For a family upgrading to a bigger home in New Zealand, I'd prioritise lenders that offer flexible bridging finance, a sensible way to manage two mortgages temporarily, and the option to carry your existing mortgage across to the new property.

My recommendation is to compare at least three lenders before committing: your current bank, one or two competing major banks, and ideally an independent mortgage adviser who can compare the options available to you.

The key issue isn't just getting the lowest advertised interest rate. It's making sure you can afford the transition if your current home takes longer to sell than expected.

My recommended lenders

These are the lenders I'd approach first, based on their published home-buying and bridging-finance options. The best one for your family will depend on your equity, income, current mortgage and how quickly you expect to sell.

1. ANZ New Zealand — best first quote for a straightforward bridging loan

ANZ explicitly supports bridging finance to let you buy before selling, and offers access to home loan specialists who can talk through the transition.

Why I'd consider it: A practical starting point if you want to secure the next home without having to coordinate both settlement dates perfectly.

Ask about: How long the bridging facility can run, the interest rate, and how much you must repay each month while owning both homes.

Source: ANZ bridging finance. Bridging Finance

2. BNZ — best for understanding open versus closed bridging

BNZ explains both types of bridging finance clearly. Closed bridging applies when the sale and purchase are unconditional but settlement dates differ. Open bridging applies when your current home hasn't sold yet.

Why I'd consider it: Its published guidance is particularly useful for understanding the risks and requirements before making an offer.

Ask about: Whether you qualify for open bridging, the approved term, and what happens if your home sells below its expected price.

Source: BNZ bridging finance guide. How bridging finance works

3. Kiwibank — best for comparing the full next-home plan

Kiwibank provides a next-home calculator to explore borrowing capacity and repayment scenarios. It also explains how an existing mortgage may be transferred to a new property and how additional borrowing can be structured.

Why I'd consider it: Particularly useful if you want to compare buying first, selling first, and the amount of extra borrowing you will need.

Ask about: Whether transferring your existing fixed-rate loan is possible, and the total cost of any bridging arrangement.

Source: Kiwibank buying your next home. Buying your next home | Home loans

4. Westpac New Zealand — best for exploring alternatives to bridging

Westpac describes options including increasing an existing home loan temporarily, using bridging finance, and transferring an existing loan to a new property.

Why I'd consider it: You may have more than one way to finance the move, particularly if you already have a Westpac mortgage.

Ask about: Which structure would minimise interest, fees and early repayment costs for your specific circumstances.

Source: Westpac options for your current home. Options with your current home

What matters most when you buy before selling?

Bridging finance is temporary borrowing that covers the period when you own both properties. It can make moving easier, but the risk is that your existing home takes longer to sell or sells for less than expected. How bridging finance worksThinking about your finances when selling

I'd compare lenders on these five points:

What to compare	Why it matters
Maximum borrowing	Can you afford the new purchase while your existing mortgage remains in place?
Interest and repayments	Some bridging loans allow interest-only payments, but you still have to cover your existing mortgage.
Loan term	Find out the deadline for selling and repaying the bridging debt.
Existing fixed rate	Transferring your current loan may help avoid early repayment costs, subject to approval.
Plan B	Work out what happens if your home takes six months to sell or sells for less than expected.

The NZ Government's Settled.govt.nz guide to selling costs and bridging finance is a useful independent starting point. Thinking about your finances when selling

My preferred approach for your family

1. Start with your existing lender. Ask for a written proposal covering bridging finance and transferring or restructuring your current mortgage.
2. Get competing quotes from ANZ and BNZ, or Kiwibank if you want to compare its next-home planning tools.
3. Consider an independent mortgage adviser who can compare lenders beyond these initial options. Ask how they are paid and which lenders they can access.
4. Stress-test the numbers before making an unconditional offer. Include a conservative sale price, marketing and legal costs, moving expenses, and several months of overlapping ownership.

I wouldn't choose a lender based on its advertised fixed mortgage rate alone. The overall cost and flexibility during the transition could matter much more.

