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Get startedThis 118 square metre property in Cwmtaf, Merthyr Tydfil, Merthyr Tydfil carries an energy performance rating of D, in line with typical UK homes. It is heated by oil-fired central heating and is currently listed as owner-occupied. The property last sold for £18,000 in 2019, down from £230,000 in an earlier transaction.
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EPC rating and efficiency details
This certificate is over 10 years old and is no longer valid.Expired 16 Sept 2025
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency improved
Window efficiency improved
More low energy lighting installed
Hot water efficiency decreased
Are we missing something? Tell us about home improvements to help adjust your valuation.
Transactions and market trends
Estimated value
£382,000
How our AI predicts property prices · Accurate to within 10%
Automated estimate only. For an accurate valuation, consult a surveyor or estate agent.
Source: HM Land Registry
11 Llwyn Onn Houses Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
Dec 2019
14 Llwyn Onn Houses Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
Nov 2018
Homeleigh Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
May 2017
Maes Y Coed Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
May 2015
16 Llwyn Onn Houses Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
Apr 2015
15 Llwyn Onn Houses Llwynon Cwmtaf Merthyr Tydfil CF48 2HT
Apr 2010
98.6
Jan 26
UK HPI from HM Land Registry. Baseline: Jan 2015 = 100.
See how this property stacks up against others nearby
Comparing to 6 other houses on this street
Property value per square metre of floor space
Lowest among similar properties
Time since last sale — indicates ownership stability
Held longer than only 20% of similar properties
Government energy efficiency score (1–100)
More efficient than 67% of similar properties
Total internal floor space
Larger than 67% of similar properties
Annual carbon output from heating, hot water & lighting
Lower emissions than all similar properties
Living spaces like bedrooms & living rooms
More rooms than 67% of similar properties
Comparisons are based on the most recent EPC data for each property in this postcode. Only similar property types (houses) are compared.
New sales, price changes, and market updates in this area
This property is located in Cwmtaf, Merthyr Tydfil, within the CF 48 postcode area, and sits close to the Royal Glamorgan Hospital, a key healthcare facility in the region.
Cwmtaf, Merthyr Tydfil lies in the CF 48 postal district of South Wales. The area is associated with the Royal Glamorgan Hospital, a district general hospital that is part of the NHS Wales public healthcare system and managed by the Cwm Taf Morgannwg University Health Board. The hospital is situated in Ynysmaerdy, Talbot Green, within Rhondda Cynon Taf, providing a central medical service for residents of Cwmtaf and surrounding communities. The locality’s name appears in official records and is linked to the hospital’s presence, indicating a community that benefits from nearby medical facilities. Residents of Cwmtaf are therefore likely to find convenient access to healthcare services and may consider the proximity to a major hospital a practical advantage when evaluating the area for property investment or residence.
6 months of data for Merthyr Tydfil
Public Order
Nov 2025On or near Yr Hen Laethdy
Violence & Sexual
Nov 2025On or near Wyndham Street
Violence & Sexual
Nov 2025On or near Church Street
Violence & Sexual
Nov 2025On or near Church Street
Other Crime
Nov 2025On or near Yr Hen Laethdy
Violence & Sexual
Nov 2025On or near South View
Data from Police UK • Updated monthly
Schools and transport links nearby
Llwyn-on Village
Bus Stop106m
1 min
Forest Mountain Centre
Bus Stop1.9km
23 mins
Forest Visitor Centre
Bus Stop1.9km
23 mins
Garwnant Forest Visitor Centre
Bus Stop1.9km
23 mins
School data from Dept. for Education • Transport data from NaPTAN
4 points of interest nearby
Map data from OpenStreetMap • Transport data from NaPTAN • School data from Dept. for Education • Scenic data from Beautifulplaces.ai
Common questions about this property