According to submitted information, there was a scheme of Ralph Knight's in the middle of the 18th century to build a country house and park on the Yorkshire-Nottinghamshire border close to the village of Firbeck, but he died in 1768 and nothing came of the plan. In 1818 the idea was revived by Henry Knight and the foundations of the new Langold Hall were laid, but that idea also came to nothing, although the lake for the intended park was excavated to the south-east, using a series of four existing ponds. A weir was constructed in the 1890s between the north lake and the west lake including what appears to be a bridge with a single arch, which is popularly called either the 'boathouse' or the 'icehouse', and at some point before the lake was silted and vegetation grew, its use as a boathouse was possible. It is shown as such on the 1888 Ordnance Survey map.

The so-called boathouse is in the form of an elliptical brick arch with straight lower walls back-filled with earth and given a limestone ashlar façade extending as a screen to the east and west. The masonry on the west side changes from dressed ashlar to rough-cut blocks. There is no north side to the structure or any form of permanent parapet, and the surface of the path is rammed earth. In 1898 a footpath connected the weir with Langold Farmhouse. The interior takes the form of a barrel-vaulted chamber running north for five metres to a blank brick wall.
The boathouse at Langold Country Park is not recommended for designation, for the following principal reasons:
*Architectural Interest: the boathouse is simple in design and execution and lacks the necessary architectural elaboration for a building of this form and date.
* Group Value: the boathouse stands in isolation and is not an essential element in an important landscape. (1)

Historic England, 2021, National Record of Historic Environment (Digital archive). SNT5271.

<1> Bill Wilson, 2009, English Heritage Listing File (Unpublished document). SNT6514.