Moving Manhole for Side and Rear extension

[Indy121]

Hi all,

Need some advice on a potential side and rear extension I am thinking of doing in the future.

The main problem I have is there is a manhole which will need to be moved, however as it is on a 90 degree bend, I’m unsure of my options... looking at the provider - Thames Water - I have no chance of building over with a double sealed cover.

I have attached some pics showing the run of the sewer - I would want to extend back and to the side for an ‘L’ extension.

There is a manhole in the back and another in the front garden. None of these showed on the surveys which were carried out before I brought the property & both were covered in the gardens meaning I missed them.

What would be my best option?

Thanks for any help!

 

[freddiemercurystwin]

Is the sewer shared or private?

 

[Indy121]

Is the sewer shared or private?

I’m guessing shared as it’s coming from the right, which is my neighbours property, I’m in a semi detached house.

None of this was shown on the maps when the survey was done.

 

[freddiemercurystwin]

Forget about any maps, surveys or records they are all notoriously inaccurate and cannot be relied upon.

 

[Indy121]

Forget about any maps, surveys or records they are all notoriously inaccurate and cannot be relied upon.

Yeah, I’ve come to that conclusion from some google searches!

Any ideas on if the manhole will be ok to be moved? Or will this restrict any potential extensions in that particular area?

 

[Footsoldier888]

Given you have a bathroom in the front I take it then I would guess the front garden is yours and possibly next doors whereas the back one may be other houses and just crosses your land, especially if it is the deep one. I had a house the same, with the back garden one going out to a different road.

If this is the situation it can be moved but it is hefty money to do so.

The first stage is to establish if this back drain is servicing other properties ie belongs to the water co.

 

[Indy121]

Given you have a bathroom in the front I take it then I would guess the front garden is yours and possibly next doors whereas the back one may be other houses and just crosses your land, especially if it is the deep one. I had a house the same, with the back garden one going out to a different road.

If this is the situation it can be moved but it is hefty money to do so.

The first stage is to establish if this back drain is servicing other properties ie belongs to the water co.

My bathroom is above my kitchen...

The one in the back is definitely mine, as I see water running through when I flush the toilet etc. Just not sure how many of the houses to the right it also services.

You can see the pipe then bending as it goes down the side of my house to another manhole which is in my front garden.

 

[Footsoldier888]

Unfortunatley it will be the property of the water company if it is a shared sewer. If you google "drainage lift and shift" you should be able to get more info about if it is possible and the likely cost.

Must admit it doesn't look too good on the face of it.