Lock Number 4 on Northampton Arm of Grand Union Canal is a Grade II listed building in the West Northamptonshire local planning authority area, England. First listed on 9 July 1987. Lock.

Lock Number 4 on Northampton Arm of Grand Union Canal

WRENN ID
iron-mortar-poplar
Grade
II
Local Planning Authority
West Northamptonshire
Constituency
South Northamptonshire MP: Sarah Bool (Con)
Country
England
Date first listed
9 July 1987
Type
Lock
Address
Lock Number 4 on Northampton Arm of Grand Union Canal, Rothersthorpe
OS grid reference
SP 724 563
Coordinates
52.20085, -0.94138
Source
Historic England listing

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

Description

Lock Number 4 on the Northampton Arm of the Grand Union Canal is a lock built around 1815, with restorations completed in 1888 and the 20th century. It is constructed of red and blue brick and features metal swing gates. This lock is single-width, with a single upper gate and double lower gates, and includes an overflow channel. It is part of a series of 12 locks on the Northampton Arm of the Grand Union Canal.

Local climate

Lock Number 4 on Northampton Arm of Grand Union Canal 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 83% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 82% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% 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
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  • 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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Nearby listed buildings

  1. Lock Number 5 on Northampton Arm of Grand Union Canal Grade II 93 m
  2. Bridge Number 5 on Northampton Arm of Grand Union Canal Grade II 111 m
  3. Lock Number 3 on Northampton Arm of Grand Union Canal Grade II 132 m
  4. Lock Number 6 on Northampton Arm of Grand Union Canal Grade II 177 m
  5. Lock Number 2 on Northampton Arm of Grand Union Canal Grade II 261 m
  6. Lock Number 7 on Northampton Arm of Grand Union Canal Grade II 271 m
  7. Lock No.8 on Northampton Arm of Grand Union Canal Grade II 350 m
  8. Northampton Top Lock Cottage Grade II 378 m
  9. Lock Number 1 on Northampton Arm of Grand Union Canal Grade II 378 m
  10. Lock Number 9 Grade II 451 m