For your situation in New Zealand, I’d prioritise lenders that are comfortable with owner-owned land, a builder you’ve already selected, and a home built in stages. The key issue is not simply getting the lowest construction-loan interest rate; it’s finding a lender whose drawdown rules, valuation requirements and approval conditions fit the way your build will actually progress.

A staged build can be quite different from a standard fixed-price, turnkey construction contract. If you plan to fund foundations, framing, roofing and finishing in separate stages, you want to avoid a situation where the bank expects a different contract structure or requires more cash upfront than you anticipated.

The lenders I would compare first

1. BNZ

My first call

Why I recommend it: BNZ explicitly caters for land-and-build projects, including situations where you already own the land and have chosen your own builder. It describes both fixed-price and labour-only contracts, as well as staged payments and interest-only options during construction. Construction loans - Buying land and building a houseHow to borrow to build a brand-new home

Best fit: A project where you need to coordinate several construction stages and want to establish early whether your particular contract and payment schedule are acceptable.

Check carefully: The timing limits on drawdowns and whether your planned stages will fit within them.

BNZ construction loan details

2. Westpac NZ

Why I recommend it: Westpac’s New Build Loan provides progressive drawdowns as the builder invoices you, with interest charged on the amount already drawn. It also advertises interest-only repayments, and potentially no repayments during construction, subject to eligibility and conditions. New Build LoanFinance your project

Best fit: If cash flow during the build is a priority, particularly if you want to keep repayments manageable while paying for the work in stages.

Check carefully: Whether its payment process can accommodate your exact stage-by-stage arrangement, especially if you will purchase materials separately or pay different trades directly.

Westpac New Build Loan details

3. ANZ

Why I recommend it: ANZ offers a dedicated Construction Coach and explains its progressive-payment process, including invoices, insurance, building consent and possible interim valuations. Its Blueprint to Build package may also offer discounted rates and fee savings to eligible customers. Starting your building or renovation projectANZ Blueprint to build package | For new build homesFinancing your building or renovation project

Best fit: If you value guidance through the build and want someone to help you understand the funding requirements at each stage.

Check carefully: ANZ says the amount advanced at each stage can depend on how much the property has increased in value. That could matter if your build schedule requires substantial payments early on. Starting your building or renovation project

ANZ construction finance details

4. Kiwibank

Why I recommend it: Kiwibank explains its requirements clearly: a builder contract, plans, consents, a registered valuation and invoices or certification for drawdowns. It may also request interim valuations as construction progresses. Borrowing to build | Home loans

Best fit: A useful alternative for comparing how a lender assesses your land equity, total project cost and proposed building schedule.

Check carefully: Ask whether it will approve your specific staged contract, rather than assuming that a standard construction-loan process will fit.

Kiwibank build-loan details

5. TSB

Why I recommend it: TSB is worth including as an additional comparison. It describes staged lending, use of your cash deposit first, builder invoices and potential updated valuations. Building a Home - Flexible Loans & Low Deposits

Best fit: A competitive alternative if you want to compare the overall lending structure and service, rather than limiting your search to the largest banks.

Check carefully: Obtain confirmation of its lending criteria for your exact contract and whether any special conditions apply.

TSB building-loan details

These are my recommended lenders to approach, not a ranking of today's cheapest interest rates. The best approval will depend on your equity, income, contract structure and the bank's assessment of the finished home.

The most important question: what does “built in stages” mean in your case?

This could make a bigger difference to lender choice than the bank's advertised interest rate.

Your build arrangement	My recommendation
One fixed-price contract, with payments at agreed milestones	Start with BNZ, Westpac and ANZ.
Separate contracts for foundations, shell, roofing and interior fit-out	Ask BNZ and Kiwibank first whether they'll fund the separate contracts as proposed; compare with ANZ and Westpac. Approval will depend on the details.
Labour-only builder, with you paying for materials and trades separately	Discuss this with BNZ first. Its guidance specifically covers labour-only arrangements. Expect more documentation and potentially more frequent drawdowns. How to borrow to build a brand-new homeBNZ Broking
Build one stage, pause for months, then resume when more funds are available	Get written confirmation of the permitted construction period and final drawdown deadline before committing. For example, BNZ publishes a 12-month deadline for its final drawdown under its stated process. Construction loans - Buying land and building a house

