Conduit House is a Grade II listed building in the Southampton local planning authority area, England. First listed on 14 July 1953. Conduit house. 1 related planning application.

Conduit House

WRENN ID
unlit-vault-root
Grade
II
Local Planning Authority
Southampton
Constituency
Southampton Itchen MP: Darren Paffey (Lab)
Country
England
Date first listed
14 July 1953
Type
Conduit house
Address
Conduit House, Commercial Road, City of Southampton, SO15 1GD
OS grid reference
SU 415 123
Coordinates
50.90901, -1.40994
Source
Historic England listing

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

Description

Conduit House is an early 14th century structure that served as a conduit house, collecting water from wells and springs for the public water supply in Southampton. The collection of water began around 1290 by the Franciscan Friars, and the system was handed over to the town council in 1420. This building is one of the earliest known examples of a municipally controlled water supply on such a scale. It is a single-storey stone building featuring a stone pitched roof and has one blocked slit window. The doorcase is adorned with a shouldered lintel. Conduit House is also scheduled as an ancient monument.

Local climate

Conduit House receives an average of 830 mm of rain a year. This makes it wetter than 53% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.

It experiences an average of 18 freeze-thaw cycles a year, fewer than 82% of listed buildings. Of these, 7 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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  • 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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