Seven Star Infrastructure
Expandable Granny Flats

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Australian-made portable and modular building solutions. Browse by category below.

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Expandable Granny Flats

Innovative expandable designs that fold out to create generous living spaces. Transport-friendly and quick to set up.

31 designs available

Frame
Beds
Area
20ft Expandable Oasis — 1 BedMost Popular

20ft Expandable Oasis — 1 Bed

Private bedroom with kitchen and bathroom across 38.3m². Ideal for longer stays and guest hosting.

1
1
1
38.3m²
From

$34,200

20ft Expandable Oasis — 1XL Bed

20ft Expandable Oasis — 1XL Bed

Extra-large bedroom with kitchen and full bathroom across 38.3m². Perfect for couples or long-stay guests.

1
1
1
38.3m²
From

$34,200

20ft Expandable Oasis — 2 Bed

20ft Expandable Oasis — 2 Bed

Two separate bedrooms with bathroom and kitchen in one expandable unit. Great for co-living or multiple guests.

2
1
1
38.3m²
From

$34,200

20ft Expandable Oasis — 2L Bed

20ft Expandable Oasis — 2L Bed

Two bedrooms with bathroom and kitchen across 38.3m². Separate sleeping zones for families or flatmates.

2
1
1
38.3m²
From

$34,200

20ft Expandable Oasis — Open Plan

20ft Expandable Oasis — Open Plan

Open-plan layout with kitchen and bathroom across 38.3m². Ideal for Airbnb, studios, or work-from-home.

1
1
38.3m²
From

$32,500

20ft Expandable Sanctuary

20ft Expandable Sanctuary

Versatile blank-canvas space expanding to 27m². Suits offices, classrooms, accommodation, and more.

27m²
From

$21,900

20ft Expandable Sanctuary LUXPremium

20ft Expandable Sanctuary LUX

Premium Sanctuary with insulated wall panels and optional cladding. Expands to 27m² on-site.

27m²
From

$25,900

20ft Expandable Serenity — 1XL Bed

20ft Expandable Serenity — 1XL Bed

Refined 36.2m² expandable with an extra-large bedroom, premium bathroom, and full kitchen.

1
1
1
36.2m²
From

$31,900

20ft Expandable Serenity — 2 Bed

20ft Expandable Serenity — 2 Bed

Two bedrooms with premium bathroom and full kitchen across 36.2m². Arrives compact, expands on-site.

2
1
1
36.2m²
From

$33,900

20ft Expandable Serenity — 2XL Bed

20ft Expandable Serenity — 2XL Bed

Two extra-large bedrooms with premium bathroom and full kitchen across 36.2m².

2
1
1
36.2m²
From

$32,900

20ft Expandable Serenity — Open Plan

20ft Expandable Serenity — Open Plan

Open-plan 36.2m² layout. Perfect as a backyard studio, family retreat, or short-stay rental.

36.2m²
From

$32,900

20ft Expandable Serenity — Open Plan, Bath & Kitchen

20ft Expandable Serenity — Open Plan, Bath & Kitchen

Open-plan with full bathroom and kitchen across 36.2m². Includes hot water, cladding, and insulated panels.

1
1
36.2m²
From

$32,900

20ft Expandable Vista — 1 Bed

20ft Expandable Vista — 1 Bed

Compact 1-bedroom with bathroom and kitchen. Expands on-site into two private areas.

1
1
1
23.3m²
From

$34,900

20ft Expandable Vista — 1 Bed (Solid Walls)

20ft Expandable Vista — 1 Bed (Solid Walls)

1-bedroom with solid side wall for extra privacy. Ideal for fence or boundary placement.

1
1
1
23.3m²
From

$34,900

20ft Expandable Vista — Open Plan

20ft Expandable Vista — Open Plan

Sleek open-plan cabin for 1–2 occupants. Great for guest rooms, backyard retreats, or short-stay rentals.

