Penlan Lodge, including railings and gate

Penlan Lodge is a small one-storey building with an attic, designed in a T-plan and featuring a large porch. Constructed from stone, it has a slate roof adorned with diamond-shaped slates and a central chimney with two diamond stacks. The porch on the southeast elevation is gabled and includes ornately carved cusped bargeboards, along with a three-centred headed arch made of dressed stone and a dripstone. There is a small lancet window in the southern wall of the porch.

The south gable end has a casement window above, which consists of two four-centred headed lights with a dripstone, and a two-light transomed window below. To the right, there is another casement window with two four-centred headed lights set in a stop-chamfered architrave, also with a dripstone. The northeast gable features a lancet window with a dripstone above and a transomed window below that has three four-centred headed lights with a dripstone.

In front of the lodge, there are iron railings and a gate. The railings consist of iron posts with vertical rails, while the cast-iron gatepiers and gate are designed to match the railings.