A common question relating to the development potential of a residential property is if the property can be used for commercial purposes.
Generally most District Plans allow commercial activities within residential zones to a certain extent, but they usually specify a maximum threshold (such as a maximum number of vehicle movements associated with the commercial activity or the maximum number of employees involved in the commercial activity that do not reside at the property) below which, the activity is permitted (i.e. resource consent is not required) and above which, the activity will require resource consent.
Below are two examples, from the Waitakere City and Auckland City District Plans that illustrate such thresholds for commercial activities:

