Llan Ffestiniog

Situated in the square opposite the Pengwern Arms, is the oldest dwelling and established business in the area, Meirion House, a Grade II* listed building. Its name is derived from the county of Meirionydd, and the core of the building is thought to date back to 1411. Several annexes were added on over the years, with a business established in 1726. It has nevertheless retained much of its original character, including the original pitch pine and oak beams and lath and plaster ceiling, slate floors and inglenook fireplace with inset cast iron double oven. There is a headstone inlaid in the slate floor, part of which is under the second stairway, believed to have been constructed in the late 19th century.

Part of Meirion House was once a small drover's bank, known as Banc yr Ddafad Ddu ("The Bank Of the Black Sheep"). In the early 19th century, it was a drapers shop. In the early 20th century, it became a guest house with the original visitors book dating back to 1909. It was used extensively by cyclists and was at one time the official quarters of the National Cyclists Union (NCU). In the visitors book there is an entry referencing the ghost of "Elizabeth". The house was owned by Thomas John Wynn, 5th Baron Newborough until 1925, when it was sold to Robert Thomas Williams. During World War II, officials from the National Gallery stayed there, whilst working at the Cwt y Bugail quarry, which was used to house the nation's art galleries' treasures. The houses next door were built on the site of Abbey Arms, an old coaching inn, which once had its own stables.