Name: 40ft Class 1a (Council Approved) Expander Home
Brand: Express Portables
SKU: EXP4001A
Price: 104000.0 AUD
Availability: InStock
Rating: 4.5 (100 reviews)

Key Features

NCC & BCA Class 1a Compliant Nationwide Delivery

Insulation

7 Star Energy Efficiency Rating (climate zone 2)

Cladding

Timber grain effect

Roof

10° Pitched Roof

Flooring

Timber look vinyl

Windows and Doors

Aluminium Double Glazed

Plumbing

WELS & Watermark approved

Bathroom

NCC Compliant Accessible Bathroom

Electrical

AS/NZS 3000

Ceiling height

2400mm

Walls

75mm Polyurethane

Wind rating

Engineered to N3

Structural

Engineered steel frame

Class 1a Expander vs Standard Expander

Feature	Class 1a Expander	Standard Expander
Building Code Compliance	Compliant with NCC & BCA for residential use	Some aspects do not meet Australian Building Code
Wind Rating	Engineered to N3 wind rating	No certified wind rating
Wall & Roof Panels	High‑performance PU (polyurethane) panels	EPS (expanded polystyrene) panels
Roof Insulation	Insulated roof cavity with Anticon blanket	No roof cavity insulation
Steel Frame	Australian engineered galvanised steel frame with increased steel thickness	Basic minimum‑spec steel
Bathroom Waterproofing	AS/NZS compliant waterproof membrane system	Waterproof wall lining board only
Ceiling Height	2400 mm standard	Varies, typically from 2260 mm+
Energy Efficiency	Compliant with Australian energy efficiency standards	No energy efficiency compliance
Electrical Compliance	All electrical components registered with the Electrical Equipment Safety System (EESS)	All electrical components registered with the Electrical Equipment Safety System (EESS)

Polyurethane VS Polystyrene

PU Panels are suited for permanent dwellings (Class 1a) where energy efficiency, compliance, and long-term durability matter most.
EPS Panels are more cost-effective and lighter, but not as strong or thermally efficient.

	PU Panels (Polyurethane)	EPS Panels (Polystyrene)
Thermal Insulation	★★★★☆ High R-value - excellent for energy efficiency	★★★☆☆ Good insulation, but not as thermally efficient
Panel Strength	★★★★☆ High strength-to-weight ratio	★★★☆☆ Lightweight, but slightly less structural strength
Weight	★★★★☆ Lightweight but denser than EPS	★★★★★ Extremely lightweight
Moisture Resistance	★★★★☆ Closed-cell foam resists water and mould	★★☆☆☆ Can absorb moisture over time if not sealed
Sound Insulation	★★★★☆ Good acoustic suppression	★★☆☆☆ Limited sound-dampening ability
Durability / Longevity	★★★★☆ Long-lasting, resists degradation	★★★☆☆ Long lasting, but more prone to weathering & breakdown
Finish Quality	★★★★☆ Smoother and denser finish	★★★☆☆ Slightly softer feel, not as premium
Cost	$$$ Higher upfront cost, better long-term performance	$$ Lower cost, suitable for low-budget
Applications	Ideal for Class 1a dwellings, cold rooms, high-spec builds	Common in sheds, low-cost cabins, or temporary use

Specifications

What’s included from Express Portables

Class 1a Expander Home

Ready for installation by a licensed builder or under an approved owner-builder permit.

Building Certification & Engineering

We connect you with our trusted Building Certifier and Structural Engineer to streamline the approval process.

Building Certifications

Paperwork and documentation to support council and/or certifier approval.

Detailed Installation Guide for Builders & Trades

Step-by-step manual to guide licensed trades through setup and fit-off.

Transport to Your Site

If included, we coordinate the delivery of your home to your nominated site.

Warranty

Structural (6 yrs 6 mo) and non-structural (6 mo) defect protection.

Additional costs for
The Purchaser to Consider

While Express Portables supplies the Expander Home, there are additional third-party costs to consider.
The following is a guideline only and can vary based on location, site conditions and local council requirements.

Geotechnical Engineer

A soil test assesses soil conditions to ensure your footing design is appropriate and compliant.

Building Certifier

A licensed certifier is required to approve your Class 1a dwelling before installation and issue a final occupancy certificate once complete.

Review plans and engineering documents
Lodge approvals with council
Coordinate required inspections
Issue the final Certificate of Occupancy

Council Fees & Government Charges

Council related fees are not included in your base package and should be factored into your budget separately. These costs are site-specific and determined by your local council or state authority, depending on the zoning, intended use of the building, and any applicable overlays or planning schemes.

Transport and Crane Hire

Transport and crane services are a critical part of delivering and installing your Expander Home safely and efficiently. These services are typically quoted separately or itemised by Express Portables.

Site Plan

Customer to provide their own site plan with orientation and setbacks. We recommend a service like siteplansonline.com.au or engaging a site surveyor.

Foundations

The Expander Home is delivered ready for installation; however, foundations and footings are installed by the site builder/concreter. The purchaser will need to engage an engineer to conduct soil testing and design site specific foundations. Express Portables work with a network of engineers familiar with our expanders for sign off.

Installation

The installation of your Expander Home must be carried out by a licensed builder or an individual holding a valid owner-builder permit, in accordance with local building regulations. Installation involves:

Positioning the home on engineered foundations or footings
Connecting services such as power, water, sewer/septic, and stormwater
Completing structural fix-offs, including expansion and sealing
Carrying out any on-site works like decks, stairs, or ramps if required
Coordinating inspections as part of the final certification process

This ensures the dwelling is installed safely, in full compliance with Class 1a requirements under the National Construction Code (NCC) and qualifies for final occupancy approval.

