Factory Extension: Development Finance or Loan Top-Up?
Factory Extension Finance (2026) | Switchboard Finance
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Development Finance · Factory Extension · Manufacturing
Factory Extension: Development Finance or Loan Top-Up?
Two paths lead into the same factory extension. One is a dedicated development line that funds the build in stages. The other is a top-up of the commercial property loan you already hold. Here is how a lender reads each, and how to tell which one fits your build.
Quick Answer
Extending a factory comes down to two funding paths: a dedicated development finance line that funds the build in stages, or a top-up of your existing commercial property loan. Which one fits depends on the build, your equity and your exit.
Two paths into the same factory extension
Most factory extensions can be funded one of two ways, and the right answer is set by the build, not the brand of loan. The first path is a dedicated development finance line that funds the construction itself in stages. The second is to lift your existing commercial property loan, drawing on the equity already sitting in the premises. Both end with a bigger factory; they get there very differently.
The distinction that matters most is what the lender is actually funding. A development line is built to fund the build, not the borrower, so it is sized against the cost and the finished value of the project. A top-up leans on the value and the cash flow you already have. In deals I've seen, owners reach for whichever sounds simpler, when the better question is which one matches the scale of what they are putting up. For the mechanics behind the construction path, our explainer on how development finance works is the place to start.
If you want the wider context for where this sits in a manufacturer's funding mix, the Manufacturing Hub maps the lanes, and the manufacturing loan pack lays out the documents a lender will want either way.
Development finance: fund the build, not the borrower
A development line is the instrument built for construction. Rather than handing over a lump sum, it releases money through staged drawdowns against certified progress, so each advance lands as the build reaches a checked milestone. That keeps interest costs down, because you only carry what the project has actually drawn, and it gives the lender comfort that the money is going into the slab, the steel and the fit-out rather than anywhere else.
The assessment is the second big difference. A development facility is sized on loan-to-cost rather than income servicing, which means the lender looks at total development cost and how much of it they will fund, with your equity covering the gap. Loan-to-cost ratios typically vary by lender, and the stronger your contribution, the more room you have on terms. This is the path that suits a structural extension, a new bay, or a build large enough that funding it from working capital would strangle the business.
Topping up the commercial property loan you already hold
The second path skips the construction facility entirely. If the premises already carries useful equity, you may be able to top up the existing facility or open a development line as a straightforward increase, drawing on what the property is now worth. A top-up is assessed much like the original commercial property loan: the lender reads servicing and the current loan-to-value position, then advances against the headroom.
This is usually the faster route for a modest extension, because there is no project to certify and no staged release to manage. The trade-off is ceiling. A top-up is capped by the equity already in the building, so a larger build can run past what the existing facility can stretch to. Where a top-up falls short of the costed build, that is exactly where these deals usually land back at a development line. The manufacturing loan pack sets out what a top-up assessment will ask for.
Side by side: a development line versus a top-up
The two paths diverge across nearly every dimension a credit team looks at. This is the comparison I run with a manufacturer before we pick a lane.
Neither column is the winner in the abstract. The development line wins when the build is big enough to need staged funding; the top-up wins when the equity is already there and the extension is contained.
Faster or slower: which path moves at the speed you need
The speed question is really an equity question. A top-up moves fast when the building already carries the headroom; it slows or stalls the moment the costed build runs past that equity and a project has to be assessed instead.
Faster: a top-up usually clears
- The premises carries clear, built-up equity
- The extension is modest relative to the property value
- Business servicing comfortably covers the larger facility
- No staged construction certification is needed
Slower: you likely need a development line
- The build is structural and runs past existing equity
- Funding is needed in stages as the work progresses
- The finished value, not today's value, carries the deal
- The project needs costings and an exit to be assessed
What the credit team weighs before it picks a lane
Whichever path you lean toward, the credit team weighs the same handful of things first: how much equity sits in the premises, what the finished build is worth, and how the facility is repaid. On a development line that last point is decisive, because the exit sets the term. If the plan is to hold and operate from the larger factory, the exit is a refinance onto a standard commercial facility once the build is done, and the lender will want to see that the finished, larger premises supports it. The gross realisation value and your exit strategy are read together.
Where a build opens a short equity gap before the facility is in place, that is a private or caveat conversation, not a construction one; our private lending page covers that narrow case. For the policy backdrop on Australian manufacturing investment and the support measures sitting around it, the Government's manufacturing industry overview is a useful reference. Specialist funders can return indicative terms in roughly 24 to 48 hours, varies by lender, but the full picture still rests on the build, the equity and the exit lining up.
Extending a factory is a choice between two instruments, not two brands. A development line funds the build itself through staged drawdowns and is sized on loan-to-cost, which suits a larger structural extension. A top-up of your existing commercial property loan leans on equity you already hold and moves faster, which suits a contained build. The deciding factors are the scale of the work, the equity in the premises and how the facility is repaid.
Key takeaway: Size the build against your equity first; if the project outgrows the equity, the development line is usually the right lane.Frequently Asked Questions
Whether you need development finance to extend your factory or can simply top up your commercial loan depends on the size and structure of the build. A modest extension that sits comfortably inside your existing equity can often be funded by a top-up of the commercial property loan you already hold, while a larger structural build that needs staged funding usually points to a dedicated development line assessed on loan-to-cost rather than income servicing.
Loan-to-cost is the ratio of the loan amount to the total cost of the build, and it is the lever development lenders use to size a factory extension facility. Unlike a standard loan-to-value read on the finished property, the loan-to-cost ratio measures how much of the project cost the lender will fund, with the balance covered by your equity, and ranges typically vary by lender.
Staged drawdowns on a development line release the loan in progressive advances rather than as one lump sum, with each advance paid as the build reaches a certified stage. The lender typically relies on a quantity surveyor or progress certification before each release, which protects both sides and keeps interest costs lower because you only draw what the build has reached. Our guide to how development finance works walks through the sequence, indicative and varies by lender.
Funding a factory extension without selling or refinancing the whole property is often possible, either by topping up the existing facility against built-up equity or by adding a development line alongside it. The right path turns on how much equity sits in the premises and on your exit strategy, so it is worth mapping both against the actual cost of the build before committing.
How long it takes to fund a factory extension depends on the path: a top-up where the equity is already there can move quickly, while a development line carries more documentation around the build, the costings and the exit. Specialist funders can return indicative terms in roughly 24 to 48 hours, varies by lender, but full settlement on a development facility takes longer because the project itself has to be assessed.
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