23 Llys Dewi, Creigiau, Cardiff, CF15 9JY
About 23 Llys Dewi
23 Llys Dewi is a two-bedroom end-of-terrace house in Creigiau, Cardiff, Cardiff (CF15 9JY). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1983-1990 and council tax band C. The latest certificate (September 2019) shows a C (score 69), just inside the C band. When first surveyed in December 2008 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good, hot-water efficiency went from Average to Good and lighting went from Average to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88).
Held since May 2010 — that's 16 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. Across 1999–2010, sale prices on this property compounded at 9.8% per year. Today's modelled estimate of £214,000 is 49.7% above the 2010 sale price.
What this property has
Inside
- Bedrooms2
- Bathrooms1
Energy performance
EPC Rating
Certificate validity
Valid until 6 September 2029
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Wall insulation upgraded
Loft insulation upgraded to recommended levels
More low energy lighting installed
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Planning history
23 Llys Dewi 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
Sale price has at least doubled since 1999.
£214,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.8% per year over 11 years.
£143,000
Growth on file: 9.8% per year over 11 years.
Sales timeline
27 May 2010Most recent
£143,000
-3.4%over 1 year25 September 2008
£148,000
+28.8%over 4 years16 May 2004
£114,950
+121.1%over 4 years29 July 1999
£52,000
Median price across the last 5 sales in CF15 9JY: £215,000 (2025–2022).
Nearby sales in CF15 9JY
18 Llys Dewi, Creigiau, Cardiff, CF15 9JY
Sold May 2025
£215,00016 Llys Dewi, Creigiau, Cardiff, CF15 9JY
Sold Jan 2025
£235,00017 Llys Dewi, Creigiau, Cardiff, CF15 9JY
Sold Dec 2024
£187,50029 Llys Dewi, Creigiau, Cardiff, CF15 9JY
Sold May 2024
£258,00022 Llys Dewi, Creigiau, Cardiff, CF15 9JY
Sold Sept 2022
£195,000
Versus other Llys Dewi homes
On years held, 23 Llys Dewi stands well clear of the street.
Price per m²
£2,648
Street avg £2,963
Floor Area
54 m²
Street avg 59 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
2.3 t/year
Street avg 2.7 t/year
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The neighbourhood at a glance
Crime
85/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Llys Gwynno — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







