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Quantum Finance Australia

Construction loans Perth

Construction loan broker in Perth, for a loan drawn down stage by stage

Quantum Finance arranges construction loans across Perth that pay your builder in stages as the house goes up, with interest charged only on what has been drawn, and we check the project against real lender policy before you sign the building contract.

  • New builds, knock-down-rebuilds and owner-builder projects.
  • Drawn down in stages, with interest only on what has been drawn.
  • Lenders assess the land and the finished value together.
  • Heavier paperwork than a home loan, and the timing matters more.
Justin Richardson at his desk in profile, hands on the keyboard, reading something on the monitor in front of him
Years broking
21+Years broking
Loans settled
$1B+Loans settled
Credit licence
ACL 389083Credit licence
Lenders compared
40+Lenders compared

Our awards and recognition

Awarded by the people who see every broker’s numbers
  • Diamond Club

    2026

    Money Quest Group

  • Diamond Club

    2025

    Money Quest Group

  • Diamond Club

    2024

    Money Quest Group

  • Mortgage Broker of the Year

    2023/24 — National, highest dollar volume settled

    Southern Cross Broker Network

  • Excellence in Finance, Gold

    2021

    PLAN Australia

  • Excellence in Finance, Gold

    2020

    PLAN Australia

  • Hall of Fame

    Valued partner, 15 years

    PLAN Australia

  • Elite Broker

    2021

    Broker Value Proposition

  • Premium Broker

    ANZ

  • Individual Excellence Award

    2016

    Specialist Finance Group

  • Sales Excellence Award

    PLAN Australia

  • Sales Master Award

    PLAN Australia

  • Top 100 Brokers

    Four times

    Australian Broker

Current rate

5.99% p.a.6.02% comparison rate

Variable, owner occupier. Principal and interest, from our lender panel.

Indicative only, as at August 2026. The rate you are offered depends on your circumstances and is subject to lender approval.

What our construction finance service does

The work we do on a construction loan, from contract to conversion

A construction loan pays your builder in stages as the house goes up, rather than handing over the full amount at settlement. The paperwork is heavier than a standard home loan and the timing matters more, because a stalled build costs money every day.

Lenders assess the land and the finished value together, using your fixed price building contract and approved plans.

Every facility is subject to lender approval and your circumstances, and we tell you where a project sits before anything is submitted.

  • We check the project before you sign the building contract

    Sign a fixed price contract, then find out you cannot fund it, and you may be exposed to the builder for the deposit. We confirm the numbers against real lender policy first, and tell you how long to make the finance clause in the contract.

  • We assemble the paperwork a construction lender demands

    Construction files need more documentation than a purchase and lenders are strict about it: the signed fixed price contract, council or shire approval and the building permit, final plans matching the contract exactly, the builder's registration and indemnity insurance, and the progress payment schedule.

  • We size the loan against the land and the finished value together

    The lender values the property as if complete, from the plans and the contract. Anything you plan to do outside that contract is generally not counted, and landscaping, driveways, fencing, retaining and window treatments are the usual omissions. We flag those before they arrive at the end.

  • We manage each drawdown as the build goes up

    Before each release the lender usually sends a valuer to confirm the stage is complete. You sign an authority, the lender pays the builder, and the drawn balance increases. We keep that cycle moving, because a stalled drawdown stalls the site.

  • We plan for the repayment climb and the completion deadline

    You pay interest only on what has been drawn, so the repayment rises with every stage and the last months cost considerably more than the first. Construction loans also carry a time limit for finishing the build, and an extension has to be requested rather than assumed.

  • We convert and review the loan once the build is finished

    At practical completion the facility converts to a normal principal and interest home loan. That is the point to review the rate and the structure, and we diarise it rather than leaving you on the product you started with.

Work out what the build costs to fund

Duty on the land, then repayments on the finished loan

A build has two numbers worth knowing early: the transfer duty on the land, which is payable at settlement of the land rather than at the end of the build, and what the loan repays at once the final drawdown is made.

