| RHP6294 | Plan of the town of Preston with the barricades and cannon of the rebels and the disposition of the King's forces under the command of Lieut. Gen. Carpenter and Major Gen. Wills | 1715 |
| RHP12211 | Plan of Liverpool Docks | 1853 |
| RHP12346 | Photostat copy of plan of the manor of Ashton belonging to the Duchess of Hamilton and Brandon | Late 17th century |
| RHP20661 | Map (6 sheets) of the county palatine of Lancaster. (Vignette of Liverpool) | 1818 |
| RHP23148 | Chart of the harbour of Liverpool (River Mersey and adjacent counties), corrected to 1781. (Damaged; in 3 pieces) | 1771/1781 |
| RHP24476 | Photocopy of plan of the Duke of Bridgewater's curious weir (whose circumference is 366 yards) in Castlefield near Manchester | Late 18th century |
| RHP35088 | Blueprint plan, showing residential, industrial and amenity areas in Skelmersdale, and the part of the town served by Quarry Bank [Centre] | 1968 |
| RHP35089 | Blueprint site plan of Quarry Bank Social Centre, Skelmersdale | 1968 |
| RHP35090 | Architectural drawings of Quarry Bank Social Centre, Skelmersdale | 1968 |
| RHP35091 | Interim plan of Skelmersdale development, showing proposed distribution of population, industrial, residential and amenity areas, and the location of [Quarry Bank Centre] | 1964 |
| RHP35092 | Site plan of Quarry Bank Social Centre Skelmersdale, showing layout of gardens and car park | 1968 |
| RHP35093 | Copy of Ordnance Survey 6 inch plan marked to show the boundaries of the Skelmersdale development, and the site of the Development Corporation's temporary office; [post 1955] | 1955 |
| RHP38182 | Plans of propsed works for the Lancaster Canal, England | 1819 |
| RHP38347 | Ordnance Survey. 6 inch plan (Lancashire, sheet LXXV.SW) marked to show proposed light railways [street tramways] of Southport Corporation. | 1923 |
| RHP38352 | Part of Ordnance Survey 1 inch map showing railways in Preston area. | 1923 |
| RHP38355 | Ordnance Survey 1 inch map marked to show proposed Leigh Corporation omnibus routes. | 1927 |
| RHP38356 | Part of Ordnance Survey 1 inch map marked to show proposed Warrington Corporation [omnibus] routes. | 13 March 1931 |
| RHP43144 | Architectural plan and elevation of Family Welfare Centre in Kirkby. | 1960 |
| RHP43145 | Architectural plan and elevation of Family Welfare Centre in Kirkby. | 1961 |
| RHP44643 | Bound architectural plans, elevation and section (7) of 30 Red Cross Street, Liverpool. | 1935 |
| RHP44644 | Architectural plan, elevation and section of alterations at 22 Red Cross Street, Liverpool. | 1947-1948 |
| RHP46931 | Sketch plan showing location of Brantwood in relation to other sites of interest to nature lovers | 1963 |
| RHP46932 | Sketch plan of site at Brantwood, with photographs and location plan affixed | 1963 |
| RHP46933 | Architectural drawings of scheme for development of Brantwood, Coniston, Lancashire, England | Apr 1963 |
| RHP46934 | Plan of site of proposed car park for Brantwood, near Coniston | June 1965 |
| RHP46935 | Architectural plan (drawing no.1) of ground floor of bunk house (garage and stable) at Brantwood, with site plan | 30 June 1965 |
| RHP46936 | Architectural plan (drawing no.2) of first floor of bunk house (garage and stable) at Brantwood | 30 June 1965 |
| RHP46937 | Architectural section (drawing no.3) of bunk house (garage and stable) at Branwood | 29 June 1965 |
| RHP46938 | Architectural plan (drawing no.4) of alterations to ground floor of bunk house at Brantwood | 3 July 1965 |
| RHP46939 | Architectural plan (drawing no.5) of alterations to first floor of bunk house at Brantwood | 3 July 1965 |
| RHP46940 | Architectural plan of proposed modifications to kitchen/staff quarters and servery to Ruskin's dining room [at Brantwood] | [19 Aug 1965] |
| RHP46941 | Diagram plan of proposed layout of water services at Brantwood House | [19 Aug 1965] |
| RHP47484 | Plan entitled "Combined view of the Monkland and Kirkintilloch, Ballochney, Slamannan, Wishaw and Coltness and the Wilsontown, Morningside and Coltness Railways" showing their connection and relations. On reverse: Manuscript plan of railway sidings and goods yard, Stanley Road, [Southport]. [Late 19th century] | Aug 1842 |
| RHP72625 | Paper making machine for Jean Felber & Company: Plan and elevation | 1872 |
| RHP72680 | Paper making machine No. 199 for James Wrigley & Sons Ltd, Bury: Plan and elevation. | 1914 |
| RHP72696 | Paper making machine No. 213 for Barrow Paper Mills Ltd: Plan and elevation. | 1929 |
