LISTED BUILDING/ANCIENT MONUMENT DESCRIPTION Reference No: 70006 Parish: Perranuthnoe Address: Acton Castle Rosudgeon Date Listed: 9 October 1987 Penzance Cornwall TR20 9PF Grid Ref: 155153 28444 Description: ACTON CASTLE Description: PERRANUTHNOE SW 52 NE 3/95 Acton Castle- II*Country house. Circa 1775, extended later C18 and again circa late C19. Built for John Stackhouse, the eminent botanist. 'Granite and elvan ashlar with dressed granite details. Grouted hipped scantle slate roofs behind embattled parapets. Dressed granite embattled chimneys over projecting corner piers. Plan: central original 2-room plan 3-storey over service basement block with central large stair hall between the rooms. Circa later C18 identical .2 storey 2-rooms wide wings were added at either side, each wing with octagonal rooms far right and far left. All built in similar classical style but with battlements and other medieval style details. Circa late C19, service rooms were added behind the original block and at about the same time a circular stair tower, with granite newel stair, was added behind the right hand wing. Exterior : 3 storeys over basement main block flanked by 2-storey wings. 2:3:2 bays south front, the central 3 bays and the clasping turrets are broken forward and rise above the parapet with battlements (the sides, and the rear similar to the front but now partly concealed by C19 range). The wings have canted front bays, far left and right. Granite ashlar basement as plinth, elvan ashlar above; mid-floor bands to parts that are broken forward and to the wings and a moulded cornice to the embattled parapet over the central block. The wings have battlements which survive over the octagonal bays only. Tripartite windows to all bays, those of the main block unaltered with original granite mullions supporting the springing for flat arches over the middle lights. Original hornless sashes to the first floor. The wings have iron casements in openings with sills lowered circa 1930s and replaced granite mullions. Flanking the windows of the bays are blind cruciform pistol loops, and these are also in the other faces of the octagonal ends. There are small window openings (cut in the C20) to the front of the wings on either side of the main block; ground and first floor left and first floor right. Interior : Original stair and complete C18 room left of the entrance, C18 floors, probably C18 roof structure and some other C18 features including panelled doors. The stair has open well and open string with slender column-turned balusters and ramped mahogony handrail. The left-hand room has panelled walls, a ceiling cornice with triglyphs and an eared Adam style chimneypiece. In the right hand room is a circa mid-C19 moulded ceiling cornice with robust egg and dart over bead and reel and carved trailing band. Linking the first floor rooms at the rear of the stair hall is an axial passage with a circa late C19 barrel vaulted ceiling with bold ribs. The ground floor rooms of the wings are now large rooms. John Stackhouse used this house as a laboratory for his research into marine life particularly seaweed and it is possible that the wings were built to be used for this purpose. Acton Castle is similar to The Manor Office (formerly Trevelyan House qv., Marazion and Tregenna Castle qv. St Ives, by John Wood the Younger all of circa 1775 and possibly by the same architect).Listing NGR: SW5515228445Type and date: circa 1775 COUNTRY HOUSE. Date: from 1755 to 1795Type and date: Late C18 COUNTRY HOUSE. Date: from 1767 to 1799Type and date: Late C19 COUNTRY HOUSE. Date: from 1867 to 1899Type and date: C19 COUNTRY HOUSE. Date: from 1800 to 1899Main material: graniteMain material: elvanMain material: ashlarCovering material: slate.