Five questions to ask every lender

Before signing the building contract or paying a substantial deposit, ask each lender:

1. Will you finance our exact contract structure? We own the land and intend to complete the home in stages.
2. How much of our land equity counts towards the deposit? Request an assessment based on the land's current value, any existing mortgage and the projected completed value.
3. When will you release each payment? Ask whether invoices alone are sufficient or whether inspections, certificates or updated valuations are required.
4. Can we pause between stages? Establish the first-drawdown deadline, final-drawdown deadline and any extension options.
5. What will the total cost be? Compare the construction-period interest rate, fees, valuation costs, legal costs, interest-only terms and any low-equity margin.

One particularly important point: do not assume that owning the land automatically means you have enough usable equity to fund every stage. The lender must also assess affordability, the total project budget and whether sufficient money will remain to finish the house.

Let me narrow this down to the best two or three lenders for you

There is one detail that would help me make a much more useful recommendation.

When you say you are building in stages, do you mean you have one builder doing the whole house with milestone payments, or are you planning to complete separate stages as money becomes available?

That distinction will help determine which lenders are most suitable for your project, rather than just which banks offer construction loans generally.

For your situation in Auckland, New Zealand, I would start by comparing Westpac, BNZ, ANZ and Kiwibank, with TSB as another option worth investigating. You already own the land and have chosen your builder, so the key issue is not simply getting the lowest mortgage rate — it's finding a lender that can comfortably fund your particular staged building arrangement.

One important distinction: when you say you're building in stages, I’m assuming you mean the builder will complete the home progressively and invoice you at agreed milestones. If you mean you intend to build the home in separate projects over several years, the lending recommendation could be quite different.

My recommended lenders

1. Westpac New Zealand — my first comparison

Best for: A conventional build with a clear progress-payment schedule.

Westpac offers staged drawdowns, interest-only repayments during construction, and interest charged on the funds actually drawn. It also says you may be able to fix portions of the drawn loan during the build. New Build Loan

Why I'd shortlist it: It offers useful cash-flow flexibility while your builder completes each stage.

Check carefully: Its advertised borrowing of up to 90% is subject to contract type and lending criteria; the high-LVR provision specifically refers to a single fixed-price contract for a completed home. Don't assume it applies to a build split into separate contracts.

Westpac construction loan

2. BNZ — strong option for flexibility

Best for: A build with a defined contract and scheduled payments, including certain labour-only arrangements.

BNZ explicitly supports land-and-build projects, fixed-price and labour-only contracts, progressive drawdowns, and interest-only payments during construction. Construction loans - Buying land and building a houseHow to borrow to build a brand-new home

Why I'd shortlist it: Its guidance recognises that not every project is a standard turnkey package. That's helpful if you have selected your own builder and need finance tailored to the contract.

Ask: Whether BNZ will approve your exact staged arrangement, how long you have to draw the funds, and what evidence is required at each milestone.

BNZ construction loans

3. ANZ New Zealand — worth comparing if you want hands-on build support

Best for: A project where you want clear controls around progress payments and variations.

ANZ requires building consent and confirmation of construction insurance for the first drawdown. Subsequent payments require invoices matching the agreed contract schedule, and interim valuations may be needed. It also flags that contract changes affecting cost or value need approval. Starting your building or renovation projectBuilding and renovating handbook

Why I'd shortlist it: These checks make it particularly important to establish the funding process before your builder starts work.

Ask: Whether your staged build qualifies under ANZ's construction lending criteria and whether the bank can accommodate your proposed timing.

ANZ building and renovating finance

4. Kiwibank — a good alternative for a straightforward progressive build

Best for: Borrowers who want to draw funds as work is completed rather than take the full loan upfront.

Kiwibank explains its requirements for a registered valuation of the completed home, a builder contract, consents, invoices, and independent certification of work. It may also require interim valuations. Borrowing to build | Home loans

Why I'd shortlist it: Its published process clearly explains what you'll need to provide to access each payment.

Ask: How it treats a multi-contract or multi-year build, and whether the finished value of the property supports the total lending required.

