Mostly 19th Century, but incorporating older work. Howell Harris claimed in 1759 to have built Pontywall House. The house has a castellated parapet and Gothic style mullioned windows and arched headed doors and windows. It was in use as a tuberculosis sanitorium, and later, the staff accommodation, after a purpose built 'South Wales Sanatorium' was built nearby, c.1920.

Associated with:
Park/gardens (Nprn86103).