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DEAP report to demonstrate Part L compliance Extension

  • 31-10-2022 8:22am
    Registered Users Posts: 2

    I’m building a side extension in Co Donegal. Planning was approved last year and I submitted an opt out commencement notice last week. They came back asking for ‘ DEAP report to demonstrate Part L compliance ‘

    Im assuming this is just a BER for the extension to ensure it meets Part L? Looking back on planning application I don’t see this report having been submitted. Wasn’t sure if extensions ended to meet part L, the existing house is 80+ years old.

    Thanks in advance


  • Registered Users Posts: 332 ✭✭Biker1

    Part L compliance reports are only for new builds and not for extension onto existing houses. What I usually do in these cases is draft a letter to the council explaining this and that the building fabric will be built to meet at least the backstop u-values in Part L.

    Failing this get a BER assessor to do an assessment on the entire house including proposed extension and send the dwelling report from DEAP to the council along with the above letter.

  • Registered Users Posts: 2 cormac123

    Thanks for this advice, really appreciate it

  • Moderators, Society & Culture Moderators Posts: 36,512 Mod ✭✭✭✭Gumbo

    OP, do you fall under the new Part L regs whereby you are carrying out works above the 25% rule?

    Therefore the whole house needs evaluation and cost beneficial upgrading.