Advice re rear extension

riclad

I was thinking of building an extension 20ft high x 14ft wide in the back garden.The back wall has 4 windows , surrounded by wood panels on a wood frame .
So i,d put up a new wall 10ft from the old wall, remove the old wall,
Put on a new slate roof and build up to the new wall .This would give a larger kitchen and bedroom upstairs .
Eg the new extension would consist of 2 new rooms ,
one on top of the other.
The problem i see is there is a metal pipe about 8ft from the old wall.
Its 5 inches from the side wall.
Its over 22ft high .Its not a drain pipe .It has a round metal cone on the top.
Would i be allowed to build around this pipe ,or else just leave a 7 inch gap at the side of the new extension where the pipe is .
The pipe looks like a sewer vent pipe.
Can i build around it or will i just leave an 8 inch gap on the side
where the pipe is. The pipe is close to the neighbours side wall.
The side wall is about 27 foot high.
EG the side wall is the side of the neighbouring house.
The extension would not be visible to any neighbour,
unless he was to stand on a 12ft ladder at the end of his garden .

Gumbo

Any pics?
Your aware that planning is required yeah?

riclad

I,ll Post pics this evening of the pipe.
It,s identical to pipes on old buildings i looked at on google image search.using search term old sewer vent pipe.
eg https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRxAOcGlQJTijx77v8AdnCDsebFsWSuDTB4XiOJkQv4mibDP3Qd

its close to boundary wall ,about 8 foot from the rear wall .
Yes ,ill be applying for planning permission .
I can just a leave a gap on one side 8 inch,s wide, for the pipe ,
or i could build around it if i get permission to do so.
The building is 150 years old,
modern vent pipes would be simply placed a few inch,s from the rear wall ,
or go through the attic, and out through the main roof.

There is an old outside bathroom at the rear of the yard.
So it might be connected to that too , through an underground pipe.

Calahonda52

does your proposed extension involve building over any sewer pipes?

riclad

I do not know if theres a sewer pipe in that area ,
so i cant answer that question.
I,ll have to look around more ,
theres weeds in that area i need to remove before i do anything else.
I intend to knock down the old bathroom ,
its about 12 ft from the point where the new extension would end.
The old bathroom is 7x 4ft approx ,beside the back wall , in the corner.
I,ll post photos here later ,after 9pm.

riclad

I looked at that pipe closely,
the top 10 ft goes straight up, 5 ft over roof level.
10 ft down theres a junction point where its joined by the sewer pipe from the bathroom,

Then it goes straight down to ground level, where theres a sewer pipe which goes straight along the side of the boundary wall .So the top 10 ft of the pipe is a vent pipe , to release air,
from the sewer .
EG the lower pipe goes straight under the kitchen floor .

riclad

Heres a photo of the pipe

riclad

I think i,ll have to leave a gap of 10 inches on one side of the extension to allow space for the pipe on the wall, and the pipe going from the bathroom to the middle of the pipe.

riclad

Heres another photo of the lower part of the pipe

tradesman

I think it would be best to replace / re route that pipe if possible.

Calahonda52

tradesman wrote: »

I think it would be best to replace / re route that pipe if possible.

OP: can you post some sort of a sketch , on plan of where all this stuff is and how it relates to your proposed extension: its hard to follow to be honest

riclad

Yes, ill post a sketch later.
basically i intend to build out a further 8 ft ,
eg just extend the 2 rooms at the rear.
So it,ll be like a square box , 2 rooms of equal size on top of each other.
Each room will have 2 windows ,
the lower room will have a exit door ,
on the other side,
sewer pipe is on the right ,
door will be on the left.
Roof will have a slight upward angle in order to connect up with the existing
old slate roof.

At the moment , there,s an 9 ft gap between the
gable wall on the right ,
and on the left theres the wall which is part of the house,
Inside this square i intend to build the extension,
if i get planning permission .
The gable wall is part of the house next door .
The 2 walls are 21 ft high approx.
The sewer pipe goes up the gable wall as shown in the photo,
and goes up to a height of 26 ft approx.
So each room would be 10ft high approx.
i,d intend to just leave an 8 inch gap on the right to leave space for the existing pipe,s ,
i would not be building over any sewer pipe .