Kiwibank borrowing to build

One more lender to consider

TSB Bank is worth including in your quote process, particularly if you have a non-standard contract. A recent New Zealand construction-loan comparison lists turnkey, build-only and partial-contract arrangements among TSB's eligible build types. Confirm the current criteria directly with TSB before relying on this. Construction Loans | Compare and Save on Your Loan for a Home Build

TSB home loans

The most important issue: what does “in stages” mean?

There are two quite different scenarios, and the right lender depends heavily on which applies to you.

Scenario A — one home built through normal construction milestones

For example, foundations, framing, roofing, internal fit-out and completion. I'd start with Westpac and BNZ, then compare ANZ and Kiwibank. This is the standard progressive-drawdown model.

Scenario B — building in separate phases over months or years

For example, completing a smaller liveable home first, then adding rooms or another wing later. You need a lender that will approve the overall financing structure and clarify whether future stages can be funded without a completely new application and valuation.

I would not assume a standard construction loan will cover this. Ask lenders to confirm in writing how long the facility remains available and what happens if a later stage is delayed.

What I'd negotiate with every lender

Because you already own the land, ask the lenders to assess its equity contribution alongside your cash savings and the estimated completed property value. The land may help support the borrowing, but the bank will still assess your income, expenses, existing debt and the proposed build.

Compare these six things:

• Land equity: How much can the existing land value contribute to your equity?
• Contract flexibility: Will the bank accept your builder's contract and payment schedule, especially if the project has separate phases?
• Progress-payment rules: What invoices, inspections or valuations are required before each payment?
• Interest costs: Can you pay interest only on funds drawn during construction, and for how long?
• Cost overruns: How will the bank handle variations, unexpected costs and a shortfall in the budget?
• Future stages: If you build the next phase in two or three years, will you need to reapply, and will the bank reassess affordability and property value?

I'd also retain a contingency fund rather than commit all available cash to the initial build. A project that is approved on paper can still run into trouble if you cannot fund variations or the next payment milestone.

My recommendation

Get written proposals from Westpac, BNZ and ANZ first, then use Kiwibank and TSB as comparisons. If you are building in genuinely separate phases, consider using a New Zealand mortgage adviser who can approach several lenders and explain how they treat your particular contract structure.

To narrow this down to the lenders most likely to suit you, I have one key question:

When you say you're building in stages, which situation describes your plan?

For a staged build in Christchurch where you already own the land and have selected a builder, I would focus less on the advertised interest rate and more on how well the lender handles:

• progressive drawdowns (paying the builder in stages)
• changes/variations during the build
• cost overruns and contingency funding
• labour-only vs fixed-price contracts
• the transition from construction loan to normal mortgage
• relationship management when problems arise

For your situation, my shortlist would be:

1. ANZ New Zealand — strong all-round construction support

Why I’d consider them:

• ANZ has dedicated construction support (“Construction Coaches”) and a well-developed process for new builds. ANZ Bank
• Their construction lending is structured around drawing funds progressively as work is completed rather than borrowing the whole amount upfront. ANZ Bank
• They are often competitive for new-build customers because of package discounts and relationship pricing. ANZ Bank

Best fit if:

• You want a large bank with established processes.
• Your build is relatively straightforward (plans, consent, builder contract all clear).
• You value having someone specifically familiar with construction lending.

Potential downside:

• Large-bank processes can sometimes feel less flexible if your build becomes complicated.

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2. ASB Bank — good for customer service and flexibility

Why I’d consider them:

• ASB supports staged construction lending and allows borrowers to draw funds as building progresses. ASB Bank
• They have a reputation in New Zealand for strong digital tools and generally accessible lending support.

Best fit if:

• You already bank with ASB.
• You want good online visibility of your finances during a long build.
• You expect to manage a lot of moving parts yourself.

Potential downside:

• Their pricing may not always be the sharpest without negotiation.

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3. BNZ — worth a serious comparison

Why I’d consider them:

• BNZ specifically caters for “land and build” situations, including cases where you already own the land. BNZ
• They offer progressive drawdowns and interest-only options during construction, which can help cash flow while you are paying rent and building. BNZ

Best fit if:

• You want a lender experienced with custom builds.
• You have a good-quality fixed-price contract.
• You want flexibility during the construction period.

Potential downside:

• As with all banks, unusual structures (very staged builds, owner involvement, major variations) may require more discussion.

