diagram showing elevation, plan and sections of bridge carrying Public Road, Muir of Ord over Fortrose Branch Railway between Muir of Ord and Redcastle Stations (London, Midland and Scottish Railways) | c 1933 |
| RHP131625 | Weight diagram showing elevation, plan and sections of bridge carrying Corry Road, South of Muir of Ord Station over railway at 12 miles 21 chains between eauly and Muir of Ord Stations (London, Midland and Scottish Railway) | c 1933 |
| RHP131626 | Weight diagram showing elevation, plan and sections of bridge carrying public road (A9) over railway at Muir of Ord Station (London, Midland and Scottish Railway) | c 1933 |
| RHP140312 | Plan of Highfield estate, Urray, Ross and Cromarty | 1848 |
| RHP140875 | Plan of Strathconon estate | c 1825 |
| RHP142355 | Plan of Urray churchyard extension, Ross and Cromarty | May 1964 |
| RHP142800 | Plan of Brahan estate, Ross and Cromarty | Nov 1784 |
| RHP142801 | Plan of Brahan estate, Ross and Cromarty | 12 Dec 1901 |
| RHP142804 | Plan of Mains of Brahan farm, Brahan estate, Ross and Cromarty | 1787 |
| RHP142806 | Plan of Mains farm, Brahan estate, Ross and Cromarty | 24 Jun 1869 |
| RHP142809 | Ordnance Survey 1/2500 plans (Cromartyshire and Nairnshire) | c1892 |
| RHP143398 | Plan of area between Lochan Fada and Gleann Goibhre, Inverness-shire | c 1780 |
| RHP143400/8/1 | Ordnance Survey 1/10000 plan, Inverness-shire; Ross and Cromarty, Sheet NH 44 NE | 1970s |
| RHP143400/8/2 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 45 NE | 1960s-1970s |
| RHP143400/8/3 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 45 SE | 1960s-1970s |
| RHP143400/8/4 | Ordnance Survey 6 inch plan, Inverness-shire; Ross and Cromarty, Sheet NH 54 NW | 1960s-1970s |
| RHP143400/8/5 | Ordnance Survey 6 inch plan, Inverness-shire; Ross and Cromarty, Sheet NH 54 NE | 1960s-1970s |
| RHP143400/8/7 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 55 NW | 1960s-1970s |
| RHP143400/8/10 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 55 SW | 1960s-1970s |