BASIX categorises projects for assessment into three distinct residential building types:
Definitions of these dwelling types can be found in our BASIX definitions. If you are unsure which BASIX residential building type applies to your project, you may need to show your building plans to the council or PCA.
Example residential dwellings and BASIX building type
|Alteration and addition
|Single house on one lot
|Addition to existing house
|One part of semi-detached home
|Basement or an attic
|Residential flat building
|Secondary dwelling (Granny flat)
(change of use or next to existing principal dwelling)
|Two houses on one lot
| Secondary dwelling (Granny flat)
(conversion of existing habitable space)
|A new principal dwelling and a new Secondary dwelling (Granny flat)
A council or certifying authority may consider that an "Exhibition home" or "Display home", despite its short-term use as a sales office or other non-residential purposes, is capable of being sold and occupied as a dwelling. If so, BASIX will apply to the "Exhibition home" or "Display home".