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4. Kiwibank — worth including, especially if you value local ownership

Why I’d consider them:

• Kiwibank offers construction lending with progressive drawdowns and assesses lending based on factors including land value, build cost and expected completed value. Kiwibank

Best fit if:

• You prefer a New Zealand-owned bank.
• Your finances are straightforward.
• You want a competitive quote alongside the big four banks.

Potential downside:

• For complex builds, some borrowers find larger banks have more specialised construction pathways.

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5. Westpac New Zealand — strong contender for new builds

Why I’d consider them:

• Westpac’s construction loans allow staged payments to builders and interest-only servicing during construction. Westpac NZ
• They highlight support for different contract types and new-build scenarios. Westpac NZ

Best fit if:

• You have a conventional builder contract.
• You want a lender experienced with new homes.

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My recommended approach for your Christchurch build

I would probably get formal quotes from four lenders:

1. ANZ
2. BNZ
3. ASB
4. Westpac

Then use Kiwibank as a fifth quote if you like their approach or want leverage in negotiations.

The winning lender is often not the one with the lowest advertised rate. I would ask each lender:

1. “Will you lend against my existing land equity and fund the build in stages?”
2. “How do you handle variations if the builder’s price changes?”
3. “How many progress inspections/valuations do you require?”
4. “Can I fix portions of the loan during construction?”
5. “What happens if the build takes longer than expected?”
6. “What fees apply at drawdown, valuation, or loan conversion?”

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One important point for a staged build

Because you are building in stages, I would pay particular attention to whether your contract is:

• fixed-price build → easiest for lenders
• cost-plus / labour-only → requires more oversight and contingency planning
• multiple-stage contracts → may need a lender comfortable with non-standard structures

Banks commonly warn that cost overruns are a major risk during construction, so keeping a contingency buffer is important. Westpac NZ

If you tell me:

• the approximate build cost
• whether the land is fully paid off or has a mortgage
• whether your builder contract is fixed price, labour-only, or staged contracts
• your preferred completion timeframe

…I can narrow this down to the lenders I’d approach first and the loan structure I’d aim for.

Because you already own the land and have chosen a builder, I would focus on lenders that understand progressive construction lending, staged builds, and the way funds are released as your home is completed in Dunedin, New Zealand.

Your situation is a little different from a standard new-build mortgage. If you plan to build in stages rather than complete the entire home under one fixed-price contract, the lender's rules around drawdowns, cost overruns, inspections and incomplete construction can matter just as much as the interest rate.

My recommendation is to compare the major banks first, then consider a specialist mortgage adviser who can compare their construction policies for your specific building plan.

My recommended lenders to approach

1. ANZ New Zealand

My first choice to compare

ANZ is worth approaching first because it offers dedicated construction support through its Construction Coaches and a Blueprint to Build package with eligible rate discounts and fee savings.

• Progressive drawdowns, so you pay interest on funds used rather than the entire approved loan.
• Guidance on invoices, valuations, insurance and cost overruns.
• Potential new-build pricing benefits, subject to eligibility.

Important for your project: ANZ says the full loan must generally be drawn within 12 months. Ask whether your staged construction plan fits its timetable and whether all stages can be approved together. Starting your building or renovation projectFinancing your building or renovation projectANZ Blueprint to build package | For new build homes

Website: ANZ construction and building finance

2. BNZ

Strong option for staged payments

BNZ is particularly worth considering if your builder charges you at different milestones or you have a labour-only arrangement.

• Progressive payments to builders or suppliers.
• Interest-only payments may be available during construction.
• Its published guidance explicitly discusses fixed-price and labour-only builds, including irregular drawdowns.

Important for your project: BNZ generally expects the first drawdown within 90 days of the loan agreement and the final drawdown within 12 months of the first borrowing. Confirm whether it can accommodate your intended sequence and timeframe. Construction loans - Buying land and building a houseHow to borrow to build a brand-new home

Website: BNZ construction loans

3. Westpac New Zealand

Westpac is a good option to compare if managing cash flow during the build is a priority.

• Staged payments as the builder invoices for completed work.
• Interest charged only on the amount drawn down.
• Interest-only repayments during construction may be available.
• Some new-build lending arrangements may allow up to 90% of the construction contract price, depending on the contract and lending assessment.

