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When is a single storey and single storey (for planning)

  • 29-03-2015 11:50am
    #1
    antiskeptic
    Registered Users, Registered Users 2 Posts: 9,555 ✭✭✭


    On a past extension, the rear-of-house location of the stairs meant I was forced into pitched roof sloping from high on one side of the extension (high enough to span over the stairwell) to low (more or less normal ceiling height on the other sidewall. For simplicities sake I continued this pitch out over the full depth of the extension, giving me a high ceilinged single storey structure.

    What rules/principles govern how high can a single storey extension be (assuming sticking within exempted development rules)?

    Following on, is a mezzanine within a single storey structure considered a second storey?


Comments

  • #2
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Refer to exempted development items below.
    As regards a mezz, that's a 'first floor' and the additional floor area would need to be considered

    http://www.irishstatutebook.ie/2001/en/si/0600.html
    1. (a) Where the house has not been extended previously, the floor area of any such extension shall not exceed 40 square metres.

    (b) Subject to paragraph (a), where the house is terraced or semi-detached, the floor area of any extension above ground level shall not exceed 12 square metres.

    (c) Subject to paragraph (a), where the house is detached, the floor area of any extension above ground level shall not exceed 20 square metres.

    2. (a) Where the house has been extended previously, the floor area of any such extension, taken together with the floor area of any previous extension or extensions constructed or erected after 1 October 1964, including those for which planning permission has been obtained, shall not exceed 40 square metres.

    (b) Subject to paragraph (a), where the house is terraced or semi-detached and has been extended previously, the floor area of any extension above ground level taken together with the floor area of any previous extension or extensions above ground level constructed or erected after 1 October 1964, including those for which planning permission has been obtained, shall not exceed 12 square metres.

    (c) Subject to paragraph (a), where the house is detached and has been extended previously, the floor area of any extension above ground level, taken together with the floor area of any previous extension or extensions above ground level constructed or erected after 1 October 1964, including those for which planning permission has been obtained, shall not exceed 20 square metres.

    3. Any above ground floor extension shall be a distance of not less than 2 metres from any party boundary.

    4. (a) Where the rear wall of the house does not include a gable, the height of the walls of any such extension shall not exceed the height of the rear wall of the house.

    (b) Where the rear wall of the house includes a gable, the height of the walls of any such extension shall not exceed the height of the side walls of the house.

    (c) The height of the highest part of the roof of any such extension shall not exceed, in the case of a flat roofed extension, the height of the eaves or parapet, as may be appropriate, or, in any other case, shall not exceed the height of the highest part of the roof of the dwelling.

    5. The construction or erection of any such extension to the rear of the house shall not reduce the area of private open space, reserved exclusively for the use of the occupants of the house, to the rear of the house to less than 25 square metres.

    6. (a) Any window proposed at ground level in any such extension shall not be less than 1 metre from the boundary it faces.

    (b) Any window proposed above ground level in any such extension shall not be less than 11 metres from the boundary it faces.

    (c) Where the house is detached and the floor area of the extension above ground level exceeds 12 square metres, any window proposed at above ground level shall not be less than 11 metres from the boundary it faces.

    7. The roof of any extension shall not be used as a balcony or roof garden.


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