DIY Class 1A Cabins

Build it yourself.
We handle the paperwork.

Cost-effective, self-contained cabins and granny flats engineered in Western Australia. As your owner-builder partner, we handle the Shire approval process for you — giving you a WA-tested, council-ready build.

Download our Class1A brochure (PDF)

6 Models available

1–4 Bedroom layouts

From $23,000+GST Starting price

0 models shown

Largest Layout Expander

Meridian

Our biggest Class 1A footprint — a 2 to 4 bedroom family layout with room to genuinely live in, not just get by.

2 - 4 Bedrooms

1 Bathroom

1 Kitchen

70–80sqm Floor area

6.8x10.29m/11.8m Dimensions

2400mm Ceiling height

From $75,000+GST

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Horizon

A step up in size and flexibility, with 1, 2 or 3 bedroom configurations and a full-length terrace.

1-3 Bedrooms

1 Bathroom

1 Kitchen

60sqm Floor area

6.8x9m Dimensions

2400mm Ceiling height

From $60,000+GST

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COMPACT & AFFORDABLES Expander

Vista

Our entry-level Class 1A cabin — a smart, self-contained footprint available in 1 or 2 bedroom layouts.

1-2 Bedrooms

1 Bathroom

1 Kitchen

40sqm Floor area

6.8x6m Dimensions

2400mm Ceiling height

From $45,000+GST

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11.8m Studio

Isla

A long-format portable residence — open living, a wide glass threshold and a quietly resolved layout in 27m², wrapped in a weathered grey timber shell with a blackened steel frame.

1 Bedrooms

1 Bathroom

1 Kitchen

11.8*2.3m Dimensions

2400mm Ceiling height

From $44,000+GST

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9m Studio

Marlo

A smart, open-plan portable home — comfortable living area, full kitchenette and a private bathroom in 21m². Delivered fully built and ready to place.

1 Bedrooms

1 Bathroom

1 Kitchen

9*2.3m Dimensions

2400mm Ceiling height

From $36,000+GST

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6m Studio

Fable

Self-contained studio cabin — practical kitchenette, fully fitted bathroom and a comfortable living/sleeping area in 13.8m². Delivered fully built and ready to place.

1 Bedrooms

1 Bathroom

1 Kitchen

6*2.3m Dimensions

2400mm Ceiling height

From $23,000+GST

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	The Vista40sqm	The Horizon60sqm · Most Popular	The Meridian70–80sqm
Bedrooms	1–2	1–3	2–4
Bathroom	1	1	1
Kitchen	1	1	1
Floor Area	40m²	60m²	70–80m²
Ceiling Height	2400mm	2400mm	2400mm
Best For	Compact & entry-level	Growing needs	Full family layout
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 Class 1A model — no guesswork required.

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Is a Granny Flat a Class 1A Building?

In most cases, yes. Under the National Construction Code (NCC), Class 1a covers a single dwelling such as a detached house, and a self-contained granny flat built as its own dwelling is generally classified the same way. Put simply, a Class 1A building granny flat is a home built to full residential standards, not the lighter rules that apply to sheds and outbuildings. Your building certifier confirms the classification for your project.

Perth Dynamic Solutions builds Class 1A granny flats and Class 1A modular homes in Western Australia. Whether you want a Class 1A granny flat Perth homeowners can approve through their local shire, or a Class 1A modular granny flat to live in full time, rent out, or use as a secondary dwelling, every model above is engineered to the same standard.

Class 1A Building Requirements in WA

Class 1A building requirements come from the National Construction Code and are checked through your council's building approval process. For a Class 1A granny flat in WA, that means:

Energy efficiency and glazing: every Perth Dynamic Solutions Class 1A model is built to a 7-star energy rating with double glazing as standard.
Safety and services: AS3786-compliant smoke alarms, 40mm floor insulation and AS3000-standard electrics are built into every unit.
Approvals: A building permit is required, and planning approval depends on your block and how the home will be used.
Size: Under WA's Residential Design Codes, ancillary dwellings (granny flats) are generally limited to 70m². Our Fable, Marlo, Isla, Vista and Horizon models sit within that limit. The Meridian (70–80m²) is at or above it, so confirm with your council whether it suits your block as a granny flat or a primary dwelling.
Owner-builder rules: in WA, a registered builder or approved owner-builder is generally required where a building permit is needed and a habitable building is valued above $20,000, and electrical and plumbing connections must be done by licensed tradespeople. That's why our Class 1A process includes the owner-builder course, with our team handling the council paperwork.

What's Included

Premium inclusions.
No hidden extras.

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Premium as standard, not an upgrade

7-star energy rating, double glazing, a full window façade and stone benchtops come standard on every Class 1A model — plus a full roof, 2m verandah and eco decking.

$4,500 Flat-fee shire approval assistance (Ask for limited available stock)

One fixed, transparent fee — no hidden charges.

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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.

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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.

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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.

