School, Dalmonach Works, Main Street, Bonhill is a Grade B listed building in the West Dunbartonshire local planning authority area, Scotland. First listed on 29 March 1996.
School, Dalmonach Works, Main Street, Bonhill
- WRENN ID
- idle-merlon-elder
- Grade
- B
- Local Planning Authority
- West Dunbartonshire
- Constituency
- West Dunbartonshire MP: Douglas McAllister (Lab)
- Country
- Scotland
- Date first listed
- 29 March 1996
- OS grid reference
- NS 395 799
- Coordinates
- 55.98561, -4.57274
- Source
- Historic Environment Scotland listing
Description
The building is a schoolhouse located at Dalmonach Works on Main Street in Bonhill, dating from around 1835. It is a two-storey, three-bay terraced house with a tower and features Gothic detailing in the schoolroom, which also served as a workshop. The structure is made of droved, squared, and snecked red sandstone rubble, accented with ashlar margins, and has an eaves band.
On the main elevation, the house at numbers 120-122 is symmetrical with two storeys and three bays. It has a curved rubble forestair leading to a modern door at the centre of the first floor, with a blocked fanlight above and flanking windows. The ground floor features a central door under the forestair and flanking windows, which have been replaced with modern windows. To the outer left, there is a rubble-coped enclosure, and a raggle indicates the former presence of a single-storey structure adjoining the gable on the end wall.
Adjoining to the right is the former schoolroom, which is slightly advanced from the main house. It has four pointed arched bays symmetrically arranged, with a fifth pointed arch door to the outer left. The margins are droved, but all windows are now blocked, and there is a boarded door with a blocked fanlight.
The house features modern timber top-hopper windows, while the workshop has blocked windows. The roof is covered with grey slate and has broad industrial brick chimneys with coped apex stacks and octagonal cans. There is a blocked rooflight on the workshop ridge, an octagonal louvred metal ventilation chimney at the centre, and a small red sandstone apex stack on the outer apex.
Local climate
School, Dalmonach Works, Main Street, Bonhill sits in one of the wettest parts of the UK, with an average of 1,620 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.
It experiences an average of 52 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 30 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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