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Lowering a floor to create a mezzanine

Discussion in 'Building' started by Nomadic78, 28 May 2021.

  1. Nomadic78

    Nomadic78

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    Hi all

    Hope you are well?

    We are planning on extending our current tiny flat in London. We currently have a small living kitchen room that we are planning on extending.

    The ceiling height is good at 2.8 metres and we are on a slope. So a potential plan would be to lower the space so we don't lose garden space with steps.

    At the same time I think it is possible to create a mezzanine with the new head height. This would be a playroom or a third bedroom.

    Question is how much work is involved in lower a floor by about 1.4 metres? Picture attached shows the current layout.

    Thanks

    Dan
     

    Attached Files:

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  3. 1) Whats that opening that can be seen in the bottom left of the photo?

    2) London is the "lets dig a basement" capital of the world - there must be loads of specialist companies who could come and actually look at the site and tell you whats involved?
     
  4. KenGMac

    KenGMac

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    Must admit, this is one thing I would not go near, the excavation of a basement in an existing property, bluntly is scares me.

    Having said that there are as posted above by "Captain Nemesis" there are many Companies in the area who will have [various] degrees of expertise in this niche field.

    Ken.
     
  5. Deluks

    Deluks

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    Is there rear/side access to get rid of the spoil?
    If not then it's coming through the front door/window.
    There will be a lot and it will be disruptive. It might just be cheaper to move to a less tiny flat.
     
  6. cdbe

    cdbe

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    Or down the trouser legs and spread round the garden. Hopefully there will be a partial void under the floor already.
     
  7. Tigercubrider

    Tigercubrider

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    I guess the first thing to establish is that being a flat, you have the right to excavate any form of basement?
    There would be consequences for the other householders.

    Have you lifted a floorboard or two to investigate what's under your existing back floor? You might discover that there is already a massive space under there?
     
  8. DIYnot Local

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