The artworks will be exhibited, "hopefully", at Wellington Airport for about a month, then auctioned off.
McIntosh said if the artworks could not be exhibited at the airport, they would have them at another prominent place in Wellington.
The rebuild is expected to take about 14 months, and the $700,000 is not urgent.
"We've got enough to start the building and get the building into public use," McIntosh said.
They plan to "carefully chop off" sections of Dside's mural before the building is demolished.
Information on other fundraising projects will be available on the website forthesea.org.nz later this week.