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How to find out if a property has flooded before

We want to help homeowners be better informed about their property and its flooding history.

4 minutes read By Katherine Johnson
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In light of New Zealand’s wild weather during summer 2023, we want to help homeowners be better informed about their property and its flooding history.

Why is a property’s flood history important?

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Flooding and water damage can lead to foundational erosion and decreased structural integrity. Even if you’ve owned your property for a few years, there may be undiscovered damage lurking below, so it’s a good idea to be aware of your property’s flood history to avoid problems in the future.


Before significantly investing in a new property, make sure you know what you’re getting — a ‘too good to be true’ deal on a property might just be that. It’s possible the sellers aren’t even aware of previous damage so due diligence on your part is essential. Otherwise, you might be signing up for extensive remedial work. If you do find yourself in a position where you need help with repairs and property maintenance, get in touch with your nearest Oncore team.


You’re obligated to disclose any issues or property damage to potential buyers. If you don’t, you could be held liable. Avoid putting yourself, and future homeowners, at risk by thoroughly researching your property’s history.


If your property has a history of flooding, you’ll want to make sure you have appropriate insurance in place. Premiums can be significant depending on your property’s flood-risk assessment but if you ever experience flooding, you’ll be happy you’re covered.

What signs should I look for when checking to see if my property has flooded before?

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We’ll discuss resources you can use to check if your property has flooded before later on. But we want you to be aware of visible warning signs that will let you know if your property has flooded before and what clues to look for indicating it may be vulnerable to flooding in the future.

Signs of past flooding

Water stains and cracks are the more obvious signs. But pay special attention to warped joinery or gaps around window and door frames. If there are waterways near your property, take notice of the varying water lines and survey your soft landscaping to identify spongy or uneven areas. Talk to your nearest Oncore team if you’ve witnessed any of these warning signs around your property.

Signs of future flooding

Low points are the first to flood. That includes being at the bottom of a hill on an otherwise higher elevation. Consider other elements such as steep driveways that funnel water towards a residential structure; pile vs. concrete foundations; clogged gutters, downpipes, and storm drains; and cracks in a wall or foundation.

Is there a database I can check to see my property’s flood history?

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There are a number of helpful resources you can utilise to get a comprehensive history of your property. These resources are specific to the Auckland region so check out your council’s website for localised information.

  • Auckland Hazard Viewer | In addition to flood zones, this map shows historic geographical earthquake, volcanic, and tsunami activity and offers vital information regarding each disaster scenario.
  • Land Information Memorandum (LIM) | This is a comprehensive record kept for all properties that outline details such as hazards, debts, and issued consent history. Learn how to apply for a LIM report here.
  • Property File | Similar to an LIM, a property file includes historical records of a home or property with information such as council correspondence and consent documents.

What measures can I take to prevent my property from flooding in the future?

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Controlling the weather is impossible. Future-proofing your property isn’t. An Oncore Branch Owner can make recommendations that will put your property in the best position possible to avoid flooding and water damage in the future.

Oncore offers property maintenance services such as gutter and downpipe repairs that will help keep your drain system clear. We can also help with drainage and irrigation solutions; driveway and paver pathway optimisation (porous materials such as concrete and asphalt are ideal for driveways); and interior updates such as raising electrical sockets and installing water-resistant flooring.

If you’re worried about flood risks or have general concerns about the state of your property, get in touch with your local Oncore team. We offer free consultations and are eager and available to answer your questions.