Let me narrow this down to your situation

The most suitable lender will depend heavily on your current mortgage and the equity you'll release when your existing home sells.

With those details, I can help you work out which lenders are most worth approaching first and whether bridging finance looks sensible compared with selling first or negotiating longer settlement dates.

For a family in Auckland moving to a larger home, especially where you may need to buy before selling, I would focus less on finding the absolute lowest advertised mortgage rate and more on lenders that are strong at:

• bridging finance / buying before selling
• handling complex lending structures
• giving you flexibility if your sale takes longer than expected
• offset, revolving credit, and loan-splitting features
• competitive fixed rates and fees

The “best” lender depends heavily on your income, equity, existing mortgage, and how much overlap you expect between homes, but these would be on my shortlist:

1. ANZ New Zealand — strong all-rounder for bridging and large moves

Why consider it:

• One of NZ’s largest mortgage lenders, with extensive experience handling large home purchases.
• Offers bridging finance specifically for situations where you buy before selling. ANZ Bank
• Often has good processes and a wide range of loan structures.

Potential downsides:

• Big banks can sometimes be less flexible than smaller lenders on unusual situations.
• Don’t assume the first rate offered is the best rate; negotiate.

Good fit if:

• You have substantial equity in your current Auckland home.
• You want a mainstream lender with broad capability.

2. ASB Bank — very strong for existing customers and family upgrades

Why consider it:

• Particularly worth considering if your banking is already with ASB.
• Has options designed around buying and selling at the same time, including bridging arrangements and ways to restructure lending. ASB Bank
• Good digital tools for tracking lending and property information.

Good fit if:

• You already have an ASB relationship.
• You want a smoother transition rather than moving everything to a new bank.

3. BNZ — worth a close look for flexible structures

Why consider it:

• Has experience with open and closed bridging finance. BNZ
• Its offset-style lending features can be attractive for families who keep savings, bonuses, or cash reserves available. Canstar

Good fit if:

• You want flexibility after moving.
• You expect your cash position to change during the transition.

4. Kiwibank — worth comparing for value and local focus

Why consider it:

• Often competes aggressively on pricing.
• Can be worth including in a mortgage comparison, particularly if you have a straightforward application. interest.co.nz

Potential downside:

• Depending on your situation, a smaller lending team may have less appetite for complicated bridging scenarios than the biggest banks.

5. Use a mortgage broker alongside these lenders

For your specific situation — buying before selling — I would strongly consider using a good Auckland mortgage broker. The key question is not just “who has the cheapest rate?” but:

• Who will approve the bridging amount?
• How long will they allow you to carry both properties?
• What happens if your current home sells for less than expected?
• Can they structure lending to minimise interest while you wait?

Bridging finance can be useful, but it carries the risk of temporarily servicing two properties and depends on realistic sale expectations. ANZ Bank

My shortlist for a family upgrading in Auckland

I would probably get proposals from:

1. ANZ — strongest starting point for a complex buy-before-sell situation
2. ASB — especially if you already bank there
3. BNZ — for flexibility and loan structure options
4. Kiwibank — as a pricing challenger
5. A broker comparison including smaller lenders

When comparing offers, ask each lender for:

• bridging loan maximum term
• bridging interest rate and fees
• whether repayments are principal-and-interest or interest-only
• their valuation requirements
• their serviceability assessment (can you carry both homes?)
• cash contribution and equity requirements

If you share roughly:

• your current home value,
• mortgage owing,
• household income,
• target new-home price range,
• and whether your current home is likely to sell quickly in Auckland’s market,

I can help narrow down which lenders are likely to suit your situation best.

Best home loan lenders for a growing family in Christchurch, NZ

If you're moving to a bigger home and may need to buy your next house before selling your current one, I'd prioritise lenders that are good at handling bridging finance, temporary overlapping mortgages, and flexible lending structures—not just those offering the lowest advertised interest rate.

The right lender could make a substantial difference to how much financial pressure you're under while owning two properties. Ideally, you'll have enough time to buy the right family home, move, and sell your existing property without being forced into a rushed sale.

