As an experienced granny flat builder, Unearthed Cabins builds every granny flat as a Class 1A dwelling, allowing them to be approved as secondary residences under current planning controls (subject to council requirements).
They’re suitable for a wide range of uses, including:
Unlike temporary or non-certified structures, Unearthed granny flats are designed for full-time occupation and long-term performance.
Every granny flat is delivered as a high-quality, turnkey home with features that support comfort, durability and compliance. Many homeowners exploring modular granny flats choose Unearthed for our focus on build quality, energy efficiency and long-term performance:
This combination ensures a granny flat that is efficient to run, easy to insure and built to last.
CERTIFICATION & COMPLIANCE
A quick side-by-side overview of the factors that matter most for approvals, comfort, insurance and long-term value.
| Feature | Unearthed Cabin (Class 1A, 7-star) | Non-certified Alternative |
|---|---|---|
| Legal Status | Fully NCC-compliant Class 1A dwelling. Approved secondary dwelling. | Often categorised as temporary or non-compliant structure. |
| Approvals | Eligible for CDC or DA. Faster, predictable approvals. | May require full DA or be refused entirely. |
| Energy & Comfort | 7-star NatHERS, insulated, airtight, low running costs. | Poor thermal performance; higher energy bills. |
| Insurance & Finance | Recognised permanent dwelling; easier to insure and finance. | Often refused by insurers and lenders. |
| Durability | Structural steel frame + 25-year warranty. | Shorter lifespan; no structural warranty. |
| Property Value | Adds long-term value, legally rentable. | May reduce value; may require removal before sale. |
Fully NCC-compliant Class 1A dwelling. Approved secondary dwelling.
Non-certified alternativeOften categorised as temporary or non-compliant structure.
Eligible for CDC or DA. Faster, predictable approvals.
Non-certified alternativeMay require full DA or be refused entirely.
7-star NatHERS, insulated, airtight, low running costs.
Non-certified alternativePoor thermal performance; higher energy bills.
Recognised permanent dwelling; easier to insure and finance.
Non-certified alternativeOften refused by insurers and lenders.
Structural steel frame + 25-year warranty.
Non-certified alternativeShorter lifespan; no structural warranty.
Adds long-term value, legally rentable.
Non-certified alternativeMay reduce value; may require removal before sale.
Send your suburb and lot details – we’ll guide you on approvals, sizing and the best pathway.
With major lenders now recognising certified prefabricated homes, financing a granny flat is more achievable than ever. Eligible projects may qualify for construction loans, depending on site and documentation.
Get a complete overview of our cabin designs, inclusions, energy ratings, and compliance – all in one easy-to-read guide.
Yes. Our granny flats are Class 1A dwellings and are legally recognised as permanent secondary residences when approved.
In many cases, yes. Rental eligibility depends on local planning rules, but certified granny flats are commonly approved for long-term rental use.
Most councils limit prefab granny flats to around 60 m² of internal floor area, though requirements vary by location and approval pathway.
Yes. A certified, compliant granny flat can improve usability, rental potential and overall property value.
Absolutely. Granny flats provide privacy, independence and proximity, with options for accessibility upgrades if required.
Granny flats are designed to make the most of compact living spaces. Through smart layouts and modular cabinet optimisation, kitchens and storage areas are carefully planned to maximise functionality without sacrificing comfort. This approach allows for efficient use of space while maintaining a clean, modern look.
Yes. Modular granny flats must meet the same building regulations and compliance standards as traditionally constructed homes. This includes structural requirements, energy efficiency ratings and local planning regulations to ensure the dwelling is safe, durable and suitable for permanent occupancy.
One of the advantages of modular granny flats is that much of the construction happens off-site while site preparation takes place at the same time. This parallel process can significantly reduce the overall timeline compared to conventional construction, allowing homeowners to move in sooner.
