A weather system that closed State Highway 6 between Greymouth and Westport on 6 September and spread flooding, slips, and snow across the central South Island has brought the West Coast’s insurance market conditions into focus – conditions that were already under strain before the first slip was reported.
AA Insurance placed an underwriting hold on new home, business, and landlord policies in the 7825 postcode – covering Westport, Carters Beach, and Cape Foulwind – after its internal flood exposure measures reached set limits. The hold, communicated to Buller District Mayor Chris Russell in a letter at the end of 2025 and confirmed by the insurer in January 2026, remains in place. No public announcement of a reopening had been made at the time of publication. AA Insurance head of underwriting Dee Naidu told RNZ: “This decision reflects the elevated natural hazard risk of flooding in the area, and that our exposure has reached a level where a pause on new policies is the most responsible step to ensure we can be there for our existing customers when they need us most.”
For brokers with clients in the corridor affected on September 6, the hold means the available panel for new commercial placements in Westport is narrower than it was 12 months ago – and the September 6 event is unlikely to alter that position.
New Zealand Transport Agency Waka Kotahi (NZTA) confirmed SH6/Coast Rd between Greymouth and Westport was closed due to a slip at Meybille Bay, telling the public to avoid the section between Punakaiki and Fox River or delay travel. The closure followed heavy rain and widespread surface flooding, fallen trees, and other slips across the West Coast and central South Island, according to 1News. NZTA received reports of flooding on SH6 in the Lower Buller Gorge, on parts of State Highway 7 between Greymouth and Reefton, and on State Highways 7 and 65 between the Hanmer Springs turnoff and Murchison. Treefalls were recorded on SH6 at Berlins and Inangahua Junction and on State Highway 67 near Westport. Snowfall was also affecting Lindis Pass in Otago, with limited snow possible at Porters Pass, Arthur’s Pass, and Lewis Pass through Monday morning.
MetService maintained an orange heavy rain warning for the Grey and Buller Districts and Nelson Lakes until 1am Monday, noting the warning level meant streams and rivers may rise rapidly and that surface flooding, slips, and difficult driving conditions were possible. The event was not isolated. NZTA bulletins show SH6 has faced repeated disruptions from slips and flooding in 2026. In late August, crews worked through the weekend to clear approximately 30 slips on a closed section between Makarora and Lake Hāwea.
SH6 is a key road connection between the West Coast's main centres, including Greymouth, Hokitika, and Westport. When it closes, tourism operators, freight carriers, and hospitality businesses dependent on that route face revenue disruption – but their business interruption (BI) policy may not respond when premises remain physically intact. Business interruption cover in New Zealand commonly responds following insured physical loss or damage, although policies can include extensions for circumstances such as prevention of access, transport-route closures, suppliers, customers, and public utilities. The scope and geographic triggers vary by wording. For example, Tower Insurance’s published business interruption cover provides prevention-of-access cover where insured damage within a one-kilometre radius hinders or prevents access to the premises, while Vero’s published BusinessPlan wording specifies a 10-kilometre radius for its prevention-of-access extension. For brokers, that means a highway closure or slip outside the insured premises does not automatically establish BI cover: the relevant policy trigger, distance limit, insured damage requirement, and any transport-route or public-authority extension need to be checked against the actual wording.
The Barn Underwriting Agency says businesses in tourism and logistics face added BI complexity because of factors including seasonal revenue fluctuations and remote or regional operations. It also warns that even short periods of downtime can result in lost clients or prolonged financial strain. The agency says 12- or 18-month indemnity periods are standard in New Zealand, with longer periods of 24 to 36 months available for complex rebuilds or regulatory-driven industries. For brokers, the appropriate period depends on how long a business could realistically take to restore operations and return to pre-loss trading levels – particularly where revenue is highly seasonal.
For brokers, the three renewal conversations the September 6 event supports are: whether a denial-of-access or transport route closure extension is operative on the policy schedule, not merely referenced in a product guide; whether its geographic and damage triggers respond to a state highway closure; and whether the indemnity period reflects the revenue recovery timeline for a business that faces repeated access disruptions across a season.
The affordability pressure already evident in the West Coast compounds the coverage-adequacy question. Consumer NZ’s 2025 report found that, among people without house insurance, the share who had cancelled or not renewed cover because of cost rose from 7% in 2022 to 17% in 2025. Insurance also ranked among New Zealanders’ top four financial concerns, behind housing, food, and household debt. The Insurance Council of New Zealand (ICNZ) reported in 2024 that around 96% of New Zealand homes had residential insurance cover.
The Natural Hazards Commission (NHC) scheme does not provide cover for commercial property. For storm and flood damage, NHCover covers certain residential land, while damage to residential buildings is generally dealt with through private insurance. NHC data reported in May 2026 showed that landslides had generated more claims than any other natural hazard, with almost 13,000 landslide claims recorded over the previous five years – about 10,000 more than in the preceding five-year period.
According to the ICNZ Cost of Natural Disasters database, the South Island severe weather events of October 2025 generated $158.9 million in insured losses from 16,885 claims – the largest single event recorded in that database for the year – with commercial material damage accounting for $74.4 million and business interruption contributing $9.3 million. The full-year 2025 extreme weather total was $278.2 million.
The Resilient Westport programme, a flood-protection scheme being advanced by West Coast Regional Council, is part of the councils’ efforts to improve the area’s insurability following AA Insurance’s decision to temporarily stop offering new home, business, and landlord policies in the 7825 postcode. The council has said it intends to update insurers as different stages of the scheme are completed, with the aim of encouraging a wider range of insurers to consider Westport risks. West Coast Regional Council Chair Colin Smith said he was “confident the work that was put in in 2025 will really pay dividends in 2026 and beyond” and that the work could help “restore confidence to the insurance industry and the wider community.” Whether that confidence extends to reopening the panel for new commercial business in Westport – before another West Coast weather season – is the question brokers with clients in the corridor cannot yet answer.
