1 Roundwood Close, Penylan, Cardiff, CF23 9HH
About 1 Roundwood Close
1 Roundwood Close is a semi-detached house in Penylan, Cardiff, Cardiff (CF23 9HH). It has a recorded floor area of 79 m² (around 850 sq ft), construction records dating it to 1967-1975 and council tax band E. The latest certificate (July 2020) shows a C (score 70). The recommended improvements would push it to B (score 84).
Across 2001–2020, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £337,000 is 18.2% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£335/sq ft) was about 46.2% above the typical sold price in the postcode. Most recent transfer: December 2020 at £285,000.
Energy performance
EPC Rating
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Planning history
1 Roundwood 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
Sale price has at least doubled since 2001.
£337,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 19 years.
£285,000
Growth on file: 5.8% per year over 19 years.
Sales timeline
15 December 2020Most recent
£285,000
+195.3%over 19 years9 August 2001
£96,500
Median price across the last 5 sales in CF23 9HH: £290,000 (2025–2020).
Nearby sales in CF23 9HH
20 Roundwood Close, Penylan, Cardiff, CF23 9HH
Sold Jan 2025
£275,0006 Roundwood Close, Penylan, Cardiff, CF23 9HH
Sold Dec 2022
£320,0003 Roundwood Close, Penylan, Cardiff, CF23 9HH
Sold Mar 2022
£290,00019 Roundwood Close, Penylan, Cardiff, CF23 9HH
Sold Jun 2021
£295,00024 Roundwood Close, Penylan, Cardiff, CF23 9HH
Sold Apr 2019
£303,000
Versus other Roundwood Close homes
1 Roundwood Close outperforms the street on price per m² by a wide margin.
Price per m²
£3,608
Street avg £2,571
Floor Area
79 m²
Street avg 92 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
2.7 t/year
Street avg 3.5 t/year
Similar properties nearby
1 Doe Close, Penylan
CF23 9HJ
1 Kingwood Close, Penylan
CF23 9HE
1 Firstbrook Close
CF23 9ER
1 Baber Close
CF23 9BX
1 Ffordd Nowell, Penylan
CF23 9FA
1 Hugon Close
CF23 9BY
1 Grafton Close, Penylan
CF23 9JA
1 Howardian Close, Penylan
CF23 9AG
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
Llanedeyrn Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







