31 Colchester Avenue, Penylan, Cardiff, CF23 9BN
About 31 Colchester Avenue
31 Colchester Avenue is a mid-terrace house in Penylan, Cardiff, Cardiff (CF23 9BN). It has a recorded floor area of 154 m² (around 1658 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (October 2016) shows a D (score 55), a step below the typical UK home. The rating has held steady at D across 2 certificates since June 2014. Between certificates, window efficiency went from Average to Good and lighting went from Average to Very Good; while roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 72).
Held since November 2001 — that's 25 years off the open market, well above the local norm. Today's modelled estimate of £379,000 sits 2005.6% above the 2001 sale of £18,000. On a £-per-square-foot basis, the last sale (£11/sq ft) was about 95.1% below the postcode norm. At 154 m² it's 18.5% larger than the typical home in the postcode (130 m² median across 13 EPCs).
Energy performance
31 Colchester Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Certificate validity
Valid until 3 October 2026
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
More low energy lighting installed
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Planning history
31 Colchester 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
Latest sale on 31 Colchester Avenue was the lowest on Land Registry record across the postcode.
£379,000
Modelled from EPC, postcode comparables.
£18,000
Recorded with HM Land Registry.
Sales timeline
23 November 2001Most recent
£18,000
Median price across the last 5 sales in CF23 9BN: £430,000 (2025–2018).
Nearby sales in CF23 9BN
7 Colchester Avenue, Penylan, Cardiff, CF23 9BN
Sold Mar 2025
£615,00017 Colchester Avenue, Penylan, Cardiff, CF23 9BN
Sold Jun 2024
£378,0005 Colchester Avenue, Penylan, Cardiff, CF23 9BN
Sold Feb 2022
£570,00021 Colchester Avenue, Penylan, Cardiff, CF23 9BN
Sold Oct 2020
£430,00035 Colchester Avenue, Penylan, Cardiff, CF23 9BN
Sold May 2015
£376,000
Versus other Colchester Avenue homes
On price per m², 31 Colchester Avenue runs well behind the street norm.
Price per m²
£117
Street avg £3,158
Floor Area
154 m²
Street avg 146 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
7.5 t/year
Street avg 6.5 t/year
Similar properties nearby
1 Baber Close
CF23 9BX
1 Firstbrook Close
CF23 9ER
1 Hugon Close
CF23 9BY
1 Doe Close, Penylan
CF23 9HJ
1 Kingwood Close, Penylan
CF23 9HE
1 Earl S Court Road, Penylan
CF23 9DD
1 Barons Court Road, Penylan
CF23 9DF
1 Colchester Avenue, Penylan
CF23 9BN
The neighbourhood at a glance
Crime
169/mo
Falling 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.







