The Big House, also known as Landshipping House, is a historic house on the banks of the River Cleddau in Landshipping, Pembrokeshire, Wales.
The house was originally built in 1750 and owned by the Owens of Orielton who were the Landshipping Coal Agents. It was constructed using stone and roof materials from an older, ruined inland mansion. This building would have been a simple rectangular design with an entrance facing south-west, before several alterations occurred. The final alterations occurred in 1830 by architect William Owen. Owen added a third storey to the western wing and moved the entrance to the North façade, between two bows that were added at the same time to look out over the River Cleddau. His design was inspired by Slebech Hall and Picton Castle. The house remained occupied until the late 1800s when it fell into disrepair and by 1890 it was a ruin. However, the cottages at the rear remained lived in until the 1970s. In 1922 the Landshipping Estate, including Big House, was sold at auction.A document from 1857 described Big House as having "Bed Rooms, Hall, Parlour, Dining Room, Drawing Room, Nursery, Library, Servants Offices, Range of Stabling, Coach House, Saddle Room & Granary Over Yard, External Walled Garden, Orchards," and a wood set in nearly 6 acres. The property is now set in about 2 acres.