The Undercroft at 72/74 High Street in Guildford in Surrey is a medieval undercroft or storage room. It has been described as one of the finest examples of its type in the country.^[1][2] Since 1976 it has been a Grade II* listed building and Scheduled Monument on the List of Historic England.^[3]

The Undercroft, Guildford
Print showing the Undercroft as it appeared in the 18th-century
Type	Undercroft
Location	72/74 High Street, Guildford, Surrey
Coordinates	51°14′07″N 0°34′25″W / 51.23528°N 0.57361°W / 51.23528; -0.57361
OS grid reference	SU 99676 49427
Built	13th century
Scheduled monument
Official name	Medieval undercroft at 72/74 High Street
Designated	27 August 1976
Reference no.	1005924
Listed Building – Grade II*
Official name	72, 74, 76 and 78, High Street
Designated	1 May 1953
Reference no.	1180242
Location of The Undercroft, Guildford in Surrey

Generally, a medieval undercroft was built with at least three vaulted bays depending on the wealth or storage needs of the owner. Built of stone and therefore fireproof,^[2] an undercroft would have been used for storing foodstuffs or liquids such as barrels of wine or items of value. When built under a house an undercroft and, more importantly its contents, could be watched at all times. While undercrofts are on occasion called 'cellars' they were not exclusively built completely below ground level; the fact of being built into the ground often resulted in their being preserved when the building above was no longer used or when another building was erected in its place. There are the remains of about another half a dozen medieval undercrofts in Guildford. Being constructed of masonry they were costly to build and only could have been afforded by rich merchants which reveals that Guildford was a wealthy town during the Middle Ages.^[1][3]

The Undercroft at Guildford is late 13th-century in date and is believed to have belonged to the house of a merchant above it who dealt in wine or expensive cloths or silk. The Undercroft is three bays in length and measures about 30 feet long by 19 feet wide and 9 feet high (about 10 m by 6 m and 3 m high) and has a rib vaulted ceiling supported by two round central columns or piers. The corbels on the walls are carved with grotesque faces and support the base of the arches. That near the steps shows the head of a woman wearing a wimple which was fashionable women's headwear in the late 13th century. The Undercroft's ceiling is actually above street level which gives ample room for the doorway and the steps leading down from the High Street outside, such access suggesting the Undercroft was originally built as a shop.^[2] The doorway being positioned on the downhill side provided maximum headroom while on the room's uphill side a low window was located which provided some daylight. By the far corner in the uphill wall a narrow doorway can be found which led to a spiral staircase to the house above which supports the theory that the Undercroft was originally built as a shop. Of this timber framed structure above nothing now remains.^[1][3] The extant three-storey red brick building above the Undercroft dates to 1803. The Undercroft included a doorway in the south wall which was blocked and replaced sometime in the 19th century.^[3]

From the 14th century the Undercroft was largely used for storage, but for much of the 20th century it stood empty until 1989 when the blocked street entrance was reopened and the room renovated for use as an Information Centre for visitors to Guildford. The Information Centre has recently been relocated.^[1]

The Undercroft is managed by the nearby Guildford Museum and is open on Wednesdays from May to September – 2pm to 4pm October to April and Saturdays from May to September – 12pm to 4pm. Admission is free. There are steps from the street level and there is no disabled access.