| RHP11661 | Plan of proposed road from the Point of Fortrose to the junction with the Beauly Road near Conon Bridge. | 1814 |
| RHP13243 | Sketch plan of Avoch Harbour: 1891. | 1891 |
| RHP18089 | Bound plans and sections of proposed harbour at Avoch. | 1894 |
| RHP23865 | Bound plans and sections of proposed works at Avoch Harbour. | 1902 |
| RHP31451 | 1. Photocopy of plan of estate of Auchterflow. 2. Photocopy of measurement, rental and valuation (annexed to plan) 3. Photocopy of sale particulars | 1853 |
| RHP31453 | 1. Photocopy of plan of estate of Ormond Castle. 2. Photocopy of measurement, rental and valuation (annexed to plan) 3. Photocopy of sale particulars | 1853 |
| RHP31454 | 1. Photocopy of plan of domain of Rosehaugh and The Suddies, the property of Sir James John Randall Mackenzie, bt. of Scatwell, 2. Photocopy of coloured version of same showing boundaries 3. Photocopy of MS rental. | 1848-1849,1850 |
| RHP38311/5 | L.M.S. Railway, Northern Section: Gradient profiles, stations etc | 1937 |
| RHP78848 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXXIX.NE) marked to show farm boundaries | [1944-1955] |
| RHP78850 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXXIX.SE) marked to show farm boundaries | [1944-1955] |
| RHP79293 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXVII) marked to show farm boundaries | [1944-1955] |
| RHP79294 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXVIII) marked to show farm boundaries | [1944-1955] |
| RHP79303 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet XC) marked to show farm boundaries | [1944-1955] |
| RHP82290 | 1. Bound plans and sections of Avoch Harbour Provisional Order:
2. Book of reference (Gazette notice bound in) | Nov 1894 |
| RHP93953/3 | General plan and sections of Avoch Harbour | Jan 1949 |
| RHP131597 | Weight diagram showing elevation, plan and sections of bridge carrying Muir of Ord/Fortrose Road (A833) over Fortrose Branch Railway between Munlochy and Avoch Stations (London, Midland and Scottish Railways) | c 1933 |
| RHP131598 | Weight diagram showing elevation, plan and sections of bridge carrying Killen Road, Avoch over Fortrose Branch Railway between Avoch and Fortrose Stations (London, Midland and Scottish Railways) | c 1933 |
| RHP142013 | Plans of proposed extension to Avoch burial ground, Ross and Cromarty | 1 Dec 1978-Jan 1979 |
| RHP142013/1 | Avoch burial ground, Ross and Cromarty: plan | 1 Dec 1978 |
| RHP142013/2 | Avoch burial ground, Ross and Cromarty: location plan | Jan 1979 |
| RHP143400/8/17 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 65 NW | 1960s-1970s |
| RHP143400/8/18 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 65 NE | 1960s-1970s |
| RHP143400/8/19 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 65 SE | 1960s-1970s |
| RHP143400/8/22 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 SE | 1960s-1970s |
| RHP143400/8/24 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 75 NW | 1960s-1970s |