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Minor plumbing alterations

​When you may need a consent for minor plumbing alterations

You may need a building consent if you are making alterations to your existing bathroom or laundry such as adding a:

  • bathtub
  • toilet
  • laundry fixture
  • shower vanity.

A consent may be needed for a gully trap for a new bathroom or laundry.

This is the case even if an authorised person completes the work.

You will need to apply for a building consent if the work involves either:

  • adding an extra sanitary fixture to your house where there was not one previously
  • replacing a fixture that requires a larger plumbing outlet.

You are unlikely to need a building consent for plumbing and drainage work involving the repair or replacement of an existing sanitary fixture such as a sink or toilet pan. However, you need to seek advice and do your research before undertaking any work.

More information on work that is exempted under Schedule 1 of the Building Act 2004 is available on the MBIE Building Performance website.

Terraced housing, apartment units and tiled floor finishing

If the alterations are being made in terraced housing, apartment units or areas with tiled floor finishing then you may need a consent, see Apply for a project information memorandum or building consent.

Work by an authorised person

The term "authorised person" covers:

  • registered certifying plumbers and drainlayers
  • plumbers and drainlayers with a provisional license working under supervision
  • trainee plumbers and drainlayers working under supervision.

You must make sure the plumber or drainlayer you are using for your building work has current authorisation from the Plumbers, Gasfitters, and Drainlayers Board.

What you should know before applying for a consent for minor plumbing alterations

We recommend that the supplier or installer of the appliance completes and submits the application on your behalf.

You will need to supply a letter authorising the installer to act on your behalf with the application.

After your device has been installed, your installer will also need to provide a completed producer statement construction (PS3) plumbing.

The installer must be listed on our producer statement authors register for this discounted fee to apply.

​Minor plumbing alterations consent fee

Read fee table.
Minor plumbing with a producer statement where value of work is less than $5,000 - Fixed Fee (non-refundable, no additional charges) $309

​How to apply for a consent for minor plumbing alterations

We only accept online applications. If you need help with your online application, visit one of our service centres.

Call us on 09 301 0101 to speak with our building and planning help desk if you have questions regarding your application.


​Upload the completed Lodgement checklist: Residential and Agreement to provide producer statement during construction.

You will need to login to complete the online application and pay by Visa, MasterCard, Online EFTPOS or Account2Account (bank transfer).

​What happens next

We will process your application within 20 working days.

We will let you know the decision by email and through our online portal.

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