Treehouse Extension

Meanjin,
Carina Heights,
QLD
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About this home

With creative clients who had a desire to make their home better connected to the garden and climate, the “Treehouse” extension is a standalone addition at the southeast corner of the existing home to make the most of the northern aspect to the back garden and minimise blocking of views and daylight from the house.

Each space was sized carefully to build the least necessary (a key sustainability approach) with the least impact on the existing post-war house. Orientation, shading and openings optimise passive heating and cooling and materials were chosen for robustness and sustainability. The separate wing enables several generations to enjoy gathering at the home with quiet space for the owners to retreat to.

Q & A

What motivated you to build or retrofit sustainably?
My clients were keen to build for the long term with natural thermal comfort without airconditioning and better connection to their garden. The new carport was designed to accommodate a full solar array to power the home.
As an architect, the biggest thing that this extension did was connect its occupants to thir leafy, subtropical site, capture cooling breezes and sunshine and provide adaptability for working from home and accommodating visiting family and friends.
Type: Standalone house/townhouse
Project: Renovation or extension
Architect: Emma Scragg Architect
Designer: Emma Scragg
Builder: Williamson Builders
Size: 169 (including 76m2 new)m²
Bedrooms: 3
Bathrooms: 2

Sustainability Features

Building Materials & Envelope

High-performance insulation
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

Energy and Appliances

Rooftop solar PV
Dedicated wall-mounted EV charging
Efficient lighting (LED, daylighting, solar skylights)
Solar thermal hot water
Electric cooktop - induction/ceramic
Other energy-efficient appliances

Water & Waste Systems

Water-efficient fixtures

Landscape & Biodiversity

Native garden
Edible garden
Wildlife-supporting habitat

Climate Resilience

Cyclone/storm
Heatwave

Accessible & Flexible Design Features

Design for flexible use
Design for multigenerational living or dual occupancy
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