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Australia’s Top Prefab & Modular Granny Flat Providers

Compare leading prefab providers in one place, with a clear breakdown of how modular, panelised and relocatable builds differ.

If you want a streamlined, predictable way to build, a prefab granny flat is hard to beat. Below we’ve gathered Australia’s leading providers so you can compare designs, delivery and inclusions side by side.

Know the difference

Modular vs Kit vs Prefab

“Prefab” is an umbrella term. The build method changes your delivery, site works and resale options.

Volumetric Modular

Built as a complete 3D box (or boxes) in a factory, arriving about 95% finished and craned onto screw piles.

Panelised Prefab

Walls and roof are built as flat panels (SIPs or timber frames), trucked to site and assembled like a jigsaw.

Relocatable

Built on a permanent steel chassis and designed to be moved again, so it can be sold separately from the land.

Hi-Tech Homes

Bringelly

$$$

Factory-built relocatable homes with a traditional country look. Ask what crane, piers and sewer connection sit outside the factory invoice before you compare the headline price.

Country StyleModularRelocatable

02 4774 8388

VanHomes

Berkeley Vale

Expanding homes that fold out on site. In NSW they can often sit as caravan-class installs, but confirm with your council first.

ExpandingCheck councilRelocatable

1300 866 131

Avalon Granny Flats

Northern Beaches

$$$

Higher-end modular designs for Northern Beaches blocks. Coastal detailing and premium finishes.

ArchitecturalCoastalDesign

02 9918 3544

Uniplan Group

Armidale

Strong option for regional NSW. Homes arrive more finished, so you need fewer site trades.

RegionalCompleteModular

1300 864 752

Prestige Kit Homes

NSW Wide

Known for kits, with modular truck-delivered options if you want less on-site assembly.

SteelKit/ModularOptions

1300 653 442

Premier Homes

Bayswater

$$$

Large Bayswater display village. Relocatable homes aimed at dependent-person and secondary-dwelling use.

Display VillageDPUGranny Flats

03 9761 6699

Anchor Homes

Stratford / Melb

$$$

Architectural modular homes built in Stratford and delivered across Victoria. Premium price band.

LuxuryModularStatewide

03 5145 7110

Modscape

Brooklyn

$$$$

High-end steel-frame modules. Expensive, but the finish quality is the point of the brand.

Ultra LuxurySustainableArchitect

03 9316 6000

Ecoliv

The Gurdies

$$$

Pushes 7-star energy and sustainable materials. Suits off-grid or eco-focused builds.

Eco FriendlySustainableOff Grid

03 5672 5196

Swanbuild

Swan Hill

Country-style homes delivered in modules. A solid pick for rural Victorian blocks.

CountryTransportableCustom

1800 008 024

Hoek Modular Homes

Brisbane

Homes arrive close to move-in ready. Useful when speed matters more than custom detailing.

Ready to MoveFastGranny Flats

07 3889 7385

Arkular

Gold Coast

$$$

Sustainable modular homes with timber-led finishes and a strong indoor-outdoor focus.

SustainableArchitecturalCustom

0493 056 908

The Little House Co

Sunshine Coast

Small-footprint living with Sunshine Coast styling. Boutique rather than volume builder.

BoutiqueCoastalStylish

07 5456 2202

Westbuilt Homes

Warwick

Go-to transportable builder for western QLD. Designs aimed at harsh inland conditions.

RegionalTransportableRural

07 4661 2866

Oly Homes

Yandina

Long-running QLD transportable builder. Practical, durable stock rather than showpiece architecture.

FastAffordableTransportable

07 5446 7333

Modular WA

Wangara

Perth modular builder using a concrete floor on a steel chassis for a more solid underfoot feel.

Steel ChassisPerthQuality

08 6454 0919

Fox Modular

Gnangara

$$$

Modern box-style modules that suit contemporary Perth backyards.