Work out your WA stamp duty

The dutiable value. Usually the contract price, or the market value if that is higher.

Who is buying

First home buyer rates apply only if nobody on the contract has owned a home in Australia before, and you move in.

What you are buying

Foreign buyers pay an extra 7% of the dutiable value on residential property in WA.

Rates as at 10 August 2026, source: RevenueWA.

Estimated duty payable

$24,890

Scale applied
General rate
Transfer duty
$24,890
Duty at the general rate
$24,890

This is an estimate of transfer duty only, on the 10 August 2026 RevenueWA scale. It does not include Landgate transfer or mortgage registration fees, settlement agent fees, or the off-the-plan concession. RevenueWA assesses the final figure.

Talk through your purchase costs

Each tool has a page of its own explaining every figure it uses: stamp duty calculator wa and home loan repayment calculator.

How house and land is funded

Four build structures, and how the finance works on each

House and land packages come in two shapes, and the difference changes both your finance and what you pay in transfer duty. Two contracts is the more common structure in Perth's growth corridors, where you settle the land first and start paying that loan while the build proceeds.

Two contracts, land and build

How it is funded

Land settles first, then a construction facility funds the build

Worth knowing

Duty is generally assessed on the land value, not the finished house

One contract, turnkey

How it is funded

Funded like a standard purchase, settling on completion

Worth knowing

Simpler, though duty is usually assessed on the whole package

Land you already own

How it is funded

Equity in the land can contribute towards the deposit

Worth knowing

A current valuation is needed, and land values move

Off the plan

How it is funded

Settles on completion, with valuation risk at that point

Worth knowing

A long settlement means your circumstances get reassessed

Knowing how a build is funded does not hurt. Do not stress about the mechanics — we set the facility up around your builder's contract and walk you through each drawdown as it comes.

Who construction finance suits

The builds we arrange finance for

Every project below is funded progressively against a valuation of the finished home. These are the situations that arrive most often.

  • Buyers building a new home on land they have bought or already own

  • Owners knocking down and rebuilding on an established Perth block

  • Investors building a rental or a duplex on a subdivided lot

  • Owner-builders holding an owner-builder approval

  • Anyone on a house and land package who wants the finance checked properly

How our construction loan process works

Five steps, then a drawdown at every stage of the build

The application runs the same five steps as any loan we write. What follows approval is the part unique to a build: a progress claim, a valuer, an authority and a payment, repeated at each stage.

  1. Start an application

    You send us the basics and we work out what you could borrow and which lenders will look favourably at your situation.

    What you need

    Income, debts, deposit

    Read this step in full: Start an application
  2. Get pre-approved

    We put your file to the lender that fits and bring back a pre-approval in writing, subject to lender approval and your circumstances.

    What we do

    Match the lender to your file

    Read this step in full: Get pre-approved
  3. Get officially approved

    Once your offer is accepted, the lender orders its valuation and issues formal approval.

    What we do

    Chase the lender, so you do not have to

    Read this step in full: Get officially approved
  4. Prepare for settlement

    We go through the loan documents with you before you sign anything, then coordinate the lender and your settlement agent.

    What you need

    Your questions, asked early

    Read this step in full: Prepare for settlement
  5. Stay up to date

    After settlement we keep the loan under review as rates move and your circumstances change.

    What we do

    Review it, and tell you first

    Read this step in full: Stay up to date

Step 1 of 5

About our independent mortgage brokers

The brokers who fund your build

Independent means no franchise above us and no lender owning a share of the business. Nobody upstairs sets a monthly target, so a build goes to the lender whose construction policy actually fits it. Your bank offers one construction product; we compare 40+ lenders.

Gavin Harrigan has been broking from West Leederville since 2005. Today it runs on a small team, Gavin Harrigan, Justin Richardson and Xavier Prescott, each with their qualifications on the page. You deal with the person who writes your loan, before settlement and after it.

The work runs from a first home loan, through refinancing and investment lending, out to construction, small developments and commercial property. Same broker, whichever end of that you are at.

