As a general contractor based on Chappaquiddick, Richard S. Knight Jr. recognizes that the Vineyard will inevitably reach a point where all the land is accounted for and there is no more room to build.

"We're an Island, and there's only a finite amount of land left, so eventually we'll hit buildout," Mr. Knight said. "Sooner or later, it's going to come. And I think we're coming down to the end of it."

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