21, Celyn Avenue, Cardiff occupies a 277 m² plot as recorded by HM Land Registry.

Of the 18 other houses in this postcode, 17 have recorded plot sizes, and this one ranks as the 15th largest.

21, Celyn Avenue, Cardiff has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 01 Oct 2014.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

21, Celyn Avenue, Cardiff last changed hands on 31st October 2012, selling for £231,500. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 29.2% since October 2012.

Land Registry records and our Estate Agent network show 147 sales of comparable properties within 650 metres of 21, Celyn Avenue, Cardiff since 2017.

Most recently, 10, Padarn Close, Cardiff, CF23 6ER, a freehold house, sold at £480,000 on the 12th December 2025.

Read more about house prices in CF23.

• Sold Dec 2025£480,000 | 3 Bed House10, Padarn Close, Cardiff, CF23 6ER10, Padarn Close, Cardiff, CF23 6ER
• Sold Aug 2025£400,100 | 3 Bed House59, Mountbatten Close, Cardiff, CF23 5QG59, Mountbatten Close, Cardiff, CF23 5QG
• Sold Jul 2025£399,950 | 3 Bed House61, Ogwen Drive, Cardiff, CF23 6LJ61, Ogwen Drive, Cardiff, CF23 6LJ
• Sold Jul 2025£400,000 | 3 Bed House32, Crystal Avenue, Cardiff, CF23 5QL32, Crystal Avenue, Cardiff, CF23 5QL
• Sold May 2025£400,000 | 3 Bed House88, Heath Park Avenue, Cardiff, CF14 3RJ88, Heath Park Avenue, Cardiff, CF14 3RJ
• Sold Mar 2025£425,000 | 3 Bed House19, Carnegie Drive, Cardiff, CF23 6DH19, Carnegie Drive, Cardiff, CF23 6DH
• Sold Feb 2025£385,000 | 3 Bed House41, Gwynant Crescent, Cardiff, CF23 6LT41, Gwynant Crescent, Cardiff, CF23 6LT
• Sold Dec 2024£380,000 | 3 Bed House16, Carnegie Drive, Cardiff, CF23 6DH16, Carnegie Drive, Cardiff, CF23 6DH
• Sold Dec 2024£425,000 | 3 Bed House89, Ogwen Drive, Cardiff, CF23 6LJ89, Ogwen Drive, Cardiff, CF23 6LJ
• Sold Oct 2024£392,700 | 3 Bed House14, Crystal Avenue, Cardiff, CF23 5QJ14, Crystal Avenue, Cardiff, CF23 5QJ
• Sold Sep 2024£395,000 | 3 Bed House101, Ogwen Drive, Cardiff, CF23 6LJ101, Ogwen Drive, Cardiff, CF23 6LJ
• Sold May 2024£460,000 | 3 Bed House40, Mountbatten Close, Cardiff, CF23 5QH40, Mountbatten Close, Cardiff, CF23 5QH
• Sold Oct 2023£355,000 | 3 Bed House7, Celyn Avenue, Cardiff, CF23 6EH7, Celyn Avenue, Cardiff, CF23 6EH
• Sold Jun 2023£420,000 | 3 Bed House8, Heath Halt Road, Cardiff, CF23 5QF8, Heath Halt Road, Cardiff, CF23 5QF
• Sold Apr 2023£390,000 | 3 Bed House55, Celyn Avenue, Cardiff, CF23 6EJ55, Celyn Avenue, Cardiff, CF23 6EJ
• Sold Nov 2022£390,000 | 3 Bed House27, Mountbatten Close, Cardiff, CF23 5QG27, Mountbatten Close, Cardiff, CF23 5QG
• Sold Jan 2021£378,000 | 3 Bed House15, Celyn Avenue, Cardiff, CF23 6EH15, Celyn Avenue, Cardiff, CF23 6EH
• Sold Jul 2020£338,000 | 3 Bed House45, Ogwen Drive, Cardiff, CF23 6LJ45, Ogwen Drive, Cardiff, CF23 6LJ
• Sold Jan 2019£385,000 | 3 Bed House12, Padarn Close, Cardiff, CF23 6ER12, Padarn Close, Cardiff, CF23 6ER
• Sold Aug 2017£525,000 | 3 Bed House5, Padarn Close, Cardiff, CF23 6ER5, Padarn Close, Cardiff, CF23 6ER

Our analysis of the public data ranks 21, Celyn Avenue, Cardiff as the 49th largest and the 40th most expensive of the 148 addresses on Celyn Avenue, Cardiff, CF23.

Against the CF23 postcode district average, it is £60k more expensive than the typical property.

• Heath High Level

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  500 m away
• Heath Low Level

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  600 m away
• Ty Glas

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  1.7 km away

Environment Agency data suggests this area has a Very Low risk of flooding.