After the war, Newman married his wife Catherine, and moved to Shenandoah County, Virginia. But as was true for many former Revolutionary War soldiers, the opportunities now available from the opening and early settlement of the Northwest Territory beckoned. Walter and Catherine Newman moved to Point Pleasant, now in West Virginia. There was a catch, however: in return for her agreement to move to the wilderness, Walter would need to build her a proper home. In 1796, construction of the “Mansion House” began, complete with two stories and a basement, and appropriately furnished.
Sadly, Catherine died in 1807. Walter transferred ownership of the Mansion House to his sons, and moved across the Ohio River to Gallia County. The Mansion House still stands today as part of the Tu-Endie-Wei State Park, and has been restored to its original construction by the Daughters of the American Revolution.