Step 1: Applicants check what is required for the proposed alteration

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This process is suitable whether or not the building being altered is earthquake prone.

If the alterations requirements apply, proceed to Step 2.

For earthquake-prone buildings subject to section 133AT, also check whether the alteration meets the definition of a substantial alteration.

Building (Specified Systems, Change the Use, and Earthquake-prone Buildings) Regulations 2005 defines the term 'substantial alteration' for earthquake-prone buildings.

Guidance on substantial alterations is available to help establish whether the proposed alteration meets this definition. If it is a substantial alteration, seismic work needs to be undertaken so that the building is no longer earthquake prone.

Additional resources

The following will help you work through the above diagram:

• Check if you need consents
• Exempt building work
• EPB notices
• Guidance on substantial alterations
• Building (Specified Systems, Change the Use, and Earthquake-prone Buildings) Regulations 2005 is available on the Legislation website