18 and 20, High Street is a Grade II listed building in the North Hertfordshire local planning authority area, England. First listed on 14 June 1964. House. 1 related planning application.
18 and 20, High Street
- WRENN ID
- knotted-span-yew
- Grade
- II
- Local Planning Authority
- North Hertfordshire
- Constituency
- North East Hertfordshire MP: Chris Hinchliff (Lab)
- Country
- England
- Date first listed
- 14 June 1964
- Type
- House
- Address
- 18 and 20, High Street, Royston, SG8 9AG
- OS grid reference
- TL 356 406
- Coordinates
- 52.04766, -0.02368
- Source
- Historic England listing
Description
This is an altered 17th-century house, located on the east side of High Street. The front of the building was altered in the 19th century. The exterior is whitewashed pebbledash with an old tiled roof featuring sprocketed eaves. It is two storeys high. The left and centre sections have altered 19th-century shop fronts, and the right side features a segmental bow shop window with glazing bars. The timber frame is exposed on the first floor, displaying four flush windows with glazing bars. Nos 18 and 20 form a group with Nos 2 to 32 (even), No 26A, and Nos 1 and 2 John Street.
Local climate
18 and 20, High Street 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 92% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 78% of listed buildings.
It experiences an average of 35 freeze-thaw cycles a year, more than 59% 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 2 transactions since 2020
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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