Flood risk has become an unavoidable part of buying and developing property in the Bay of Plenty, but those working closest to the market say it’s not derailing sales. Instead, better mapping and earlier conversations are changing how risk is understood and where expert advice now fits into the process.
At the coalface, real estate agents say flood mapping is no longer something buyers stumble across late in due diligence. It’s now one of the first checks made.
Barfoot & Thompson Cherrywood Branch Manager Louise Findlater says agents routinely review council flood maps at the start of a listing, often before a LIM report is ordered.
“It’s become part of the standard conversation,” she says. “Buyers and vendors can see the same information straight away, which helps everyone understand what they’re dealing with early on.”
That early visibility, she says, has changed behaviour but not demand.
“Flood risk on its own doesn’t necessarily stop a sale; it becomes part of what buyers weigh up. It still comes down to the property as a whole – location, layout, lifestyle – and each buyer’s appetite for risk”.
Findlater says the biggest shift is when flood risk is considered, not whether people are prepared to proceed.
“Some buyers will step aside once they see flood mapping, others are comfortable continuing. That can narrow the buyer pool, but it doesn’t make properties unsaleable.”
In fact, she says clearer information upfront can help deals move forward more smoothly.
“When people understand where flooding might occur - whether it’s confined to part of a section, an overland flow path, or an area that doesn’t affect the house footprint - it’s often far less alarming than a coloured map with no explanation.”
Findlater says tools like Tauranga City Council’s online mapping system have made flood information far more accessible to the public.
“Anyone can jump online and check flood layers for a property now,” she says. “We’re using the same maps buyers can see, which means these conversations are happening much earlier than they used to.”
From a technical perspective, CKL Tauranga branch manager Daniel Brown says recent plan changes and improved modelling have significantly increased the number of Bay of Plenty properties identified as subject to flood hazards.
“Sites that weren’t previously affected are now captured by flood overlays,” Brown says. “That’s been challenging for some landowners, but it reflects better data and a stronger focus on managing risk.”
Across Tauranga and the wider Bay of Plenty, flood hazard mapping has been updated over recent years to reflect improved rainfall modelling, climate change allowances and sea level rise assumptions. These updates, in accordance with the regional and national planning frameworks, mean more properties are now flagged for flood considerations than in the past, often where long-term owners have never experienced flooding.
However, Brown says council flood maps are designed to assess risk across whole catchments, not individual sites.
“They’re a vital starting point, but they can’t capture every detail of how water behaves on a specific property.”
That distinction, he says, is critical, and often misunderstood.
“From a distance, flood mapping can look quite confronting. But when you drill down to the site level, the actual risk is sometimes far more limited or manageable than it first appears.”
That gap between high-level mapping and on-the-ground reality is driving growing demand for detailed, site-specific flood assessments.
“These assessments look at minimum floor levels, overland flow paths, stormwater capacity, ponding areas, on-site obstructions and potential on-site mitigation options,” Brown says.
“In many cases, a property that looks concerning on a map can be shown to have manageable risk once it’s properly assessed.”
He says that clarity is increasingly important not just for planning and consenting, but for market confidence.
“When flood risk isn’t properly understood, it creates uncertainty, and uncertainty is what causes problems for buyers, insurers and lenders.”
That point is reinforced by managing director at Financial Independence Insurance Brokers, Ben Ruthe, who says updated flood mapping now has direct implications for insurability.
“Insurers use a mix of their own modelling and council flood maps, typically focusing on 1-in-100-year and 1-in-10-year flood zones,” Ruthe says.
While outright refusal to insure remains relatively uncommon, he says the impact of flood risk is often felt through premiums, excesses and policy conditions.
“The bigger issue arises when a property can’t be insured at all. If that happens, banks generally won’t lend, and the buyer pool is suddenly limited to cash buyers.”
In those situations, Ruthe says property values can fall sharply - sometimes by 30 to 40 percent - not because the home can’t be lived in, but because finance is unavailable.
Ruthe says the timing of when flood risk is identified is crucial.
He recently dealt with a case where a buyer had gone under contract on a property before fully understanding its flood exposure.
“Insurance hadn’t been properly confirmed upfront,” he says. “Once flood risk came to light, the buyer had to work quite hard to exit the contract.”
The issue, he says, wasn’t flood risk itself, but late discovery and lack of certainty.
“That’s very similar to what happened after the Christchurch earthquakes, when insurance confirmation became a standard condition of sale.”
Both Brown and Ruthe say this is where site-specific engineering reports play an increasingly important role.
“Insurers place far more weight on site-specific engineering assessments than generic flood maps,” Ruthe says. “If an engineer has assessed the property and demonstrated how risk is mitigated, that information carries real influence.”
Public infrastructure upgrades can also influence flood risk, but both caution against relying on unfunded or long-term plans.
“There’s an important difference between infrastructure that exists and infrastructure that’s aspirational,” Brown says. “Until something is funded and delivered, risk is assessed based on current conditions.”
Ruthe adds that insurance policies are annual contracts.
“Insurers focus on today’s risk profile, not what might change in 10 or 20 years. That said, completed upgrades that demonstrably reduce flood risk can have a positive impact over time.”
As flood mapping becomes more detailed and the consequences of uncertainty grow, all three experts expect demand for site-specific assessments to continue increasing.
Findlater says buyers are becoming more comfortable engaging experts earlier.
“People aren’t necessarily walking away,” she says. “They’re asking better questions.”
Ruthe sees the same trend from an insurance perspective.
“More people are willing to invest in engineering and mitigation work to protect their asset and maintain insurability.”
For Brown, that reflects a broader shift in how flood risk is viewed.
“Flood risk doesn’t have to be a dealbreaker, when it comes to property development,” he says. “But it does need to be properly understood. Site-specific assessments give people clarity about what the risk actually is and how it can be managed, and that certainty is becoming increasingly important in today’s market.”
