Lock 38 Grand Union Canal is a Grade II listed building in the Buckinghamshire local planning authority area, England. First listed on 15 October 1984. Canal lock.

Lock 38 Grand Union Canal

WRENN ID
bitter-moulding-myrtle
Grade
II
Local Planning Authority
Buckinghamshire
Constituency
Aylesbury MP: Laura Kyrke-Smith (Lab)
Country
England
Date first listed
15 October 1984
Type
Canal lock
Address
Lock 38 Grand Union Canal, Marsworth
OS grid reference
SP 923 152
Coordinates
51.8283, -0.66087
Source
Historic England listing

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

Description

Lock 38 on the Grand Union Canal is a canal lock built around 1800, with some alterations made later. It features brick retaining walls topped with stone coping. The lock has pairs of gates equipped with sluices and winding gear, along with quoins that are dated 1862 and 1885. At the northeast end, there are brick steps, and four cast iron bollards are present. Additionally, there are two side ponds with sluices and winding gear that date from 1886.

Local climate

Lock 38 Grand Union Canal sits in a drier-than-average part of the UK, with an average of 740 mm of rain a year. This makes it drier than 76% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 81% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 69% 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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  • 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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