| 23 Homes Ltd | Cardiff | 2019 |
| 23 Housing Solutions Limited | Stockport | 2024 |
| 23 HR Limited | Moon Lane | 2019 |
| 23 Humbolt Road Ltd | London | 2019 |
| 23 Huntington Street Freehold Ltd | London | 2016 |
| 23 Icknield Road Limited | Stanmore | 2022 |
| 23 IGS Management Company Limited | Bristol | 2017 |
| 23 Incorporated Ltd | Malton | 2023 |
| 23 Innovations Properties Limited | Barking | 2025 |
| 23 Inverness Limited | London | 2019 |
| 23 Investment Ltd | Wakefield | 2022 |
| 23 Jersey Limited | London | 2021 |
| 23 John Street Management Company Limited | Bridport | 1992 |
| 23 KHR Freehold Limited | London | 2015 |
| 23 Kings Road Management Company Limited | | 2003 |
| 23 Kohat Road Limited | London | 2023 |
| 23 Langdon Ltd | | 1997 |
| 23 Langland Gardens Limited | London | 1995 |
| 23 Lansdowne Road Aldershot Hampshire Management Company Limited | Farnborough | 1988 |
| 23 Lascotts Road N22 Limited | London | 2003 |
| 23 Leinster Terrace Limited | London | 2025 |
| 23 Lightburne Avenue Management Company Ltd | Blackpool | 2019 |
| 23 London Investments Limited | London | 2023 |
| 23 London Road Limited | Harrow | 2023 |
| 23 Maldon Road Wallington Limited | Wallington | 2004 |
| 23 Malvern Road Ltd | Wembley | 2025 |
| 23 Marloes Road Freehold Limited | London | 2013 |
| 23 Micheldever Limited | London | 2017 |
| 23 Middle Street Limited | London | 2022 |
| 23 Millennium Limited | Cheltenham | 2022 |
| 23 Milton RD Ltd | Bournemouth | 2026 |
| 23 Milton Road Ltd | Bournemouth | 2026 |
| 23 Minety Limited | Slough | 2022 |
| 23 Montague Road Management Ltd | London | 2024 |
| 23 Nicholson Road Freehold Ltd | Croydon | 2017 |
| 23 Northfield Road Ltd | London | 2024 |
| 23 Oldfield Road Limited | Watford | 2021 |
| 23 Overstone Road Management Limited | Oxford | 2012 |
| 23 Palmerston Street Limited | Axminster | 2012 |
| 23 Park Street Bath (Management) Limited | Bath | 1984 |
| 23 Percy Road Management Co. Limited | London | 2002 |
| 23 Phoenix Court Limited | Croydon | 2023 |
| 23 Porters Wood Limited | St Albans | 2026 |
| 23 Property Investments Ltd | Northampton | 2025 |
| 23 Property Ltd | Leicester | 2023 |
| 23 QG Place (the Penthouse) Limited | St Albans | 2024 |
| 23 QNS Highlands Ltd | Aberdeen | 2017 |
| 23 Quarry Hill Road Limited | Tonbridge | 2023 |
| 23 Queens Avenue Limited | London | 1996 |
| 23 Rathbone Street Ltd | London | 2024 |
| 23 Real Estate Ltd | Leek | 2023 |
| 23 Reliant Ltd | Edgware | 2021 |
| 23 Rochester Road Limited | Chingford | 2014 |
| 23 Ronalds Road Management Company Limited | London | 2006 |
| 23 Ropery Street Management Limited | London | 2003 |
| 23 Rudall Crescent Ltd | London | 2017 |
| 23 Rutland Park Freehold Company Limited | London | 2015 |
| 23 Severn Road SPV Ltd | Warwick | 2021 |
| 23 Sillwood Road Freeholders Limited | West Sussex | 2004 |
| 23 Simonds Road Freehold Limited | London | 2022 |
| 23 Sinclair Gardens Limited | London | 2013 |
| 23 SLR RTM Company Limited | Ringwood | 2013 |
| 23 South Villas Limited | London | 1999 |
| 23 Southey Road Limited | London | 2019 |
| 23 ST Helens Park Road Limited | Hastings | 2013 |
| 23 ST James Ltd | London | 2025 |
| 23 Stanhope Gardens Freehold Limited | Edgware | 2025 |
| 23 Stanley Road Management Company Limited | London | 2012 |
| 23 Stansfield Road (Freehold) Limited | Betchworth | 2026 |
| 23 Star Limited | Bridlington | 2013 |
| 23 Stockfield Road Management Company Limited | Saffron Walden | 2013 |
| 23 Strathblaine Road (Freehold) Limited | London | 2004 |
| 23 Sunderland Terrace Limited | London | 2006 |
| 23 the Barons Management Limited | Middlesex | 1999 |
| 23 Third Avenue RTM Company Limited | Hove | 2010 |
| 23 Thornfield Grove Ltd | Manchester | 2020 |
| 23 Toft Mansion Limited | London | 2023 |
| 23 Tooting BEC Gardens Residents Company Limited | London | 1998 |
| 23 Upper Addison Gardens (Residents) Limited | Holland Park | 1999 |
| 23 Walnut Ltd | London | 2020 |
| 23 Warwick Avenue Limited | Bedford | 2000 |
| 23 Wellington Avenue Management Company Limited | Bristol | 2007 |
| 23 West Mall Management Limited | Bristol | 1982 |
| 23 Westby Road Residents RTM Company Limited | Wimborne | 2004 |
| 23 WG Limited | London | 2020 |
| 23 Wish Road Ltd | Brighton | 2021 |
| 23 Wood Vale (Freehold) Limited | London | 2017 |
| 23 Woodstock Road Freehold Ltd | Croydon | 2022 |
| 23 Woolwich Road Ltd | Gravesend | 2023 |
| 23-23 Limited | Worcester | 2002 |
| 23-25 Heavitree Road Management Company Ltd | Torquay | 2019 |
| 23-26 Great James Street (Freehold) Limited | Caterham | 2011 |
| 23-26 Lady Mary Road Norwich Limited | Diss | 2014 |
| 23-35 Kingfisher Drive (Greenhithe) RTM Company Limited | Gravesend | 2016 |
| 23.6 Rooms Ltd | London | 2022 |
| 23/23A ST Andrews Road Limited | Luton | 2016 |
| 23/24 Devonshire Place Brighton Management Company Limited | Brighton | 1996 |
| 23/24 Heathfield Square Limited | Kingston Upon Thames | 2004 |
| 230 Burlington Ltd | London | 2025 |
| 230 Electrical Engineers & Contractors Ltd | Porthcawl | 2008 |