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Home › Half Expanders
DIY Class 1A Half Expander Cabins

Not enough space
for a full expander?

These particular units are for properties that don't have enough space for a full expander. We designed half expanders so your granny flat vision can still come true — the same WA-engineered quality, in a smaller footprint.

3 Models available
1–2 Bedroom layouts
From $45,000+GST Starting price
Cubby & Co Half Expander Half Expander

Cubby & Co

Our smallest half expander — a smart, self-contained footprint available in 1 or 2 bedroom layouts.

1-2 Bedrooms
1 Bathroom
1 Kitchen
6m*4.5m m² Floor area
2400mm Ceiling height
From $45,000+GST
View Detail→
Ancillary Most Popular Half Expander

Ancillary

A step up in size, with 1 or 2 bedroom configurations and room to genuinely live in.

1-2 Bedrooms
1 Bathroom
1 Kitchen
9m*4.5m m² Floor area
2400mm Ceiling height
From $60,000+GST
View Detail→
Little Lot Largest Layout Half Expander

Little Lot

Our biggest half expander — a spacious 1 or 2 bedroom layout for those who want a little more room.

1-2 Bedrooms
1 Bathroom
1 Kitchen
11.8m*4.5m m² Floor area
2400mm Ceiling height
From $75,000+GST
View Detail→
Cubby & Co27sqm The Ancillary40.5sqm · Most Popular The Little Lot53.1sqm
Bedrooms 1–2 1–2 1–2
Bathroom 1 1 1
Kitchen 1 1 1
Floor Area 27m² 40.5m² 53.1m²
Ceiling Height 2400mm 2400mm 2400mm
Best For Compact & entry-level Growing needs Most room to move
Starting Price $45,000+GST $60,000+GST $75,000+GST
View Detail→ View Detail→ View Detail→

Not sure which size fits your block?

Tell us your block dimensions and what you need the space for, and we'll point you to the right half expander model — no guesswork required.

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What Is a Half Expander?

A half expander is a factory-built home that travels compact and opens out on site, with a narrower opened width than a full expander. Our half expanders fold to around 2.3m wide for delivery and open to around 4.5m wide, giving you a complete 1 or 2 bedroom home with a kitchen and bathroom from a footprint that suits smaller blocks.

Perth Dynamic Solutions builds its half expanders in Western Australia to Class 1A standards, so they can go through council approval as a permanent dwelling. Choose from Cubby & Co (27m²), the Ancillary (40.5m²) or the Little Lot (53.1m²).

  • Cubby & Co 27m²
  • The Ancillary 40.5m²
  • The Little Lot 53.1m²
2.3m Folded width for delivery
4.5m Opened width on site
1–2 Bedrooms, plus kitchen and bathroom
1A Class standard, permanent dwelling

Half Expander vs Full Expander

Not sure whether a half or full expander suits your block? A half expander opens to around 4.5m wide, while our full expanders open to around 6.3m wide with floor areas from 36m² to 80m². If your block is narrow or space is tight, a half expander is usually the better fit. If you have the width, a full expander gives you more room.

Compare both on our Expanders page.

What's Included

Premium inclusions.
No hidden extras.

🏠

Premium as standard, not an upgrade

7-star energy rating, double glazing, a full window façade and stone benchtops come standard on every half expander — plus a full roof, 2m verandah and eco decking.

Half expander cabin interior
$4,500 Flat-fee shire approval assistance

One fixed, transparent fee — no hidden charges.

🌿

Council paperwork, handled

We work closely with our reliable council approval partner to guide your project through the shire application process, with an excellent success record across most WA councils.

📐

NCC compliant, WA-tested

Double glazed windows and doors, AS3786-compliant smoke alarms, 40mm floor insulation and AS3000-standard electrics — every unit is built to the National Construction Code.

🛠️

Six years of WA engineering experience

We design cost-effective houses and self-contained granny flats tailor-made to match your living requirements and budget, with professional consultants collaborating daily with the Shire.

The Process

Design it. Plan it. Build it.

01

Plan and Sign up

We start the process with deposit and get you started on the approval pathway.

