Castle Priory College is a Grade II* listed building in the South Oxfordshire local planning authority area, England. First listed on 9 December 1949. College. 8 related planning applications.
Castle Priory College
- WRENN ID
- lesser-parapet-raven
- Grade
- II*
- Local Planning Authority
- South Oxfordshire
- Constituency
- Didcot and Wantage MP: Olly Glover (LD)
- Country
- England
- Date first listed
- 9 December 1949
- Type
- College
- Address
- Castle Priory College, Thames Street, Wallingford, OX10 0HD
- OS grid reference
- SU 608 892
- Coordinates
- 51.599, -1.12218
- Source
- Historic England listing
Description
Castle Priory College is a house, now a college, likely with an early 18th-century core that was encased and remodelled around 1760, with alterations in the 19th and 20th centuries. The house is built of rendered brick on brick, with a Welsh slate hipped roof and rendered brick stacks to the centre block. It follows a double-depth plan, presenting a three-storey, five-window central range flanked by subsidiary wings. The main entrance features a six-panel door with a Doric pillared surround, set within a glazed porch topped with a lead ogee-shaped roof. The ground and first floors have 12-pane unhorned sash windows; the first-floor windows are accentuated by cornices and louvred shutters. A flat rendered band separates the first and second floors, above which are further 12-pane unhorned sash windows with shutters. A dentil cornice runs along the eaves. The single-storey wing to the left has two 12-pane unhorned sash windows, while the two-storey wing to the right features three first-floor windows with 6-pane horned sashes.
The rear elevation has a three-storey, five-window centre block, with the central three bays projecting. Glazed double doors with overlights provide access through round-arched doorways on either side, with three unhorned 12-pane sashes centrally placed. The first floor has 12-pane unhorned sash windows with cornices and louvred shutters, and the second floor contains similar windows, also with cornices and shutters. A single-storey wing to the right incorporates a tripartite sash window, and a single-storey, three-window wing to the left features central French windows, flanked by 12-pane sash windows.
Inside, a dog-leg staircase with a wood baluster balustrade rises from the ground to the first floor, located to the left of the main block. The dining room on the ground floor right showcases a Rococo plaster ceiling with a late 19th-century Venetian-style painting depicting a female figure dispensing flowers from a basket held by putti. Numerous 18th-century fireplaces are present, some in the Adam style, including a Rococo painted wood fireplace at the rear centre. Several first-floor rooms feature ovolo moulded panelling, and the second-floor landing has incised plaster decorative bands forming panels, along with an 18th-century curved-fronted cupboard with a metal-lined basin in the corner. A detached service wing, originally built around the early 18th century, is positioned at a right angle to the rear right, constructed of red brick with an old plain-tile half-hipped roof, brick ridge stacks, and five hipped dormers. This wing is single-storey with an attic and features three windows, with 20th-century French windows centrally placed and 12-pane sashes to the sides, all framed by wooden architrave surrounds and cornices, topped with a dentil cornice.
The property was the home of Sir William Blackstone (1723-80), author of "Commentaries on the Laws of England," and later the home of the Haylar family in the mid-19th century.
Local climate
Castle Priory College 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 75% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 65% 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
- No sale records on file
- Related listed building consents — 8 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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