This includes units, townhouse rows and subdivisions.
The BASIX assessment tool assesses the sustainability of building designs for multiple home developments by examining the Water, Energy and Thermal Comfort. The BASIX assessment tool multi-dwelling section is specifically designed to suit larger residential developments, especially for unit blocks with common areas such as car parks, lifts and shared gardens which can require significant amounts of water and energy.
New dwellings – multi-dwellings
This tool allows registered users to generate a BASIX certificate if the project involves more than one dwelling, or the development includes common property or services shared with other new or existing development. Typical project types include:
- a residential flat building - generally three or more units to be strata titled (typically class 2 buildings in the National Construction Code) buildings in the National Construction Code)
- two or more terrace houses, row houses or semi-detached houses, with or without common property or shared services
- two or more detached or attached houses, including villa units and dual occupancy dwellings on one parcel of land with common property and/or shared services
- several single dwellings on land subject to subdivision to create new separate lots.
For more information on using BASIX for subdivision projects and large, multi-unit developments, refer to the help note on When is more than one BASIX certificate required?
Note that the DIY method for thermal comfort assessment cannot be used for multiple dwellings. An accredited assessor is required to complete the thermal comfort section using software accredited by the Nationwide House Energy Rating Scheme (NatHERS).
Sustainable multi-unit features encouraged by BASIX
E1 Light shelves for improved natural lighting
E2 Solar hot water system
E3 Natural light in kitchen and bathroom areas
E4 Compact fluorescent lights with timers in common area lighting
E5 Energy efficient appliances such as refrigerators
E6 Ceiling fans for cooling
E7 Carbon monoxide monitoring to regulate carpark ventilation
E8 Insulated hot water pipe
E9 Energy efficient pool and spa heating
E10 Clothes line on louvred balcony to reduce need for electric drying
E11 On-site electricity and heat generation (cogeneration system)
W1 Storm/rainwater col lection for toilet and garden use
W2 4 STAR rated appliances such as washing machines and dishwashers
W3 3 STAR rated water fixtures - dual flush toilets, shower heads and taps
W4 Native, low water use landscaping
T1 Passive solar orientation
T2 Insulation in ceiling and walls
T3 Cross ventilation allowing air to flow through units, reducing the need for air conditioning
T4 Performance glass
T5 Roof overhang, window eaves, pergolas and louvres to reduce sun's heat