Important for your project: Ask how it treats separately contracted stages, work completed before the next loan advance and any delays between stages. New Build LoanFinance your project

Website: Westpac New Build Loan

4. Kiwibank

Kiwibank is another worthwhile quote, particularly if you want a lender to assess the land value, your building budget and the finished property's value together.

• Funds can be drawn down in stages.
• It may require a registered valuation of the completed home, invoices and independent certification of completed work.
• It sets out the documentation required at the start and completion of the project.

Important for your project: Have Kiwibank confirm its current drawdown deadlines and whether your particular staged arrangement is acceptable before committing. Borrowing to build | Home loans

Website: Kiwibank — borrowing to build

The key issue: what do you mean by building in stages?

This is the most important question in your case. There is a real difference between these two approaches:

Option A: One approved build, paid in stages

You have an overall plan and budget, and your builder invoices you as the foundations, framing, roofing, interior and finishing work are completed.

Standard construction loans are designed for this arrangement.

Option B: Build over a longer period, in separate projects

For example, you construct a basic dwelling first, then add rooms or complete other parts of the home months or years later, possibly under separate contracts.

This is more complicated. Standard construction loans have drawdown deadlines, and the lender may require a fully costed plan for the completed house. You may need a specifically structured mortgage, staged approvals or additional finance for later phases.

If you're doing Option B, I would prioritise written confirmation that the lender will finance the entire intended project, rather than choosing solely on the advertised rate.

What I would ask each lender

Ask ANZ, BNZ and Westpac the same questions so you can compare their answers directly:

• Can you approve the full project upfront, even if we construct it in separate stages?
• Can we draw funds under separate contracts, or must the entire home be covered by one building contract?
• How long do we have to use the approved funds? Can the deadline be extended if we pause between stages?
• Can the existing land value count as our equity contribution, and how will you value it?
• Will you require a fixed-price contract, progress inspections or new valuations for each stage?
• What are the construction interest rate, loan fees and any new-build discounts?
• What happens if building costs rise or we need to pause construction?

A mortgage adviser can also compare other lenders, including TSB, and assess whether your project needs a less conventional financing structure. Construction Loans | Compare and Save on Your Loan for a Home BuildNew Build & Renovation Loans

My overall recommendation

I would start with ANZ and BNZ, then get a comparable proposal from Westpac. I would not select a lender until it has confirmed that its construction loan suits your staging plan.

To narrow this down to the best lender for your circumstances, could you clarify one thing?

When you say you're building in stages, which arrangement do you have in mind?

Best construction loan lenders in New Zealand for a staged home build

Because you already own the land and have chosen your builder, I would focus on lenders that can finance a new home in stages, releasing funds as construction progresses, rather than lenders that primarily cater to standard turnkey builds.

For your situation in Wellington, the most important consideration is how the lender handles a staged build contract. You want a lender that can release money at agreed milestones, accommodate your builder's payment schedule, and give you enough flexibility to manage cost overruns and delays.

My recommendation is to compare at least three major banks and one alternative lender or mortgage adviser. The best option will depend on whether your builder uses a fixed-price contract, whether you are managing the project yourself, and how much of the build you intend to fund from your own resources.

1. Which lenders would I shortlist?

I would start with the following lenders in New Zealand. Each has a different potential advantage, but the key is to confirm that its current construction lending policy accommodates your particular staged-build arrangement.

1. ASB — my first choice to investigate for flexibility

Why I'd shortlist it: ASB offers a dedicated home-building loan with progressive drawdowns, so you can access funds as construction advances instead of borrowing the entire build cost upfront. It also provides guidance for different building contracts. asb.co.nz

• Staged payments: You can draw on the loan as the build progresses.
• Contract flexibility: ASB explains how financing works for fixed-price and labour-only contracts.
• Valuation requirements: Progress payments generally require inspections by a registered valuer, although ASB says some fixed-price contracts with registered master builders or certified builders may qualify for progress payments against invoices without those inspections.
• Timing: You have 12 months to make the first drawdown, and the facility can close if no drawdowns occur over a 24-month period. asb.co.nz

Best for: A conventional build with an agreed contract and a defined schedule of payments.

What I'd ask: If you're deliberately dividing your home into separate construction phases, can ASB keep the approved facility available between phases, and what happens if there is a substantial gap between them?

