31 Bryn Celyn, Cardiff, CF23 7EE
About 31 Bryn Celyn
31 Bryn Celyn is a four-bedroom mid-terrace house in Cardiff (CF23 7EE). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (July 2024) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2014. Between certificates, roof efficiency went from Very Poor to Good, hot-water efficiency went from Very Poor to Poor and lighting went from Average to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 88), a 2-band jump. Main heating runs on electricity.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2006–2013, sale prices on this property compounded at 7.2% per year. Today's modelled estimate of £202,000 sits 112.6% above the 2013 sale of £95,000. 13 years since the last transfer (June 2013).
What this property has
Inside
- Bedrooms4
- Bathrooms1
Outside
- DrivewayYes
Building
- RefurbishedYes
Energy performance
31 Bryn Celyn sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Certificate validity
Valid until 25 July 2034
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Roof insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
31 Bryn Celyn 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
31 Bryn Celyn's estimated value is more than triple its earliest registered sale price (2006).
£202,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.2% per year over 7 years.
£95,000
Growth on file: 7.2% per year over 7 years.
Sales timeline
13 June 2013Most recent
£95,000
+61.7%over 6 years11 July 2006
£58,750
Median price across the last 5 sales in CF23 7EE: £155,000 (2026–2015).
Versus other Bryn Celyn homes
31 Bryn Celyn is notably below the street on co₂ emissions.
Price per m²
£990
Street avg £1,322
Floor Area
96 m²
Street avg 92 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.5 t/year
Street avg 2.4 t/year
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The neighbourhood at a glance
Crime
169/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Pentwyn Leisure Centre — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







