Choosing a Modular Home Installer: Australian Buyer Checklist
Compare modular home installation quotes with a scope worksheet covering foundations, placement, connections, handover and who handles unfinished work.
Start with what “installation” includes
Before comparing modular home installers, ask your manufacturer who is responsible for getting the home from its delivery condition to a finished, usable dwelling. A quote for placing a module on prepared foundations can cover much less than a quote that also includes joining modules, connecting services and arranging completion documents.
Use the worksheet below to compare the same work across each proposal. It is for buyers choosing a separate installation contractor or checking an installation allowance in a builder's quote. For truck access, transport and crane planning, use the delivery and installation guide.
This is general buyer information, not an engineering specification or advice on licensing, contracts or approval. Requirements vary with the work, building type and state or territory. Confirm them with the relevant regulator and your project professionals.
Ask the manufacturer before finding a separate installer
Start with a written question: “Does your quoted scope include installation at my address, and can a separately appointed contractor complete any excluded work?”
Ask for the installation instructions, drawing revision and information the contractor will need to price the job. Establish whether the manufacturer needs to review the proposed contractor or inspect particular stages. Ask how using another business affects the manufacturer's stated warranty arrangements; do not assume the answer from a brochure.
A recommendation is a starting point for enquiries. Still check the proposed contractor's own scope, identity and suitability for the work. Conversely, do not assume every business in a modular home builder directory accepts installation-only jobs or installs another manufacturer's product.
Write down who coordinates the manufacturer, site contractor and installer. If the answer is you, ask what information and decisions you would be expected to manage before accepting that arrangement.
Check the business behind the quote
Compare the legal business name on the proposal with the name of the business you intend to engage. Ask who supervises the site work and which parts go to subcontractors. Request evidence of the qualifications, licences or registrations and insurance relevant to the proposed scope, then check the applicable state or territory requirements.
For NSW projects, the NSW Government's contractor checking guidance links to official licence checks. Treat that as a NSW resource, not a national licensing rule. The NSW Planning Portal's builder selection advice also supports checking a shortlist before engagement.
Ask for examples of comparable completed work: a similar module system, joining detail and site arrangement are more useful than an unrelated commercial installation. Where a past client agrees to be contacted, ask whether the quoted scope matched the work completed and who resolved outstanding items. This is a reference enquiry, not proof that your project will have the same outcome.
Copy this installation scope worksheet
Prepare one sheet per quote. Record the site address, module model, drawing revision, quote date and contractor. For each row, enter included, excluded, allowance or not yet confirmed, followed by the responsible business and the document that confirms it.
| Work to clarify | Question for the quote |
|---|---|
| Site assessment | Has the contractor assessed this site and the manufacturer's current drawings? |
| Foundations | Who supplies, constructs and checks the foundations before delivery? |
| Readiness decision | Who gives the written go-ahead for the module to leave the factory? |
| Transport interface | Where does the carrier's work end and the installer's work begin? |
| Placement | Does the price cover the required placement method, equipment and labour? |
| Module connections | Who completes structural connections and records the work? |
| Weatherproofing | Who seals junctions and makes the building weather-tight? |
| Services | Where exactly do plumbing, electrical and other connection scopes start and finish? |
| External works | Are steps, landings, decks, skirting and drainage included or separate? |
| Inspections | Who arranges inspections and provides the relevant installation records? |
| Commissioning | Who checks that connected systems work and records unresolved items? |
| Completion | What documents and remaining work are needed before the intended use can begin? |
| Defects | Which business receives a defect report and coordinates a response? |
| Disruption | What happens to the price and bookings if the site or module is not ready? |
Do not fill a blank with “probably included”. Send the incomplete rows back to the contractor. Keep the answers with the quote and use the building contract checklist when reviewing how the agreed work is recorded.
Make the connection points specific
“All services connected” needs more detail. Does it mean internal connections between modules, connection to existing points beside the home, or new trenches and connections across the property? Ask the relevant contractor to mark the limits on a plan.
Apply the same approach to foundations and external works. “Installed on stumps” does not tell you who designs or constructs the supports, checks their location or handles a mismatch. “Ready for handover” needs a list of remaining documents and tasks, rather than an assumption that a truck leaving the property means the project is finished.
Ask each party to acknowledge the information it receives from the others. The modular build-process guide explains the wider sequence; this worksheet identifies which business owns each part of your installation quote.
Example: two quotes with different finishing points
Consider a hypothetical buyer placing a two-module home on a regional block. The manufacturer supplies the modules, while a local contractor builds the foundations.
Installer A quotes for positioning and joining the modules on foundations supplied by others. Installer B also allows for service connections beside the home and external steps. Both proposals use the word “installation”. Comparing their totals without checking the scope would miss the difference.
The buyer sends both installers the same plan and worksheet. They ask the foundation contractor who checks the final positions, the manufacturer who provides the joining details, and each installer what happens if those details change. They also obtain separate clarification of trenching across the block, which neither quote has included.
The useful result is a comparable scope with named responsibilities. This example makes no price, time, compliance or performance prediction.
Questions to settle before booking
Ask for the sequence in writing: what must be complete before the installation booking is confirmed, who checks it, and when the check happens. Resolve who communicates a delay to the carrier and other trades, and how any additional costs are agreed.
Ask how the home is protected if placement and final sealing cannot happen together. Leave the method to the responsible professionals; your task is to establish who has priced and planned it.
Finally, agree on the handover record. It should identify completed work, outstanding items, the documents each contractor will provide and the contact for follow-up. Keep dated photographs and correspondence with the project records. For the wider document pack, use the tiny home handover checklist.
If you are still choosing the home
Compare the manufacturer's complete project scope before deciding to split contracts. A compact prefab buyer can also review Zinc Studio and ask which installation responsibilities are included for the proposed site. Zinc Studio is a featured commercial pathway. This link does not imply that it offers standalone installation or installs other manufacturers' homes.
Sources and limits
Sources checked 11 September 2026:
- NSW Government: checking your contractor or tradesperson is qualified.
- NSW Planning Portal: how to select a builder.
The worksheet and example are editorial comparison aids. They do not certify an installer, specify construction methods or establish a national licence category. Confirm project requirements, insurance, contractual responsibilities and permission to occupy with the relevant professionals and authorities before relying on a proposal.