Summerhouse at Bryn Bras Castle is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 27 August 1999. Summerhouse.

Summerhouse at Bryn Bras Castle

WRENN ID
vast-chancel-mint
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
27 August 1999
Type
Summerhouse
Address
Summerhouse at Bryn Bras Castle, Bwlch, Llanrug
OS grid reference
SH 544 626
Coordinates
53.14072, -4.17805
Source
Cadw listing

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

Description

The summerhouse at Bryn Bras Castle is a structure with a half-hexagonal plan and a flat back that connects to the adjoining 'knot' garden wall. It is built from roughly coursed rubblestone and features a flat roof behind a parapet, along with a painted projecting string course. The front of the summerhouse has three large round-headed arches that contain French windows. There are no notable architectural features.

Local climate

Summerhouse at Bryn Bras Castle sits in one of the wettest parts of the UK, with an average of 1,380 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 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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
  • No related consent applications matched
  • 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. Pan figure and pool in walled 'knot' garden at Bryn Bras Castle Grade II 26 m
  2. Gladiator statue (north) at Bryn Bras Castle Grade II 48 m
  3. Gladiator statue (south) at Bryn Bras Castle Grade II 55 m
  4. Walled 'knot' garden at Bryn Bras Castle Grade II 69 m
  5. Bryn Bras Castle Grade II* 70 m
  6. Observatory at Bryn Bras Castle Grade II 112 m
  7. Boundary wall, gateways & turrets at Bryn Bras Castle Grade II 129 m
  8. Boundary wall, screen and gateway, SW side of Llanrug-Llanberis 'Mountain' Road at Bryn Bras Castle Grade II 135 m
  9. Pen Rallt Grade II 490 m
  10. Capel Tan-y-coed Grade II 657 m