Llwyn-Madoc was built in 1747 (date on building), and may have been a rebuilding of an earlier house as the Thomas family owned Llwynmadoc from as early as 1676. The house was for a period used as a shooting lodge until it was extended from 1851 by Henry Thomas, who made it his principal residence. Further alteration was undertaken by Philip Tilden, architect, in the early-mid 20th century, whose main contribution was adding the mansard roof and inserting new dormer windows.

Reference: Cadw listed buildings database.
RCAHMW, 2009.