The Gelli is a small country house situated between Tallarn Green and Tybroughton in Wrexham County Borough, Wales.

[2] It is constructed mainly in brick, with red sandstone and terracotta dressings, and with some timber framing in the upper storey.

The upper storey is jettied and timber-framed and its tie beam includes a painted panel inscribed "G and H K 1877".

The third range projects forward at the south end; it is in one storey, and comprises the coach house, stables and accommodation for the groom.

[1] In its listing, it is described as "a very well preserved small country house in the Domestic Revival style characteristic of John Douglas, combining originality of planning and a rich vocabulary of detail in a striking picturesque composition.