Off Grid FZ House

Gundungurra,
Megalong Valley,
NSW
This home will be open for in-person tours on the 17th May 2026

About this home

Nestled in Blue Mountains bushland, Off Grid FZ House acts as a premium benchmark for sustainable living in coexistence with nature under extreme conditions. Unwavering commitment to holistic sustainable practice is at the heart of this project, humanising contemporary architecture through a connection with nature.

The conceptual contribution to the public domain is evident: sustainable design and building in bushfire-prone areas without access to services is possible with innovative and resilient measures. While the dwelling is private, public amenity is delivered through beautiful scenery of extensive bushland visible from the public domain.

Though the bush block spans acres, the built form remains modest, hence requiring minimal tree clearance for bushfire safety only. All such trees are reused on site, most notably for the internal structure as well as for the kitchen bench top and joinery, minimising manufacturing and transport of additional materials to the site, while giving the timber renewed purpose, showcasing their tremendous range of colours, textures and maturity.

With Off Grid FZ House being perched on a ridge, it boasts prospects across the valley, extended through the deck wrapping around the southern wing. The verandah roof affording a dual purpose, folding down to be used as a flame zone bushfire screen as required.

The functional performance of the dwelling meets the brief in providing a BAL-FZ (Flame Zone) resilient, net zero emissions home. Due to the project’s ground-breaking nature, it required a variety of specialists’ contributions, including engineers at Partridge as well as Bill Anderson, and bushfire and ecology consultants.

Costs were minimised through the modest footprint of the home and the reuse of timber from the site, and clever design strategies incorporated into the design ensures zero operational energy and hence zero costs.

The home is self-sufficient in terms of power, water and sewage.

No wheelchair access for this property

Q & A

What motivated you to build or retrofit sustainably?
Reducing our impact on the natural environment
Installing a heat recovery ventilation system as it greatly reduces the energy required to heat and cool the home while also providing filtered press air that can even filter out bushfire smoke when a carbon filter is utalised.
Even though the home utilises double glazing and received an independent 8.2 NatHERs star rating, we really didn't realise, until experiencing a winter, that the aluminium framed windows were a pour choice thermally. Wish we had have modelled the home using Passivhaus software and used high performance window frames.
Replace all the windows with BAL 40 UPVC windows and low-E glazing
Back to 2026 Homes
Type: Standalone house/townhouse
Project: New build
Architect: Simon Anderson / Anderson Architecture
Builder: Against the Grain to lock up
Size: 100m²
Energy Rating: 8.2 NatHERs
Bedrooms: 2
Bathrooms: 1

Sustainability Features

Building Materials & Envelope

Draught-proofing/air sealing
High-performance insulation
Double or triple-glazed windows
Sustainable or low-impact materials
Recycled or reused materials
Other

Heating, Cooling and Ventilation

Passive heating/cooling (north-facing glazing, cross ventilation, thermal mass, shading, etc.)
Ceiling fans
Heat pump (reverse-cycle) heating/cooling
Heat pump-powered hydronic heating
Mechanical ventilation with heat recovery (MVHR) system

Energy and Appliances

Rooftop solar PV
Battery storage
Dedicated wall-mounted EV charging
Energy monitoring/smart home systems
Efficient lighting (LED, daylighting, solar skylights)
Heat pump hot water
Electric cooktop - induction/ceramic
Other energy-efficient appliances

Water & Waste Systems

Water-efficient fixtures
Rainwater tanks

Landscape & Biodiversity

Native garden
Edible garden
Wildlife-supporting habitat

Climate Resilience

Bushfire
Cyclone/storm
Heatwave

Accessible & Flexible Design Features

Design for flexible use
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