Marlas House is a Grade II listed building in the Bridgend local planning authority area, Wales. First listed on 26 July 1963. House. 3 related planning applications.

Marlas House

WRENN ID
sheer-rampart-burdock
Grade
II
Local Planning Authority
Bridgend
Constituency
Aberafan Maesteg MP: Stephen Kinnock (Lab)
Country
Wales
Date first listed
26 July 1963
Type
House
Address
Marlas House, Cynffig, Cornelly, CF33 4PE
OS grid reference
SS 818 822
Coordinates
51.52664, -3.70396
Source
Cadw listing

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

Description

Marlas House is a house, likely dating to the 17th century, with later alterations and additions, constructed from stone rubble with slate roofs. The main east-facing entrance elevation has a rough cast finish, with a forward-facing gable at each end. Each gable face contains a blocked oval opening. There are three windows in the centre, each with 12 panes arranged in sashes, set within plain architraves. A central panelled door sits beneath a flat hood supported by two wooden columns.

A long south range extends from the main block. The eastern portion comprises three window bays with a large, added gabled porch. A 12-pane sash window is on the ground floor and margin-glazed sashes are in the raised roof. The range continues westward at its original, lower roof pitch, featuring irregular glazing. This includes a blocked cartway and five square windows under the eaves, all blocked except for the easternmost window, which has been incorporated into the dwelling. Part of an external gable stack and a stone window with a sunk-chamfered frame are also present.

At the west end, the roof returns to the north range, which features a corbelled stack projecting from the gable end. A modern glazed porch connects the main house to a shorter north wing, positioned at an angle following the road to Kenfig. This wing, probably of 18th century origin, now serves as the kitchen and has been modernised. Twin stone flues rise to the western stacks.

During a previous inspection, access was not possible. Records from RCAHM Wales indicate an early 17th century boarded door to the kitchen, and roof trusses with both lapped and morticed collars.

Local climate

Marlas House sits in one of the wettest parts of the UK, with an average of 1,220 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 76% 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 2015
  • 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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