1. What I'd look for in a lender

For your situation, I'd compare lenders across five areas:

• Bridging finance: Can the lender finance your new purchase while your existing mortgage is still in place?
• Serviceability: Can you afford the temporary period when you might be responsible for two mortgages, even if you intend to sell quickly?
• Loan flexibility: Can the lender structure your lending so the old and new properties are handled appropriately?
• Repayment options: Are interest-only repayments available during the bridging period, and what would they cost?
• Exit strategy: What happens if your existing home takes longer to sell than expected?

There are two broad approaches worth investigating:

• Closed bridging finance: Typically suited to buyers who have an agreed sale of their existing property and know when the sale proceeds will become available.
• Open bridging finance: Potentially suitable if you want to buy before you've sold your current home. It can be harder to obtain because the sale date and final proceeds are uncertain.

Since you haven't sold your existing home yet, I'd focus initially on lenders willing to assess an open-bridging arrangement or another suitable structure for buying before selling.

2. My recommended lenders to approach first

I'd start by comparing the major banks, particularly if you already have a mortgage with one of them. Existing customers may find it easier to explore how their current loan, equity and new borrowing could be structured together.

1. BNZ — my first choice to investigate

Best for: Families wanting a clearly defined plan for buying before selling.

BNZ specifically explains both open and closed bridging finance, making it a sensible starting point for your situation.

Why I'd consider it:

• BNZ describes open bridging for buying before your existing property has sold.
• It says bridging arrangements may run for up to six months for open bridging or up to 12 months for closed bridging, subject to the circumstances and approval.
• Some or all of the bridging lending may be eligible for interest-only repayments, subject to approval.
• BNZ also discusses transferring an existing mortgage to a new property, potentially preserving an existing interest rate and avoiding early repayment costs. Eligibility conditions apply. bnz.co.nz, bnz.co.nz

What I'd ask BNZ: Can you approve us to purchase a more expensive home before our current property sells, and what would our total monthly repayments be if the sale took six months?

Website: BNZ — How bridging finance works

2. ASB — best for exploring different loan structures

Best for: Homeowners who already bank with ASB or want flexibility when restructuring their mortgage.

ASB explicitly offers bridging finance for customers who want to buy before selling. It also discusses keeping an existing loan and establishing a separate loan for additional borrowing.

Why I'd consider it:

• You may be able to retain your existing home loan while arranging finance for the new property.
• Interest-only bridging repayments may help reduce short-term cash-flow pressure.
• ASB discusses potentially transferring an existing loan to the new property, which could be valuable if you're partway through a fixed-rate term and want to avoid break fees. asb.co.nz

What I'd ask ASB: Could we retain our current fixed-rate mortgage and arrange separate bridging finance for the new purchase? Would that be cheaper than breaking and restructuring our existing loan?

Website: ASB — Buying and selling a home at the same time

3. ANZ — best for a mainstream bank comparison

Best for: Families who want a straightforward bridging arrangement and help assessing affordability.

ANZ offers bridging finance designed to help customers purchase a new home without first selling their existing property.

Why I'd consider it:

• ANZ explicitly supports the concept of buying before selling, subject to lending approval.
• It encourages borrowers to assess whether they can meet both loan obligations and how long they'll need the bridging funds.
• ANZ offers different home loan structures, including fixed, floating and flexible options, which may be useful when deciding how to manage the permanent mortgage after the move. anz.co.nz, anz.co.nz

What I'd ask ANZ: How much could we borrow while temporarily owning both homes, and what happens if our existing home takes longer to sell than expected?

Website: ANZ — Bridging finance

4. Westpac — worth including in your comparison

Best for: Existing Westpac customers and homeowners considering a temporary increase in borrowing.

Westpac says it may be able to increase an existing Choices Home Loan temporarily or provide bridging finance when your new property settles before the proceeds from your current home become available.

Why I'd consider it:

• You can investigate whether increasing your existing lending is more appropriate than establishing a separate bridging loan.
• If you already have a Westpac mortgage, it may be worth exploring whether your current loan can move with you.
• You can compare its proposed structure with BNZ, ASB and ANZ rather than assuming one lender will be cheapest. westpac.co.nz

What I'd ask Westpac: Would you structure our purchase as a temporary increase to our existing mortgage or as separate bridging finance, and what are the costs and conditions of each?

