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Evidence · Home lending

The questions and original answers

Explore every question and captured response in the home-lending study, including answers asked nationally and from four cities.

questions
193
captured answers
1,094
AI platforms
4
collected
11 October 2026

01

Every question, with its answers

Each question was written as a voter would ask it and went to all four assistants. Some were also asked from a town. Open a question to read every answer to it in full.

Showing 20 of 193 questions

Show all 193

02

The tables behind the study

Every figure on the study page comes from these tables. They are CSV files, which open in any spreadsheet.

  • Question catalogue

    questions.csv

    One row per question.

    Question ID, borrower, exact question, group and collected answers

    193rows

    Download question catalogue (CSV)

  • Answers

    answers.csv

    One row per answer, with its full text.

    Answer ID, question ID, borrower, assistant, city, words, coded recommendations, showed a link and full text

    1,094rows

    Download answers (CSV)

  • Sources by answer

    sources.csv

    One row for each website recorded as a source of an answer.

    Answer ID, question ID, assistant, city, website and publisher type

    4,574rows

    Download sources by answer (CSV)

  • Checks against official sources

    checks.csv

    One row per statement checked.

    Check, answer ID, assistant, what the answer said, verdict, what the source says, source and date

    4rows

    Download checks against official sources (CSV)

  • Recommendation coding

    recommendation-coding.csv

    One row per coded national loan-choice or support answer.

    Answer ID, question ID, borrower, assistant, question group, recommended lenders and supporting passages

    360rows

    Download recommendation coding (CSV)

  • Platform comparisons

    platform-recommendation-counts.csv

    One row per platform, lender and question group.

    Matched panel, recommended answers, denominator and supporting answer IDs

    105rows

    Download platform comparisons (CSV)

  • City comparisons

    city-recommendation-counts.csv

    One row per city, lender and question group.

    Matched panel, recommended answers, denominator and supporting answer IDs

    112rows

    Download city comparisons (CSV)

Use these tables to trace findings back to the original questions and answers. The full text of each answer is also on this page, under its question.

03

Read in full and checked

Some answers were read in detail or checked against official sources. Those appear on the study page, beside the findings they support.

ChatGPT · National

best bank mortgage top up renovation

If you're in New Zealand and want to top up your existing mortgage to pay for renovations, the best bank will usually be the one offering the lowest overall borrowing cost while letting you access your home's equity on suitable terms.

You don't necessarily need to switch banks. Your current lender may be the easiest place to start, but it's worth comparing other banks before committing.

Which NZ banks are worth comparing?

  1. ANZ New Zealand — worth checking first

ANZ offers an Reno Loan of up to $50,000 for eligible renovations, with a three-year fixed-rate offer and a minimum 20% equity requirement. Confirm the current rate directly with ANZ. Buying your next property | Home Buyer Handbook

View ANZ Reno Loan

  1. BNZ — good for flexible renovation borrowing

Offers standard mortgage top-ups for renovations, with fixed or floating options. BNZ says fees of up to $100 for a top-up and up to $150 for establishment may apply. Major renovations can require plans, consent and a valuation. Home loan top-ups

View BNZ top-ups

  1. ASB — worth comparing if you're already a customer

ASB offers mortgage top-ups and a separate Better Homes Top Up for eligible improvements. Its standard home-loan top-up is subject to lending criteria and fees. Home loan interest rates and feesCan I get a top up on my ASB home loan?

View ASB rates and fees

  1. Westpac New Zealand — particularly for energy upgrades

Westpac's Greater Choices Home Loan offers 0% interest for five years on eligible energy-efficiency upgrades, up to $50,000. This isn't a general-purpose renovation loan. Bank loans for home energy upgrades

View Westpac home loans

What I'd recommend

  • Kitchen, bathroom, flooring or general renovations: Compare ANZ's Reno Loan with a standard top-up from your existing bank.
  • A large renovation or extension: Ask your current bank for a separate loan split, so the renovation debt can have its own repayment period.
  • Solar panels, insulation or eligible energy improvements: Check the special low-interest offers before using a standard mortgage top-up.

One important point: although mortgage interest rates are often lower than personal loan rates, paying renovation costs over 20–30 years can mean paying considerably more interest overall.

Let me narrow it down to the best bank for you

I can give you a more useful recommendation if you tell me these three things.

Ask anything

ChatGPT can make mistakes. Check important info.

Captured 11 October 2026

Gemini · National

best bank mortgage top up renovation

When looking to finance a home renovation through a mortgage top-up in New Zealand, the "best" bank largely depends on your existing mortgage provider, your equity stake, and whether your renovation incorporates eco-friendly or energy-efficient upgrades.

