Greestone House is SE of the cathedral and is situated off Greestone Place which is linked to Minster Yard. Its origins go back to the 13thc The summer house in the garden is a Victorian folly erected in 1860, which incorporates original Romanesque sculptural elements. The summerhouse is a rectangular building constructed against the W wall of the garden. It is of irregular squared blocks of stone and has decorative battlements. In the long W face is a central Romanesque doorway with some original material included. It is flanked by a pair of round-headed windows. Below the battlements on the W and N facades is a stringcourse set with corbels, and there are projecting corbels at the NW and NE angles. The N facade of the summerhouse has a central round-headed window, The dimensions of this folly are approximately 2.00 m. X 3.65 m. Since this report was written the summerhouse has been professionally restored. In the descriptions below, only genuine Romanesque features are described.

Greestone house was originally built c.1260 and was given to the Vicars Choral by Ralf of Swallow, perpetual Vicar of St Mary Somercotes 1292-95. The present building dates largely from the 17thc. Most recently it was sold as a large family home in 1999, and resold in 2024.

The dragon-head corbel on NW corner: The weathering on the piece suggests that it is not nineteenth-century work, although the iconography is unusual for twelfth-century sculpture of this type. There is an iconographic parallel on the so-called Schotten portal of St. Jakob in Regensburg, Bavaria.