A small group of protesters gathered outside the National Party conference on Sunday morning as John Key delivered his speech announcing a $1 billion housing fund.
A pen-type area had been set up at the Wigram Air Force Museum to try and contain protesters.
The conference was held at the Air Force museum, which is Defence Force land. Therefore any protesters jumping over the fence could be immediately issued a trespass notice and evicted.
Demonstrators displayed signs protesting about the Trans-Pacific partnership and the growing gap between rich and poor.
Mr Key wasn't interrupted and later told reporters he had a message for the demonstrators.
"They should look at what the Government has done over the last eight years," he said.
"Not everyone is going to support a National-led Government but our motivations are honourable and I think the results we have been achieving are good ones."
Mr Key said he still stood by the TPP.
"It allows New Zealand to have access to hundreds of millions of consumers... they're free to protest, this is a democracy, but I'm proud of the Government's record."