How-to guide · Supporting Modular & Prefab

Financing a modular build (progress payments, staged approvals)

Modular finance is meaningfully different to traditional construction finance. Progress payments, factory ownership, and lender comfort all shape the finance package.

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In brief

Modular home finance is one of the areas where prefab and traditional construction differ most significantly. Lender attitudes vary, security arrangements are different, and the payment structure reflects the factory-based construction method.

This guide covers the practical finance framework for modular home builds in Adelaide in 2026. It is educational content, not financial advice. Any real decision should be made with a licensed finance professional.

Key takeaways

  • 1Lender comfort with modular has grown but is still not universal; some mainstream lenders decline modular finance.
  • 2Progress payments for modular are structured differently than for site-built because a large portion of value sits in the factory.
  • 3Factory-built modules typically require the manufacturer to hold the module until delivery, complicating security.
  • 4Specialist modular finance lenders exist and understand the specific structure.
STEP 1

1. Not every lender does modular

Mainstream Australian residential lenders have varied appetite for modular finance. Some fully support it, others decline it entirely, and many have specific rules that differ from their traditional construction lending.

The reason: during traditional construction, the growing value is progressively secured to the land at each stage. During modular construction, most of the value sits in the factory as work-in-progress, not on the land. Lenders vary in their comfort with this arrangement.

For modular projects, work with a broker who has specific modular finance experience. They know which lenders are comfortable with modular and can navigate the differences in application requirements. Time spent finding the right lender is worth more than time spent shopping rates.

STEP 2

2. Progress payment structure

A typical modular payment structure: deposit at contract (often 20 to 30 percent, higher than traditional), factory progress payments (staged as modules are built), and delivery and installation payments.

The factory progress payments are the distinctive feature. They typically flow directly to the manufacturer rather than through site inspections. Some lenders will fund these; others require them to be funded from owner equity until delivery.

The delivery payment is triggered by the modules being installed on site and connected to services. This is the point where value transfers from factory to land, and where lenders become more comfortable with security.

The finishing payments (post-delivery services connections, external finishing, landscaping) flow as in traditional construction, tied to inspection milestones.

STEP 3

3. Security during factory build

The security question during factory build is: what protects the lender or the owner if the manufacturer becomes insolvent while modules are in production?

Various arrangements exist: some manufacturers offer bank guarantees; some use escrow arrangements holding progress payments in trust until delivery; some rely on the reputation and financial strength of the manufacturer without formal security.

For higher-value modular projects, insist on formal security arrangements. The lender may require them anyway. Manufacturer insolvency is uncommon but not unheard of, and the consequences can be significant.

The Home Indemnity Insurance framework in South Australia provides some consumer protection for building contracts. Confirm that the modular manufacturer holds current HII cover and understand what it does and does not cover.

STEP 4

4. Valuation approach

Valuation for a modular home is done "as if complete" at contract stage, based on the completed home standing on the site. This valuation supports the loan-to-value ratio and the total loan amount.

Progress inspections during construction may involve remote inspection of the factory (some lenders accept photographic evidence), physical factory visits (rare), or site inspection at delivery and completion (most common).

The valuation firm may need specific modular experience. If your bank cannot supply a modular-experienced valuer, this can slow the process. Ask your broker to confirm valuation arrangements at pre-approval stage.

STEP 5

5. Practical tips for smoother modular finance

Get pre-approval early with a modular-experienced broker. Some paths that work for traditional construction do not work for modular.

Provide the manufacturer contract, the factory location, and the manufacturer track record to the lender upfront. The more the lender knows, the more comfortable they become.

Consider a higher deposit if lender terms are difficult. A 30 to 35 percent deposit often opens up more lender options and better rates than a 20 percent deposit for modular.

Plan cash flow through the factory build phase carefully. If some progress payments must be funded from equity rather than the loan, you need liquid capital available at the right moments.

Once modules are installed, refinance to a standard residential mortgage may improve rate and terms. Ask your broker to plan the refinance at practical completion.

Adelaide reality check

Modular finance is more complex than traditional construction finance but very manageable with the right broker. Do not let finance be an afterthought; sort it out at design stage.

FAQs

Typical is 20 to 30 percent for owner-occupier, higher for investor. Some lenders require even higher deposits for modular. Get pre-approval on your specific project to confirm the number.
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