Zoo and Aquarium Association accreditation manager Nicolas de Graff spent half a day with the husbandry team in August last year, inspecting the facility, animals and speaking with staff.
Ms Fry said he was really thorough and quizzed staff on their practices.
The accreditation was issued in February and arrived in the mail in April and is valid for three years.
The report summary uses a traffic light-type system to score the facility in four categories - nutrition, physical, environment and behaviour. Each categories has sub-sections.
A blue mark means the practice contributes towards positive welfare outcomes for the animals, green is neutral and red is negative.
Kiwi North received predominantly blue scores and no red.
The nutrition category was entirely blue and Ms Fry said it was in part due to there being a nationally set diet for kiwi and Flash the tuatara getting his bugs dusted in calcium, "like icing sugar on a doughnut".
Ms Fry said as a charitable trust, resources were always a concern and having this report gave them integrity.
"We are constantly seeking funding in the form of grants and having this accreditation certainly supports those, validating the quality of the organisation they are considering funding."
She said the comment in the report which states "the enclosure can be recognised as an environment other organisations may wish to aspire to" is particularly gratifying.
The ZAA accreditation programme shifts the focus from making sure animals are not experiencing negative welfare states, to focusing on delivering positive welfare states.
ZAA president Kevin Tanner said the programme celebrated and validated animal welfare states.
"This means the wider community can be certain that ZAA member institutions provide the best level of care for their animals, not just a minimum standard."