Architectural services

Do I need a build over agreement for a lean to?

Anonymous user 28/02/2024 - 3.41 PM

Hi, we have a mains sewer pipe between us and next door and the water company have said we cannot build anything with foundations within 3 metres either side. Rather than a proper extension, I wondered if I could build a lean to so the foundation (as such) would only be 1 or 2 bricks deep. Our builder has suggested we have a timber frame between the fence line and house, cladding on the walls and a concrete floor to bring the height level with the existing building. Would I need a build over agreement for this? It's the concrete floor which is leaning me towards needing an agreement. I'm not too concerned if they ever need to dig it up but more concerned about issues when we sell up in the future. Thanks

London Architecture Ltd

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Petersfield

Building anything within 3m of a public sewer would need a buildover agreement, regardless of the construction method. It should simply be a case of designing the foundation so that there is no additional load placed on the sewer, and a structural engineer should be able to prepare the relevant drawings for the agreement.

Answered4 December 2018

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Cadvis3d Limited

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Huddersfield

build it all in timber, with timber framed walls, floor and use small foundations in each corner. But you will still need a build over agreement for a mains public sewer and it can be very difficult (or impossible) to get agreed. You could have a timber outbuilding, as this would be a light temporary structure and then build an extension on the rear of the house or the opposite side (if possible). Failing that there isn't much more you can do....

Answered14 December 2018

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