| 51 Padgate Lane Propco Ltd | Luton | 2025 |
| 51 Pelham Road Management Limited | Wimbledon | 2003 |
| 51 Plus Ltd | London | 2017 |
| 51 Property UK Ltd | Cardiff | 2019 |
| 51 Radnor Walk Limited | | 1989 |
| 51 Rentals Ltd | Manchester | 2026 |
| 51 RG Nominee 1 Limited | London | 2019 |
| 51 RG Nominee 2 Limited | London | 2019 |
| 51 Rosebery Gardens Limited | London | 2002 |
| 51 Rowley Hill Street Limited | Worcester | 2024 |
| 51 Sedgley Road, Dudley Ltd | Dudley | 2024 |
| 51 SJM Ltd | Leicester | 2021 |
| 51 South Road Management Company Limited | Christchurch | 2003 |
| 51 Springfield Road Freehold Ltd | Bristol | 2009 |
| 51 ST Dunstans House Limited | Borehamwood | 2014 |
| 51 ST. John's Road Management Limited | Bristol | 1988 |
| 51 Stanley Road Limited | Bridgend | 2023 |
| 51 Stirling Road Freehold Limited | Bournemouth | 2019 |
| 51 Strathblaine Road Ltd | London | 2015 |
| 51 Upper Grosvenor Road Management Company Limited | Tunbridge Wells | 2003 |
| 51 Upperton Gardens (Eastbourne) Limited | Eastbourne | 2014 |
| 51 Victoria Crescent Management Limited | London | 2008 |
| 51 Victoria Road Ltd | Watford | 2020 |
| 51 Walliscote Road (WSM) Management Company Limited | Weston-Super-Mare | 1988 |
| 51 Wellington Road Limited | Middlesex | 1999 |
| 51 Wells House Road Limited | London | 2002 |
| 51 Westgate Street Limited | Gloucester | 2024 |
| 51 Winchester Street (Management) Limited | London | 1976 |
| 51 Woodland Way (Mitcham) Management Company Limited | Epsom | 2017 |
| 51 Woodlands Road (Freehold) Limited | Bromley | 2024 |
| 51 York Road (Farnborough) Management Company Limited | London | 2005 |
| 51, Folkestone Road Freehold Limited | Dover | 2015 |
| 51-53 High Street (Wheatley) Management Company Limited | Kidlington | 2005 |
| 51-60 Prince of Wales Mansions Management Company Limited | London | 1987 |
| 51/53 Dollar Street Cirencester Management Company Limited | Crudwell | 2003 |
| 51/53 Grays Inn Road Limited | London | 2002 |
| 51/53 Handel Way Freehold Ltd | Edgware | 2023 |
| 51/55 Marlborough Hill Freehold Limited | London | 2007 |
| 511 Capital & Co Ltd | Wembley | 2024 |
| 511 Properties Ltd | Birmingham | 2026 |
| 512 Properties Ltd | Nelson | 2023 |
| 512 Wilmslow Road Limited | Manchester | 1996 |
| 51214 Property Ltd | Manchester | 2026 |
| 513 Lordship Lane Limited | London | 2018 |
| 514 Consolidated Limited | Slough | 2023 |
| 5149 Water Pump Ltd | London | 2025 |
| 516 Romney House Limited | Northwood | 2006 |
| 517 Homes Ltd | Watford | 2023 |
| 517 Investment Limited | Edinburgh | 2025 |
| 518 Dagenham Green Ltd | London | 2025 |
| 518 Fulham Palace Road Limited | Wilmslow | 1996 |
| 518 Ltd | Croydon | 2021 |
| 519 Investments Ltd | Hayes | 2024 |
| 519 Investors Limited | Hayes | 2025 |
| 519 Property Limited | Sheffield | 2012 |
| 51A Lampton Road Ltd | London | 2019 |
| 51B Lampton Road Ltd | London | 2019 |
| 51D Ermine Road Ltd | London | 2023 |
| 51HOMES Ltd | London | 2022 |
| 51HOUSE Limited | Oxford | 2022 |
| 51KR Ltd | London | 2025 |
| 51KR Old Trafford Ltd | London | 2024 |
| 51NGH Ltd | West Bromwich | 2018 |
| 51RODNEYSTREET Limited | Liverpool | 2014 |
| 51TRINITYROAD Ltd | Hoylake | 2025 |
| 51ZERO Estates Ltd | London | 2025 |
| 52 Alderney Street Limited | | 1995 |
| 52 and 52A Oaklands Grove (Management) Limited | London | 2001 |
| 52 AR Limited | London | 2025 |
| 52 Arlingford Road Freehold Limited | London | 2014 |
| 52 Balcombe Street (Freehold) Limited | London | 2026 |
| 52 Bedford ROW Tenant Limited | London | 2019 |
| 52 Belsize Park Limited | London | 1987 |
| 52 Bickerton Road Freehold Company Limited | London | 2024 |
| 52 Brecknock Road (Freehold) Ltd | London | 2013 |
| 52 Brunswick Ltd | Brighton | 2024 |
| 52 Brunswick Place Limited | Brighton | 2024 |
| 52 Catherine Street Management (Frome) Limited | New Malden | 2003 |
| 52 Cavendish Place (Eastbourne) Limited | Eastbourne | 2000 |
| 52 Church Road Residents' Association Limited | Teddington | 1989 |
| 52 Degrees North (Cheltenham) Ltd | Barrow-In-Furness | 2011 |
| 52 Delancy Street Management Limited | Middlesex | 2002 |
| 52 Deptford Broadway Limited | Herts | 2022 |
| 52 Devonshire Ltd | London | 2018 |
| 52 Eglinton Hill Flat Management Company Limited | Bromley | 2010 |
| 52 Elsham Road Limited | London | 2026 |
| 52 Fordingley Road Freehold Limited | London | 2015 |
| 52 Glengarry Road Limited | Wokingham | 2005 |
| 52 Goldhurst Terrace Limited | London | 1996 |
| 52 Grafton Road Worthing (RTM) Ltd | Pulborough | 2010 |
| 52 Guilford Avenue Freehold Management Ltd | Guildford | 2007 |
| 52 Hampden Road Limited | London | 2005 |
| 52 Hampton Park Bristol Management Company Limited(The) | Bristol | 1982 |
| 52 Harwood Road Limited | Leeds | 2004 |
| 52 High Street Limited | Orpington | 2016 |
| 52 Linden Gardens Limited | London | 1997 |
| 52 Mostyn Avenue Limited | Llandudno Junction | 2023 |
| 52 Moxon Street Limited | London | 2013 |
| 52 Nevil Road Limited | Bristol | 2006 |
| 52 North Kent Ltd | London | 2026 |