ArchitecturalModernDesign

08 6117 5714

TR Homes

Maddington

Specialists for remote WA delivery. Worth calling if you are in the Pilbara or Kimberley.

RemoteRegionalAward Winning

08 6332 3000

Evoke Living

Northam

Family-owned Wheatbelt transportable builder. Straightforward construction, local service.

WheatbeltTransportableFamily

08 9621 1666

Park Homes WA

Mandurah

Park homes and lifestyle-village units. Budget-focused and quick to place, but confirm whether your lot is a caravan park, lifestyle village or a private backyard with council rules.

Park HomesBudgetSpeed

08 9581 6122

Sarah Homes

Mile End

Well-known SA holiday and lifestyle home builder. Designs that suit seaside and lifestyle blocks.

LifestyleHolidayModular

08 8301 8888

Rivergum Homes

Adelaide

Large builder with a dedicated transportable division and a wide floor-plan range.

Major BuilderTransportableRange

1800 466 374

Dechellis Homes

Adelaide

$$$

Mostly site-built premium work, with designs that can suit smaller blocks when the lot allows.

PremiumCustomQuality

08 8362 7427

Out-Back Portable

Regional SA

Simple transportable buildings for farms and spare rooms. Budget-first, not boutique: confirm wind rating, insulation and whether it can be certified as a Class 1a dwelling on your lot.

TransportableBudgetRural

0428 515 220

Tasbuilt Homes

Westbury

$$$

Major modular player in Tasmania. Ask what they lodge with council versus what you still handle yourself.

PremiumModularStatewide

03 6393 1013

Podmatrix

Cambridge

$$$

Architectural pods with Tasmanian timber detailing. High-end look, premium price.

DesignArchitecturalCladding

03 6248 5566

Rainbow Building Solutions

Sorell

Kits and full builds on a steel frame system suited to Tasmanian conditions.

SteelKit/BuildLocal

1300 737 910

How to read this prefab directory

Does the factory price include site works?

Usually not. Crane hire, piers, sewer, power metering and energy certificates sit outside the module invoice. Ask for a written split between factory and on-site costs before you compare two suppliers.

Do small granny flats skip NCC energy rules?

No. Secondary dwellings still follow National Construction Code energy provisions. See the Australian Building Codes Board and NatHERS for the current 7-star / whole-of-home pathway.

How should I shortlist from these cards?

Use city, tags and the supplier website, then call with your lot address and overlay. The Granny Flat Guide Team does not build or sell these homes; we list public supplier details so you can compare factory vs site-built options.

Primary sources

Size caps, approval pathways and dollar bands on this page are planning ranges. Check the current official page before you lodge or sign.

See our editorial standards for how we research and update guides.

Due diligence

What to Ask Before Choosing a Prefab Provider

Three questions that separate a clean delivery from a budget surprise.

What does “turnkey” really mean?

The turnkey price often excludes the crane. With powerlines or trees in the way, a 100-tonne crane can cost around $10,000 a day. Get a site access check before signing.

Visit the factory or display home

Never buy off a floor plan alone. Inspect the frame quality and how modules are stored before delivery.

Chassis engineering and resale value

For relocatable homes, ask whether the chassis is rated for a single lift or multiple lifts. It affects future resale.

Don’t Start Building Without a Budget

Material costs and council fees shifted again in 2026. Avoid budget blowouts with our free granny flat feasibility calculator.

Estimate site costs (excavation, slab, crane)
Compare kit, modular and custom build types
Four-phase breakdown with instant results

Open the free cost calculator

Have a budget? Get free quotes to compare against your estimate.

Compare the alternatives

Weighing Up Another Build Method?

The right path comes down to your budget, timeline and how hands-on you want to be. Compare the other two options.

DIY Kits

The owner-builder route. Save the builder margin on steel or timber kits.

Explore this option

Custom Home Builders

Licensed local builders for a fully bespoke granny flat.