17 Brynheulog, Pentwyn, Cardiff, CF23 7JA
About 17 Brynheulog
17 Brynheulog is a detached house in Pentwyn, Cardiff, Cardiff (CF23 7JA). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1991-1995 and council tax band B. At 59 m² this is the smallest unit on EPC record across the building (59–100 m²). The building's EPC ratings span D to B across 42 units on file. The latest certificate (November 2025) shows a C (score 74). The rating has held steady at C across 3 certificates since June 2014. Between certificates, roof efficiency went from Good to Very Good and lighting went from Poor to Good; while window efficiency dropped from Average to Poor.
At 59 m² it sits well below the postcode median (88 m² across 41 EPCs), making it one of the more compact homes locally.
Everything you need to know about 17 Brynheulog
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Energy performance
17 Brynheulog's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
More low energy lighting installed
Wall insulation upgraded
Loft insulation upgraded to recommended levels
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Planning history
17 Brynheulog has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
17 Brynheulog has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£137,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in CF23 7JA: £155,000 (2024–2018).
Nearby sales in CF23 7JA
10 Brynheulog, Pentwyn, Cardiff, CF23 7JA
Sold May 2024
£155,00016 Brynheulog, Pentwyn, Cardiff, CF23 7JA
Sold Jul 2022
£125,00013 Brynheulog, Pentwyn, Cardiff, CF23 7JA
Sold Jul 2021
£165,00023 Brynheulog, Pentwyn, Cardiff, CF23 7JA
Sold Oct 2018
£156,00015 Brynheulog, Pentwyn, Cardiff, CF23 7JA
Sold Aug 2018
£90,950
Versus other Brynheulog homes
On co₂ emissions, 17 Brynheulog stands well clear of the street.
EPC Rating
74 (C)
Street avg 70 (C)
Floor Area
59 m²
Street avg 60 m²
CO₂ Emissions
1.3 t/year
Street avg 2.1 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Everything you need to know about 17 Brynheulog
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
St Bernardettes — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.