  • VerifiedBroking since 2005
  • VerifiedOver $1 billion in loans settled
  • VerifiedAustralian Credit Licence 389083
  • VerifiedMoneyQuest accredited
  • VerifiedMember of the Finance Brokers Association of Australia (FBAA)
  • Verified40+ lenders on the panel

Fifteen minutes is usually enough to tell you where you stand. No cost, no obligation, and any lending is subject to approval and your circumstances.

The Quantum Finance broking team at their West Leederville office in Perth
Gavin Harrigan at his desk at the Quantum Finance office in West Leederville, industry awards on the wall behind him

Why choose us for construction finance

A build has one shot at the right lender, and it is before you sign

Every point below is a consequence of how this business is owned, not a slogan about service.

  • Included

    No franchise, no head office quota

    We do not pay a franchise fee, so nobody upstairs sets a monthly target for us to hit. That removes the main reason a broker recommends the wrong loan.

  • Included

    No lender owns a share of us

    The banks have no stake in this business and no claim on where files go. Your bank has one loan to sell you. We do not.

  • Included

    40+ lenders, one shortlist

    We compare 40+ bank and non-bank lenders, then explain why the shortlist looks the way it does. Policy differences decide more applications than rate does.

  • Included

    We will tell you when the answer is no

    If refinancing does not actually save you money, we say so and you leave the loan where it is. A wrong loan costs more than the fee it earns.

  • Included

    The same broker after settlement

    You keep dealing with the person who wrote the loan. We review it as rates and your circumstances change, not once and then never again.

Book a 15-min chat

What our clients say

In their words, not ours

Reviews left by people we have settled loans for, pulled straight from the platform they were written on.

Our construction lender panel

Construction policy differs by lender, so we compare 40+

Major banks, second-tier banks, and non-bank lenders who will look at a build the majors will not. MoneyQuest gives us access to the panel. 21+ years of writing loans on it tells us which lender to use.

  • ANZ
  • Commonwealth Bank
  • NAB
  • Westpac
  • St.George
  • Bankwest
  • Suncorp Bank
  • ING
  • Citi
  • Macquarie
  • AMP
  • ME Bank
  • P&N Bank
  • Firstmac
  • Homeloans
  • La Trobe Financial
  • Liberty
  • Pepper Money
  • Bluestone
  • PLAN Lending

A selection of the lenders we are accredited with. Ask us who else is on the panel for your situation.

Meet our Perth construction finance brokers

You get a broker, not a call centre

Three people, all named, all reachable. The person who arranges your construction loan is the person who chases each drawdown and the person who reviews the loan after it converts.

  • Gavin Harrigan, Managing Director of Quantum Finance Australia in Perth

    Gavin Harrigan

    Managing Director

    Broking since 2005, four-time Top 100 broker and a PLAN Australia Hall of Fame member.

    • Bachelor of Commerce, Applied Finance and Commercial Law — Curtin University
    • Diploma of Finance and Mortgage Broking Management — AAMC Training Group
    • PLAN Australia Hall of Fame member
    • Elite Broker status
    • Top 100 Brokers, four times
    Read profilefor Gavin Harrigan
  • Justin Richardson, Loan Consultant at Quantum Finance Australia

    Justin Richardson

    Loan Consultant

    Business and law background, and a habit of making the process feel simple.

    • Bachelor of Commerce, Business Law and Marketing — Curtin University
    • Bachelor of Laws (in progress) — Murdoch University
    Read profilefor Justin Richardson
  • Xavier Prescott, Loan Consultant at Quantum Finance Australia

    Xavier Prescott

    Loan Consultant

    Fresh qualifications, a competitor's discipline, and a lot of patience.

    • Diploma of Finance and Mortgage Broking Management
    Read profilefor Xavier Prescott

Common questions about construction loans in Perth

How does a construction loan differ from a normal home loan?

The funds are released in stages as the build progresses rather than in one amount at settlement. You pay interest only on what has been drawn, so repayments climb with each stage. Once construction finishes, the loan converts to a standard principal and interest home loan.

