Penrhyn Castle is a Norman Revival castle in Bangor, Gwynedd, Wales, and a filming location for House of Guinness (2025-). Built in 1837, it was designed by Thomas Hopper, and is Grade I listed. It is owned by National Trust.
Location: Llandygai, Bangor, Gwynedd, Wales
Verified facts
- Located in Llandygai, Bangor
confidence 70/100 · 2 recorded source groups · SRC-2508, SRC-2509 - Designed by Thomas Hopper
confidence 80/100 · 6 recorded source groups · SRC-2509, SRC-2510, SRC-3944, SRC-6776, SRC-6777, SRC-9087 - Built in 1837
confidence 70/100 · 2 recorded source groups · SRC-2508, SRC-2509 - Architectural style: Norman Revival
confidence 70/100 · 2 recorded source groups · SRC-2509, SRC-2508 - Historic designation: Grade I listed
confidence 80/100 · 5 recorded source groups · SRC-2509, SRC-2510, SRC-6778, SRC-6779, SRC-9088 - Owned by National Trust
confidence 95/100 · 6 recorded source groups · SRC-2509, SRC-2510, SRC-3944, SRC-6780, SRC-6779, SRC-9089 - Appeared in House of Guinness (tv, 2025-)
confidence 70/100 · 2 recorded source groups · SRC-2508, SRC-2511
Evidence & sources
- SRC-2508 — National Trust — Penrhyn Castle and Garden (Tier 1, official_site; retrieved June 2026)
- SRC-2509 — Cadw listed building record (via British Listed Buildings) — Penrhyn Castle (Tier 1, official_archive; retrieved June 2026)
- SRC-2510 — Wikipedia — Penrhyn Castle (Tier 3, encyclopedia; retrieved June 2026)
- SRC-2511 — North Wales Live — Netflix show House of Guinness filmed at North Wales castle (Tier 2, news; retrieved June 2026)
- SRC-3944 — gov.uk (Tier 3, reference; retrieved June 2026)
- SRC-6776 — Archiseek – 1845 Penrhyn Castle, Wales (Tier 3, architecture reference; retrieved June 2026)
- SRC-6777 — Histories and Castles – Penrhyn Castle: Neo-Norman Splendour Above the Ogwen Valley (Tier 3, history article; retrieved June 2026)
- SRC-6778 — Welsh Histories — Penrhyn Castle: A Polarising Reputation (Tier 3, article; retrieved June 2026)
- SRC-6779 — Castle Crawl Cymru — Penrhyn Castle (Tier 3, reference; retrieved June 2026)
- SRC-6780 — Art Fund — Penrhyn Castle (Tier 2, arts charity / museum guide; retrieved June 2026)
- SRC-9087 — National Trust Collections — Penrhyn Castle and Garden (Tier 1, official_archive; retrieved June 2026)
- SRC-9088 — The Gatehouse Gazetteer — Penrhyn Castle (Tier 2, reference_gazetteer; retrieved June 2026)
- SRC-9089 — Bangor University — Footsteps: Penrhyn Castle (Tier 2, academic; retrieved June 2026)
How we verify
The entries above show the sources and confidence scores recorded in our fact ledger.
Source tiers are internal classifications, not guarantees of accuracy or independence.
Several sources may repeat the same underlying account; a source count alone does not establish independent corroboration. We show the
street address only for non-residential public landmarks (museums, commercial and civic buildings,
publicly documented filming-location sites); the exact addresses of private residences and any
personal information are structurally barred from publication. Last reviewed June 2026.
Frequently asked questions
How is Penrhyn Castle connected to House of Guinness?
Penrhyn Castle, in Bangor, Gwynedd, has a documented connection to House of Guinness. Read the sourced facts on this page for the type of connection.
Who designed Penrhyn Castle?
Penrhyn Castle was designed by Thomas Hopper.
Where is Penrhyn Castle located?
Penrhyn Castle is located in Bangor, Gwynedd.