Size matters: Extra rooms drive big jumps in Kiwi borrowing

Data reveals which home upgrades really move NZ prices

Size matters: Extra rooms drive big jumps in Kiwi borrowing

New data from realestate.co.nz shows that in today’s market, bedrooms and bathrooms are doing heavy lifting on price – and therefore on how much your clients may need to borrow.

In 2025, the national average asking price for a two-bedroom home was $640,794. This jumped to $844,009 for a three‑bedroom home, an increase of 31.7%. The biggest step change came with the fourth bedroom: the average asking price surged 44.1% to $1,216,635.

Vanessa Williams (pictured), spokesperson for realestate.co.nz, says the trend underlines the enduring appeal of space. 

“Kiwis are still attracted to more space and see value in that, whether it’s to accommodate a growing family, work-from-home flexibility, or future-proofing an investment,” Williams said.

For Kiwi mortgage advisers, that focus on space is landing in a market where first‑home buyers remain the main source of demand in 2026, while investors stay cautious and house price gains look modest rather than boom‑like.

Bedroom–bathroom combos: half a million in price difference

It’s not just bedroom count that matters. The biggest gains show up when you get the bedroom–bathroom combination right.

In 2025, the average asking price of a three‑bed, two‑bath home was $987,609. This increased by almost 40% to $1,376,229 for a three‑bed, three‑bath home – a difference of $388,620.

For larger properties, a four‑bed, two‑bath home averaged $1,173,682 but climbed 44% to $1,690,982 with a third bathroom, a gap of more than half a million dollars. Within every bedroom category, adding bathrooms pushes prices significantly higher, confirming bathrooms as a major price driver.

 

Renovation decisions and rental risk in a shifting market

Williams cautions that not all upgrades are equal. 

“We know bedrooms and bathrooms affect average asking prices but before homeowners embark on a renovation, liveability needs to be factored in,” she said. “An odd layout that adds a bedroom or bathroom but reduces living, dining, or entertaining space, or negatively impacts the flow within a home, is less likely to bring the gains owners are hoping for.

“Not all renovations are created equal, as buyers are drawn to homes that suit their lifestyle. We always encourage homeowners to think about who they’re renovating for – themselves or future buyers.”

For Kiwi mortgage advisers, these trends create an opportunity to guide clients on how bedroom and bathroom choices – or renovation plans – translate into borrowing capacity, valuation risk, and long‑term resale and rental potential.

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