Bathroom move from downstairs to upstairs

I'm looking to move my bathroom from downstairs to upstairs. (It's an old house).
The main building work, I guess, would be to cut a hole for, and install, a frosted-glass window, and cut a hole for a toilet and bath/sink waste pipes.
I know where I want the bathroom and have started to stud out part of a bedroom to accommodate it.
My question is, ballpark, how much to do the window and the waste holes, and what permissions would I need.

Asked by Gareth on 8th Apr 2024
Expert Trade Answers
"Hi Gareth, this wouldn’t be a problem however you would need an architect and engineer to do a drawing for the work to be carried out and these would be submitted to the council for a building warrant. A lintil and cill would need to be inserted before the window was fitted and this would need an engineer to specify what lintil was required. Also the architect would need to do a drawing with stud walls new layout and drainage.

After all that’s done and the drawings submitted and warrant granted then a contractor could price the works to the spec. Anything other would be purely guessing

Regards James"
Answered on 8th Apr 2024 - Member since Jan 2024 - report
"Depending on where you live each council is different.
Will the waste pipe be near the mains drains are you wanting just a hole or the waste connecting size of window are you allowed to have a window would it affect next door there are lots of factors in your request
But roughly you be looking in access £1200 Labour but quite possibly considerably more"
Answered on 14th May 2024 - Member since Apr 2022 - report
"Hello, I'm Matt I've been a builder for thirty years. I've carried out this type of procedure many, many times. The cost depends on how far up the flu you want to go. For example, a complete removal starts at the ground through the first floor up into the attic and out the roof removing the chimney too. Obviously, there needs to be walls plastered and patches made wherever the floor or roof has holes. Alternatively, wherever you want to stop, a lot of people go into the loft cap the chimney and a hangman's bracket is attached under the remaining flu. There is a lot of bricks to take away, dust etc and initially noisy. Total removal alone is roughly £1000 - £1200 per flu. This doesn't include any plastering or patching."
Answered on 15th Apr 2024 - Member since Jan 2023 - report
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