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3 Vs 2 storey, which one would cost more?

  • 18-09-2023 7:22pm
    Registered Users Posts: 311 ✭✭

    Assuming the 2 houses have the same size (150sqm), which one of the 2 would cost more to build in your opinion assuming:

    1- the 2 storey is made of 2 equal storey of 75sqm

    2-the 3 storey has 3 floors of 50 SQM. The last floor is basically an attic starting with an height 1.5m from the external wall

    3-Both houses have an icf frame


  • Registered Users Posts: 311 ✭✭spupazza

    Any idea?

  • Registered Users Posts: 475 ✭✭delusiondestroyer

    Id imagine the 3 story? more complex build and more windows and floors?

  • Registered Users Posts: 3,652 ✭✭✭Buddy Bubs

    3 story for sure. More windows, albeit smaller, more electric points, an extra stairs, extra floor, extra restrictions due to height regulations possibly, more difficult build.

    Only reason 3 floor houses exist in the likes of new developments is to reduce footprint and land costs.

  • Registered Users Posts: 311 ✭✭spupazza

    Extra floor and windows cost I'd imagine should be similar since the overall floor area is the same, just distributed differently (over 3 floors instead of 2).

    In relation to restrictions to height regulations, total height for the 3storey would be the same of a 2 storey with a 12:12 pitched, since it'll basically be the attic with 1.5m height on the perimeter. It would not be be higher than 10m on the ridge, would that be deemed to high in your opinion?

    In relation to the complexity, I've read that ICF walls are quite strong so adding a third floor shouldn't add extra complexity.

    For the electric points they should be the same,the rooms will just be distributed differently (same as for the windows,or am I missing something?)

    Foundations and roof should cost 33% less given the reduced single floor area.

    Post edited by spupazza on