Oceanfront Beaux Arts Chateaux.

Architecture: symmetrical limestone façade, tall arched windows, ornate central pediment/entry, and a steep slate mansard-style roof with dormers and copper detailing—hallmarks of Beaux-Arts “Gilded Age” design.
Site & layout: set on a rocky coastline with sweeping ocean views; the house is oriented to maximize the waterfront frontage.
Grounds: formal terraced gardens with balustrades, a central oval fountain court/turnaround, and a long rectangular pool on a lower terrace with stone steps down toward the shore.
Image source note: the BuildGreenNH.com watermark suggests it’s from a builder/real-estate portfolio image.