1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Out Building 30m2 floor area internal or external?

Discussion in 'Building Regulations and Planning Permission' started by Wass87, 6 Apr 2020.

  1. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Hello All,

    Please be kind i am new to this forum!
    well firstly i hope all are well and safe with whats currently going on.

    I'm currently in the process of building an outhouse under PD; I plan for it to be no more than 2.5m in height, cavity wall with a flat EDPM roof. The outhouse does not makeup more than 50% of garden space and it will be a double block cavity wall. I have been told that this should be fine as it is "built substantially of non combustible material".

    My confusion is that without getting building control involved, would it be the internal space that cannot exceed 30m2 or the actual footprint? I have read a few old post that states its the internal dimensions of the actual floor not external but i have also asked a a friend who advised it is 30m2 external and that he was told this by an inspector that come out onto site :S I also asked a friend of a friend who is an architect who advised it is the external space but from what i have read it is believed to be 30m2 internally.

    Read more: https://www.diynot.com/diy/threads/what-a-thicko.542438/#ixzz6IriSJwCy
     
  2. Sponsored Links
  3. johnny2007

    johnny2007

    Joined:
    11 Jan 2012
    Messages:
    2,289
    Thanks Received:
    337
    Location:
    London
    Country:
    United Kingdom
    It's always been external.
    Why don't you want to involve BC?
    Do you know that building an extension without any control would make your house more difficult to sell?
    Also, the council could enforce a demolition if they think the structure is dangerous.
    Take my advice: for the sakr of a few hundred, get BC involved and use their expertise.
    There are some engineers who are very good and advise on all aspect of the construction, all included in the fee.
     
  4. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Thanks for your response, Ok so its defiantly external. Thats fine at least i can press forward now!
    initially it was just the cost factor as i am aware that building control can bring up costs etc.
    I might give them a call and work out some pricing.
    My footings are bug out at 4 foot deep and I've hit very stable soil and as nothing has been done as of yet might just get them involved to do a proper job and your right about selling but i do not have no intention selling.
    I'm surprised many other threads on this forum suggest its internal!
     
  5. charliegolf

    charliegolf

    Joined:
    7 Jan 2014
    Messages:
    1,360
    Thanks Received:
    107
    Location:
    West Glamorgan
    Country:
    United Kingdom
    It's measured between the internal faces of the external walls.
     
  6. JohnD

    JohnD

    Joined:
    15 Nov 2005
    Messages:
    67,895
    Thanks Received:
    3,725
    Location:
    Coastal
    Country:
    Cook Islands
    that's why it's called "floor" area.
     
  7. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Sorry Charlie, I know I'm being a little special here but I don't quite understand. :unsure: so if it's a cavity wall is it measured from the internal of the inner skin? As in would the 30m2 be the actual floorspace within the building or is it the full floor area I am covering with the actual building itself?
     
  8. Thought you had established that for bldg. reg purposes it is the external area, that is outside the external walls, not the internal floor area.
     
  9. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Thank you Leofric, it's been a long day lol.. Sitting at home for two weeks has drove me crazy!
     
  10. Sponsored Links
  11. know what you mean, but as long as the sun is shining and we can still go out for a walk it isn't too bad (y)
     
  12. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Make sure your keeping that two meter distance Pal ;)
    I'm in the garden digging up trenches, thought why not weather's good and I could use the exersize unfortunately:(.
    Anyway thanks for the advice and stay safe!
     
  13. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    11,113
    Thanks Received:
    1,671
    Location:
    Hertfordshire
    Country:
    United Kingdom
    And you decided to join this crazy bunch of fools on DIYnot..............good luck!

    :ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO:

    Andy
     
  14. DevilDamo

    DevilDamo

    Joined:
    14 Jan 2010
    Messages:
    1,838
    Thanks Received:
    305
    Country:
    United Kingdom
    @Wass87 Floor area for Building Regulation purposes is always internal, not external. This is also how and why they determine their fees on an internal floor area basis (when proposals do require BR approval). Some of the replies here still confuse between internal and external hence having to clarify.

    “The Building Regulations define floor area as:

    ...the aggregate area of every floor in a building or extension, calculated by reference to the finished internal faces of the walls enclosing the area, or if at any point there is no such wall, by reference to the outermost edge of the floor”
     
  15. DIYhard

    DIYhard

    Joined:
    21 Dec 2018
    Messages:
    23
    Thanks Received:
    5
    Country:
    United Kingdom
    Extract from Statutory Instrument 2010 No 2214 - The Building Regulations 2010 (England & Wales)

    “floor area” means the aggregate area of every floor in a building or extension, calculated by reference to the finished internal faces of the walls enclosing the area, or if at any point there is no such wall, by reference to the outermost edge of the floor;
    http://www.legislation.gov.uk/uksi/2010/2214/made

    Does this definition of floor area no longer apply, or might the OP be in a different part of UK?

    Sorry, you got there before me.
     
  16. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    Lol I've literally been scratching my head at home trying to work out if it's internal or external and I keep getting mixed responses! Planning department are closed and apparently emails will be respone is ten working days!
     
  17. Wass87

    Wass87

    Joined:
    6 Apr 2020
    Messages:
    31
    Thanks Received:
    4
    Country:
    United Kingdom
    I read this on a previous forum and actually went onto the legislation. Gov website and read the exact same thing. I've asked several people now and i still keep getting mixed responses. I also interporated it as internal space from wall to wall.
     
Loading...

Share This Page