| Permanent modular home | Primary or long-term residence | Usually fixed to an engineered footing or foundation system | Habitable dwelling | May be proposed on vacant or already-developed land | A planning permit, DA or another state pathway may apply. Confirm zoning, overlays and local controls. | Building approval, certification and NCC evidence are commonly required. | Confirm water, wastewater, stormwater, power, access and installation requirements. | Council or planning authority, certifier or building surveyor, engineer and relevant licensed trades. |
|---|
| Secondary modular dwelling | Additional long-term dwelling on the same property | Usually fixed | Habitable dwelling | An existing approved primary dwelling may be relevant or required for the intended pathway. | May qualify for a streamlined pathway where every state and local condition is met; otherwise further assessment may apply. | Building approval and residential certification commonly remain necessary. | Check shared or separate services, wastewater, stormwater, access and possible infrastructure implications. | Council or planning authority, certifier or building surveyor, and service authorities where relevant. |
|---|
| Backyard office or studio pod | Work, study, creative or non-residential ancillary use | Fixed, relocatable or portable depending on the product | Usually non-habitable; sleeping, bathing or cooking can change the classification and pathway | Often located with an existing dwelling, but property and use requirements still need confirmation. | A minor or exempt pathway may be available in some circumstances. Confirm size, placement, use and local controls. | Building or structural approval may still apply, especially when fixed, serviced or used differently from the approved purpose. | Confirm power, data, plumbing, wastewater, stormwater and access requirements. | Council, certifier or building surveyor, and licensed trades for connected services. |
|---|
| Tiny home on wheels | Temporary accommodation or another moveable-use pathway | Moveable vehicle or caravan-style structure | Fitted for occupation, but not automatically approved as a permanent dwelling | An existing dwelling, building work or licensed park may affect available temporary-use options. | Local laws, camping rules, occupation duration and land use may need review. Do not assume wheels remove approval requirements. | Vehicle or caravan rules may apply while fixed residential use can trigger building and certification requirements. | Permanent utility connections, decks, footings and wastewater arrangements can change the assessment. | Local council or relevant state authority, plus a certifier or building surveyor if treated as a building. |
|---|
| Amenities or service building | Toilet, shower, bathroom or site-support facility | Fixed or relocatable | Non-habitable | Not always determinative; the wider site use and users of the facility matter. | May require planning review depending on location, permanence, public use and the broader site approval. | Building, plumbing, waterproofing and accessibility requirements may apply. | Water, wastewater, ventilation, power, accessibility and maintenance access should be confirmed. | Council, certifier or building surveyor, hydraulic consultant and licensed plumbing or electrical trades. |
|---|