Passiv Laneway – certified passive house

Freshwater,
New South Wales
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About this home

This compact granny flat sits atop an elegant garage on a discreet laneway on the Northern Beaches of Sydney. A tightly manipulated building envelope ensured Council compliance on a tight site.

This home, and its simple presentation to the street disguise the elegance and comfort that is so often missing in these pieces of gentle densification.

The floating home calls for a simple aesthetic, blank side walls are clad in dark standing seam to match the roof while the more visible long elevations are a blackbutt cladding treated to age over time.

The garage below is made from a split face concrete block, both beautiful and practical at the same time. The contrast between the simplicity and heaviness of the base and the floating top works well. This building will definitely settle well into its new home over the first few years.

The industrial checkerplate staircase provides for a dramatic entry with sky views before arriving on the shielded entry deck.

The home is the third certified passivhaus in Sydney and Envirotecture’s second.

The timber/aluminium windows and door with their double glazing are part of a well insulated airtight building envelope. The heat recovery ventilation system ensures fresh air 24/7 although the doors can often be found open a gorgeous autumn day.

Extensive use of timber is both a more sustainable option and comforting in the compact space. The treetop views afforded by the elevated position give this granny flat a sense of space that belies its true size.

Some other features include:

–          Kitchen cupboard doors are recycled PET and recycled timber

–          Bathroom & kitchen tiles were salvaged

–          Hardwood offcuts were used for handrail, fence and garden edging

–          The water tanks feed the washing machine, toilet and garden

–          Clad in timber from a sustainably managed forest

Q & A

What motivated you to build or retrofit sustainably?
Type: Secondary dwelling
Project: New build
Architect: Envirotecture
Builder: Dave Selby - IMAC Constructions
Size: 60m²
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

Heating, Cooling and Ventilation

Passive heating/cooling (north-facing glazing, cross ventilation, thermal mass, shading, etc.)
Ceiling fans
Heat pump (reverse-cycle) heating/cooling

Energy and Appliances

Rooftop solar PV
Efficient lighting (LED, daylighting, solar skylights)
Heat pump hot water

Water & Waste Systems

Water-efficient fixtures
Rainwater tanks

Landscape & Biodiversity

Native garden
Edible garden
Beehives
Wildlife-supporting habitat

Climate Resilience

Accessible & Flexible Design Features

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