How long before our new home in Orlando is beachfront property? How much longer before it’s submerged. I don’t know the exact altitude in Orlando, but it’s roughly 20 feet. If all the ice on Greenland melts it will raise sea level by 23 feet. There are no accurate models for how fast that might happen, but melting ice from Greenland is now the single largest contributor to rising sea levels. If you want to help preserve the future value of our near-sea-level home, check out carbonfund.org. It might help out the polar bears and the hundreds of millions of people who live within a few feet of sea level around the world too.