Foul sewer line running through back garden

[LeaHill]

I'm hoping someone can tell me what the "1750 FOUL SEWER" here means for plot 1 in this sewer line map. Is the "1750" the diameter of the sewer pipe in mm? That seems....large? Will I be able to build a rear extension as this line runs through the back garden?

 

[freddiemercurystwin]

Don't think it will be 1.75m! If your waste connects to that sewer then surely you have have a manhole in your back garden you can lift?

 

[Murdochcat]

If your planned extension goes near or over the drain you’ll need a build over agreement from your local water authority - which won’t be quick or cheap

 

[LeaHill]

I purchased a more detailed sewer line map from the water company (Severn Trent). Apparently the sewer pipe is 1.8 m in diameter, built out of brick and runs through the back garden about 9.2 m away from the rear wall.

Apparently, Severne Trent have a no-build zone within 7.5 metres of a 900 mm or greater diameter sewer line. So we can't do a rear extension. In my eyes this devalues the house and almost makes me want to walk away from purchasing.

 

[securespark]

But it's outside the no build zone, isn't it?

 

[freddiemercurystwin]

Yes but it only gives the OP a maximum extension size of about 1.5m. That said sewer maps are notoriously inaccurate sometimes by many metres so it might be worth investigating further exactly where and how deep the sewer is, it may be much further away, or closer of course. So some investigation work (talking to neighbours/drain survey etc) is necessary if you want to make an informed decision or otherwise walk away. The house is what it is, it doesn't devalue it. It sucks though but that's the rubbish house buying process we have, why we don't have a sellers pack that includes all this before you get invested in a purchase is beyond me.