Process

Step 1: Initial Enquiry or Display Village Visit

Start by contacting the Express Portables sales team for a no-obligation chat about your project. We'll walk you through the options, answer any questions, and explain what's involved with owning a Class 1a Expander Home.

You can also book a private tour at our Gold Coast Display Village to view our homes in person.

Whether you’re still planning or ready to move ahead, this first step is all about giving you clarity, confidence, and expert advice from the start.

Step 2: Site Suitability & Pre-Approval Check

Once you’re ready to proceed, we’ll connect you with our trusted Building Certifier and Structural Engineer for a preliminary assessment. Alternatively you can provide your own preliminary assessment from a town planner or building certifier to assess eligibility.

You will need to provide your own site plan to conduct a preliminary assessment. This preliminary assessment helps identify any potential planning restrictions, zoning issues, or site challenges early on — such as setbacks, overlays, wind speed, and climate zone.

This step ensures you have confidence that your project is likely to meet council and building code requirements before moving further into the approvals process.

Step 3: Contract Signing & Initial Deposit

Once your site has been deemed suitable and you’re ready to move forward, we’ll prepare your Build Contract.

This contract will outline:

The scope of works and what's included in your Expander Home package
Customisations (if any) and your selected finishes
Estimated timeframes for manufacturing, delivery, and installation
Payment terms, including deposit and progress payments

To secure your place in our production schedule, a non-refundable initial deposit is required upon signing. This deposit confirms your commitment and allows us to begin the next steps — including final plans, engineering, and scheduling your batch build.

🛈 Note: We’ll ensure you have ample time to review and understand all contract details, and we’re here to answer any questions before you sign.

Step 4: Factory Construction

Once your contract is finalised, your home enters our scheduled production process. Built in controlled factory conditions by our trusted manufacturing partners, this approach ensures consistent quality, weather protection, and reliable delivery timelines.

The Express Portables design team oversees all aspects of compliance, workmanship, and detail throughout the build. Construction typically takes 9–11 weeks to complete.

Step 5: Shipping, Transport & Delivery

Once factory construction is complete, your home is carefully prepared for shipment. International shipping from our manufacturing facility typically takes 4–5 weeks.

Transport to your site is scheduled in coordination with you or your site builder. Your builder is responsible for unloading the building onto the prepared footings and beginning the installation process.

After installation, the customer is required to arrange the final Occupancy Certificate, with guidance and support provided by our Building Certifier to ensure a smooth approval process.

Request Quote

Frequently Asked Questions

What is a Class 1a Expander Home and how is it different from other Expanders?

Express Portables Class 1a Expander Homes are fully self-contained, certifiable dwellings built to comply with the National Construction Code (NCC) and Australian Building Code (BCA), designed for permanent residential use.

Is the Expander Home compliant with Australian building regulations?

Yes, the Class 1a Expander Homes meet NCC and BCA standards and come with the necessary certifications for structural, insulation, plumbing, and electrical compliance.

Who can install the Expander Home?

Installation must be carried out by a licensed builder or someone holding an approved owner-builder permit to ensure compliance and safety.

Is the Expander Home suitable for bushfire-prone areas requiring a BAL rating?

No. Our Expander Homes are not certified for sites that require a Bushfire Attack Level (BAL) rating. If your property is located in a bushfire-prone area, additional assessment and modifications would be required, which are not currently offered by Express Portables.

What does Express Portables include with the purchase?

We provide the Class 1a Expander Home (packed down), building certifications, site-specific footing designs, delivery (if quoted), a detailed installation guide, and structural warranties.

What is not included in the Expander Home package?

Costs like development approvals, site preparations, crane hire, appliances, furniture, decks, patios, gutters, and onsite installation services and insurances are not included.

How long does the factory construction and delivery process take?

Factory construction typically takes 9-11 weeks, followed by 4-5 weeks for international shipping to Australia.

Are the Class 1a buildings acoustically rated??

These buildings are not acoustically reated and have not undergone sound performance testing or engineering.

What site preparations do I need to arrange?

You need to organise soil testing, footings, site works, and connection to utilities, usually via your site builder or other local contractors.

What additional approvals or permits do I need?

You will require development approvals and certification from a building certifier before installation, including a final occupancy certificate.

How does the Expander Home handle insulation and energy efficiency?

Our homes use 60mm polyurethane panels offering high thermal insulation and energy efficiency, superior to typical polystyrene panels.

What warranty coverage do the homes have?

Structural defects are covered for 6 years and 6 months, while non-structural defects have a 6-month warranty.

Can I customise finishes or add extras to my Expander Home?

Yes, we offer options like decks, patios, air conditioners, and hot water units, which can be added separately to your Quote.

Are the windows and doors double glazed?

Yes, all windows and doors feature aluminium frames with double glazing to improve thermal and acoustic performance.

What should I expect during the installation process?

Your licensed builder will unload the home onto the engineered footings, install and assemble the Expander unit, connect all necessary services (power, water, sewer), complete structural fit-offs and coordinate required inspections to obtain final certification.

Is nationwide delivery available?

Yes, we arrange delivery across Australia and can coordinate transport as part of your package.

How do I get started with purchasing an Expander Home?

Start by contacting our sales team for an initial consultation or visit our Gold Coast Display Village. We will guide you through site suitability, approvals, contracts and the process.

Are these buildings suitable for high snow fall areas?

No. The buildings do not have a snow load rating.

40ft Class 1a (Council Approved) Expander Home