Putting a bathroom in a stupid place - advice needed!

[suckonthatmaureen]

Obviously we will be getting builders in for quotes, but I'm looking for advice, suggestions (and ballpark figures). We're currently at the musing stage!

We want to put an extra bathroom in our 2nd floor. Due to ceiling pitches and needing to use the other rooms as bedrooms, we would like to use a unused bedroom. Conveniently enough, this is the furthest away from the soil pipes!! (please see 1st and 2nd floor layout, it's the room next to the stairs) Floor joist direction goes in our favour. There is a chimney breast in the bedroom which leads all the way down to the cellar. House is semi detached.

As far as I can see, we have 3 options and I would be interested to see which is the most easiest and cost effective.

1. Put whole bathroom in spare bedroom. I am aware this will not be easy nor cheap! Assume this would also need a macerator?

1. There is a large store cupboard at the end of the hallway, could easily fit a loo and sink in there. Then put shower room and additional sink in bedroom

1. There is currently just enough floor space in store room, but has a pitched roof. Could possibly put in a dormer and turn into wetroom?

I have a figure of 15k, but I'm guessing this could be more if we have to put in a proper wetroom/dormer? Also included a partial rewire, one new velux in landing and ceiling skim for landing and 3 bedrooms on 2nd floor in the figure. We're in the NW.

Where is the door to bedroom 7?

Could you move the door of bedroom 6 closer to bedroom 5 , then pinch some space from 6 and 7 and move the cupboard door further down the hall toward the stairs. Should then be big enough ?

Ah yes, forgot to mention it was missing from the estate agent floorplan!
It's in the same place as the bedroom opposite. We can't move the doors to extend the store cupboard onto the landing, due to roof pitches.

In that case I'd make bedroom 6 the bathroom. There is a bathroom below it so shouldn't be too much work the get pipe work up there.

Sorry should have made it a bit clearer in OP. Bedrooms 6&7 are my DD's bedrooms. The unused bedroom can not be used comfortably as a bedroom, due to the roof pitches. This is unfortunate and annoying, as I agree it would be so much easier to swap!
We could fit a single bed in there, but there would be no space for wardrobes, desk etc.it also had an awkward dormer, and door placement combo! The other two bedrooms have space for double beds and already have built in wardrobes.
We could fit a small ensuite in there though, which is why I'm wondering if it's possible.

I would look at rearranging the landing space, doors etc. Can you rejig the walls completely and end up with a bathroom between the current 2 bedrooms - make one more of an L shape or perhaps only 2 bedrooms up there both with en-suites?

So move door to bed 6 right next to room 5, then the spare landing and cupboard and poss part of bed 6 all become part of bed 7?

Could you knock down the wall between beds 5 & 6 and use bedroom 5 and half or two thirds of 6 for your DD and the rest of 6 for the new shower room?

Alternatively, how big is the store cupboard? You may only need to borrow say 30cm from one of the bedrooms to fit an 80x80cm shower in at one end and a toilet at the other. Do you have a front view of the house so we can get an idea of the roof pitches?

I’d move the fours to bedrooms 6&7 down to allow you to increase the size of the ‘cupboard’ to give you enough space for shower, washbasin and loo. No probs with soil pipe, most cost effective solution

I'm struggling to imagine the roof layout , bedroom 5 only has enough space for a single bed because of the pitch of the roof ? Isn't that room the one that joins with next door ? I can't see from the picture how big the rooms are , I'm guessing 4m by 4m ish ?

2 larger bedrooms are about 5x4m and are both in the gables, so have plenty of height.

The bedroom we want to use is about 3.5x4m
Probably hugely outing, but I'll attach a estate agent picture of the hallway and the room in question. We can easily move the door for 6, (as this is the most obvious solution), but not the one for room 7, as there is a roof joist right next to it.
The door to room 5 is slightly open, and you can just see where the roof starts to pitch.

I've also added a picture of the bedroom 5, it's an estate agent picture, so appears bigger and is taken from the door. It's almost triangular! The little table is a coffee table for scale. Where the computer table is where we'd like to put the shower.

So if you moved the door for 6 to where the organ is you then have all that landing beyond it to be part of room 7 so then a decent sized bedroom??

Have any of your neighbours done it?
Where are the existing drains in relation to the house - front/back or RHS only?
If you dropped the waste pipe down the chimney to the cellar, does that give you a route to the drains somehow?
Couple of considerations:
Do you already have a pressurised HW system?
Does your existing soil stack already vent higher than the top floor bedrooms?

Sorry for the delay in responding. There is a flat conversion next door so assuming they've put a bathroom up there.

Can't put soil-pipe down chimney unfortunately, no connection to drains. Drains are RHS only.

System is pressurised, boiler suitable for large house. Soil stack vents are high.