Website: Westpac — Options for your current home

5. Kiwibank — worth checking, particularly if you're already a customer

Best for: Comparing the cost of moving your existing mortgage to a new home.

Kiwibank explains how homeowners can move their existing loan to their next property and how bridging finance can help when the purchase occurs before the sale.

Why I'd consider it:

• It provides a calculator for estimating borrowing capacity and assessing whether you could afford to own both homes.
• It explains how existing lending may be transferred to a new property.
• It gives you another major lender against which to compare the structure and cost of your proposed move. kiwibank.co.nz

What I'd ask Kiwibank: Can we use the equity in our current property to help purchase the next home, and what would our repayments look like while we own both properties?

Website: Kiwibank — Buying your next home

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3. Should you use a mortgage broker instead?

For your situation, I'd seriously consider speaking to an independent mortgage adviser alongside approaching your existing bank.

The reason is simple: buying before selling can be more complicated than taking out a standard home loan. You need to find a lender willing to approve the temporary debt, assess your family's income and expenses, and agree on a realistic plan for repaying the bridging finance.

A broker can compare lenders and help you understand the trade-offs between their offers.

Two Christchurch options worth investigating are:

• Loan Market Beyond — a local mortgage advisory practice that says it provides access to more than 30 banks and lenders and assists with next-home purchases and bridging loans. I'd consider this option if you'd like someone to compare mainstream bank lending options.
• NZ Non-Bank Mortgages — a Christchurch-based specialist adviser focusing on non-bank lending. I'd consider this if your income is complex, you're self-employed, or mainstream banks struggle to accommodate your circumstances. Non-bank lending can have higher costs, so I'd generally investigate it after establishing what the banks can offer.

These are options to investigate, not endorsements or guarantees of the best available deal. Ask each adviser how they're paid, which lenders they can access, and whether they have any relevant limitations.

4. How I'd choose between these options

Here's my suggested shortlist based on your circumstances.

Your situation	Where I'd start	Why
You already have a mortgage with one of these banks	Your current lender	It may be possible to retain or restructure existing lending.
You haven't sold your current home	BNZ and ASB	Both explain options for buying before selling.
You want a competitive comparison	ANZ and Westpac	Add these to the comparison to evaluate alternative lending structures.
You want to explore keeping your existing interest rate	Your current bank, plus Kiwibank	Ask about transferring existing lending to the new property.
Your income or lending circumstances are complicated	A mortgage adviser	They can help explore options across their lender panel.

I wouldn't choose solely on the lowest advertised mortgage rate. A slightly cheaper rate could be outweighed by less suitable bridging terms, early repayment costs, or an arrangement that leaves you financially stretched.

5. The biggest financial risk to plan for

Let's say you buy your next home before selling your current one.

For a period, you could be responsible for:

• Your existing mortgage repayments.
• Interest on the bridging loan or additional lending.
• Rates, insurance and maintenance on both properties.
• Moving costs, legal fees and the expenses involved in preparing your current home for sale.

Government guidance at Settled.govt.nz specifically warns that bridging finance can leave you with more debt than expected if your current home takes longer to sell or sells for less than anticipated.

Before committing to a purchase, I'd ask your lender to model three scenarios:

1. Optimistic: Your current home sells quickly for the expected price.
2. Realistic: It takes three to six months to sell.
3. Stress scenario: It takes longer than six months to sell, or you receive a lower offer than expected.

For each scenario, establish your total repayments, available cash reserves and remaining mortgage balance after the sale.

I'd also ask whether interest-only payments are available, when the bridging facility expires, and what happens if your existing property hasn't sold by that date.

Importantly, don't make an unconditional offer on a new home until your lender has confirmed that the required financing is approved. Even conditional pre-approval may not be sufficient for a particular property or transaction. See Settled.govt.nz's guidance on confirming your finances.

