| RHP159/1 | Chart of the Cromarty Firth from Invergordon to Cromarty, Ross and Cromarty | 12 Feb 1851 |
| RHP4189 | Ordnance Survey 6 inch plan (Ross-shire & Cromarty-shire, LXV) of Alness Bay area: 1880. | 1880 |
| RHP11591 | Plan of intended road from Portinliek alias Culrain to Dingwall, Ross and Cromarty | 1790 |
| RHP11807 | Plan of disputed march between Kinloch and Strath Rusdale. | 1833 |
| RHP11808 | Plan of the march of the lands of Kinloch and Strone and the lands of Ardross. | 1839 |
| RHP13245 | Sketch plan of Invergordon Harbour: 1891. | 1891 |
| RHP15446 | Architectural elevation and section of part of Alness Station [Highland Railway] | [late 19th century] |
| RHP15632 | Architectural plan, elevation and section of house for gatekeeper at level crossing north of Invergordon (Highland Railway): 1885 | 1885 |
| RHP23871 | 1. Ordnance Survey 6 inch plan marked to show proposed area of supply, etc. of Invergordon and District Electricity. 2. Plan of land proposed for generating station in burgh of Invergordan. 3. Book of reference thereto 4. Draft special order | 1924 |
| RHP24959 | Plan of lands of Dalmore (Dallmore) and Obsdale, the property of Duncan Munro of Cullcairn | 1791 |
| RHP30216 | Plan (3 copies) of land to be feued from the Cadboll Estates at Invergordon Station (Highland Railway). | 1916 |
| RHP30217 | Plan showing land feued from the Cadboll Estates at Invergordon Station in 1916-18 (Highland Railway). | 1921 |
| RHP30218 | Plan of site of dockyard officers' residences and workmen's quarters at Invergordon. | 1918 |
| RHP30219 | Plan (2 copies) of Seabank Cottage and lands purchased by Alexander Sutherland, Tain at Invergordon. | 1921 |
| RHP34664 | Plan of farms of Coillymore and Stonyfield, Rosskeen, Ross and Cromarty | 1871 |
| 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] |
| RHP38176 | Photocopy of plan of farm of ORD, as possessed by A Munro, with later markings as to drainage. | 25 November 1875 |
| RHP38177 | Photocopy of Ordnance Survey plan of farm of Easter Ord, with extensive markings as to drainage. | nd |
| RHP41508 | Ordnance Survey. 6 inch plan (Ross and Cromarty, sheet LXVI) marked to show proposed extension of boundaries of Burgh of Invergordon: [1926] | 1926 |
| RHP41509 | Ordnance Survey 1/2500 plan (Ross and Cromarty, sheet LXVI.2) marked to show proposed extension of boundaries of Burgh of Invergordon: [1926] | 1926 |
| RHP41514 | 1. Plan of land at Joss Street, Invergordon proposed to be used for generating station by Invergordon and District Electricity 2. Book of reference 3. Gazette notice 4. Draft special order | 1921 |
| RHP44251 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV) marked to show fishing rights and adjacent lands round Alness. | 1909 |
| RHP46260 | Plan and section of the lower part of River Alness with part of Dalmore adjoining, Ross and Cromarty | 1843-1846 |
| RHP78857 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.NE) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP78858 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.NE) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP78859 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) marked to show farm boundaries | [1944-1955] |
| RHP78862 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79252 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XXV) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79253 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XXVI) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79262 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XXXVIII) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79263 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XXXIX) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79264 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XL) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79274 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LII) marked to show 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] |
| RHP79286 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP81723 | Plan (from Ordnance Survey) showing boundaries at Invergordon Station (British Railways) | 1969 |
| RHP82190 | Architectural plan and elevation of Ardross Cottage showing where fire commenced | 24 Feb 1821 |
| RHP83450 | Plan of farm of Dalmore and Obsdale, Rosskeen, Ross and Cromarty | 1821 |
| RHP84033 | Architectural plans, elevation and section of station buildings and agent's house at Alness [Highland Railway] | [c 1923] |
| RHP94250 | Plan of Invergordon Freight Sundries Depot (British Railways) | [1969] |
| RHP97511 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.NE) marked to show classification of land | [1944-1954] |
| RHP97513 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) marked to show classification of land | [1944-1954] |
| RHP97676 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LII) marked to show classification of land | [1944-1954] |
| RHP97677 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LIII) coloured to show classification of land | [1944-1954] |
| 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] |
| RHP126116 | Tracing showing Admiralty Sidings at Invergordon Coastal Forces Base (London Midland and Scottish Railway) | 1923-1947 |
| RHP131630 | Weight diagram showing elevation, plan and sections of bridge carrying Castle Road, Invergordon over railway at 31 miles 50 chains north of Invergordon Station (London, Midland and Scottish Railway) | c 1933 |
| RHP131819 | Elevation, plan and sections of a bridge carrying Albany Road over the railway at Invergordon Station (London Midland and Scottish Railway) | 1933 |
| RHP140357 | Architectural drawings of proposed hotel etc at 'The Grange', Outram Street, Invergordon | Jun 1977 |
| RHP140357/1 | Block and locality plan (as existing) | Jun 1977 |
| RHP140357/2 | Lower floor plan (as existing) | Jun 1977 |
| RHP140357/3 | Upper floor plan (as existing) | Jun 1977 |
| RHP140357/4 | Elevations (as existing) | Jun 1977 |
| RHP140357/5 | Sections (as existing) | Jun 1977 |
| RHP140357/6 | Block and locality plan (as proposed) | Jun 1977 |
| RHP140357/7 | Ground and first floor plans (as proposed) | Jun 1977 |
| RHP140357/8 | Elevations (as proposed) | Jun 1977 |
| RHP140357/9 | Sections (as proposed) | Jun 1977 |
| RHP142637 | Architectural drawings of Royal Hotel, Invergordon | 1973 |
| RHP142637/1 | Royal Hotel, Invergordon: ground floor and cellar plans | Aug 1968-21 Mar 1972 |
| RHP142637/2 | Royal Hotel, Invergordon: first and second floor plans | Aug 1968-21 Mar 1972 |
| RHP142637/3 | Royal Hotel, Invergordon: first and second floor plans and section | 14 Sep 1972 |
| RHP143400/8/21 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 NE | 1960s-1970s |