The balcony collapse in Dunedin wasn't the result of a shonky building, but the Government is still considering making changes.

18 people were taken to hospital when the balcony on Castle Street collapsed during a Six60 concert on March 4th.

Building and Housing Minister Nick Smith said an investigation by the Ministry of Business, Innovation and Employment has found the building was up to code, but overloaded.

LISTEN ABOVE: Newstalk ZB's Matiu Workman speaks to Larry Williams

“The simple reason this balcony collapsed was that nearly twice the number of people it was designed to support were on the balcony, and many of those people were grouped at one end of it,” he said.

“The investigation has found the balcony was properly designed as per the Building Code of that time, was properly consented, was built to standard, and received a Code Compliance Certificate. Inspection and testing of the joists that failed has not identified any concerns about the standard of timber used in the construction.”

Dr Smith said the building code may need to change for such situations.

He said some buildings infrequently host people for Santa parades and concerts, and may need extra strengthening for that.