Because a mortgage top-up is tied to your property's equity, interest rates across all major NZ lenders (ANZ, ASB, Westpac, BNZ, Kiwibank) are significantly lower than standard personal loans or credit cards.

Key Options Across Major NZ Banks

  • ANZ (ANZ Reno Loan & Standard Top-Ups): ANZ offers targeted renovation loan products like the ANZ Reno Loan (which sometimes features promotional fixed rates for specific renovation categories, such as a 3-year fixed promotional rate for qualifying home upgrades). If your renovation includes insulation, double glazing, heat pumps, or solar, you can look into their Good Energy Home Loan, which offers a heavily discounted 3-year fixed rate (typically around 1% p.a. up to $80,000).
  • Westpac (Greater Choices / Green Loans): Westpac is well-regarded for competitive standard mortgage top-up flexibility and aggressive green lending options (such as 0% p.a. for up to 5 years on certain EV and sustainability home packages). For general renovations, standard owner-occupier rates apply, usually mirroring your primary mortgage structure.
  • ASB (Better Homes Top Up): ASB allows simple online applications via their mobile app for existing customers. They offer the Better Homes Top Up scheme at a discounted 1% p.a. fixed rate for 3 years (up to $80,000) if your renovation involves eco-friendly upgrades or energy efficiency.
  • BNZ & Kiwibank: Both offer seamless top-up structures. Kiwibank provides a sustainable energy loan top-up with cash contributions toward clean tech systems over a multi-year period, while BNZ provides structured "Better Future" top-up options.

Critical Criteria to Consider

  1. Your Current Lender vs. Refinancing: Staying with your current bank is usually the most cost-effective choice. Moving to a different bank for a top-up means discharging your current mortgage, which can incur legal fees, discharge fees, and potential break costs if your current fixed rates haven't expired.
  2. Equity Requirements: New Zealand registered banks generally require you to maintain at least 20% equity in your home (40% for investment properties) to easily approve a standard top-up without high-risk loan margins or requiring a formal valuation.
  3. Loan Structuring (Fixed vs. Revolving Credit):
    • A Fixed Rate top-up gives you certainty on repayments, which is ideal if you are borrowing a lump sum for a builder or fixed-contract renovation.
    • A Revolving Credit facility or Offset Mortgage can be brilliant for staged renovations. It allows you to draw down cash incrementally only as invoice payments are due to your tradespeople, meaning you only pay interest on the exact amount used at that moment.

Recommended Next Steps

  1. Check your equity: Calculate your current property value minus what you still owe on your mortgage to ensure you have clear headroom above the 20% equity threshold.
  2. Audit your renovation goals: If any part of your renovation involves heating, insulation, double glazing, or solar, explicitly ask your bank for their green/sustainable home loan top-up tier to secure drastically reduced interest rates (often near 1%).
  3. Contact your current bank's mobile app or home loan specialist: Log into your banking app (e.g., ASB FastNet, ANZ internet banking) to run an initial borrowing power assessment or submit a fast-track top-up application.

Are you planning standard cosmetic renovations (like a kitchen or bathroom), or are you including energy-efficient upgrades that might qualify for special green rates?

Ask Gemini

Gemini is AI and can make mistakes.

Captured 11 October 2026

Google AI Mode · National

best bank mortgage top up renovation

When looking to fund a home renovation in New Zealand, a mortgage top-up (extending your existing home loan) is almost always cheaper than a standalone personal or renovation loan. Standard floating or fixed mortgage rates tied to your home loan are significantly lower than unsecured or specialized renovation personal loans, which can spike into double digits.

The "best" bank for a mortgage top-up depends on your current equity, whether your renovation is eco-friendly/energy-efficient, and who holds your primary mortgage.

Key Options Across Major NZ Banks

  • Your Current Lender (The Easiest Route): Staying with your current bank (whether it's ANZ , ASB , BNZ , Westpac , or Kiwibank) is usually the most seamless option for a top-up. If you have sufficient equity (typically at least 20% home equity) and your income/serviceability supports the extra debt, they can often process a top-up quickly without needing a full refinance. Check details directly via BNZ Borrowing to Renovate or your respective bank's app.

  • Green/Sustainable Upgrades (Special Low Rates): If your renovation involves eco-friendly upgrades—such as solar panels, double glazing, heat pumps, insulation, or an EV charger—major banks offer heavily discounted "green" top-up rates:

  • ANZ: Offers the Good Energy Home Loan with a low fixed rate (around 1% p.a.) for up to $80,000 over a 3-year term.

  • ASB: Offers the Better Homes Top Up at a similar 1% p.a. fixed for 3 years up to $80,000.

  • BNZ: Offers the Better Future Home Loan Top Up at 1% p.a. fixed for 3 years (up to $80,000).

