| Flat 8, Mayfair Court Observer Drive, Watford, WD18 7GA | Nov 2025 | £290,000 | Flat / maisonette | Leasehold |
| Flat 23, Mayfair Court Observer Drive, Watford, WD18 7GA | May 2025 | £305,000 | Flat / maisonette | Leasehold |
| Flat 24, Mayfair Court Observer Drive, Watford, WD18 7GA | Jan 2025 | £340,000 | Flat / maisonette | Leasehold |
| Flat 10, Mayfair Court Observer Drive, Watford, WD18 7GA | Aug 2024 | £340,000 | Flat / maisonette | Leasehold |
| Flat 11, Mayfair Court Observer Drive, Watford, WD18 7GA | Nov 2023 | £322,000 | Flat / maisonette | Leasehold |
| Flat 3, Mayfair Court Observer Drive, Watford, WD18 7GA | Nov 2022 | £335,000 | Flat / maisonette | Leasehold |
| Flat 29, Mayfair Court Observer Drive, Watford, WD18 7GA | Oct 2021 | £325,000 | Flat / maisonette | Leasehold |
| Flat 28, Mayfair Court Observer Drive, Watford, WD18 7GA | Mar 2021 | £320,000 | Flat / maisonette | Leasehold |
| Flat 18, Mayfair Court Observer Drive, Watford, WD18 7GA | Apr 2020 | £332,000 | Flat / maisonette | Leasehold |
| Flat 13, Mayfair Court Observer Drive, Watford, WD18 7GA | Dec 2018 | £337,000 | Flat / maisonette | Leasehold |
| Flat 19, Mayfair Court Observer Drive, Watford, WD18 7GA | Sep 2015 | £300,000 | Flat / maisonette | Leasehold |
| Flat 4, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2015 | £286,000 | Flat / maisonette | Leasehold |
| Flat 5, Mayfair Court Observer Drive, Watford, WD18 7GA | Nov 2013 | £240,000 | Flat / maisonette | Leasehold |
| Flat 9, Mayfair Court Observer Drive, Watford, WD18 7GA | Nov 2013 | £246,000 | Flat / maisonette | Leasehold |
| Flat 16, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2013 | £235,000 | Flat / maisonette | Leasehold |
| Flat 17, Mayfair Court Observer Drive, Watford, WD18 7GA | Mar 2012 | £235,000 | Flat / maisonette | Leasehold |
| Flat 7, Mayfair Court Observer Drive, Watford, WD18 7GA | Dec 2011 | £235,000 | Flat / maisonette | Leasehold |
| Flat 26, Mayfair Court Observer Drive, Watford, WD18 7GA | May 2007 | £247,000 | Flat / maisonette | Leasehold |
| Flat 14, Mayfair Court Observer Drive, Watford, WD18 7GA | May 2006 | £205,000 | Flat / maisonette | Leasehold |
| Flat 15, Mayfair Court Observer Drive, Watford, WD18 7GA | May 2006 | £220,000 | Flat / maisonette | Leasehold |
| Flat 30, Mayfair Court Observer Drive, Watford, WD18 7GA | Mar 2006 | £229,500 | Flat / maisonette | Leasehold |
| Flat 27, Mayfair Court Observer Drive, Watford, WD18 7GA | Mar 2006 | £247,500 | Flat / maisonette | Leasehold |
| Flat 12, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £235,000 | Flat / maisonette | Leasehold |
| Flat 22, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £242,500 | Flat / maisonette | Leasehold |
| Flat 25, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £216,000 | Flat / maisonette | Leasehold |
| Flat 21, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £229,500 | Flat / maisonette | Leasehold |
| Flat 20, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £209,995 | Flat / maisonette | Leasehold |
| Flat 6, Mayfair Court Observer Drive, Watford, WD18 7GA | Feb 2006 | £240,000 | Flat / maisonette | Leasehold |
| Flat 1, Mayfair Court Observer Drive, Watford, WD18 7GA | Jan 2006 | £240,000 | Flat / maisonette | Leasehold |
| Flat 2, Mayfair Court Observer Drive, Watford, WD18 7GA | Dec 2005 | £229,000 | Flat / maisonette | Leasehold |