About 300 mostly uninsured Christchurch property owners in the red zone are threatening legal action if the Government does not make an offer on their homes.
Quake Outcasts spokesman David Millar said the group represented people who had been told to get off their property with no Government offer.
"We are very worried and people are very vulnerable. These people have all sorts of reasons for not having insurance," he said.
Since its foundation last August, Quake Outcasts has joined forces with WeCan and other residents' groups from the red zone.
They have organised petitions, written letters and run advertisements calling on help from the Queen.
Millar said if an offer was not made, the group would take things further.
Attitudes towards the uninsured contain an "element of punishment" and a sense that they got what they deserved, he said.
"We understand that people are taking a risk without insurance, but that's different to being told to leave perfectly liveable houses without being offered anything," he said.
Millar said one elderly woman in the group did not have her insurance renewed after 60 years of payments because she was sent the wrong house description.
"It was wrong, so she didn't pay it. Now she has nothing."
Attempts to negotiate with the Canterbury Earthquake Recovery Authority and Christchurch MPs had failed, Millar said.
The Government's offer to red-zone residents is available only to those with insurance.