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Ty Mawr (Great House)

A Grade II Listed Building in Bonvilston, Vale of Glamorgan

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Latitude: 51.4571 / 51°27'25"N

Longitude: -3.3476 / 3°20'51"W

OS Eastings: 306467

OS Northings: 173981

OS Grid: ST064739

Mapcode National: GBR HQ.MDP4

Mapcode Global: VH6F9.XMMW

Plus Code: 9C3RFM42+RX

Entry Name: Ty Mawr (Great House)

Listing Date: 28 January 1963

Last Amended: 31 July 1995

Grade: II

Source: Cadw

Source ID: 13603

Building Class: Domestic

Location: Prominently situated on S side of A48, opposite parish church.

County: Vale of Glamorgan

Community: St. Nicholas and Bonvilston (Sain Nicolas a Thresimwn)

Community: St. Nicholas and Bonvilston

Locality: Bonvilston

Built-Up Area: Bonvilston

Traditional County: Glamorgan

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C16 origins and late-Georgian remodelling.


House of early C19 date of two storeys and double pile plan with slated valley roof and stuccoed elevations, four gable end rendered stacks. Front elevation of three bays, approximately symmetrical with central doorway. Distinctive front portico carried on Ionic pillars with flat entablature, later four panelled front door. Horned 12 pane sash windows, the stair window to centre is set at a slightly lower level, again with horns set within reveals. The stair window has diamond leaded light and C19 coloured glass. Rear elevation has similar C19 sashes, rear W reception room has square Edwardian bay, whilst E reception room has a three sided bay. Single storey lean-to extension to W side elevation. W side of house an early C19 coach-house (now modified) and stable block which flanks the highway, each of variously rendered and limewashed rubble elevations, with slated roofs. The stable block has a gable stack at the E end.


A fine historic interior of strong early C19 character remains. Symmetrical plan of front and rear reception rooms flanking a central hallway with original dog leg staircase with stick balusters and closed string, scrolled mahogany handrail with grained finish. Four panelled door beneath stair to cellars. The hallway has a Victorian encaustic tile floor and six panelled doors with panelled doorcases, being centrally subdivided by a plaster archway with raised and fielded panels. Servant stair rises from W side of hallway between front and rear rooms to first and second floors. Front W room retains original C19 kitchen fittings with glazed rear doorway to scullery with rectangular fanlight over. Each with fine glazing bars. Mid C19 fire surrounds to ground floor and simple contemporary cornices and skirtings of various designs. Rear E reception room has a matt black slate fire surround with scrolled corbels and moulded jambs. Front W and rear W rooms have exposed large ceiling beams with broad chamfers of C16 type, no stops exposed. Other rooms have plain plastered ceilings. First floor follows similar plan to ground, with rear room at end of hallway being subdivided to form two bathrooms. Two W rooms have doorway to servants stair. All rooms have four panelled doors within panelled doorcases. First floor hallway similarly divided by large plaster archway with raised and fielded panels. Regency grates surviving within front E and rear W rooms, the remainder are later C19. Simple cornices and skirtings to all first floor rooms. Attic not inspected.

Reasons for Listing

Listed grade II as an unaltered example of an early C19 house incorporating an earlier house. Notable for its intact C19 character.

Recommended Books

Other nearby listed buildings

  • II Churchuard Cross at Parish Church of St Mary
    Situated in the churchyard immediately to the S of St. Mary's parish church which is located on the N side of the A48 at the W edge of the village, opposite the Great House.
  • II Parish Church of St Mary the Virgin
    Located on the N side of Cardiff road at the W end of the village opposite the Great House, elevated from the road
  • II Bonvilston Cottage
    Located on the N side of the A48, to the W of Bonvilston Parish Church of St. Mary, set back of the road behind a high limestone rubble wall.
  • II Village Farmhouse
    Located at centre of Bonvilston Village on Cardiff Road.
  • II Cottrell Lodge
    Located at entrance to Cottrell Park, now a golf club.
  • II Cae'rwigau Uchaf
    Farmhouse set in open countryside to south of Pendoylan village upon a platformed site to the east of the Cae'rwigau moated site.

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