In the context of the heritage area in and around Balmain this extension
to a small cottage demanded careful consideration of the philosophy behind the
new intervention. Analysis of traditional built forms, usage patterns and
development codes led to a strategy of providing a contemporary interpretation
of the ever-decreasing volumes often evident in ad hoc additions of kitchens,
laundries and outside toilets that were often made to these original
structures.
Moving away from traditional usage patterns, the public penetration of
the private realm has progressed from the compartmentalised formal front rooms
to the more relaxed and inclusive realm at the back of the property. The area
closest to the entry now becomes the bedroom precinct and the back is a
fragmented indoor/outdoor public space bounded by the allotment fencing. Access
is via a central corridor that extends through the house right back to the rear
gate.
With local design guidelines requiring pitched roof forms the new
architecture grew out of the recognizable triangular shapes traditionally
associated with hipped roofs. The building also acts as a protective screen
creating a privacy hood blocking the views into the garden from the
neighbouring house. As the scale and dimension of the addition reduces towards
the back gate the external landscape is amplified and spliced into the informal
semi-internal spaces.
The folding forms create a canopy that provides shading in summer and
allows the northern sun to penetrate into the space for passive heating in
winter. The addition breathes new life into old under-used home
with 95% of the existing building fabric retained. The roof design
increases the rainwater harvesting capacity and the skylights foster a reliance
on natural daylighting. The spaces are naturally ventilated and the roof has
high performance insulation to minimise heat gain. The landscape concept
includes a deck area and large native garden eliminating the need for lawn.