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1. General alterations, maintenance and removal

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 1. General alterations, maintenance and removal >
This section includes exemptions for building maintenance, repairs, replacement, interior alterations, penetrations and removals.

1.3 Penetrations (1. General alterations, maintenance and removal)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 1. General alterations, maintenance and removal > 1.3 Penetrations >
A building consent is usually not required to make a penetration up to 300 mm through internal or external components.

3.2 Alteration to entrance or internal doorway to facilitate access for persons with disabilities (3. Windows, doors and walls)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 3. Windows, doors and walls > 3.2 Alteration to entrance or internal doorway to facilitate access for persons with disabilities >
A building consent is usually not required to improve an existing entrance or internal doorway for disabled access.

4.2 Drainage access points (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.2 Drainage access points >
An authorised person can work on a drain via a purpose-made access point without a building consent.

4.3 Repair and maintenance of existing water heater (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.3 Repair and maintenance of existing water heater >
An authorised person can maintain water heaters associated with buildings without needing a building consent.

4.4 Replacement of open-vented water storage heater connected to supplementary heat exchanger (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.4 Replacement of open-vented water storage heater connected to supplementary heat exchanger >
An authorised person can replace certain open-vented water storage heaters without needing a building consent.

4.5 Replacement or repositioning of water heater connected to controlled heat source (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.5 Replacement or repositioning of water heater connected to controlled heat source >
An authorised person can replace or reposition an existing water heater in certain circumstances.

4.6 Minor alteration to drains (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.6 Minor alteration to drains >
An authorised person can alter an existing private drain without a building consent in a dwelling.

4.7 Alteration to existing sanitary plumbing (excluding water heaters) (4. Plumbing and drainage)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 4. Plumbing and drainage > 4.7 Alteration to existing sanitary plumbing (excluding water heaters) >
An authorised person can carry out alterations to sanitary plumbing in certain circumstances.

5.1 Thermal insulation (5. Insulation and moisture barriers)

Projects & consents > Planning a successful build > Scope and design > Check if you need consents > Building work that doesn't need a building consent > Exempt building work guidance > 5. Insulation and moisture barriers > 5.1 Thermal insulation >
A building consent is not required to insulate an existing building, except for external walls and internal firewalls.
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This information is published by the Ministry of Business, Innovation and Employment’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people: