11 Colchester Avenue, Penylan, Cardiff, CF23 9BN
About 11 Colchester Avenue
11 Colchester Avenue is a semi-detached house in Penylan, Cardiff, Cardiff (CF23 9BN). It has a recorded floor area of 128 m² (around 1378 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (May 2011) shows an E (score 46), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 71), a 2-band jump. The latest certificate is from May 2011, so improvements made since then won't be reflected.
One planning record on file: an extension approved in 2018. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). 15 years since the last transfer (October 2011). Today's modelled estimate of £413,000 is 41.7% above the 2011 sale price.
Energy performance
11 Colchester Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 26 May 2021
EPC Rating
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Planning history
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
1 application on record at 11 Colchester Avenue, Penylan, Cardiff, CF23 9BN
- Feb 2018DemolitionFullOutcome in report
Extension: Single storey · Side of property
SINGLE STOREY SIDE EXTENSION AND ASSOCIATED ALTERATIONS. DEMOLITION AND REBUILD EXISTING SINGLE GARAGE AS HOME OFFICE / STORE
Extension- Documents
- 8 docs on file
- Reference
- 18/00059/DCH
Unlock 11 Colchester Avenue, Penylan, Cardiff, CF23 9BN's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 2 notable nearby
- The 8 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
11 Colchester Avenue valuation sits well clear of the typical sold price in this postcode.
£413,000
Modelled from EPC, postcode comparables.
£291,500
Recorded with HM Land Registry.
Sales timeline
27 October 2011Most recent
£291,500
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 epc rating, 11 Colchester Avenue runs well behind the street norm.
Price per m²
£2,277
Street avg £2,888
Floor Area
128 m²
Street avg 149 m²
Habitable Rooms
6 rooms
Street avg 6 rooms
CO₂ Emissions
8.2 t/year
Street avg 6.5 t/year
Similar properties nearby
1 Hugon Close
CF23 9BY
1 Barons Court Road, Penylan
CF23 9DF
1 Colchester Avenue, Penylan
CF23 9BN
1 Baber Close
CF23 9BX
1 Firstbrook Close
CF23 9ER
1 Doe Close, Penylan
CF23 9HJ
1 Earl S Court Road, Penylan
CF23 9DD
1 Kingwood Close, Penylan
CF23 9HE
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.







