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Guidance regarding building near water mains


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Buildings are not permitted near or over South West Water's water infrastructure, please refer to this section for the confirmation of easements required.

You are not permitted to build within three metres of a public water main and this distance may increase where necessary to protect South West Water's main as stated in the table below. South West Water must have unrestricted access to repair, maintain or renew the main as required.

If you propose to build closer to the water mains than the stated criteria you will be expected to pay for the water main to be diverted.

Diameter of water mainEasement
<= 150mm (6")6 metres (3 metres either side of the water main)
151mm to 600mm (^2 to 24")7 metres (3.5 metres either side of the water main)
>= 601mm (>=24")9 metres (4.5 metres either side of the water main)

Note: these easements are from the outside barrel of the water main




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