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6. Let me narrow this down to the best lenders for your family

I can make a much more useful recommendation if I understand your financial position. Three details will make the biggest difference.

First, which bank currently holds your home loan? If you don't have a mortgage, that's useful to know too.

Also, approximately how much is your current home worth, and how much do you still owe on it?

For example, you might have a home worth $850,000 with a $400,000 mortgage. That would give you approximately $450,000 in equity before selling costs, although not all of that equity would necessarily be available to borrow against.

With those details, I can help you identify which lenders are most worth approaching and how to think about the amount of bridging finance you might need.

For a family in Dunedin moving to a larger home, especially if you may need to buy before your current home sells, I would prioritise a lender (or mortgage adviser) who is strong on bridging finance, flexible lending structures, and fast approvals rather than simply chasing the lowest advertised interest rate.

I’d suggest comparing a few options rather than choosing one outright, because the best fit depends heavily on your income, equity, existing mortgage, and how quickly your current home is likely to sell.

Lenders I’d put on the shortlist

ANZ New Zealand

Why consider it:

• Large balance sheet and extensive experience with owner-occupier lending.
• Often a good fit for straightforward borrowers with strong equity.
• Can be competitive when there is a strong overall banking relationship.

Potential downside:

• Large-bank processes can sometimes be less flexible for unusual situations (for example, needing a temporary period with two properties).

ASB Bank

Why consider it:

• Generally known for good digital tools and a smooth online experience.
• Often competitive for families with stable income and good financial records.
• Worth comparing for fixed-rate packages and lending flexibility.

Potential downside:

• As with most major banks, policy-driven decisions may not always suit more complex situations.

BNZ

Why consider it:

• Strong home lending presence and a reputation for practical lending conversations.
• Worth checking if you need a tailored structure around buying/selling timing.

Potential downside:

• The right outcome can depend greatly on the individual lending manager and your circumstances.

Kiwibank

Why consider it:

• New Zealand-owned bank with competitive home loan products at times.
• Can be attractive if supporting a local NZ-owned institution matters to you.

Potential downside:

• May not always be the most flexible option for complex bridging scenarios.

SBS Bank or TSB Bank

Why consider them:

• Smaller lenders can sometimes provide more personal service.
• Worth including in a rate and service comparison.

Potential downside:

• Smaller institutions may have narrower lending policies or fewer specialised options.

For your specific situation: don’t overlook a mortgage adviser

Because you may need to settle on the new home before selling your current home, I would strongly consider using a mortgage adviser rather than approaching only one bank. A good adviser can:

• Compare multiple lenders.
• Structure a bridging loan or temporary lending arrangement.
• Help avoid selling pressure if your current home takes longer to move.
• Negotiate rates, cash contributions, and loan structure.

Dunedin has several established mortgage advisers, including MortgageMe, Mortgage Link Otago, and Loan Market Dunedin. Local advisers commonly work with multiple lenders and can be useful for more complicated moves such as buying before selling. MoneyHub NZ

Questions I’d ask any lender/adviser

1. Can you approve us for a new purchase before our current home sells?
2. What type of bridging finance would you use — open bridging or closed bridging?
3. How long can we comfortably carry two properties?
4. What happens if our current home takes 3–6 months longer to sell?
5. Can we split the loan (for example, fixed portions plus a floating/offset portion)?
6. What are the break fees if we sell sooner than expected?
7. What cash contribution or fee discounts are available?

My likely approach for a Dunedin family upgrade

I would:

1. Speak to one independent mortgage adviser first.
2. Get a lending assessment from your current bank.
3. Compare that against 2–3 alternatives (including at least one smaller lender).
4. Choose based on flexibility and risk management, not just a slightly lower interest rate.

If you share:

• approximate value of your current home,
• current mortgage balance,
• expected price range of the new home,
• household income type (salaried/self-employed),
• and whether you want to buy first or sell first,

I can help narrow down what type of lender structure is likely to suit you best.
MortgageMe, Mortgage Link Otago, Loan Market Dunedin

For a family in Wellington moving to a bigger home, I’d focus on lenders that can help you buy your next property before your current home sells, without putting too much pressure on your cash flow.

