Westpac Banking (ASX:WBC, NZE:WBC) is offering five-year interest-free home loan top-ups to Westpac NZ Choices home loan customers to improve the resilience of their homes to natural hazards and extreme weather, according to a Wednesday Australian bourse filing.

The customers will be able to borrow up to NZ$50,000 interest-free for five years to cover things such as installing ground moisture barriers under homes, improving drainage on their properties, and carrying out work to raise outdoor electrical appliances above potential flood levels.

Options to raise houses above potential flood levels, and to remove chimney structures, will also be available effective Feb. 2, 2026.

The bank's shares rose nearly 1% in recent trading on both the Australian and the New Zealand bourses.