Great Porch House is a Grade II* listed building in the Wiltshire local planning authority area, England. First listed on 9 April 1954. House.
Great Porch House
- WRENN ID
- crumbling-rood-blackthorn
- Grade
- II*
- Local Planning Authority
- Wiltshire
- Constituency
- Melksham and Devizes MP: Brian Mathew (LD)
- Country
- England
- Date first listed
- 9 April 1954
- Type
- House
- Address
- Great Porch House, 8, Monday Market Street, Devizes
- OS grid reference
- SU 006 615
- Coordinates
- 51.35278, -1.99246
- Source
- Historic England listing
Description
Great Porch House, located at 8 Monday Market Street, is an early 15th-century building that was originally part of a larger property extending to a courtyard at the back. The former wings at the rear were demolished in 1954. The house has two storeys and a timber frame, with a 19th-century brick front for Nos 6 and 7. The gable of No 8 features bargeboards, and the first floor displays joist ends from a former overhang along with medieval exposed timber framing, which includes slightly curved bracing in the gable. Each floor has one sash window with intact glazing bars, and there is a small three-light wooden frame window with cusped lights on the first floor, alongside later brick infilling and a plain door.
Between Nos 7 and 8, there is an archway leading to the Great Porch, which has a moulded beam above and carved flowers. The gabled rear elevation of No 6 shows exposed timber framing. The building features an impressive arch-braced roof framework with massive collar beams and curved wind braces that remain intact throughout. Four of the original six carved heads decorating the wall plates are still present, though one is damaged. Between the roof timbers, there are paintings on plaster, divided into eight sections, each featuring three large crudely painted roses surrounded by green leaves. The ground floor front room of No 8 has panelling, and the building may have ecclesiastical origins. Nos 6 to 15 on the street form a group.
Local climate
Great Porch House receives an average of 820 mm of rain a year. This makes it wetter than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 56% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 16 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
- Sale history — 1 transaction since 1996
- 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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