The Royal Commission on the Ancient and Historical Monuments of Wales (RCAHMW) noted the dramatic hipped roof.

[2][4] The house underwent further expansion in the late eighteenth century, after the Lydart estate saw a significant influx of wealth from the wars with France.

[5] The house's chapel is designated as a site of historical interest by CADW due to its rare fleur-de-lys decorative plasterwork and hidden staircase, which may indicate early ecclesiastical use.

[9] Ty Mawr is a convent run by the Society of the Sacred Cross in a secluded location at Lydart.

The community was established at Ty Mawr in 1923, and today consists of about ten professed sisters, with several oblates and associates.