21 Grafton Close, Penylan, Cardiff, CF23 9JA
About 21 Grafton Close
21 Grafton Close is a three-bedroom semi-detached house in Penylan, Cardiff, Cardiff (CF23 9JA). It has a recorded floor area of 79 m² (around 850 sq ft), construction records dating it to 1950-1966 and council tax band E. The latest certificate (August 2019) shows a D (score 68), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 82), a 2-band jump.
Most recent transfer was August 2025 at £250,000 — fresh data. Across 2020–2025, sale prices on this property compounded at 2.6% per year. Today's modelled estimate of £314,000 is 25.6% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£294/sq ft) was about 71.8% above the typical sold price in the postcode. At 79 m² it's 15.1% smaller than the typical home in the postcode (93 m² median across 11 EPCs).
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Open-plan layoutYes
- Dining roomYes
- StudyYes
Outside
- Private gardenYes
- GarageYes
Building
- Central heatingYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
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Planning history
21 Grafton Close has no planning applications on record.
But the area is active
2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21 Grafton Close valuation sits well clear of the typical sold price in this postcode.
£314,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.6% per year over 6 years.
£250,000
Growth on file: 2.6% per year over 6 years.
Sales timeline
19 August 2025Most recent
£250,000
+15.2%over 5 years15 January 2020
£217,000
Median price across the last 5 sales in CF23 9JA: £270,000 (2024–2017).
Nearby sales in CF23 9JA
3 Grafton Close, Penylan, Cardiff, CF23 9JA
Sold Mar 2024
£200,0007 Grafton Close, Penylan, Cardiff, CF23 9JA
Sold Mar 2023
£420,00013 Grafton Close, Penylan, Cardiff, CF23 9JA
Sold Feb 2023
£270,00017 Grafton Close, Penylan, Cardiff, CF23 9JA
Sold Oct 2017
£130,00033 Grafton Close, Penylan, Cardiff, CF23 9JA
Sold Sept 2012
£160,000
Versus other Grafton Close homes
21 Grafton Close is notably below the street on years held.
Price per m²
£3,165
Street avg £2,887
Floor Area
79 m²
Street avg 91 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.7 t/year
Street avg 3.9 t/year
Similar properties nearby
1 Kingwood Close, Penylan
CF23 9HE
1 Firstbrook Close
CF23 9ER
1 Hugon Close
CF23 9BY
1 Bryn Y Nant, Llanedeyrn
CF23 9NZ
1 Earl S Court Road, Penylan
CF23 9DD
1 Ffordd Nowell, Penylan
CF23 9FA
1 Doe Close, Penylan
CF23 9HJ
1 Grafton Close, Penylan
CF23 9JA
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
Grafton Close — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







