My brother, sister and I own a 40 acre tract of land in Chatham County, NC, to which the only access if through a neighbor's land. We have a 15 foot wide easement for this purpose granted by the neighbor 4 decared ago. We have considered selling the land, and a factor in the value is whether or not it can be developed into a residential subdivision. I've been advised that it cannot, at least in part, because the 15 foot easement is not wide enough to accommodate the size road necessary for such a development. One of my siblings claims that the 15 foot easement can be increased in width by us, unilaterally, if needed to build a subdivision on the land. It is my contention that we have access (and thus are not landlocked), so they are not obligated to grant us a wider easement. The matter has become important because my sister intends to block any attempts to sell the land for the appraised value, in the belief that the property is worth twice as much because it can be developed for higher density use that it really can be (if, in fact I'm right). Am I right? (And I hope I'm wrong, because clearly it would increase our property value.