Single Dwelling housing –
A single dwelling house is one individual (separate or attached) dwelling house on a separate lot.
Examples include separate detached houses, one of a pair of semi-detached houses or a single attached house (townhouse) where each dwelling is separately titled, though they may share common infrastructure.
Multi Dwelling housing –
A number of dwellings (whether attached or detached) on one lot of land, each with access at ground level.
Examples include dual occupancy, villa units, attached houses (townhouses) and secondary dwellings. Development can be strata titled and can include common areas and common infrastructure.
Where a unit building is attached to a row of townhouses, enter the number of unit buildings and other dwelling houses separately.
Residential Flat Building –
A Residential flat building is a building containing 3 or more dwellings on one lot of land.
Examples include apartments and units that have other dwellings above or below, often with shared access and common areas. It does not including attached dwellings or multi-dwelling housing
Your Local Council’s Development Control Plan
Your Local Council’s Local Environment Plan