[4] Tŷ Gwyn House was built by James Ephraim Turner as his personal residence in 1906 in the Jacobethan style.

The house is constructed of Portland stone; with interior furnishings of Wainscot panelling made from Austrian oak.

[9] On 2 and 3 July 1908 a garden fête was held at Tŷ Gwyn to raise funds for the construction of the Baptist chapel at Llanishen.

The fête was opened by the Liberal MP Alfred Thomas: entertainment was provided by the artistes of Clara Novello Davies, the Llanishen Brass Band and the Capel Gwilym Choir.

[citation needed] To survey his ships transiting the Bristol Channel, Smith constructed an octagonal room on the roof of Tŷ Gwyn.