Llwyn-Ynn Hall is a three-storey long stone house of the early 17th century. The house is of an irregular plan and elevation, built of stone with a slate roof, 17th century stair and turret. It has mullioned and transomed windows, which decrease in length and breadth in each storey. The entrance doorway in the middle of the south front was altered around a century after its erection, the present doorway being round-headed with fluted columns. A shield above it is dated 1672, and is charged with a cross fleury engrailed between four choughs. A further shield is present bearing three boars' heads impaled with a lion rampant guardant, and the letters WKP for William Parry and his wife Katharine. The main building was destroyed in the 1950s, but some ancillary buildings survive.

Associated with LLwyn-Ynn Garden (Nprn 266403) and Llwyn-Ynn Hall Gate Piers (Nprn 27546)
Source: DE/DOM/Sj15SW, from a note by P. Smith, RCAHMW and and an entry in the Denbighshire Inventory.
J. Archer, RCAHMW, 16.09.2004