| 23 Church Walk RTM Company Limited | Haywards Heath | 2013 |
| 23 Churchfield Road Management Limited | London | 1989 |
| 23 Clanricarde Gardens (Freehold) Limited | London | 2015 |
| 23 Claremount Road Management Company Limited | Merseyside | 2005 |
| 23 Clarence Road (Freehold) Management Company Limited | Croydon | 2011 |
| 23 Clarence Street Flat Management Company Limited | Liverpool | 2014 |
| 23 Clarendon Gardens Limited | Watford | 1999 |
| 23 Cobham Road Limited | London | 2013 |
| 23 College Cross Limited | London | 2004 |
| 23 College Road Brighton Limited | Brighton | 1989 |
| 23 Collingham Place Limited | Burgh Heath | 2012 |
| 23 Cornwall Gardens (SW7) RTM Company Limited | | 2004 |
| 23 Cotham Road Management Co. Limited | Bristol | 1982 |
| 23 Cotham Vale Management Company Limited | Bristol | 1984 |
| 23 Crawford Road Limited | London | 2014 |
| 23 Cromwell Road Hove Limited | East Sussex | 1985 |
| 23 Crouch Hall Road Limited | London | 2000 |
| 23 Cumberland Street Management Company Limited | Didcot | 2001 |
| 23 Dartmouth Park Hill (Freehold) Limited | London | 2009 |
| 23 Dartmouth Road NW2 Limited | | 2005 |
| 23 Daxzillion Limited | Harrow | 2018 |
| 23 Dean Park Road, Bournemouth, (Management) Limited | Bournemouth | 1978 |
| 23 Denbigh Road Limited | Solihull | 1989 |
| 23 Denning Road Management Limited | Harrow | 1988 |
| 23 Digby Crescent Management Company Limited | | 2003 |
| 23 Disraeli Road Ltd | Benfleet | 2025 |
| 23 Dollis AVE London N3 1DA RTM Company Ltd | Golders Green | 2018 |
| 23 Dollis Avenue (1998) Limited | Radlett | 1998 |
| 23 Dragon Avenue Management Company Limited | North Yorkshire | 2000 |
| 23 Duppas Hill Road Management Ltd | Croydon | 2019 |
| 23 Dupperhill Road RTM Company Limited | | 2007 |
| 23 Dyne Road Freehold Limited | Harlow | 2025 |
| 23 Eaton Place Freehold Limited | Andover | 2012 |
| 23 Egerton Road North Management Company Limited | Manchester | 2025 |
| 23 Elgin Crescent Freehold Company Limited | London | 2007 |
| 23 Elgin Park (Bristol) Management Company Limited | Norwich | 2010 |
| 23 Elgin Road Flat Management Ltd | Southampton | 2026 |
| 23 Ellerslie Road Management Company Limited | London | 2024 |
| 23 Esmond Road Limited | | 1987 |
| 23 Eylewood Road Management Company Limited | London | 2025 |
| 23 Fairbridge Road Limited | London | 2014 |
| 23 Ferndale Road Management Company Limited | London | 2016 |
| 23 Fernhead Road W9 3EU Limited | London | 2014 |
| 23 Filmer Road Management Company Limited | Chichester | 2019 |
| 23 Fitzhamon CYF | Cardiff | 2019 |
| 23 Fore Street Limited | Bath | 2020 |
| 23 Foulden Road Limited | Hertford | 2003 |
| 23 Fourth Avenue Limited | Tonbridge | 2008 |
| 23 Fremantle Square Management Company Limited | Avon | 1986 |
| 23 Gautrey Road Limited | London | 2018 |
| 23 Gladstone Place Limited | Brighton | 2020 |
| 23 Golders Green Crescent Management Company Limited | London | 2020 |
| 23 Goldhurst Terrace (Freehold) Limited | London | 2011 |
| 23 Goldstone Road Limited | East Sussex | 1999 |
| 23 Goodge Place Limited | London | 2004 |
| 23 Grafton Road Management Company Limited | Chesham | 1993 |
| 23 Grange Road RTM Company Limited | Thornton Heath | 2021 |
| 23 Great Pulteney ST. Limited | Croydon | 1977 |
| 23 Green Lane Management Company Limited | West Byfleet | 2008 |
| 23 Green Park Ltd | Bath | 2019 |
| 23 Greencroft Gardens Company Limited | London | 1996 |
| 23 Grove Park Freehold Limited | Croydon | 2012 |
| 23 Halesworth Road Management RTE Company Limited | Lewisham | 2019 |
| 23 Hampstead Hill Gardens Ltd | London | 2016 |
| 23 Handforth Road London Limited | London | 2015 |
| 23 Harlow Oval Limited | Harrogate | 2006 |
| 23 Hartington Villas Management Company Limited | Hove | 1989 |
| 23 Hastings Road Limited | Ealing | 2024 |
| 23 Henleaze Road Bristol Management Limited | Bristol | 1990 |
| 23 Henrietta Street (Bath) Management Company Limited | Warminster | 1986 |
| 23 High Street (Lewes) Limited | Lewes | 2025 |
| 23 High Street (Shoeburyness) Limited | Southend-On-Sea | 2012 |
| 23 High Street Management Company Limited | Farnham | 2006 |
| 23 Highbury Park Limited | Worcester Park | 2013 |
| 23 Highbury Place Limited | | 1986 |
| 23 Highgate West Hill (Freehold) Ltd | London | 2013 |
| 23 Hillfield Park N10 Limited | London | 2007 |
| 23 Holly Park Limited | London | 2015 |
| 23 Hollycroft Avenue (Freehold) Ltd | London | 2024 |
| 23 Homefield Road Management Co. Ltd | Warlingham | 2016 |
| 23 Homestead Road Limited | London | 2009 |
| 23 Hopton Road RTM Company Limited | London | 2019 |
| 23 HOW Wood Ltd | St. Albans | 2021 |
| 23 Jerningham Road RTM Company Limited | London | 2005 |
| 23 Josephine Avenue Freehold Company Limited | Sutton | 2014 |
| 23 Julian Road Management Company Ltd | Bristol | 2008 |
| 23 Kempsford Gardens Limited | London | 2009 |
| 23 Kestrel AVE Management Company Limited | London | 2026 |
| 23 Khama Road Management Company Limited | London | 2014 |
| 23 King Street RTM Company Limited | Broadstairs | 2007 |
| 23 Kingston Hill Residents Association Limited | Croydon | 1991 |
| 23 KS Frome Management Ltd | Frome | 2016 |
| 23 Lambrook Terrace Limited | Cheltenham | 2015 |
| 23 Lancaster Grove Residents' Association Limited | | 1978 |
| 23 Lancaster Park (Management) Limited | Surrey | 1995 |
| 23 Langside Avenue Management Limited | London | 2023 |
| 23 Lansdowne Street Limited | Hove | 2018 |
| 23 Lansdowne Way Limited | Victoria | 2003 |
| 23 Lathom Road RTM Company Limited | Southport | 2024 |
| 23 Leweston Place Limited | Hertford | 2014 |