Thornton House is a Grade II listed building in the Breckland local planning authority area, England. First listed on 17 January 1973. House. 3 related planning applications.
Thornton House
- WRENN ID
- ancient-quartz-marsh
- Grade
- II
- Local Planning Authority
- Breckland
- Constituency
- South West Norfolk MP: Terry Jermy (Lab)
- Country
- England
- Date first listed
- 17 January 1973
- Type
- House
- Address
- Thornton House, 17, London Street, Swaffham, PE37 7DD
- OS grid reference
- TF 820 087
- Coordinates
- 52.64603, 0.68918
- Source
- Historic England listing
Description
Thornton House is a mid-18th century house located on London Street in Swaffham. It was later divided into offices in the mid-20th century. The house is constructed of red brick laid in a Flemish bond pattern, with a pantiled roof.
The exterior presents a two-storey, five-window facade. The central entrance features a six-panelled door with a three-paned overlight, set within a timber doorcase which has consoles supporting an open pedimented hood. The windows are 6/6 sash windows with gauged skewback arches; secondary glazing has been added externally. A dentil eaves cornice runs along the top of the building. The gabled roof includes internal gable-end stacks, and some tumbling is visible in the gable heads. A two-storey outshut is located at the rear.
The interior has been adapted for office use, but retains a staircase with two turned balusters per tread, a ramped and moulded handrail.
Local climate
Thornton House sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 82% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 94% of listed buildings.
It experiences an average of 29 freeze-thaw cycles a year, fewer than 68% of listed buildings. Of these, 15 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.
- Sale history — 6 transactions since 2018
- Related listed building consents — 3 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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