Bronynys is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 14 May 1998. A Late Regency House.

Bronynys

WRENN ID
worn-footing-solstice
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
14 May 1998
Type
House
Address
Bronynys, Ynysfor, Porthmadog, Llanfrothen
OS grid reference
SH 599 420
Coordinates
52.95769, -4.08598
Source
Cadw listing

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

Description

Bronynys is a late-Regency house featuring three bays and two stories, with a service wing at the rear that forms an L shape. The building is constructed of rubble with a rendered front and has a shallow-pitched slate roof, characterized by deep verges and oversailing eaves. It has plain end chimneys with weathercoursing and cornice bands. The symmetrical front of the house includes a central entrance at the stepped-up ground floor, which features a four-panel door with the upper two panels being glazed, along with a plain rectangular overlight above. A modern open porch with iron-work supports and a glazed roof is positioned in front of the entrance. The ground and first floors have 16-pane, slightly-recessed, unhorned sash windows, each with projecting slate cills. At the rear, a lower service wing extends to the left, partly enclosing a service court, and includes later 19th-century and modern windows, as well as a part-glazed rear door. The interior was not accessible for inspection during the survey.

Local climate

Bronynys sits in one of the wettest parts of the UK, with an average of 1,500 mm of rain a year. This makes it wetter than 98% 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 32 freeze-thaw cycles a year, fewer than 58% of listed buildings. Of these, 16 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 2 transactions since 2004
  • 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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