1
1
23.3m²
From

$32,500

20ft Expandable Vista — Open Plan (Solid Walls)

20ft Expandable Vista — Open Plan (Solid Walls)

Open-plan studio with solid side wall. Light-filled and ideal for boundary-adjacent placement.

1
1
23.3m²
From

$32,500

20ft Studio — Open Plan

20ft Studio — Open Plan

Compact 13.3m² studio with no expanding sections. Minimal set-up — just place and connect.

13.3m²
From

$23,900

20ft Studio — Open Plan, Bath & Kitchen

20ft Studio — Open Plan, Bath & Kitchen

Fully fitted 13.3m² studio with bathroom and kitchen. Budget-friendly and ready to connect.

1
1
13.3m²
From

$24,900

30ft Expandable Mirage — 2 Bed

30ft Expandable Mirage — 2 Bed

Two bedrooms with kitchen and bathroom across 59.2m². Delivered flat, unfolds on-site.

2
1
1
59m²
From

$55,500

40ft Expandable Haven — 1 Bed, WIR + Laundry

40ft Expandable Haven — 1 Bed, WIR + Laundry

1 bedroom with walk-in robe, laundry, bathroom, and kitchen across 78.1m².

1
1
1
78.1m²
From

$55,084

40ft Expandable Haven — 2 Bed + Laundry

40ft Expandable Haven — 2 Bed + Laundry

2 bedrooms with laundry, bathroom, and kitchen across 78.1m².

2
1
1
78.1m²
From

$54,479

40ft Expandable Haven — 2 Bed, 2 WIR-A + Laundry

40ft Expandable Haven — 2 Bed, 2 WIR-A + Laundry

2 bedrooms each with walk-in robe, plus laundry, bathroom, and kitchen across 78.1m².

2
1
1
78.1m²
From

$55,775

40ft Expandable Haven — 2 Bed, 2 WIR-B

40ft Expandable Haven — 2 Bed, 2 WIR-B

2 bedrooms each with WIR-B, bathroom, and kitchen across 78.1m².

2
1
1
78.1m²
From

$55,127

40ft Expandable Haven — 2 Bed, WIR-A + Laundry

40ft Expandable Haven — 2 Bed, WIR-A + Laundry

2 bedrooms (one with WIR-A), laundry, bathroom, and kitchen across 78.1m².

2
1
1
78.1m²
From

$54,911

40ft Expandable Haven — 2 Bed, WIR-B + Laundry

40ft Expandable Haven — 2 Bed, WIR-B + Laundry

2 bedrooms (one with WIR-B), laundry, bathroom, and kitchen across 78.1m².

2
1
1
78.1m²
From

$54,911

40ft Expandable Haven — 3 BedLargest

40ft Expandable Haven — 3 Bed

Three bedrooms with bathroom and kitchen across 78.1m². Maximum family living in a transportable 40ft frame.

3
1
1
78.1m²
From

$54,263

40ft Expandable Haven — Open Plan

40ft Expandable Haven — Open Plan

78.1m² open-plan with space-saving kitchen and luxurious bathroom. Configure to your own needs.

78.1m²
From

$53,993

40ft Expandable Haven — Open Plan, Kitchen

40ft Expandable Haven — Open Plan, Kitchen

78.1m² open-plan with kitchen and bathroom. Spacious and versatile — the not-so-tiny tiny home.

1
1
78.1m²
From

$51,001

Eden — 1 Bed, Bath & KitchenNew

Eden — 1 Bed, Bath & Kitchen

Architecturally finished 29.7m² with fitted wardrobe, kitchen, bathroom, and study desk.

1
1
1
29.7m²
From

$38,950

Retreat — 1 Bed

Retreat — 1 Bed

Compact expandable with bedroom, shower, and toilet. Place it and connect — effortless setup.

1
1
8.91m²
From

$19,900

Retreat — Open Plan

Retreat — Open Plan

Bare-shell 8.9m² expandable. Versatile and customisable — place it, connect it, use it.

8.91m²
From

$12,191

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