For information on making changes to approved plans and specifications see below
You need to check with your local Council about approval for any changes to plans that are already approved. Plan changes may also be affected by district plan requirements.
Also, for all changes to the approved plans and specifications, it is important that these changes are approved in writing by the owner and the designer before submitting the altered plans to Council, and before any changes are made to the building.
For all changes to the approved plans and specifications, it is important that these changes are approved in writing by the owner and the designer before submitting the altered plans to Council, and before any changes are made to the building. You need to check with your local Council about approval for these changes. This may also be affected by district plan requirements.
If the change is considered MINOR, it is a variation (often called a minor variation, or minor amendment) and all that may be required is a handwritten and signed letter saying what you plan to do and a copy of the plans or specifications with these changes written/drawn on them. The legal definition of minor variation is found in the Building (Minor Variations) Regulation 2009:
Clause 3 Minor variation defined
If the change is considered MAJOR, it is an amendment (often called a major amendment, or just an amendment) and you will need to fill in a new Building Consent Application and provide all the associated plans and documentation. If the changes involve Restricted Building Work you will also need to supply a Certificate of Design Work from the designer. An amendment is treated as if it is a new building consent application – as required by section 45(4) (b) the Building Act 2004.
For examples of minor variations and major amendments, see the Building System Performance (MBIE) website.
NOTE: Don’t be confused by MBIE’s terminology of Major Variation. Just focus on whether or not the change is major or minor and what is required.
When applying for a building consent with an issued national multiple-use approval, or for an amendment to such a building consent, changes may be made to those plans and specifications if—
If any other changes are made to the plans and specifications, the national multiple-use approval does not apply. In which case, the applicant must apply for a building consent covering the whole building project, not just an amendment to the plans and specifications.
Building Act 2004,
All major amendments must be approved before any related construction begins. Failure to do so will mean that the work is not covered by the building consent or the CCC. To carry out construction that does not comply with the approved and consented documentation is illegal and there are consequences for those that choose to do this.