Those included cutting a window into the front gate, removing a shelter from the fence perimeter, adopting a club rule to address the issue of people taking shelter at the property, removing a barrier arm, and removing closed-circuit TV cameras.
In response to a question from Cr Michael Laws, the council's legal officer Paul Drake said the Hells Angels had carried out the first three measures, and had indicated they would carry out the last two.
Mr Laws said a timeline needed to be established to ensure the club completed the remaining items.
Most councillors supported the mitigating measures taken by the Hells Angels.
Cr Sue Westwood reminded councillors that the fence, which was erected in 1984, was fully compliant.
"There has never been any breach of their resource consent. Once people are compliant, we need to tread very carefully.
"We also need to remember that these people have made concessions."
Cr Rob Vinsen noted that most of the residents in Kaikokopu Rd did not have a problem with the fortifications, and were happy for them to remain.
He also said the police had not come up with any serious offence that happened at the property.
Councillors voted unanimously to revoke the council's January decision, and to defer its application to the court, on the condition no criminal activity took place on the property.
The resolutions noted that if criminal activity did occur on the property, the joint application to remove the fortifications would be lodged with the court. Three Hells Angels members were present at the meeting.
They listened intently to the council discussion but did not speak.
They declined to comment after the meeting.