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Modular home costs, layer by layer

From Modular Living Australia — the independent knowledge base Last updated: 8 Oct 2026

A modular home's advertised price usually covers only part of the project: the cost layers are the factory home, site-specific design, transport and placement, foundations and joining, services, external works and handover.^[5] Published rates range from about A$2,000 to A$4,600 per m² depending on the source, and one supplier's 2026 price list runs from A$216,500 for a one-module, one-bedroom home to A$602,900 for four modules.^[1][2][3] These are builder-published commercial guidance, not independent survey data.

A modular home is usually advertised as a single number. That number is almost never what the project costs, and the gap is not a matter of hidden fees so much as of scope — how much of the work the quoted figure is actually buying. Two builders can advertise figures A$80,000 apart and be offering the same finished result, or advertise identical figures for scopes that differ by a third. This guide sets out the layers a modular project is priced in, and why the published square-metre rates circulating in Australia disagree so widely.

The word attached to the price §

The most consequential thing in a modular quote is often a single adjective. A directory compiling current Australian listings notes that an advertised figure may be described as ex-factory, supplied, delivered, installed, connected or ready for occupation, and that these terms are not interchangeable^[5]. Each one moves the boundary of what the buyer still has to arrange and pay for.

The same source separates a modular project into scopes that are worth treating as distinct budget headings^[5]:

Where manufacturing and on-site work are split between two businesses, the practical question is which contract and which insurer covers the junction between them^[5].

What a published price list looks like §

Some builders publish figures. One Western Australian manufacturer's 2026 list, marked by the supplier as correct at 28 May 2026, gives the following examples^[3]:

These are builder-published commercial guidance for one supplier's range within its own service area, not a market average and not an offer for any particular block. The same list is reported to include substantial standard inclusions — site-specific structural engineering, some applications and permits, an engineered pre-stressed concrete slab, steel framing, and specified finishes and fixtures^[3]. That matters more than the number: a competitor quoting less may simply be quoting for less.

Why square-metre rates disagree §

Published per-square-metre rates for Australian modular homes do not converge, and the spread is larger than can be explained by inflation or region alone. One builder's cost guide puts rates commonly between A$3,800 and A$4,600 per square metre, while noting that some builders advertise from around A$2,300^[1]. Another puts modular construction at roughly A$2,000 to A$3,500 per square metre and traditional construction at A$3,000 to A$5,500^[2].

Taken together the published range is roughly A$2,000 to A$4,600 per square metre. Both ends are builder-published. The most likely explanation for the divergence is that the figures are not measuring the same thing: a rate derived from an ex-factory package and a rate derived from a completed, connected home will differ substantially even for identical buildings. A square-metre rate is therefore useful for sanity-checking a quote you already hold, and close to useless for comparing two builders who have not stated their scope.

The corollary is that the widely repeated claim that modular is inherently cheaper does not follow from these numbers. That question is treated separately in Are modular homes cheaper than traditional homes?

Programme is part of the cost §

An industry publication states a typical modular programme of 14 to 20 weeks in total, made up of 8 to 10 weeks in the factory and 6 to 8 weeks on site^[4]. Where a project is financed, the length of the construction period has a direct cost, because interest accrues on drawn funds and any rental or temporary accommodation runs in parallel. A shorter programme is a real saving; it is also the part of a modular quote most exposed to route permits, crane availability and weather at the site end rather than the factory end.

Documentation is not free either §

The Australian Building Codes Board's handbook on prefabricated, modular and off-site construction makes the point that evidence of compliance for work done off site — and for elements that are concealed once modules are joined — needs to be planned into the process rather than assembled at handover^[6]. In budget terms this appears as inspection, certification and reporting line items, and as the cost of any rework where evidence is missing. It is a small share of a project and a common source of delay at the point where the final payment is due.

Normalising two quotes §

Before comparing figures, the practical step is to reduce both to the same scope. The questions that do most of that work are^[5]:

• What location, site classification and wind or bushfire assumptions sit behind the price?
• Is the foundation included, and is it site-specific or nominal?
• Is transport priced to the actual address, for the actual module count?
• Are permits, escorts, crane and traffic control included?
• Where do factory plumbing and electrical works terminate, and who connects and certifies them on site?
• Which approval and evidence-of-suitability documents are supplied?
• Which items are provisional sums, and which are subject to rise-and-fall?
• What is excluded from "turnkey" or "move-in ready"?

Recording, for every line, the amount, its source, its date, its GST status, who is responsible and whether it is fixed or provisional produces a document that can be compared across builders^[5]. Without that, the comparison is between advertising copy.

What this site does not have §

No independent Australian survey of completed modular project costs — factory price against final delivered cost, across builders — has been located for this guide. Every figure above is builder-published or compiled from builder publications by a commercial directory. Treat them as indicative of what suppliers advertise, not as evidence of what buyers pay.

References §