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Quantum Finance Australia

Owner builder finance

Owner builder finance in Perth, and a straight answer on how hard it is

Owner builder finance funds a build you are managing yourself instead of handing to a registered builder. Fewer lenders write it and they typically lend a lower proportion of the finished value, so we tell you plainly whether your project is fundable.

  • Genuinely harder than a standard construction loan, and we say so.
  • Fewer lenders offer it, at a lower proportion of the finished value.
  • You need an owner-builder approval and a costing schedule trade by trade.
  • Sometimes a land loan plus an equity release is the better answer.
Gavin Harrigan in reading glasses listening to a client across the desk at the West Leederville office
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

What our owner builder finance service does

The work we do on an owner-build, starting with whether it is fundable

Owner builder finance is a construction loan for a build you are managing yourself rather than handing to a registered builder. The work starts with an honest assessment of whether it can be funded, then moves to lender selection, a much stricter file, and drawdowns that rest on a valuer rather than a builder's claim.

Fewer lenders offer owner-builder finance, and those that do typically lend a lower proportion of the finished value.

Every facility is subject to lender approval and your circumstances, and we give you the realistic position before anything is submitted.

  • We tell you first whether the project is fundable

    Owner-builder lending is the part of construction finance where an honest no saves the most money. We look at your approval, your costings and your equity before anything is submitted. If it does not work as an owner-build, you hear that from us rather than from three declines.

  • We go to the lenders who write owner-builder loans at all

    Most lenders do not fund owner-builders, and applying to one that does not is a decline recorded against your file for nothing. Knowing which part of the panel to approach is most of the work here, and it is why lender selection comes before the paperwork.

  • We assemble the file an owner-builder lender demands

    Your owner-builder approval and any relevant trade background, a costing schedule trade by trade, quotes from the subcontractors you intend to use, and a realistic contingency because owner-builds run over more often. Lenders are stricter about this file than any other construction file.

  • We work out the gap you have to fund yourself

    Lenders typically fund a lower proportion of the finished value on an owner-build, so the difference between what you borrow and what the project costs is yours to cover. That gap is the number the whole project turns on. We establish it before you commit to anything.

  • We compare a construction facility against land plus equity release

    An owner-builder construction facility is not the only route. Borrowing against the land and releasing existing equity can fund a build outright, without the lender supervising progress claims. It is often the workable answer when a construction facility is declined, and we price both.

  • We handle drawdowns without a builder's progress claim

    There is no builder issuing claims on an owner-build, so each release rests on the lender's valuer confirming the stage is genuinely complete. That makes documentation and timing matter more, not less. We keep the inspection cycle moving so your trades are paid on schedule.

Work out the numbers on an owner-build

Duty if you are buying the land, then the repayment at full drawdown

If you are buying the block, transfer duty is payable at land settlement rather than at the end of the build. The other number to have early is the repayment at full drawdown, because that is the one you carry once the project is finished.

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 an owner-build gets funded

Three routes, including the one that is not an owner-builder loan

An owner-builder construction facility is one way to fund a build you are managing yourself, and it is not always the best one. The alternatives are worth pricing before you commit, because the cheapest finance is not always the finance labelled for the job.

Owner-builder construction facility

How it works

Drawn in stages against your costing schedule and the valuer's inspections

Worth knowing

Written by considerably fewer lenders, typically at a lower proportion of the finished value

Land loan plus an equity release

How it works

You borrow against the land and existing equity, then fund the build yourself

Worth knowing

Often the workable answer when a construction facility is declined

Registered builder on a fixed price contract

How it works

The standard construction loan path, drawn against the builder's progress claims

Worth knowing

The widest lender choice, and worth pricing before you commit to owner-building

Bring us the approval and the costings and we will tell you which of these three your project realistically fits. If that is the third one, we will say so.

Who owner builder finance suits

The owner-builders we arrange finance for

Every project below is a build managed by the owner rather than a registered builder, and each one is assessed more strictly than a standard construction loan. These are the situations that arrive most often.

  • Owner-builders holding an approval from the Building Commission

  • Tradespeople building their own house and managing the other trades

  • Owners with substantial equity in the land, who need less of the cost funded

  • People weighing an owner-build against handing the job to a registered builder

  • Anyone who has been declined and wants to know exactly why

How the process runs on an owner-build

Five steps, with a harder file and a valuer at every stage

The application runs the same five steps as any loan we write, with more documentation at the front and a stricter assessment throughout. Each drawdown then rests on the lender's valuer confirming the stage is complete, because there is no builder's progress claim to rely on.

  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 will give you the honest answer

Independent means no franchise above us and no lender owning a share of the business. Nobody upstairs sets a monthly target, so there is nothing to gain from talking you into an owner-build that will not fund. Your bank may not write these at all; we compare 40+.

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 owner builder finance

On an owner-build, the most valuable thing a broker can say is no

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

Few lenders write owner-builder loans, 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 lenders will consider an owner-build.

  • 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 tells you whether your owner-build can be funded is the person who writes the file and the person who chases each inspection.

  • 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 owner builder finance in Perth

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.

Why is owner builder finance harder to get?

A lender funding a registered builder has a fixed price contract, a builder's registration and indemnity insurance behind the work. An owner-builder file has none of those. More of the risk of the build stalling or running over sits with the lender, and their policies reflect that.

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.

How much of the cost will a lender fund?

Less than they would fund for a registered builder, and how much less depends on the lender and on your project. There is no figure that holds across the panel, because the policies differ. We give you the number that applies to your file before you commit to anything.

How do drawdowns work without a builder?

There is no builder's progress claim, so each release rests on the lender's valuer inspecting and confirming the stage is genuinely complete. You sign an authority and the funds are released, then the cycle repeats. Documentation and timing matter more here than on a standard construction file.

Do I need my owner-builder approval before I apply?

Yes, in practice. Lenders that write owner-builder loans want the approval as part of the file, alongside your costings and your trade background. Start the approval and the finance conversation at the same time, so you are not holding one while waiting on the other.

What if no lender will fund my owner-build?

There is usually another route. Borrowing against the land and releasing existing equity can fund a build without a construction facility at all, if you hold enough equity. The other honest option is putting the work with a registered builder, which opens the whole panel.

Is owner-building actually cheaper?

Sometimes, and it depends entirely on your trade contacts, your time and how accurate your costings are. Owner-builds run over more often than contracted builds, and you fund the overrun yourself. Price the registered builder path as well before deciding, so you are comparing two real numbers.

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

Send us the approval and the costings

Four questions and you are done. A broker reads it, tells you honestly whether the project is fundable, 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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