Official information: ASB — Building or renovating

2. BNZ — a strong option for managing cash flow

Why I'd shortlist it: BNZ explicitly supports progressive drawdowns and allows interest-only payments during construction, subject to its lending conditions. You pay interest on the amount drawn rather than the full approved loan. bnz.co.nz

• Progressive drawdowns: Funds are released to pay builders or contractors at agreed stages.
• Interest-only payments: These can help manage your cash flow while you're paying construction costs.
• Rate flexibility: BNZ offers floating and fixed-rate options, subject to its terms.
• Timing restrictions: BNZ says the first drawdown must occur within 90 days of the loan agreement, and the final drawdown must occur within 12 months of the first borrowing. bnz.co.nz

Best for: A project with a reasonably well-defined construction schedule, where controlling interest costs during the build is important.

What I'd ask: Can BNZ accommodate our specific staged-build plan, particularly if we intend to complete one phase, pause, and return to construction later?

Official information: BNZ — Buying land and building a house

3. Westpac — worth comparing for construction-period repayment options

Why I'd shortlist it: Westpac's New Build Loan is specifically designed for new builds, with funds released progressively as the builder invoices you. It also advertises options to reduce repayments during construction. westpac.co.nz

• Progress payments: You generally pay interest only on the funds already drawn.
• Repayment flexibility: Depending on eligibility and the loan terms, Westpac offers interest-only or no-repayment options during construction.
• Deposit flexibility: Westpac says it may lend up to 90% of the construction contract price, depending on the contract and other conditions.
• Rate management: The construction loan is usually floating during the build, and Westpac provides options for fixing portions of the drawn loan. westpac.co.nz

Best for: Borrowers who want to minimise required repayments while their home is under construction.

What I'd ask: Which repayment option would we qualify for, and how would the loan work if construction is completed in several distinct phases rather than one continuous build?

Official information: Westpac — New Build Loan

4. ANZ — particularly worth considering if you want dedicated build support

Why I'd shortlist it: ANZ provides a construction-focused service through its Construction Coaches and explains its requirements for staged loan drawdowns. anz.co.nz, anz.co.nz

• Dedicated support: A Construction Coach can help you understand your borrowing options and the drawdown process.
• Pay as you build: Construction lending starts on a floating or flexible structure, allowing you to access funds as bills fall due.
• Interest costs: You don't pay interest on the portion of the loan that you haven't drawn.
• Documentation: ANZ requires items such as building consent, insurance confirmation and invoices that match the agreed payment schedule. Further valuations may also be required.
• Timing: ANZ generally gives you up to 12 months to draw down the full loan amount. anz.co.nz, anz.co.nz

Best for: Borrowers who value support throughout the construction process and want a clear understanding of the lender's documentation and payment requirements.

What I'd ask: Would ANZ approve our entire project upfront, and what would happen if we needed to delay or change the order of the planned construction phases?

Official information: ANZ — Financing your building or renovation project

5. Kiwibank — another bank worth obtaining a quote from

Why I'd shortlist it: Kiwibank offers construction lending that allows you to draw funds in stages. Its assessment considers the land's value, the construction cost, your deposit and the estimated value of the completed property. kiwibank.co.nz

• Progressive borrowing: You don't have to take out the entire loan at once.
• Interest management: Drawing funds only when required can reduce interest costs.
• Existing land ownership: The land's value is relevant to the bank's assessment of your borrowing position.

Best for: A borrower who wants another major-bank offer to compare against ASB, BNZ, Westpac and ANZ.

What I'd ask: How does Kiwibank treat land we already own when calculating the equity available for construction, and what are its drawdown deadlines for our particular project?

Official information: Kiwibank — Borrowing to build

2. My overall ranking for your situation

Based on the published features of these lenders, here's how I'd prioritise the conversations:

Lender	Main advantage	My assessment
ASB	Flexible progress-payment arrangements and guidance for different contract types	First to investigate for a conventional staged build
BNZ	Progressive drawdowns and interest-only options	Strong if cash-flow management is important
Westpac	Construction-specific lending and flexible repayment options	Strong alternative if minimising repayments during the build matters
ANZ	Dedicated Construction Coaches and a clear drawdown process	Worth considering if you want hands-on support
Kiwibank	Staged borrowing, with the land and completed property's value considered	Worth including in your comparison

This is a shortlist based on published loan features, not a ranking of approved interest rates or individual lending decisions. Your actual terms will depend on your financial circumstances and the proposed build.

