The council has refused to identify the site or the developer, or say if any of the properties met the building code and had been signed off.
Yesterday, the Herald identified the site after a property investor said she recognised it from the videos and instructed her solicitor to cancel an agreement to buy at Silvermoon.
The Brick and Blocklayers Federation said based on the first video, it believed the properties were "potentially very dangerous".
Federation chief executive Melanie McIver said there was either insufficient or no grout (concrete) in places shown in the video.
This combined with footage showing strong cracking would suggest the building-code performance requirements of a B1 structure were not being met, she said.
"The building does not appear to be withstanding the loads from construction. The risk is that the walls could collapse," Ms McIver said.
Master Builders Association chief executive David Kelly said the first video showed work that flouted the law and he believed the properties were vulnerable in an earthquake.
Mr Hunter said the work on stage two was done by a subcontractor who had been fired after he discovered substandard work.
"I don't adhere to any bloody shoddy work. I have paid for three independent engineers to go through and have a look and today [Friday] I was on site with another engineer, with the council inspecting and coming up with a solution.
"Aesthetically it doesn't look any good, but we are coming up with a remedy," Mr Hunter said.
"Structurally they are still very sound houses and they will get their code of compliance. I will rectify whatever is required."
Silvermoon Park
• Developer confirms site is subject of shoddy-building video.
• Promise made by developer to fix problems.
• Council refuses to identify site or developer.
• Two professional bodies express concern about work on properties.
