Glyntaff Round House is a Grade II listed building in the Rhondda Cynon Taf local planning authority area, Wales. First listed on 25 May 1962. Towers with wings. 2 related planning applications.

Glyntaff Round House

WRENN ID
tangled-tallow-holly
Grade
II
Local Planning Authority
Rhondda Cynon Taf
Constituency
Pontypridd MP: Alex Davies-Jones (Lab)
Country
Wales
Date first listed
25 May 1962
Type
Towers with wings
Address
Glyntaff Round House, 31 Graig-Yr-Helfa Road, Pontypridd, Rhondda Cynon Taff, CF37 4AR
OS grid reference
ST 084 896
Coordinates
51.59842, -3.32377
Source
Cadw listing

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

Description

The Glyntaff Round House is a building comprising a pair of three-stage round towers that flank wrought iron gates, with two-storey attached wings. The walls are rendered and painted white. The towers and the right-hand wing have slate roofs, while the left-hand wing has replacement tile roofs, all featuring wide boarded eaves. The towers have eaves stacks on their outer sides, and each wing has two ridge stacks. The lower and middle stages of the towers each contain three narrow windows with triangular heads, while the upper stage has two windows. The rear wings incorporate single-fronted and then double-fronted cottages. Lower projections have been added to both ends and at the rear of the structure. The interiors have been modernised. The building belongs to a group of four similar buildings.

Local climate

Glyntaff Round House sits in a wetter-than-average part of the UK, with an average of 1,120 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 85% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 53% of listed buildings. Of these, 14 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
  • Related listed building consents — 2 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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Nearby listed buildings

  1. 32 Graig-yr-Helfa Road Grade II 10 m
  2. 30 Graig-yr-Helfa Road Grade II 16 m
  3. 29 Graig-yr-Helfa Road Grade II 25 m
  4. Church of St Mary Grade II 230 m
  5. Memorial to Richard Crawshay in churchyard of Church of St Mary Grade II 244 m
  6. Memorial to John Thomas (Ieuan Ddu) in churchyard of Church of St Mary Grade II 258 m
  7. Gates and gate piers to Church of St Mary Grade II 279 m
  8. 48 Pentrebach Road Grade II 315 m
  9. Glamorgan Centre for Art & Design Grade II 360 m
  10. Machine Bridge (also known as Pont y Doctor) Grade II* 385 m