A preservation easement is a legal agreement between the owner of a historic property and Historic Charleston Foundation that establishes perpetual protection for the property.

The Pogues subsequently donated a preservation easement to the Virginia Department of Historic Resources.

Mr. Darby suggested that someone who bought the house, for example, might request a preservation easement prohibiting any modification to it in return for a tax credit.

The house has now been meticulously restored and the Preservation Alliance of Minnesota holds a preservation easement on the property.

A preservation easement protects the house from demolition in perpetuity and restricts alterations to significant interior and exterior architectural features.

That house, which is now on the market, is the subject of a preservation easement that ensures it will remain as Johnson and his clients intended.

The last of the descendants of the builders, Mabelle Collins, in 1983 created a "preservation easement" that required that the house be kept in historical condition.

At that time, the Society negotiated a more specific preservation easement with the owner.

The conservancy plans to continue fund-raising to buy - or obtain options to buy - as many islands as possible, or to secure preservation easements on them.

Since then, he and other fox hunters have formed the Lamington Conservancy, which has been trying to get preservation easements from property owners.