Shell House is a Grade II* listed building in the Uttlesford local planning authority area, England. First listed on 8 August 1985. Garden house, folly. 1 related planning application.

Shell House

WRENN ID
lesser-plinth-sedge
Grade
II*
Local Planning Authority
Uttlesford
Constituency
Harlow MP: Chris Vince (Lab)
Country
England
Date first listed
8 August 1985
Type
Garden house, folly
Address
Shell House, Hatfield Broad Oak, CM22 6NF
OS grid reference
TL 540 198
Coordinates
51.85564, 0.23511
Source
Historic England listing

Also on this page: related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Shell House is a garden house or folly built around 1757 by the Houblon family. It is made from knapped and boulder flints, shells, glass fragments, and brickwork, topped with a low-pitched pantile pediment gabled roof. The original structure is a small rectangular pavilion with pedimented gables at both the front and rear. The rear was extended to the west in red brick during the 19th century.

The west front features a central semi-circular arched entrance flanked by two small flat-headed windows, all adorned with rustication and keystones that create a Serliana motif. The windows and the original door, which has fan pattern glazing in its head, contain small panes. The entrance is approached by two semi-circular stone steps, and the keystone above the door showcases an eagle-like bird with outstretched wings crafted from white shells. The pediment includes a semi-circular dummy window with radiating glazing bars made from contrasting materials. The corners of the building are accentuated with rusticated quoins of flint boulders, and each side displays a star pattern of shells radiating from a central blue glass sphere.

Inside, the house features mid-18th century wall panelling and a coved plaster ceiling, decorated with a border and motifs of shells and glass fragments, including a star design and corner quadrants with central rosettes. Attached to either side are later single-storey blocks made of red bricks with pantile roofs, each featuring three tall chimney stacks at the rear, which are of limited interest. Shell House is designated as Grade II* due to its rarity.

Local climate

Shell House sits in one of the driest parts of the UK, with an average of 700 mm of rain a year. This makes it drier than 91% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 86% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 55% of listed buildings. Of these, 17 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 — 1 application
  • 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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