Later in the twentieth century, the mansion and surrounding property served as the campus for Barrington College and the Zion Bible Institute.

The initial 1905 segment (the current eastern wing) was designed by Martin & Hall, an esteemed Providence architectural firm.

With captain Myles Standish, Governor William Bradford and others, Joseph Peck purchased a tract of land located between Narragansett Bay and the Taunton River in 1641 from Massasoit (or Ousamequin Sachem).

Two-and-a-half stories in height, the house was built of rough masonry granite with segmental relieving arches over the windows and doors.

With Peck's expanding interests and activities, a larger residence was constructed between 1927 and 1928 north and west of the original section, forming a U-shaped court facing south; this major addition was more medieval in appearance but maintains the basic massing, height, and materials of the 1905 unit.

Peck devoted as much energy to his avocation of book and manuscript collecting as to his business and political career; he was deeply interested in New England history.

[4]Peck's manuscript library was one of the finest private collections in the country at the time, it included multiple sets of signers of the Declaration of Independence, two complete sets of letters signed by presidents while in office, and a more unusual collection of letters by the wives of multiple presidents.

Other areas of collecting interest included Roman and Phoenician glass, Native American artifacts, and eighteenth-century English portraiture.

In 1944, Frederick Peck arranged to leave Belton Court to the Providence Homeopathic Hospital (now known as the Roger Williams Medical Center), of which he served as president for many years.

During the mid to late twentieth century, large portions of the former estate grounds that surrounded Belton Court were sold off for the development of single-family housing.

[9] In 2011 a Massachusetts-based investor, ShineHarmony Holdings LLC, won a bid for Belton Court at auction for about $3.5 million and proposed to preserve the property as adaptive reuse for elderly housing, assisted living, skilled nursing, and memory care.

[9] In September 2022, ShineHarmony indicated plans to pursue the demolition of Belton Court; many town officials and locals expressed major concern for the future preservation of the mansion.

[17] In January 2023, ShineHarmony released an updated plan that called for a large scale residential development be constructed on the 36.9-acre parcel.

The development- referred to as “Belton Court Village"- would also contain pocket parks, civic buildings, and small commercial spaces.