Y Gelli (formerly Grove House and also Ty Nant)

This is a large, elegant town house of roughly T-plan, dating from the Elizabethan period with substantial alterations in the 17th century and later additions. The main block is constructed of red/brown brick in Flemish bond, with limestone rubble foundations, and has a renewed slate roof, hipped to the main section. The street-facing facade is a symmetrical five-bay, two-and-a-half-storey building with sandstone quoins, a plinth, and a string course, all now painted. The central bay, which contains the entrance, is slightly advanced and features a moulded doorcase accessed by semi-circular stone steps, with fluted pilasters and a modern six-panel door and rectangular overlight. The tall windows are modern replacements with 18 panes, set flush with flat arches and projecting keystones. A heavily-moulded modillion eaves cornice runs along the top, and three large hipped dormers, dating from around 1900 and featuring 12-pane casements and similar cornices, are set into the roof.

To the rear of the main block are two large gabled lateral chimneys, that on the right partly incorporated into a later projection. These are of rubble construction with three grouped, offset brick stacks having moulded cornices, though the left-hand chimney stacks are replacements from around 1900. A hipped-roofed stair projection sits between the two chimneys. A largely modern, irregular brick rear range extends nearly the full height of the main block, featuring small-pane casement windows, mostly modern replacements. The gable of the rear range is pebbledashed, with a modern fire escape to the inner return and catslide and gabled additions to the outer.

An inscribed sandstone plaque on the rear of the primary block reads: 'Repaired by T E S 1693'. A companion plaque, recorded in 1856, inscribed 'Builded by Hvgh Clovch 1574', is now lost.

The central entrance hall leads to the flanking main rooms and a stairwell, partly contained within a rear projection. A very fine, wide oak staircase of a narrow well form rises through the house, with a balustrade that returns to form a short first-floor landing. The balustrade features fluted columnar balusters and a swept, moulded rail, scrolled at the bottom, with fluted columnar newels. A panelled stair dado with a fluted pilaster, moulded dado rail and large fielded panels runs alongside the staircase. A stained glass window from around 1900 on the landing features coloured foliate decoration, a central quatrefoil motif, and an heraldic crest with a garter and Latin motto. The main ground floor room to the right has plastered wall panels and a dado, also dating from around 1900. A moulded cornice from the 1690s is present, along with a fireplace featuring flanking fluted pilasters and a wooden lugged and fielded surround, expressed keystone, dentilated and heavily-moulded cornice and mantelpiece. A late 18th-century reeded iron grate is set within the fireplace. The attic floor retains primary Elizabethan partition trusses of Queen Post type, with pegged joints and stopped-chamfered purlins.

The building has undergone extensive modern internal partitioning.