| RHP159 | Plans of part of Udale Bay, Cromarty | 1850-1851 |
| RHP159/1 | Chart of the Cromarty Firth from Invergordon to Cromarty, Ross and Cromarty | 12 Feb 1851 |
| RHP159/2 | Chart of part of Udale Bay, Cromarty | 1851 |
| RHP159/3 | Sketch Plan of the stake nets in Udale Bay, Cromarty | 1850 |
| RHP5494 | Photograph of plan of the davoch of Davidston. | 1748 |
| RHP5495 | Photograph of plan of the davoch of Peddieston (Pedestown) | 1748 |
| RHP5496 | Photograph of plan of Little Farness (Littel Pharnes). | 1748 |
| RHP5497 | Photograph of plan of the davoch of Mickle Farness (Mickle Pharnes) | 1748 |
| RHP5498 | Photograph of plan of the grounds and inclosures about Cromarty Castle and Hill | 1753 |
| RHP6393 | Plan of the estate of Cromarty, Ross and Cromarty | 1825 |
| RHP13244 | Sketch plan of Cromarty Harbour: 1891. | 1891 |
| RHP14287 | Plan of proposed road from Reyflat to Davidston, including plan and section of proposed bridge across Reyflat Burn: [19th century] | 19th century |
| RHP14288 | Sectional plan of proposed road road from Reyflat to Davidson: [19th century] | 19th century |
| RHP14289 | Plan of proposed road from Davidson to road junction [at Newton]: [19th century] | 19th century |
| RHP14290 | Sectional plan of proposed road form Davidson to road junction [at Newton]: [19th century] | 19th century |
| RHP17882 | Bound plans and sections for Cromarty and Dingwall Light Railway | Nov 1896 |
| RHP18087 | Bound plans and sections of the Cromarty and Dingwall Light Railway, including deviation of said railway at Jemimaville. | 1896, 1899, 1906. |
| RHP18088 | Bound plan and section of deviation at Jemimaville of the Cromarty and Dingwall Light Railway. | 1906 |
| RHP34723 | Sketch of stone lifting grab [at Cromarty Mains]. | 1908 |
| 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] |
| RHP79294 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXVIII) marked to show farm boundaries | [1944-1955] |
| RHP79295 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXIX) marked to show farm boundaries | [1944-1955] |
| RHP82281 | 1. Ordnance Survey 1/2500 plans (2, attached) marked to show proposed works under Cromarty Harbour Provisional Order: November 1878
2. Plan and sections of proposed works at Cromarty Harbour: November 1878
3. Provisional order | Nov 1878 |
| RHP82468 | Sketch plan of farm steading and field [at Udale Farm] | [1902] |
| RHP93953/15 | General plan of Cromarty Harbour | [1947-1951] |
| RHP97681 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) marked to show classification of land | [1944-1954] |
| RHP97682 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVII) marked to show classification of land | [1944-1954] |
| RHP143400/8/25 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 76 SE | 1960s-1970s |
| RHP143400/8/26 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 76 SW | 1960s-1970s |