The origins of Cossington Park date back to the 16th century when it began as a humble two-room dwelling. Remnants of this early structure remain in the form of four dark oak rafters, now hidden within the loft, offering a tangible link to the past.

During the 17th century, significant additions transformed Park House, including the addition of the northern wing, which housed the original kitchen and the Trusty Servant bedroom.

An eastward extension included what are now the Chaucer bedroom and the old Drawing Room.

In the 19th century, further enhancements were made, including the addition of French windows in the Drawing Room and Dining Room. The Drawing Room’s striking fireplace remains a unique feature, reflecting the house’s continuous development over time.

The most notable transformation came in 1901 under the stewardship of the Rev. Allen D Graham, Owner/Guardian Graham Wason’s great-grandfather. Known for his philanthropic work, Graham founded the Invalid Children’s Aid Association (now I-CAN) in 1888, a charity supporting children with communication difficulties. To fund his mission, he sold the adjoining manor, Cossington Grange, and a significant portion of the family’s art collection.

Today, a bronze sculpture in the grounds by a local artist commemorates his legacy, while a trompe l’oeil mural near the children’s play area recalls the lost view of Cossington Grange.