| 20 Allen Street, Mountain Ash, CF45 4BD | Jun 2026 | £90,000 | Terraced | Freehold |
| 22 Allen Street, Mountain Ash, CF45 4BD | Apr 2025 | £120,000 | Terraced | Freehold |
| 24A Allen Street, Mountain Ash, CF45 4BD | Jul 2022 | £75,000 | Detached | Freehold |
| 17 Allen Street, Mountain Ash, CF45 4BD | Jul 2022 | £135,000 | Terraced | Freehold |
| 16 Allen Street, Mountain Ash, CF45 4BD | Apr 2022 | £106,000 | Terraced | Freehold |
| 13 Allen Street, Mountain Ash, CF45 4BD | May 2021 | £65,500 | Terraced | Freehold |
| 4 Allen Street, Mountain Ash, CF45 4BD | Apr 2020 | £58,000 | Terraced | Freehold |
| The Butchers Arms, 10 Allen Street, Mountain Ash, CF45 4BD | Apr 2020 | £100,000 | Other property | Freehold |
| 5 Allen Street, Mountain Ash, CF45 4BD | Aug 2019 | £44,000 | Terraced | Freehold |
| 12 Allen Street, Mountain Ash, CF45 4BD | May 2018 | £70,000 | Terraced | Freehold |
| 11 Allen Street, Mountain Ash, CF45 4BD | Mar 2018 | £45,500 | Terraced | Freehold |
| 14 Allen Street, Mountain Ash, CF45 4BD | Mar 2017 | £103,500 | Terraced | Freehold |
| 34 Allen Street, Mountain Ash, CF45 4BD | Aug 2014 | £74,000 | Terraced | Freehold |
| 21 Allen Street, Mountain Ash, CF45 4BD | Nov 2009 | £93,500 | Terraced | Freehold |
| 23 Allen Street, Mountain Ash, CF45 4BD | Apr 2003 | £70,000 | Detached | Freehold |
| 6 Allen Street, Mountain Ash, CF45 4BD | Dec 2002 | £29,000 | Terraced | Freehold |
| 27 Allen Street, Mountain Ash, CF45 4BD | Nov 2002 | £28,000 | Terraced | Freehold |
| 28 Allen Street, Mountain Ash, CF45 4BD | Oct 1999 | £34,736 | Terraced | Freehold |