Bathroom Layout and Toilet Plumbing Questions for a Small Ensuite

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I am planning on repurposing part of our family bathroom to be an ensuite to one of the bedrooms by adding a new door and putting up a stud wall. I've not created the new doorway yet, so am still somewhat flexible as to its placement along the long wall.

Space is tight and the ensuite will measure 1000mm by 2000mm. Within that space I've managed to draw out (to scale) everything I want included on a piece of paper (below).
jOW2RzL.jpg

Note: 1 block is 100mm by 100mm.

Two questions:
  1. The max. opening I can create for the door (outward opening) will be 800mm, but I'd ideally need it to be a little smaller for the door lining not to interfere with the door lining.
    1. Assuming a 686mm door is the minimum allowed, what is the minimal width of wall to remove to fit a door like this?
  2. As there's limited space for the toilet...
    1. I'd ideally use a 500mm back to wall toilet. This would however require me to locate the concealed cistern in the cupboard on the wall to its right, and have the pipes running in a U-shape from the cupboard to its right to the back to wall toilet through. I am sure I can chase out the wall along the 400mm to hide the pipework. Or is this a bad idea?
    2. Alternatively I'd use a 600mm space saver toilet, but this depends on the options for the door, as I don't want to bang my shins on the toilet every time I go through the door.
 
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Open to alternative layouts/ideas. Doorway has to be on the long end though.
Toilet is located against the external wall as there is already a toilet there.
Shower drains will run under sink and toilet cistern cupboard.
 
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No restrictions on door widths, I've got a 600mm on my toilet and works fine. Opening will be door width, plus 2mm clearance either side plus lining width. I'm not convinced a flush pipe will work properly going round two 90° bends. Possibly a quadrant shower or (I don't know the technical name) a square one with the corner "cut" off will allow the door to be further to the right.

If you like a bit of hard work you could knock a few bricks out of your inner skin:

IMG_20220111_104433434.jpg


IMG_20220111_110238179.jpg
 
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That is ingenious and impressive. Is that yours? Did you fit a lintel above it?
 
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Yes, it's mine. It's only 500mm wide so I didn't bother with a lintel, I've done a few before and they've been fine.
 
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I like the idea of a 600mm door too, especially if there's no building regs saying it's not allowed. The 10 - 14 cm I'd gain would come in handy.
 
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Hmmmm ... don't know about that, like the OP, that just screams possible problems in the future to me. If that's load bearing then I'd want someone to confirm that would be ok without support being put in.
 
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Hmmmm ... don't know about that, like the OP, that just screams possible problems in the future to me. If that's load bearing then I'd want someone to confirm that would be ok without support being put in.
I've taken out some old doorways, so have some spare lintels. If I end up going down that route, I'll definitely put one in. Considering how little added effort and cost there is, I might as well.
 
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Won't hurt if it worries you, but about the same size as a gas meter box and plenty of those without a lintel.

Just for further info, on the doors, here's a couple of 600's (my downstairs utility area with WC beyond) no problems with access:
IMG_20220114_102603177_MP.jpg


My ensuite has a 626mm door, outward opening, fairly similar layout to yours (loo on left, shower on right, about 0.8m X 2.4m):
IMG_20220114_102808262.jpg


And, another un-linteled cistern in the wall - been in about 4 years:
IMG_20220114_102706759.jpg
 
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Thanks for sharing these. Very insightful and good examples of what we can achieve with the space. Is that a towel rack above the door?
 
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Is that a towel rack above the door?

Yes. The space is very small so we've tried hard to utilise every bit of space without making it feel cramped. The tightest bit is the basin/door area which is where you land out of the shower but the basin is recessed into the wall and the door is on the "outside' of the frame so it just about works, and as it's an ensuite we usually just wrap in a towel and get dressed in the main bedroom.

IMG_20220114_145943371.jpg
 
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I assume that recessed wall is a stud wall? How thick is it and how did you create the recess? Loving what you did there, so now trying to figure out how to copy it ;)
 
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Unfortunately not, a brick internal wall. Cut a load of slots with a 9" grinder and chiselled it out - nasty job.

IMG_20180904_095401977.jpg
 
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