Isca Grange, including attached forecourt railings and gate

Isca Grange is a house that is entirely covered in roughcast render, likely over local rubble stone, and features Welsh slate roofs with red ridge tiles and brick chimneys. The building has a central entrance plan, with extensions at both ends and single-storey lean-tos. It stands two storeys high with an attic in the main block, while the additions are two storeys tall and the lean-tos are single storey.

The central entrance has a six-panelled door, with the upper four panels glazed, framed by a plain architrave. To the left of the door is a wide splayed bay, which has reed moulded architrave and a slate roof; this bay contains six over six pane sash windows flanking a twelve over twelve pane window. This feature is likely an early 20th-century addition, and there was a matching one on the right side that has since been removed, leaving a blank wall.

On the upper floor, there are five windows, all six over six sashes with plain architraves, and three flat-headed dormers. The slate roof has gable ends. The property is also adorned with cast iron forecourt railings featuring spear heads and urns, along with gates at the front. The left addition includes another six over six sash window on the upper floor and a modern window in the lean-to, while the right addition is simpler in design. The rear elevation was not visible during the resurvey.