Lock Number 4 is a Grade II listed building in the Dacorum local planning authority area, England. First listed on 18 July 1990. Canal lock. 5 related planning applications.
Lock Number 4
- WRENN ID
- nether-plaster-sorrel
- Grade
- II
- Local Planning Authority
- Dacorum
- Constituency
- Harpenden and Berkhamsted MP: Victoria Collins (LD)
- Country
- England
- Date first listed
- 18 July 1990
- Type
- Canal lock
- Address
- Lock Number 4, Grand Union Canal, Tring Rural
- OS grid reference
- SP 914 145
- Coordinates
- 51.82185, -0.67489
- Source
- Historic England listing
Description
Lock Number 4 is a canal lock located on the Aylesbury Arm of the Grand Union Canal, built between 1811 and 1813 with later alterations. It was engineered by Henry Provis for the Grand Junction Canal Company. The structure is made of brick, featuring granite quoins and coping, along with some brick coping. This narrow lock is designed to accommodate a single narrowboat and has a single gate at the east end, which is hinged on the north side, and a double gate at the west end. It includes paddles and winding gear. The lock has datestones from 1853 and 1864, with the east gate dated 1985. The entrances are lined with brick.
Local climate
Lock Number 4 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 3 transactions since 1999
- Related listed building consents — 5 applications
- 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.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
- 1 Locks 1 and 2 Grand Union Canal Aylesbury Arm
- 2 Grand Union Canal Aylesbury Arm Bridge Number 3 (Wilstone Bridge) and Lock Number 8 Adjoining on East
- 3 Grand Union Canal Aylesbury Arm Bridge Number 11
- 4 Grand Union Canal Aylesbury Arm Bridge Number 10
- 5 Grand Union Canal Aylesbury Arm Bridge Number 6 Near Wilstone at National Grid Reference Sp 8990 1427
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