L-shaped house with a service wing.

Minor alterations and garden laid out by Voysey in 1894.

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, photo courtesy of John Trotter

Walnut Tree Farm, Castlemorton, Malvern,
photo on rightmove.co.uk

Walnut Tree Farm, Castlemorton, Malvern,
photo on rightmove.co.uk

Walnut Tree Farm, Castlemorton, Malvern,
photo on rightmove.co.uk

Walnut Tree Farm, Castlemorton, Malvern,
photo on rightmove.co.uk

Walnut Tree Farm, Castlemorton, Malvern,
photo on rightmove.co.uk

Image published in The British Architect, 14th December 1894.

Image published in Duncan Simpson, C.F.A. VOYSEY an architect of individuality, p.33

Link > RIBA Drawings Collection

Walnut Tree Farm, Floor Plans

Walnut Tree Farm, Ground Floor Plan
published in Country Life Illustrated 1899-10-28, Vol 6 Iss 147, p.526

Walnut Tree Farm, Bedroom Floor Plan
published in Country Life Illustrated 1899-10-28, Vol 6 Iss 147, p.526

Description on Historic England

HOUSE

SO 73 NE CASTLEMORTON B 4208 1430/4/44 Bannut Tree House 23.02.1987 GV II*
Alternatively known as: WALNUT TREE FARM House. 1890, by C F A Voysey. Roughcast with some applied timber-framing and tile roof. L-plan. One storey with attic. Windows have timber mullions and leaded glazing in rectangular panes. South facade, facing garden, has four gabled attic dormers with applied close-studding above the windows. At the left is a smaller dormer with flat roof. The upper storey oversails and is supported on buttresses. To the right of the first attic dormer is a chimney, with a chimney breast on the ground floor which is splayed at the left and contains a window: At first floor level is a plaque inscribed: "1890". The recess to the right of the chimney breast has a window, with a small window at the right against a buttress, lighting an inglenook. To the right of this buttress is another recessed window. To the right, under the second gable, is a window set forwards flush with the upper storey. Under the third gable a flat-roofed timber porch projects forwards on a roughcast base. At the right of the facade the upper storey forms a right-angle and the ground floor window is canted, continuing on the return wall. To the right of the first gable is a second chimney; forward of the ridge. At the rear the roof swept down to low eaves and the doorway is protected by a tiled gabled canopy on brackets. The house was originally known as Walnut Tree Farm: Preliminary and final designs for the house,- with perspectives of the garden front; are in the RIBA drawings collection (BOE; p ll5) INTERIOR largely complete with original features, including fireplaces, ledged-and-braced doors with ornate wrought-iron hinges, picture rails, window seats, unchamfered ceiling beams, and the staircase with simple stick balustrade, moulded handrail and tall pointed newels.
SOURCE: Nikolaus Pevsner, Buildings of England, Worcestershire, 1968, p.115.

STABLES

CASTLEMORTON CP B 4208 SO 73 NE Stables north of 4/45 Bannut Tree House and garden wall adjoining to east II GV Stables and wall. 1890 by C F A Voysey. Roughcast with tile roof. Single storey with loft. Four bays. Shallow horizontal windows are divided by timber mullions and have rectangular leaded panes. Doors, between first and second bays and third and fourth bays, have iron strap hinges. Eaves over-hang, with gutters carried on slim curved iron brackets. Chimney on ridge in line with third bay. Gables have applied close-studded timbering to upper storey, which has loading doors at both ends. Rear wall has buttresses at intervals and continues to east to form garden wall.

Pevsner's Worcestershire (with Alan Brooks, 2007) says:

BANNUT TREE HOUSE (originally Walnut Tree Farm), 2/3m m WNW [of Castlemorton]. Dated 1890, the first medium-size country house by C.F.A. Voysey; L-plan, with great emphasis on horizontals, mullioned windows, and big roofs, their almost detached gutters on this curved brackets. But the main (garden) front, S, has four even gables with half-timbering, a motif Voysey later more or less discarded. The upper floor is jettied out, though this is disguised by the picturesquely detailed chimney, L, by typically sloping buttresses, by the projecting garden porch, and also by the nice solution of the R corner, where the ground-floor window bay is polygonal but the floor above just out at a right angle. End gables again half-timbered; E front of the service wing with more pronounced horizontal emphasis. On the N entrance front the tiled roof sweeps down to low eaves, with a large roughcast gable in the angle; broadly gabled porch on sloping piers.

The plan is simple: a corridor along the entrance side at both levels, with the stick-balustraded staircase, E end; three reception rooms along the S front. Most original fittings survive.

Opposite the entrance front, forming an open court-yard, the contemporary stable block, rectangular and also decidedly horizontal. Typical rear buttresses continue as a boundary wall towards the c17-c17 cottage. Minor alterations by Voysey, 1894, when he laid out the garden.

References:

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Vernacular buildings with rows of gables.

Benthall Hall, photo by Tony Hisgett on flickr

Tudor house with a row of gables.
The main body of the house was extended and developed by Sir John Dawtrey (1518).
Tudor House Museum, Southampton, photo by Carlesmari, Wikipedia

Leicester Guildhall, photo by NotFromUtrecht on Wikipedia
Link > www.visitleicester.info

Tudor house with a row of gables,
90-92 West Street, Warwick, photo by Greg J on tripadvisor.com

Lincoln, photo on shutterstock.com

Ludlow, The Feathers Hotel, photo by Eddie Crutchley on flickr