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Adding sqm at ground vs first floor

  • 31-01-2021 10:51pm
    #1
    kiptinui
    Registered Users, Registered Users 2 Posts: 29 ✭


    We're designing a renovation plan for an extension etc. at the moment for a bog-standard suburban semi-d, about 90sqm in all.

    Nothing much weird about it except we have a large side passage (about 2.6m).

    We are adding about 17sqm in our plan.

    For 3sqm of that we have a choice of extending up (at first floor, on top of existing extension) or extending at ground floor at the back.

    Ground floor would obviously involve new foundations, some disruption to pipes etc. and first floor would involve integration with existing roof, or a new roof or whatever.

    My question is - which is usually cheaper, extending up or extending at ground floor?!


Comments

  • #2
    Gumbo
    Moderators, Society & Culture Moderators Posts: 39,737 Mod ✭✭✭✭Gumbo


    kiptinui wrote: »
    We're designing a renovation plan for an extension etc. at the moment for a bog-standard suburban semi-d, about 90sqm in all.

    Nothing much weird about it except we have a large side passage (about 2.6m).

    We are adding about 17sqm in our plan.

    For 3sqm of that we have a choice of extending up (at first floor, on top of existing extension) or extending at ground floor at the back.

    Ground floor would obviously involve new foundations, some disruption to pipes etc. and first floor would involve integration with existing roof, or a new roof or whatever.

    My question is - which is usually cheaper, extending up or extending at ground floor?!

    Depends on supports available for the first floor and how the of can be integrated into the existing.

    Also don’t forget to check your planning required at first floor.


  • #3
    kiptinui
    Registered Users, Registered Users 2 Posts: 29 ✭kiptinui


    Gumbo wrote: »
    Depends on supports available for the first floor and how the of can be integrated into the existing.

    Also don’t forget to check your planning required at first floor.

    Support would be newly built as part of the plan so will be fine. It’s all new. We’re basically trying to figure out if it’s cheaper to build up to gain 6sqm or out at ground floor to do same. Will get a QS on the case eventually. Planning should be fine too, we will def need it regardless.


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