If so, there are a number of requirements you need to know about.

All building consent applications for alterations to an existing building are subject to section 112 of the Building Act 2004.

Section 112 requires that an alteration must not cause a compliant building to become non-compliant, or a non-compliant building to comply to a lesser degree. 

For more information visit our Alterations to existing buildings web page or refer to the guidance below.