Flat room and neighbours concern about drainage

[Nettleingham]

We are having a rear extension built professionally, it is a two storey rear extension but as we are semi-detached it is single storey on the side that connect to our neighbours property. This area has gone in as a flat roof, with appropriate slope for water drainage. The slope (designed by an architect, structural engineers and submitted through planning) is directed towards their property as we have a pitched roof at the end of the property and there would not be enough height to run the slope to the back of our property and keep the roof below the window line / angle from their window.

To mitigate any water drainage running off the new flat roof there will be a drain attached to this on our side of the property line and this will run off into our drains and through our new soak away.

My neighbour has raised a concern about water drainage onto their property as their roof is lower than our new one and they experience some water leakage already in their property in heavy rain and do not want added water.

I appreciate this and have checked with the builders who have assured me that no water would be drained into their property as there is suitable mitigation in place through the drain.

Other than the drain failing - which comes down to our appropriate property maintenance - I cannot see that we will be causing excess water to fall on next doors property.

For added context the plans were submitted as designed 3 years ago and approved with no objections. We have had a good relationship with our neighbours and we actually brought the property from them. We discussed the work we wanted to do pre-purchase 5+ years ago and showed them the plans for their comment pre-finalisation and submitting to planing. We have checked in with them about any concerns throughout the build and this was raised by them once and we followed this up with the builder and established a drain would prevent water flow.
They have raised this with us again and said we have broken trust with them and will be causing issues to their property as a result of faulty design.

Our roofer has also noted their the pitch of the next door extension is incorrect and lead on their side is failing and needs replacing. He offered to put on a temporary fix (which we would pay for) for them until they can get their lead done but next door declined.

Builders and roofer has assured me this is a non-issue, however I wanted to see if there were any other opinion in a wider forum.

 

[Koolpc]

Seems like you have done everything you can...

 

[noseall]

We are having a rear extension built professionally, it is a two storey rear extension but as we are semi-detached it is single storey on the side that connect to our neighbours property. This area has gone in as a flat roof, with appropriate slope for water drainage. The slope (designed by an architect, structural engineers and submitted through planning) is directed towards their property as we have a pitched roof at the end of the property and there would not be enough height to run the slope to the back of our property and keep the roof below the window line / angle from their window.

To mitigate any water drainage running off the new flat roof there will be a drain attached to this on our side of the property line and this will run off into our drains and through our new soak away.

My neighbour has raised a concern about water drainage onto their property as their roof is lower than our new one and they experience some water leakage already in their property in heavy rain and do not want added water.

I appreciate this and have checked with the builders who have assured me that no water would be drained into their property as there is suitable mitigation in place through the drain.

Other than the drain failing - which comes down to our appropriate property maintenance - I cannot see that we will be causing excess water to fall on next doors property.

For added context the plans were submitted as designed 3 years ago and approved with no objections. We have had a good relationship with our neighbours and we actually brought the property from them. We discussed the work we wanted to do pre-purchase 5+ years ago and showed them the plans for their comment pre-finalisation and submitting to planing. We have checked in with them about any concerns throughout the build and this was raised by them once and we followed this up with the builder and established a drain would prevent water flow.
They have raised this with us again and said we have broken trust with them and will be causing issues to their property as a result of faulty design.

Our roofer has also noted their the pitch of the next door extension is incorrect and lead on their side is failing and needs replacing. He offered to put on a temporary fix (which we would pay for) for them until they can get their lead done but next door declined.

Builders and roofer has assured me this is a non-issue, however I wanted to see if there were any other opinion in a wider forum.

I can't see the design or the drawing or your neighbours existing roof, so can't comment.

 

[catlad]

Without pictures it's impossible to comment.

 

[Murdochcat]

Do you have a PWA in place?

 

[Nettleingham]

Do you have a PWA in place?

We sent the notice as required. However there was no dispute and the neighbours acknowledge the work so it was a simple one.
The PWA does not impact this as the roof and drainage finish on our side and although build up to the party wall everything is on our side of the boundary and on our wall and roof as we have built an additional wall inside the party wall that our roof sits on.

 

[Ivor Windybottom]

You brought the property from them? Was it on wheels?

Bought vs Brought | Difference, Definition & Examples

The two verbs bought and brought are spelled and pronounced almost identically, and they are both the past tenses of irregular verbs. However, they are

quillbot.com

I don't understand how the gutter, downpipes and drains could be all on your side of the boundary AND give them concerns about pouring onto them. I suspect the gutter overhangs the boundary, in which case you have a major re-work to pay for, possibly moving the wall. But it's impossible to tell without photos.

Neighbour’s Gutter Overhangs My Property. What Can I Do About It? | Lawhive

Is a neighbor’s gutter overhanging your property? This article covers everything you need to know about taking action over this kind of boundary dispute.

lawhive.co.uk

 

[Nettleingham]

You brought the property from them? Was it on wheels?

Bought vs Brought | Difference, Definition & Examples

The two verbs bought and brought are spelled and pronounced almost identically, and they are both the past tenses of irregular verbs. However, they are

quillbot.com

I don't understand how the gutter, downpipes and drains could be all on your side of the boundary AND give them concerns about pouring onto them. I suspect the gutter overhangs the boundary, in which case you have a major re-work to pay for, possibly moving the wall. But it's impossible to tell without photos.

Neighbour’s Gutter Overhangs My Property. What Can I Do About It? | Lawhive

Is a neighbor’s gutter overhanging your property? This article covers everything you need to know about taking action over this kind of boundary dispute.

lawhive.co.uk

I don’t have a photo of the gutter yet as the roof work is still in progress and not finished.

It is all on our side they just believe the gutter will fail. We have not built past our boundary and was very careful about doing so as part of the design.

 

[Ivor Windybottom]

But will the gutter be on your side of the boundary? It probably won't if you're building up to the boundary and the pitch is towards them. This is often done but it isn't allowed.

If so they have a complaint about the water flowing their way and also you may be trespassing onto their property, which they are likely to find out about if they start pursuing the matter.

 

[Nettleingham]

But will the gutter be on your side of the boundary? It probably won't if you're building up to the boundary and the pitch is towards them. This is often done but it isn't allowed.

If so they have a complaint about the water flowing their way and also you may be trespassing onto their property, which they are likely to find out about if they start pursuing the matter.

We are not building over their side. The gutter will be on our side of the boundary as the wall it is secured on sits inside the party wall and therefore is on our side.

 

[Ivor Windybottom]

Could they build the mirror of what you're building on their side of the boundary? i.e. would there then be two gutters, one on each side of the invisible boundary line?

Or would the two bump into or overlap each other?

 

[Nettleingham]

Could they build the mirror of what you're building on their side of the boundary? i.e. would there then be two gutters, one on each side of the invisible boundary line?

Or would the two bump into or overlap each other?

They could build a mirror.