Class 1A Granny Flats Cost: What to Budget For

Our Class 1A granny flats for sale start from $23,000+GST for the 6m Fable studio and go up to $75,000+GST for the Meridian. Every model includes a 7-star energy rating, double glazing, stone benchtops and a full roof as standard. The 30ft and 40ft models also include a 2m verandah and eco decking; on the 20ft models these are an additional cost.

Vista (40m² expander): from $45,000+GST
Horizon (60m² expander): from $60,000+GST
Meridian (70–80m² expander): from $75,000+GST
Fable (6m studio): from $23,000+GST
Marlo (9m studio): from $36,000+GST
Isla (11.8m studio): from $44,000+GST

For a complete project budget, also allow for council approval assistance (a flat $4,500 fee), site preparation and service connections. Site costs vary with your block, so tell us your dimensions, and we'll give you a straight-up quote with no hidden extras. Finance options are available on our finance page.

The Process

Design it. Plan it. Build it.

Plan and Sign up

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

Owner builder's process

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

Council approval Submission

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

Building your Class 1A Primary or Ancillary dwelling

We select the finishes and colours of your choice.

Delivered and Installed

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

Class 1A Expandable Homes, Portable Homes and Tiny Homes

Class 1A doesn't have to mean a fixed, one-size build. Our Vista, Horizon and Meridian are Class 1A expandable homes: factory-built, delivered compact and opened out on site. If you're comparing a Class 1A home expander against a standard modular home, the opened layout gives you more living space from a smaller delivery footprint, which helps on narrow driveways and tight blocks.

See our Expander range for more.

If you're after Class 1A portable homes or a Class 1A tiny home, our Fable, Marlo and Isla studios are delivered fully built and ready to place, in compact footprints from 13.8m² to 27m². For Class 1A tiny homes Australia-wide, the difference is compliance: these studios are built to the NCC with the same standards as our larger Class 1A homes.

See our Studio range for more.

Class 1A Granny Flats in Western Australia and Australia-Wide

Every Class 1A granny flat West Australia customers order from us is engineered and built in WA, and we work with a council approval partner experienced across most WA councils. We also deliver Australia-wide, including Class 1A granny flat QLD projects. Council approval assistance is WA-focused, so if you're building interstate, tell us your council, and we'll confirm what's possible.

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 Class 1A model and get back with a straight-up, no-obligation quote.

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Class 1A Granny Flat FAQs

Still have questions? Contact us →

What are the key features of a Class 1A granny flat in Australia?

A Class 1A granny flat is a self-contained dwelling built to the National Construction Code, with its own kitchen, bathroom and living area. Key features include the energy efficiency measures the NCC requires, double-glazed windows and doors, compliant smoke alarms, insulation and electrics to Australian Standards. Our Class 1A models add a 7-star energy rating, stone benchtops and a full roof as standard, and the 30ft and 40ft models also include a 2m verandah and eco decking.

How much does it typically cost to build a Class 1A granny flat?

Costs depend on size, finish and site conditions. Our Class 1A models start from $23,000+GST for the 6m Fable studio and go up to $75,000+GST for the Meridian, before council approval assistance (a flat $4,500 fee), site preparation, and connections. Traditional site-built granny flats in Australia commonly cost well over $100,000, which is why factory-built options are popular. Send us your block details for a total project quote.

How much does a fully equipped Class 1A granny flat typically cost to build?

Every Perth Dynamic Solutions Class 1A model includes a kitchen, bathroom, 7-star energy rating, double glazing, stone benchtops and a full roof in the unit price. The 30ft and 40ft models also include a 2m verandah and eco decking, while on the 20ft models these are an additional cost. For a complete budget, add council approval assistance ($4,500 flat fee), site preparation, and power, water, and wastewater connections. As a guide, plan from $23,000+GST for a studio and from $45,000+GST for a one- or two-bedroom home before site costs, then get an exact quote for your block.

How do I find a reputable builder for a Class 1A secondary dwelling project?

Look for a builder or supplier that shows completed projects and customer reviews, explains exactly what's in the price, is clear about who manages council approval, and puts warranty terms in writing. WA Consumer Protection also advises paying only a small deposit upfront and linking progress payments to completed stages of work. Perth Dynamic Solutions offers a 2-year warranty, a fixed $4,500 approval fee, and a clear process from sign-up to delivery.

Which companies offer design and construction services for Class 1A granny flats near me?

If you're in Perth or elsewhere in Western Australia, Perth Dynamic Solutions designs and supplies factory-built Class 1A granny flats and guides you through the council approval process, with delivery Australia-wide. You act as owner-builder while our team organises the engineering, soil testing, BAL assessment and building certifier, then delivers and installs your home.

Can I finance a Class 1A granny flat through Australian lenders?

Finance is available through our third-party finance partner, with options from $120 a week. Approval, terms and conditions are set by the lender and depend on your circumstances. Apply or see current options on our finance page.