| RHP762/1-3 | Charts of Plymouth Sound, Portland and Weymouth and Falmouth and Helford, Dorset, England | 1759 |
| RHP3180 | Plan and sections of a dry dock near Torbay: [late 18th - early 19th cent.] | Late 18th century |
| RHP6983 | Admiralty chart of Plymouth Sound and Hamoaze: 1906 (Vignettes of pictorial views) | 1906 |
| RHP9717/37 | Pictorial elevation of intended chapel of the Holy Evangelists in Killerton | 1841 |
| RHP9717/38 | Architectural plan of Killerton Chapel | 1842 |
| RHP9729 | Title page from Ordnance Survey 1 inch maps (Somerset, Devon and Cornwall) | 1809 |
| RHP9730 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XX) | 1809 |
| RHP9731 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXV) | 1809 |
| RHP9732 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXIV) | 1809 |
| RHP9733 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXIII) | 1809 |
| RHP9734 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXII) | 1809 |
| RHP9735 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXVI) | 1809 |
| RHP9736 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXI) | 1809 |
| RHP9737 | Ordnance Survey 1 inch map (Somerset, Devon and Cornwall, Sheet No XXVII) | 1809 |
| RHP20641 | Map (9 sheets) of the county of Devon: 1825-26, published in 1827. (Vignette of Exeter Cathedral) | 1825-1826 |
| RHP30928 | Photocopy of sketch plan of Stanbride Wester Middle Park belonging to John Dufty. | 1787 |
| RHP30929 | Photocopy of sketch plan of Waycleave Wood belonging to John Dufty. | 1784 |
| RHP38422 | Plan showing main routes to Kents Cavern. From tourist guide | 1971 |
| RHP41692 | Architectural plan, elevation and section of proposed byre for 30 cows at Portlemore Farm for Major W. Waring: | 1927 |
| RHP41693-41698 | Architectural plans, elevations and sections of proposed extension to byre at Portlemore Farm, Kingsbridge, South Devon, for Major W. Waring, DL: | 1928 |
| RHP43165 | Architectural plan of Rougemont House, Exeter. | 1965 |
| RHP72948 | Grass Plant for Reed & Smith Ltd, Silverton Mills: Arrangement. | 1926 |
| RHP117004 | Admiralty chart of the coast of Somerset and Devon (sheet 1160) | 1983 |
| RHP140395 | Architectural drawings of proposed farm buildings, Devon, England | Mar 1973 |
| RHP140395/1 | Farm buildings, Devon, England. Layout plan | Mar 1973 |
| RHP140395/2 | Farm buildings, Devon, England. Details | Mar 1973 |
| RHP141756 | Plan of Langlee farm, Kirkcudbrightshire, and drawing of Eddystone Lighthouse, England | early 19th century |