Moving a manhole

[timpharrison]

Hi,

I'm looking at buying a 1930s property in South London, in which I would want to extend the kitchen. There is already a half-width extension in place. I suspect the main reason they did a half-width rather than full-width extension was to keep the volume under 70m3 to fall under Permitted Development rules (applicable prior to 2008). This no longer applies, so I do not envisage planning issues extending to full-width.

However there may be another reason the current owners chose not to extend the full width of the property - there is a public sewer manhole cover slap in the middle of were the full-width extension would go.

I've spoken to Thames Water and they say I will have to get this moved. They explained the process and they made it sound like this was not a big deal.

Does anyone have an idea of what additional cost this may add to building my extension? A grand, couple of grand, more?? If the cost is material I would want to pass this on to the vendor.

Cheers
Tim

 

[Fluffster]

It all depends on so many variables, access for machinery and waste disposal, size of sewer pipe and connections required, if full access chamber is required or an inspection cover. If it was completed the same time as the footings for extension this would be more economical.

Pete

 

[Agile]

Which properties does it serve?

Are you sure its public?

Tony

 

[Hugh Jaleak]

As said too many variables to even guess, also bear in mind if the sewer runs under any part of your proposed build, necessary steps will need to be taken to protect it.

It's Thames Water's sewer and they can insist on works that must be carried out to protect their asset.

 

[Agile]

Hi,

Does anyone have an idea of what additional cost this may add to building my extension? A grand, couple of grand, more?? If the cost is material I would want to pass this on to the vendor.

Cheers

Tim

I don't understand the logic of expecting the vendor to pay towards your extension proposals.

We are waiting your replies to questions asked.

You might have to divert the drain outside the envelope of your building line if it serves other properties and is classed as a public sewer.

Tony