Plas Nantglyn

Entrance hall with parquet floor and Edwardian half-turn oak stair with shaped balusters. To the R of this is an in situ section of primary post-and-panel partition, formerly dividing the parlour from the hall. Of oak, the partition has a cross-rail (reflecting early fashion) and a central Tudor-arched entrance, now blocked. The spandrels of this are carved in relief: 'Anno Domini 1573'. Plain joists and large chamfered main beam to ceiling. The former hall has a ceiling framed in three ways (in the manner of the more elevated early storeyed houses), with stopped-chamfered main and secondary beams and similarly-decorated joists. One face of the main beam has a relief-carved inscription 'Anno Domini 1574', reversed, mirror-wise. Large, wide fireplace with dressed limestone quoins and contemporary flat, oak bressummer with complex gadrooned decoration.

Two Art Nouveau-style iron fireplaces in first floor rooms. The roof structure is entirely C20.

Large 2-storey house of J-plan. Carefully constructed of long, rough-dressed slatestone blocks, roughly-coursed; under a renewed slate roof with plain, oversailing verges and tiled ridge. Five large brick chimneys with oversailing upper courses; these are modern copies of their Edwardian predecessors. The garden facade (facing E) has a 5-bay primary section with a gabled single bay cross-wing addition advanced to the R. Tripartite, 4-part and 2-part casement windows to both floors, made up of multiples of 8-pane sections; projecting slatestone sills and exposed timber lintels throughout. Extruded in the angle between the primary block and the cross-range is a modern glazed conservatory addition. The entrance front is recessed between two gabled wings, that to the L the northern cross-wing already mentioned and that to the R a longer service wing. A single-storey outshut runs along the whole length of the main block, with 2 tripartite windows and an entrance to the far L; this has a simple timber gabled porch with boarded door. The first floor of the main block has 2 similar windows. The service wing return wall has single, double and tripartite windows, as before, with a further tripartite window in a gabled roof dormer. The rear of this range has a central service entrance with cambered head and part-glazed door; further cambered windows to the ground floor L and to both floors of the main block's advanced gable to the R. The N side of the cross-wing has 2 lateral chimneys, that to the L flush and that to the R with large projecting, gabled breast. Flanking this on the first floor are simple timber-framed oriels, supported on plain brackets; windows as before.

A tall rubble garden wall adjoins the service wing flush on the garden side.