Gumbo

Calahonda52 wrote: »

OP: can you post some sort of a sketch , on plan of where all this stuff is and how it relates to your proposed extension: its hard to follow to be honest

+1

A sketch may not work either. Post a proper photo of the rear elevation. None of this zoomed in stuff where you can’t see anything.

riclad

Heres sketches of the basic plan for the extension,
the last image just shows the present layout,
Before any new building is carried out.
EG A in the last image is the existing rear roof .
Theres no way i can post a photo of something thats is not built yet.

tradesman

Although the sketches are ok, an actual photo of the complete rear from a distance would be very helpful

riclad

I,LL post a photo later,
after 8pm today.

Gumbo

tradesman wrote: »

Although the sketches are ok, an actual photo of the complete rear from a distance would be very helpful

This is what I asked for 5 days ago.

tradesman

kceire wrote: »

This is what I asked for 5 days ago.

They obviously didn't hear you! ☺. As always a picture paints a thousand words. Etc. You really need to be "on the ground" to be able to give correct advice as even pictures don't show up everything!

riclad

]Heres a sketch of the existing layout,
S = the site where the extension goes.
14 wide x8ft , height 20 fppt ,not including the roof height .
eg extension consists of 2 rooms, each 14ft wide , 10ft high.
The house is t shaped, so the extension simply fits in the space between the 2 walls ,on the right and the left.
One wall is owned by a neighbour,
the neighbours wall is like a rectangle, it,s blank ,no windows , i,d leave a 1ft space on the neighbours side ,
to allow space for the existing pipes .look at the image in the post lower down,
its flipped around to make it at the corrent angle.

riclad

One more image flipped around to make it easier to see.
S in image = place where the extension will be built.

riclad

I wonder can i build on to the wall which is part of my neighbours house,
or do i need to leave a 12inch gap all the way down to ground level.

Gumbo

No photos of the actual elevation??

Metric Tensor

Despite all the attachments OP you have only posted two zoomed up photos of a bit of your infamous pipe!

But ...


That's a sewer and vent pipe. It definitely serves a toilet or some such off to the right. I'd imagine that's the toilet in your house. It may also serve toilets in your neighbours house coming out through the wall you seem to be calling "the gable."

It will be connected to a sewer beneath the ground which you will also need to move or build over. You need to find out what's beneath before you can make any more decisions regarding the waste pipe.

Also - it appears to be cast iron which would indicate it to be quite old - this might mean that what you find underground could be further complicated by age and construction style.

riclad

i did a survey before i bought the house,
the metal vent pipe goes straight down to a sewer pipe ,
this sewer pipe is 7 ft approx below ground level.
This underground pipe goes under the house into the main
sewer pipe in the street .

This vent pipe is located a few inches from the boundary wall ,on the left hand side.
About 12 ft up as shown in the photo,
a pipe from the 1st floor bathroom goes into sewer vent pipe .
This house is 150 years old.
the front roof is approx 27 ft high.
The vent or the sewer pipe is not connected to the the neighbours house on either side.
I have no intention of moving any pipe,
i,ll simply leave a 1ft space on one side of the extension,
on the left,
to avoid building near the pipe.

The neighbours house is about 27 ft high,
its blank, theres no windows .
There,s the vent pipe and also one drain pipe which goes straight
down the wall.
This pipe is located at the end of the gable,
8ft approx from the kitchen wall .

theres a gap ,4ft high . between the metal bathroom roof and the main
roof of the house.
its rectangular 4ft high x 14ft wide.

I know the location of all the sewer pipes .
IF i get planning permission , i can dig down at certain points to verify this.

riclad

the front roof is approx 27 ft high.
The metal vent pipe or the sewer pipe is not connected to the the neighbours house on either side.
I have no intention of moving any pipe,
i,ll simply leave a 1ft space on one side of the extension,
on the left,
to avoid building near the pipe.



So the extension would fill most of the space formed by the
the gap between the wall on the left and the wall on the right
which is owned by me.
eg this gap is 14ft wide, with a depth of 8ft.

I,LL post photos of the rear elevation roof,.
As soon as i can.

riclad

Heres photos of the rear of the buiding, and side wall,s .

riclad

Heres more photo,s ,
By the way my neighbour has weeds inside his gutter,
i have no ladder that can reach 25 ft so i cant remove them.

riclad

I did more measurements,
the present extension is made of wood,
its 10ft `wide by 8ft deep,
So thats 80x2 total size is 160sq ft.
I intend to remove all the wood panels on the rear walls ,
and replace the wall with bricks or 9 inch blocks.
If i build a new extension the roof will be about 25 ft high.
The roof over the wood extension slopes up from 20ft to 23 ft .
And the width of the new extension would be 10ft .
Both rooms, kitchen and bathroom are 10x8 foot in side.