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This Practice Note provides guidance on the energy efficiency requirements for alterations to an existing Class 1 building and compliance with the Building Act 1993, the Building Regulations 2018 and the National Construction Code 2019.
- Compliance requirements for alterations to existing buildings
- Alterations and extensions to existing buildings
- Using NatHERS software to assess a proposed alteration to an existing dwelling
- Applying Elemental Provisions to a proposed alteration to an existing building, and
- Relocated and prefabricated homes.
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Version history
Category
Energy efficiency 2022
Document number
04
Version
5.0
Published
20 December 2023
Superseded versions
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