02

Owner builder's process

Complete the Owner builders course refer to the Owner builders guide.

03

Council approval Submission

we will organise Engineering, Soil Testing, BAL Assessments, Energy efficency and CDC by Building Certifier to get the builiding permit.

04

Building your Class 1A Primary or Ancillary dweling

We select the finishes and colours of your choice.

05

Delivered and Installed

we Deliver and install you Class 1A home, now you can live or rent out with peace of mind.

Half Expanders for Small Blocks and Granny Flats

A half expander granny flat is a practical choice when your backyard is narrow, access is tight, or you simply don't need a large footprint. Owners use them as a granny flat for family, a guest or rental unit, a home office or a compact permanent home. All three half expander models sit within WA's 70m² limit for ancillary dwellings under the Residential Design Codes. Tell us your block dimensions, and we'll point you to the right model.

70m² WA limit for ancillary dwellings under the Residential Design Codes
  • Cubby & Co27m²
  • The Ancillary40.5m²
  • The Little Lot53.1m²
  • Granny flat for family
  • Guest or rental unit
  • Home office
  • Compact permanent home
Get Started Today

Ready to
build your own?

Tell us your site details, household size and how hands-on you want to be — we'll match you to a half expander model and get back with a straight-up, no-obligation quote.

Book an appointment Call Us

Half Expander FAQs

Still have questions? Contact us →

You can buy half expanders in WA from modular and portable home builders, relocatable home suppliers, and national dealers that deliver to the state. Perth Dynamic Solutions builds its half expanders in Western Australia and delivers Australia-wide. To get started, pick a model above or book an appointment and tell us your block dimensions. Whichever supplier you choose, compare what's included, whether the home is built to Class 1A standards, who handles council approval, the lead time, and the warranty.

A mix of local modular builders and national suppliers sell expandable homes in WA, and the products vary a lot in size, finish, and compliance. Perth Dynamic Solutions is a WA-based company that designs and supplies Class 1A half expanders, with council approval assistance and a 2-year warranty. When comparing companies, ask whether the unit is built to Class 1A standards, because that affects how it can be approved and used.

Prices depend on size, finish, and whether the unit is built to Class 1A standards. Our Class 1A half expanders start from $45,000+GST for Cubby & Co (27m²), $60,000+GST for the Ancillary (40.5m²) and $75,000+GST for the Little Lot (53.1m²). Budget for council approval assistance (a flat $4,500 fee), site preparation, and service connections on top. Book an appointment for a quote based on your block.

Yes, though most WA suppliers sell expandable homes as one part of a wider range. Perth Dynamic Solutions has a dedicated half expander range for properties that don't have room for a full expander, engineered in WA. Look for a supplier that can show completed projects, explains exactly what's in the price, and guides you through the approval process.

Yes. A half expander used as a dwelling needs a building permit, and planning approval depends on your block and how the home will be used. Ours are built to Class 1A standards so they can be approved as permanent homes, and our council approval partner guides your project through the shire application process for a flat $4,500 fee.

Customer Reviews

What people are saying about us.

★★★★★

"I did my research and looked at a few container homes in Perth and the owner Hassan was super helpful. The homes he sells are of higher quality than most and at a cheaper price. Hassan was super helpful and the process from start to finish was so easy. I can't recommend him enough. Thanks for all your help mate 👍"

Jayke Wright. Facebook
★★★★★

"Hassan has been amazing to deal with, very quick turnaround and able to answer all our questions. Best value and fast delivery, can't wait to get it set up!"

Jarred Hunter Facebook
★★★★★

"Easy to deal with, quick turnaround and great quality home!"

Shauni Humphries. Facebook
★★★★★

"Had no issue, fast responses and awesome communication!"

Hero Brown. Facebook
★★★★★

"Excellent quality, Great communication And honest guy who knows what he is doing"

Sean Neim. Facebook
Site-Ready // Book Appointment

Time to lock it in

Tell us about your site and we'll book you in with our team to walk through the right solution, size and layout — no obligation.

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  • Warranty2 Years
  • StandardAUS Compliant
  • DeliveryNationwide
  • Tried & tested by WA