After purchasing this oceanfront contemporary in Sagaponack for $6.7M back in 2007, the owners spent "nearly four years in planning and permitting" to transform the place into what you see today. They've added a bedroom, two bathrooms, increased the square footage, completely redid the interiors as well as the path to the beach, and went to town on the facade. Those coveted ocean views are still there, but judging by the previous listing photos, it also looks like they've installed an ocean-side swimming pool with a spa. The price for all these improvements doesn't come cheap. The owners are asking roughly $12M more than they shelled out five years ago.