Council playgrounds were also designed to fit best with their user demographic, he said.
For instance, a redesign of Kensington Park playground would be done with a "sporty feel" because of the nearby sportsgrounds.
Overall, council playgrounds were safe, and he was not aware of many serious incidents in the past year.
While it was rare to get negative feedback, he had one complaint recently because a slide was too hot in the middle of the day.
"There's a certain amount of 'user beware' or common sense that has to be involved with that."
Occasional calls about broken glass or vandalised equipment were attended to within 24 hours, he said.
Statistics gathered by Safekids New Zealand show fall-related injuries, which include falling from playground equipment, are the leading cause of unintentional child injury resulting in hospital admission.
Between 2005 and 2009, more than 1700 children aged between 5 and 9 were admitted to hospital each year on average after suffering falls, according to data from the University of Otago. Boys were more likely to be hospitalised than girls and more than half of all fall-related child hospitalisations involved falls from playground equipment.
Safekids director Ann Weaver said primary school-aged children suffered the most injuries as they started to gain independence and became subject to less parental supervision.
"The attitude in New Zealand is ... 'she'll be right' and 'children need to take risks and learn from experience'."
However, recent research showed repeated "little taps to the head" from a fall in the playground, or playing contact sport such as rugby, could lead to brain injuries later in life, she said.
"Children's heads are more fragile at that age and we do need to be a little bit more cautious about trying to reduce these horrific fall statistics.
"We want to encourage active [parental] supervision - it's not sitting on the bench to the side reading the newspaper or having a coffee and chatting.
"It's actually being there next to your child or within reach and watching what they're doing." APNZ