  • Westpac: Offers specific low/zero-rate structures under choices like their Greater Choices framework for qualifying sustainable home enhancements.

What You Need to Qualify

  1. Equity: You generally need at least 20% equity in your property (40% for investment properties). If the renovation significantly increases the value of the home, a registered valuation may or may not be required depending on how much you are borrowing relative to the purchase price.
  2. Consents: For major structural renovations, banks will want to see council consents, builder contracts, and plans before releasing funds in stages. For minor cosmetic updates (kitchen refreshes, painting, small non-structural decks), a simpler top-up application via your mobile banking app or mortgage broker suffices. [BNZ]
  3. Servicing: The bank will re-test your income and living expenses against the total new loan amount under current credit regulations.

You can compare current baseline floating and fixed rates across all institutional providers using live tracking tables on interest.co.nz Mortgages or independent overviews like MoneyHub NZ Home Renovation Loans. Mortgages | interest.co.nz

If you'd like to narrow this down, tell me:

  • What kind of renovation you are planning (cosmetic vs. structural/eco-friendly)
  • Who your current mortgage is with
  • Roughly how much you're looking to borrow

I can give you a clearer idea of the best approach or special rates available.

Ask anything

Captured 11 October 2026

AI Overviews · National

best bank mortgage top up renovation

AI Overview

The best bank for a mortgage top-up for renovations in New Zealand depends entirely on the type of renovation you are doing. If you are doing eco-friendly upgrades (like insulation, heat pumps, solar, or double glazing), Westpac , ANZ , ASB , and BNZ offer market-leading sustainable "green" top-ups with interest rates as low as 0% to 1% p.a.. For standard or structural renovations, you will typically need to stick with your current mortgage provider to access a standard top-up rate (averaging around 5.5% to 6.5% p.a.), provided you maintain at least 20% equity in the property.

1. Best for Eco-Friendly Upgrades (Green Top-Ups)

If your renovation involves making your home warmer, drier, or more energy-efficient, you should heavily leverage New Zealand's highly competitive bank green loans. These are the cheapest ways to borrow money in NZ.

Bank Special Product Interest Rate Maximum Amount Fixed Term Key Conditions
Westpac Greater Choices Home Loan 0% p.a. $50,000 5 years Must hold a Westpac home loan; no establishment fees.
ANZ Good Energy Home Loan 1.0% p.a. $80,000 3 years Reverts to standard floating rate after 3 years.
ASB Better Homes Top Up 1.0% p.a. $80,000 3 years Minimum 20% equity required for owner-occupiers.
BNZ Better Future Home Loan Top Up 1.0% p.a. $80,000 3 years $5,000 minimum; requires 20% equity.

2. Best for Standard Renovations (Kitchens, Bathrooms, Painting)

For standard renovations that don't qualify for green lending, your best option is a Standard Mortgage Top-Up with your current lender.

  • The Rule: Switching banks entirely (refinancing) just for a top-up can incur costly break fees and legal costs. Therefore, your "best" bank is usually your existing provider unless you are coming to the end of a fixed-term contract.

  • Equity Requirements: You generally must have at least 20% equity remaining in your home after taking out the top-up loan. If you have less than 20% equity, banks may require a registered property valuation.

  • Loan Structures: You can request the top-up as a separate fixed-rate slice or put it on a revolving credit/offset account. Revolving credit acts like an overdraft, meaning you only pay interest on the money as you actively spend it on contractors or materials.

3. Best for Major Structural Extensions

If you are moving walls, adding bedrooms, or doing structural work that requires Council Consent , standard top-ups might not be allowed upfront.

  • Banks like ANZ , BNZ , and Westpac will shift you toward a Construction Loan rather than a simple top-up.

  • Money is released in progressive "staged drawdowns" as your builder hits milestones.

  • You will need to provide the bank with a fixed-price building contract, council-approved plans, and comprehensive Contract Works Insurance before funds are released.

Key Tips Before Applying

  • Check Government Grants First: Before topping up your mortgage for insulation or heating, check if you qualify for the EECA Warmer Kiwi Homes programme, which covers 80% to 90% of those costs for lower-income or specific regional areas. Use a bank top-up only to cover the remaining balance.

  • Watch the Loan Term: Topping up your mortgage for a $30,000 kitchen sounds cheap at a 6% mortgage rate, but if you leave it floating on a 25-year mortgage term, you will pay far more in total interest than a short-term 3-year personal loan. Always aim to pay off your renovation top-up aggressively over a short timeframe.

To help point you in the right direction, could you share a bit more about your project?

  • What is the estimated cost of the renovation?

  • Do you know roughly how much equity you currently have in your home?

  • Does the project include structural changes that need council consent, or is it mostly cosmetic/energy-efficient upgrades?

Ask anything

Captured 11 October 2026