Millhouse, Walls, Hoy is a Grade C listed building in the Orkney Islands local planning authority area, Scotland. First listed on 31 January 2002. House. 2 related planning applications.
Millhouse, Walls, Hoy
- WRENN ID
- hidden-wall-claret
- Grade
- C
- Local Planning Authority
- Orkney Islands
- Constituency
- Orkney and Shetland MP: Mr Alistair Carmichael (LD)
- Country
- Scotland
- Date first listed
- 31 January 2002
- Type
- House
- OS grid reference
- ND 301 955
- Coordinates
- 58.84171, -3.21151
- Source
- Historic Environment Scotland listing
Description
Millhouse is a mid-19th century, two-storey, three-bay rectangular-plan house with later additions. It features a slightly narrower single-storey addition from the 20th century on the northeast side. The design is symmetrical with regularly spaced openings. The main block is constructed of coursed rubble, while the addition is timber clad in asphalt. The main block has coped gables.
On the southeast elevation, a late 20th century glazed rectangular-plan lean-to porch or conservatory projects from the central entrance, with entrances on either side of the main block. The entrance is set back and features a part-glazed replacement timber door. There are flanking windows on each floor and one above. The 20th century addition is slightly set back to the right and has three windows.
The northwest elevation has a small central window on each floor of the main block, with an inserted window to the left on the ground floor. The 20th century addition is slightly set back to the left and has a central entrance with flanking windows.
On the southwest elevation, there is a window to the left of the gable end of the main block. The northeast elevation shows the gable end of the 20th century addition projecting against the gable end of the main block, which is blank.
The main block features a combination of 4-pane timber casements and 4-pane timber sash and case windows. The roof of the main block is covered with asbestos slate, while the 20th century addition has a corrugated metal roof. There are gablehead stacks with band courses on either side of the main block, topped with round cans.
Local climate
Millhouse, Walls, Hoy sits in a wetter-than-average part of the UK, with an average of 1,140 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.
It experiences an average of 3 freeze-thaw cycles a year, fewer than 98% of listed buildings. Of these, 3 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 2 applications
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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