Zen Architect's formula for a winning sustainable building included maximising a small urban 121 sqm site, with the two bedroom home's comprising a footprint of only 77 sqm.

The ‘upside down’ design places the bedrooms on the groundfloor where the thermal mass and high performance insulation provide a bunker-like sleeping environment.

The form of the building grows to the north—facing lane to maximise sun penetration for passive heating, while clerestory window of glass louvres pops up to the south to catch cooling southerly breezes. A 1.4 kW solar photovoltaic array generates more electricity than the house uses.

If you think you have a project to rival Brunswick Lane Solar House, you should enter the 2010 BPN Sustainability Awards.

Categories in the 2010 BPN Sustainability Awards include:

- Single Dwelling (New)

- Single Dwelling (Alterations & Extensions)

- Multi-Density Residential

- Small Commercial

- Large Commercial

- Office Fitout

- Public Building & Urban Design

- Landscape Design

Projects must have been completed in Australia in the period January 1, 2009 to June 30, 2010. Products or services being entered in the Innovation of the Year category must have been launched in the same period.

Entries close July 30, 2010.

The 2010 BPN Sustainability Awards are sponsored by Australian Forestry Standard, Gyprock, Hebel, Stormtech and Vergola.

Visit www.bpn.com.au/awards.aspx or e-mail [email protected] for more information on the awards programme.