In New Zealand, this is often handled through bridging finance, sometimes combined with a new home loan and a temporary period where you carry both mortgages. The best lender for you will depend on your equity, income, existing mortgage, and how confidently you can estimate the sale price and timing of your current home.

My main recommendation is to compare the major banks with a good mortgage adviser, rather than choosing solely on the advertised interest rate. The flexibility of the lending structure can matter more than a small rate difference during a move.

The lenders I’d shortlist

These are the lenders I’d approach first for your situation, based on their published guidance on buying a new home before selling your existing one. This is a shortlist for discussions, not a claim that any one bank will approve you or offer the lowest rate.

1. ANZ New Zealand

First one I’d approach

Why: ANZ explicitly offers bridging finance and provides access to mobile mortgage managers. It is a sensible first conversation if you want to understand how much you can borrow before committing to your next home.

Ask about: The maximum bridging amount, repayment arrangements, and whether your existing fixed-rate loan can be transferred or restructured.

Official information: ANZ bridging finance. Bridging Finance

2. ASB

Why: ASB specifically discusses buying and selling at the same time, including using your new home as security while retaining your existing home loan. It also describes interest-only payments on bridging finance as a possible option.

Best fit if: You already bank with ASB, want to explore keeping your existing mortgage in place, or value having your existing and new lending considered together.

Official information: ASB buying and selling guide. Bridging finance - Buying & selling at the same time

3. BNZ

Why: BNZ explains bridging finance for up to 12 months, subject to approval, and outlines the evidence a lender may request, including realistic sale-price estimates and a backup plan if the sale falls short.

Best fit if: You want to plan carefully for the overlap between the two properties and understand what happens if your current home takes longer to sell.

Ask about: The maximum term, what happens if the property remains unsold, and whether your existing loan can move to the new property on its current rate.

Official information: BNZ bridging finance guide. How bridging finance worksMoving your mortgage when you move house

4. Kiwibank

Why: Kiwibank explicitly addresses buying your next home before selling your current one and has a next-home calculator to help assess the affordability of holding both properties.

Best fit if: You want another major-bank proposal to compare against ANZ, ASB and BNZ.

Official information: Kiwibank buying your next home. Buying your next home | Home loans

My practical approach would be to start with your current bank, then compare its proposal with at least two others. Your existing lender may be able to restructure or transfer parts of your mortgage, but the best option depends on your current fixed-rate terms and the full lending assessment.

What matters more than the headline interest rate

When you compare offers, ask each lender to confirm these points in writing:

• Total borrowing: How much can you borrow to buy the new home while still owning the current one?
• Monthly repayments: What would you pay each month if the old home took three, six or even twelve months to sell?
• Interest and fees: Is bridging interest charged on the full facility or the amount drawn, and are there establishment, valuation or legal costs?
• Existing fixed-rate loans: Can you retain your current rate, and would breaking or changing it incur an early repayment cost?
• Exit plan: What happens if your current home sells for less than expected or doesn't sell within the agreed period?
• Loan structure after the sale: Can the remaining mortgage be split across fixed and floating rates to suit your family's budget?

ANZ, ASB and BNZ all emphasise the need to assess affordability and the risks of carrying two properties. Bridging FinanceBridging finance - Buying & selling at the same timeHow bridging finance works

Should you use a mortgage adviser?

Yes — I would, particularly because you may need to own two homes temporarily.

An independent mortgage adviser can compare lenders' policies and loan structures, not just interest rates. Check which lenders they actually work with, whether they charge you a fee, and how their commissions work. The Financial Markets Authority explains what to ask and what a written recommendation should include. Mortgage adviceMortgages and home loans

Also, don't assume that a bank's approval for a normal mortgage means it will approve bridging finance. The bank needs to assess your ability to manage the temporary debt and the risks around the sale.

Let’s narrow this down for your family

I can make a much more useful recommendation if I know four things about your situation.

With those details, I can help you narrow the shortlist and identify which questions to take to each lender before you make an offer on the bigger home.