Relevant rules in the Regulation:
- Schedule 1, Part 1.4, Division 1.4.1, Section 1.20.
Internal alterations to a building may include:
- internal repairs, renovations or upgrades
- new kitchen fitouts
- shop or office fitouts, and
- removing internal walls.
An internal alteration does not need DA approval if:
- its building class doesn’t change under the building code
- there's no increase in gross floor area (for a non-residential building), and
- it complies with relevant general exemption criteria.
A non-residential building is one that isn't used for residential purposes and not a class 10 building associated with a building used for residential purposes. For example, a private garage associated with a home is a residential building.
Also see: internal alteration BA exemptions.