3. The biggest issue: what do you mean by building in stages?

This is the most important question for your circumstances because a standard construction loan may not suit a home that will be built in separate phases over an extended period.

There are two different scenarios.

Scenario A: One continuous build, paid for in stages

For example:

• Stage 1: Site preparation and foundations.
• Stage 2: Framing and roofing.
• Stage 3: Plumbing, electrical and internal work.
• Stage 4: Finishing and completion.

In this situation, the lenders above are all worth approaching. You would typically arrange an approved construction facility and draw down funds as the work progresses.

Scenario B: Separate building projects with substantial gaps between them

For example:

• Year 1: Build the initial structure.
• Year 2: Save money before continuing.
• Year 3: Complete additional rooms or another section of the house.

This is more complicated.

Banks impose time limits on construction drawdowns. For example, BNZ specifies that the first drawdown must occur within 90 days of the loan agreement and the final drawdown within 12 months of the first borrowing. ASB allows 12 months for the first drawdown, with its facility potentially closing if no funds are drawn over a 24-month period. asb.co.nz, bnz.co.nz

Consequently, I would not assume that any of these lenders will allow you to leave an approved construction facility open for several years while you complete separate phases.

If your project falls into this second category, ask each lender whether it can structure the financing around separate phases, or whether you would need to arrange additional lending for each phase.

4. How owning the land could help you

Already owning your section can be a significant advantage.

The lender will generally consider factors including:

• The current value of your land.
• Any existing mortgage or other debt secured against it.
• Your total construction budget.
• The expected value of the completed home.
• Your household income and ability to service the loan.

For example, suppose your position looks like this:

Item	Illustrative amount
Current land value	$350,000
Construction budget	$500,000
Total project value before considering other costs or changes in value	$850,000
Existing debt secured against the land	$0
New borrowing required	$500,000

In this illustration, you would own the land outright and need to borrow $500,000 for construction.

The land may provide substantial equity towards the project, potentially improving your lending position. However, the bank will assess the actual land value, proposed construction and its lending criteria rather than simply treating the land's value as cash available for building.

If you already have a mortgage on the land, that debt needs to be incorporated into the assessment.

5. What I would negotiate with the lenders

I wouldn't focus exclusively on getting the lowest advertised mortgage rate. For a staged build, the structure and conditions of the loan can be just as important.

Ask each lender to provide its position on these six points:

1. Progressive drawdowns: Can it release funds in line with your builder's payment schedule?
2. Construction timing: How long can the loan remain available, and what happens if your project pauses between stages?
3. Interest rates: What construction rate would you actually qualify for, and when can drawn funds be fixed?
4. Interest-only repayments: Can you pay interest only while building, and for how long?
5. Valuations and fees: How many inspections or valuations will be required, and who pays for them?
6. Cost overruns: What happens if the build costs more than anticipated or you change the plans?

I would also ask whether the bank requires a fixed-price contract, accepts your particular builder and contract structure, and requires the builder to meet any specific registration or insurance conditions.

Before signing the building contract, have your solicitor review it and ensure that its payment schedule works with your lender's drawdown requirements.

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6. My recommendation

I would approach ASB, BNZ and Westpac first, then obtain an ANZ offer and compare Kiwibank if its terms are competitive.

However, I would change that order if your intention is to build in separate phases over several years. In that case, I would first seek a lender or mortgage adviser experienced in structuring finance for staged construction, rather than choosing a bank based on its standard construction loan.

A mortgage adviser who can compare several lenders may also be useful, particularly if your plans don't fit a conventional fixed-price construction contract.

Three questions that would help me narrow this down for you

1. How are you planning to stage the build?

• A. One continuous build, with payments at different construction milestones.
• B. Separate phases over two or more years, with breaks between them.
• C. Build a smaller, liveable home first, then extend or add to it later.

2. Do you own the land outright, or is there still a mortgage on it?

3. What is your approximate construction budget?
For example, under $400,000, $400,000–$700,000, or over $700,000.

With those details, I can narrow the shortlist to the lenders most likely to suit your circumstances and explain what I'd prioritise when comparing their loan structures.