12 Dorchester Avenue, Penylan, Cardiff, CF23 9BQ
About 12 Dorchester Avenue
12 Dorchester Avenue is a semi-detached house in Penylan, Cardiff, Cardiff (CF23 9BQ). It has a recorded floor area of 192 m² (around 2067 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (September 2022) shows an E (score 52), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump.
Sold November 2022 for £750,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
12 Dorchester Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
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Planning history
12 Dorchester Avenue 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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£774,000
Modelled from EPC, postcode comparables.
£750,000
Recorded with HM Land Registry.
Sales timeline
22 November 2022Most recent
£750,000
Median price across the last 4 sales in CF23 9BQ: £487,500 (2024–2001).
Versus other Dorchester Avenue homes
Habitable Rooms for 12 Dorchester Avenue lags the street by a wide margin.
Price per m²
£3,906
Street avg £3,164
Floor Area
192 m²
Street avg 189 m²
Habitable Rooms
5 rooms
Street avg 8 rooms
CO₂ Emissions
9.9 t/year
Street avg 9.1 t/year
Similar properties nearby
1 Clos Gwrgi, Penylan
CF23 9FQ
1 Earl S Court Road, Penylan
CF23 9DD
1 Barons Court Road, Penylan
CF23 9DF
1 Colchester Avenue, Penylan
CF23 9BN
1 Hugon Close
CF23 9BY
1 Baber Close
CF23 9BX
1 Firstbrook Close
CF23 9ER
1 Doe Close, Penylan
CF23 9HJ
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
Colchester Avenue Top — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







