Glasfryn & Tamariu is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 30 September 1999. House. 3 related planning applications.

Glasfryn & Tamariu

WRENN ID
strange-postern-juniper
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
30 September 1999
Type
House
Address
Glasfryn & Tamariu, Llandwrog, Caernarfon, LL54 5TF
OS grid reference
SH 455 569
Coordinates
53.08704, -4.30795
Source
Cadw listing

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

Description

This is a two-storey and attic double-depth plan house, likely dating from the 1850s, as indicated by the shield on the south gable. The main range faces east. The building is constructed of regularly coursed rubble stone, dressed with ashlar window quoins and lintels on the front elevation, with irregularly coursed rubble elsewhere. It has slate roofs.

The front has a 1:2:1 bay arrangement, with the central two bays projecting under a gabled break featuring coped verges, kneelers, and a small octagonal chimney at the apex. The first floor windows are paired 8-pane windows, with the lower sections opening as side-hung casements. The ground floor windows have more pronounced mullions and transoms, with the lower lights divided into 4 panes and the upper into 2. A Tudor-arched doorway to the left bay of the central gable leads to a 4-panel door and a fanlight mirroring the arch's shape. An attic window is a 2-light plastic window with 9 panes, presumably designed to resemble a historic window. A tall rendered stack runs along the ridge, extending down the front roof slope to the right of the gable. The gable ends are largely blank except for small attic ventilation slits and the shield dated 1850 on the south gable end, which also has an integral chimney stack.

The rear range is plainer, featuring a mix of windows similar to those on the front, some of which have been replaced with plastic but remain within the original openings. An integral stack at the south end of the west wall has a tall stepped shaft. Various single-storey, flat-roofed additions have been made.

Inside, a Victorian staircase is present in the Tamariu section, and it is of Jacobean style with pointed newels.

Local climate

Glasfryn & Tamariu 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 1 transaction since 2001
  • Related listed building consents — 3 applications
  • 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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