Do I pay interest on the whole loan while building?

No, interest applies only to the balance drawn down so far, so early stages cost far less than later ones. Most lenders also allow interest-only repayments during construction. Budget around the repayment at full drawdown, because that is what you face in the final months.

Can I get a construction loan as an owner-builder?

It is possible, though considerably fewer lenders offer it and they typically lend a lower proportion of the finished value. You need an owner-builder approval, a detailed costing schedule and evidence you can fund any shortfall. We will tell you honestly whether your project is fundable.

What happens if my builder goes into administration?

The drawn portion of your loan remains payable and you are left to complete the build with another builder. Indemnity insurance may cover part of the loss, subject to the policy. This is why builder selection and a sensible contingency matter as much as the interest rate.

Does the loan cover landscaping and driveways?

Usually only if they are inside the fixed price building contract, because the lender values the property from that contract. Landscaping, fencing, driveways, retaining and window treatments are commonly excluded. They arrive at the end, so budget for them separately from the start.

Can I use equity in my land as the deposit?

Often yes, if you already own the block and it has been valued. Equity in the land can contribute towards or cover the deposit on the construction facility. How much a lender will recognise depends on a current valuation and on your serviceability, subject to approval.

How long can a construction loan run for?

Lenders set a period for the build to be completed, and it varies between them. If your builder runs over, an extension can usually be arranged, but it needs to be requested rather than assumed. We flag the deadline early so it does not become urgent.

Should I get finance before signing a building contract?

Speak to us before you sign. A fixed price contract commits you, and finding out afterwards that the numbers do not work can put your deposit at risk. We check the project against real lender policy first, and advise on the finance clause to include.

What are the drawdown stages on a construction loan?

Most residential contracts in Western Australia use five, though builders name them differently. The deposit is paid on signing, usually from your own funds. Base or slab is released once the footings and slab are down. Frame follows when the frame is up and inspected. Lock-up covers roof, external walls, windows and doors, and is typically the biggest single stage. Fit-out and practical completion covers internal fixtures, cabinetry and finishes, then the final payment.

What documents does a construction lender need?

A fixed price building contract signed by both parties, council or shire approval and the relevant building permit, final plans and specifications matching the contract exactly, your builder's registration and their indemnity insurance certificate, the progress payment schedule from the contract, and quotes for anything outside the contract that you intend to add.

What does it cost me while the house is being built?

Interest on the drawn balance, which rises with each stage, plus progress payment or drawdown fees and any valuation fee the lender charges at each stage. You also keep paying your rent or your existing mortgage for the duration, and any costs outside the building contract come out of your own funds.

How does a knock-down-rebuild work?

You are demolishing the lender's security before building the new one, so lenders value the land as vacant and then value the property as if complete. Demolition sits outside most building contracts, along with service disconnection and any asbestos removal. Budget for where you will live during the build, and for site works on a sloping block. Equity in the existing property often funds a good part of the project.

What does an owner-builder have to supply?

Your owner-builder approval from the Building Commission and any relevant trade background, a detailed costing schedule trade by trade, quotes from the subcontractors you intend to use, a realistic contingency because owner-builds run over more often, and evidence you can fund the gap between what you borrow and what it costs. Some owner-builders are better served by a land loan plus an equity release than by a construction facility.

The information on this page is general in nature and does not take into account your objectives, financial situation or needs. Any figures shown are estimates only. Lending is subject to approval, and to the lender's terms, conditions, fees and charges. Consider whether the information is appropriate for you before acting on it.

Get in touch

Talk to us before you sign a building contract

Four questions and you are done. A broker reads it, checks the project against real lender policy, and rings you back on the number you give us.

Would rather just talk?

Ringing is quicker than waiting for us to ring you, and you get a broker rather than a queue.

1300 813 113

Tell us what you need

Four details, about twenty seconds. We ask the rest on the call, where you can ask us things back.

An Australian mobile or landline. Overseas? Give us the number you use at home and we will work around the time difference.

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