LATEST ARCHITECTURAL PROJECTS/ from Adelaide Architect, Warwick O' Brien

A unique aspect

Unley SA 5061
Completed: December 2009
Cost range: $1.5 – $1.7M

The unique aspect of this project is the narrow nature of the site. Two semi-detached units have been designed within a total site width of 12 metres. This means that each unit is no wider than a double garage!
The challenge was increased by the fact that the narrow frontage faced north, making it more difficult to create a development that attained a high level of sustainability.
The small courtyards of each unit allow the maximum exposure of each room to light, a view to the lap pool and to a northerly aspect. Font and rear courtyards create a sense of openness that belies the narrow nature of the site. to increase flexibility of use the garages have been finished to a high level so that they can double as an extension of the rear deck via cafe doors that open to the deck.


  • Plan shape to optimise solar access
  • Pool waterfall creates passive cooling source
  • Thermal mass in floors (polished concrete)
  • Liquid pool cover reduces evaporation
  • 16,000 litre rainwater tank under garage floor
  • Double glazing to all windows
  • 1.5 K/W photo-voltaic array
  • Gas boosted solar hot water system
  • Motorised solar pergola to north deck
  • Thermal mass in internal walls
  • Sunshading to windows
  • Sweep fans
  • Sloping ceilings with high level awnings
  • Low flow shower heads and dual flush toilets
  • Natural cross ventilation to all rooms
  • High levels of insulation in walls, ceilings, roof


Rendered Powerpanel on stud frame with 2.0 insulation
Party wall – 200 concrete filled block with two layers of sound rated plasterboard both sides and insulated
Colorbond corrugated metal sheeting
Alucobond fascias and soffit
Polished concrete
Clear anodised commercial section
Aluminium frames with double glazing