Project Stats:
- Location: Queanbeyan–Palerang Shire, NSW (near Mount Budawang)
- Land Zone: RU1
- BCA Classification: 1a Dwelling + 10a Garage
- 4 Bed dwelling - GFA: 350 m² (3 x Modules)
- Projected building area: 448 m²
- Bushfire rating: BAL-29
- Envelope: Passive House Standard / Airtight
- Systems: Thermal & Off-grid Solar PV
Located in country NSW, this project sits elevated on the highest point of a bush property, surrounded by views to Mount Budawang, the forest, grassland, and the natural contours of the site. Julia Thomas designed the dwelling as a series of three prefabricated modular modules linked by a double-storey entry lobby, connecting the garage, cellar, laundry, and plant room. The tripartite layout breaks the overall mass into smaller forms and creates two sheltered courtyards that follow the site’s contours.
The prefab superstructure is built from wood fibre timber construction, a natural insulation system with a negative global warming potential. By storing more CO₂ than is emitted during production, the material actively reduces atmospheric carbon while providing high-performance thermal comfort. The floor structure combines a suspended concrete slab with slab-on-ground elements, delivering durability and thermal stability.
The project is targeting Passive House Classic PER (renewable) certification, with Pods 1–2 and the entry link certified as one thermal envelope and Pod 3 certified independently. External shading reduces solar heat gain, and two north-facing windows were adjusted to improve thermal performance. Triple-glazed Gealan S9000 window systems have been selected for their superior performance within the prefabricated building modules.
A solar-powered automated hydronic radiant system provides highly efficient heating, cooling, and instantaneous hot water. By using solar energy as the primary energy source, the system can reduce overall energy consumption by up to 80%.
Together, the high-performance envelope, renewable energy systems, and careful detailing create a comfortable, low-carbon home that meets the rigorous international Passive House standard. The building is modelled at 0.6 ACH at 50 Pa, to be verified by a blower-door test upon completion.
With the project being BAL-29 rated, fire sprinklers are installed to the roof area. The property is completely off-grid, with a solar PV system to two roofs of the property and batteries within the garage.
The feature of the building is the north-west facade, where Mount Budawang is duplicated on a handmade terracotta mural featuring the view to the building. Each corner of the residence has handcrafted features within the stone detail. The interior FFE finishes have been designed by Concept Interior Design. The project has been managed as Owner Build, site managed by KPW Solution with assistance by the architect to ensure the design outcome.