Palm House including former Eagle House is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 8 September 1998. Palm house. 1 related planning application.

Palm House including former Eagle House

WRENN ID
mired-wall-finch
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
8 September 1998
Type
Palm house
Address
Palm House including former Eagle House, Glynllifon, Llandwrog, LL54 5DY
OS grid reference
SH 455 554
Coordinates
53.07362, -4.30667
Source
Cadw listing

Also on this page: related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The Palm House, which includes the former Eagle House, is a single-storey building featuring a slate roof that is partly glazed. It has a dentilled cornice above tall windows on either side of the central entrance, which is flanked by paired 4-pane windows. The entrance is accessed through double doors. On the right gable end, there is a tall round-headed window that has been blocked with red brick, likely when the Eagle House was added. The left gable end features a high-level door and an opening at the base that leads into a sub-terranean storage chamber.

Inside the courtyard, there are two classical statues that have been relocated here, likely from the terrace, along with slate slabbed plant pots that were once used for growing palms.

The interior consists of a 3-bay layout with bolted trusses. The Eagle House originally included a cave and pool for an eagle.

Local climate

Palm House including former Eagle House sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.

It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • No EPC on record for this property
  • No sale records on file
  • Related listed building consents — 1 application
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Eastern Walled Kitchen Garden Grade II 12 m
  2. Inner arched entrance to courtyard between Palm House and Workshops Grade II 16 m
  3. Gardener's Cottage and attached archway to south of Kitchen Gardens Grade II 21 m
  4. Rubble-walled trackway to north of service drive to west of Glynllifon House Grade II 29 m
  5. Footbridge over service drive to west of Glynllifon House Grade II 33 m
  6. Machinery Workshops to north-west of Stables at Glynllifon Grade II 40 m
  7. Rubble-walled rear service drive to west of Glynllifon House Grade II 43 m
  8. Stable Courtyard at Glynllifon Grade II* 59 m
  9. Workshops Grade II 64 m
  10. Fountain Pool to east of Stable Courtyard Grade II 73 m