| RHP72701 | Board making machine No. 216 for Burnley Paper Works Ltd: General Arrangements. | 1932 |
| RHP72702 | Board making machine No. 216 showing extensions for Burnley Paper Works Ltd: General Arrangements. | 1934 |
| RHP72703 | Board making machine No. 216 showing extensions for Burnley Paper Works Ltd: General Arrangements. | 1937 |
| RHP72704 | Combination machine No. 217 for Chipboard and Roofing Felt for Radcliffe Paper Mill Company Ltd: Plan. | 1934 |
| RHP72705 | Combination machine No. 217 for Chipboard and Roofing Felt for Radcliffe Paper Mill Company Ltd: Elevation. | 1934 |
| RHP72706 | Roofing Felt machine (127 ins.) No. 217 (before alterations) for Radcliffe Paper Mill Company Ltd: Arrangement. | 1927 |
| RHP72712 | Paper making machine No. 225 for New Waterside Paper Mill, Darwen: General Arrangement. | 1946 |
| RHP72718 | Paper making machine No. 235 for Barrow Paper Mills: General Arrangement. | 1954 |
| RHP72719 | Paper making machine No. 236 for Darwen, Lancs.: Arrangement of Voith Flow Box. | 1955 |
| RHP72758 | Super Calender No. 962 for Charles Turner & Company Ltd, Belmont: Arrangement. | 1920 |
| RHP72820 | Horizontal Reel Drum No. 21 for John Wild & Sons Ltd, Radcliffe: General Arrangement. | 1962 |
| RHP72825 | Drum Wrapping Machine Nos. 2 and 5 for British Goodrich Rubber Company Ltd, Leyland: Arrangement | 1929 |
| RHP72826 | Drum Wrapping Machine Nos. 7 for British Tyre and Rubber Company Ltd, Leyland: Arrangement | 1935 |
| RHP72838 | "Celdecor" Straw Cutters Nos. 17 & 18 for East Lancashire Paper Mill Company Ltd, Radcliffe: General Arrangement | 1948 |
| RHP72857 | Breaker No. 1640 for Radcliffe Paper Mills Company Ltd: General Arrangement. | 1938 |
| RHP72876 | Refiner (Large) No. 63 for J. Wrigley & Sons, Bridgehall Mills, Bury: General Arrangement. | 1919 |
| RHP72960 | Patent Recovery Plant: Plan and elevation (Ernest Scott & Company, Engineers, London, Glasgow and Manchester. | 1908 |
| RHP72961 | Patent Recovery Plant: Plan and elevation (Ernest Scott & Company, Engineers, London, Glasgow and Manchester. | 1908 |
| RHP72973 | "Celdecor" Screw Presses Nos. 6 & 7 for Wiggins Teape & Company (1919) td, Lancaster Straw Pulp Mill: General Arrangement. | 1947 |
| RHP82461 | Maps of (1) Lakes in Cumberland; (2) Lakes in Lancashire and Westmorland | [c 1821] |
| RHP83508 | Plan of junction of Blackfriars Road and Gravel Lane, [Manchester,] showing tramlines | [1937] |
| RHP86247 | Photocopy of rental volume containing sketch plans of Duke of Hamilton's estates at Cleveley etc, with details of acreages and crop rotation | 1841-1845 |
| RHP86248 | Photocopy of plan and section of proposed line of railway in parishes of Garstang and Saint Michael on Wyre from near Bower House to near Tarnacre House | [Mid 19th century] |
| RHP88257 | Section of proposed water troughs at Brock (London and North Western Railway) | [c 1923] |
| RHP89378 | Photocopy of architectural plan of cellar floor of [Ashton Hall] | [Late 18th century] |
| RHP89379 | Photocopy of architectural plan of chamber floor of [Ashton Hall] | [Late 18th century] |
| RHP89380 | Photocopy of architectural plan of timber framing for chamber floor of [Ashton Hall] | [Late 18th century] |
| RHP89381 | Photocopy of architectural plan and sections of roof of [Ashton Hall] | [Late 18th century] |
| RHP89382-89386 | Photocopies of architectural details of [Ashton Hall] | [Late 18th century] |
| RHP89387 | Photocopy of architectural plan and elevation of granary addition at [Ashton Hall] | [Late 18th century] |
| RHP93647 | Plan of Knight Hill Estate, Padiham, the property of Lord Montague, including proposed cemetery | Jan 1835 |
| RHP93648 | Plan of the parish of Whalley | 1831 |
| RHP93651 | Plan of area around Barrow-in-Furness, showing land under which salt may be extracted by Barrow & Liverpool Salt Co, Ltd | [Late 19th century] |
| RHP93652 | Plan of area around Barrow-in-Furness, showing location of boreholes in salt mining area, with geological profiles of Biggers nos.2-4 and North Scale no.5 boreholes on Walney Island | 5 Jan 1894 |
| RHP93653 | Geological profile of Walney no.1 and North End no.6 boreholes on Walney Island | 5 Jan 1894 |
| RHP93660 | Plan of railway network in Lancashire and Yorkshire, showing proposed Manchester and North Lancashire Railway | [c 1860] |
| RHP94169 | Plan of estate in the township of Swinton to be sold for the erection of villas, the property of John Barton, with table of reference | 1835 |