North-west Range at Mostyn Hall Farm

Large-scale farm building comprising long range running up-slope aligned NE-SW, with drift-way through to outer yard towards the NE end, and 2 parallel gabled wings to the SE elevation into the main yard. This building is linked by a lower range at the SW end to the former stable range which forms the SW boundary of the farmyard.

Rubble stone under slate roofs with coped gables. Elevation to yard has high voussoir-arched driftway towards R; small upper windows and 2 tiers of vents in R bay (its lower wall concealed by later pigsties). Above and L of the driftway, 2 advanced wings: coped gables have ball finials; original arrrangement of openings similar in each gable and loosely symmetrical. Three lower openings: central doorway and flanking windows to L-hand gable; doorway to R in R-hand gable. Above, loft doorway and single window in R-hand gable; central loft doorway with 2 flanking windows in L-hand gable. Voussoir heads to these openings, boarded doors to ground floor, louvres to windows and upper openings. Brick roundel in apex of L-hand gable. Later lean-to on lower return of left-hand wing. Later pigsties adjoin NE corner of the main range: stone walls and lean-to slate roofs enclosing 4 pens.

NW elevation has 2 large arched entries, the drift-way entry towards the L, and a further entrance to R of centre: both have rubble voussoirs to relieving arches over timber lintels. Three tiers of vents in R-hand section, and in central bay which also has loft entry and blocked doorway with ashlar voussoir-arched head. Further doorway with brick-arched head immediately R of the drift-way. Single window with ashlar voussoirs to shallow head and 3 tiers of vents in bay to its L. Small upper storey window in upper gable end, and vents into gable apex.

A lower range at right-angles to the SE links this building with the former stable block. This range (which appears to be slightly later than the main range) has doorway and window, both with stone voussoir heads, to ground floor of yard elevation, and single 2-light stone mullioned window above. Inserted doors in its upper elevation, but earlier voussoir-headed window, with 2-light stone mullioned window above, to R of doorway.

Not fully inspected, but queen-post and collar trusses visible. Some internal subdivision, and partial remains of C19 machinery (apparently powered by a water-wheel housed beneath one of the gabled wings).