An Auckland property developer doesn't believe changes to rules on building granny flats will add the 13,000 extra dwellings claimed by the Government.

Easing resource and building consents requirements for structures 70 square metres or less - was one of the Government’s first moves in office.

David Witburn says the number is more like 3,000.

"The reality is, it's a niche accommodation type, a granny flat. It's not everyone's dream to live in a granny flat, it can be very useful for extended whanau living."

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