Political parties taking part in the coalition negotiations after the election asked for information on everything from the cost of NZ First's wish for an Auckland to Northport rail to the Green Party's request to build a new refugee resettlement centre outside Auckland and on the costs of immediately halting all permits for new coal mines, offshore oil drilling and fracking.
The State Services Commission has released the information it provided to the parties during the negotiations.
Those negotiations took place over a fortnight after the final election results were known between Labour and the Greens, Labour and NZ First and National and NZ First.
NZ First eventually opted to go into coalition with Labour with the Green Party as a confidence and supply support partner.
Parties involved in such negotiations over policies can seek information from officials to help the process and the release shows the Green Party made most use of this.