| 15 Brockhurst Road Limited | Chesterfield | 2021 |
| 15 Bronsart Road (Fulham) Freehold Limited | Marlow | 2018 |
| 15 Brunswick Road Property Management Limited | Kingston Upon Thames | 2005 |
| 15 Brussels Road Limited | | 2005 |
| 15 Buckingham Road (Brighton) Limited | Hove | 2009 |
| 15 Buckland Hill (Maidstone) Management Company Limited | Maidstone | 2008 |
| 15 Bullen Street Limited | | 2000 |
| 15 Burdett Avenue Freehold Limited | Westcliff-On-Sea | 2023 |
| 15 Cadogan Terrace Management Company Limited | London | 2005 |
| 15 Caledonia Place Limited | Bristol | 1985 |
| 15 Cambridge Road Management Company Limited | Birmingham | 2024 |
| 15 Canning Crescent (Freeholders) Limited | Hatfield | 2000 |
| 15 Canterbury Road Management Company Limited | Harlow | 2016 |
| 15 Castellain Road Limited | | 2003 |
| 15 Castle Road Management Co Limited | Whitstable | 2025 |
| 15 Castletown Road (Management) Company Limited | London | 2004 |
| 15 Catharine Place (Bath) Management Company Limited | Bath | 2006 |
| 15 Cavendish Road Management Limited | London | 2020 |
| 15 Chandos Road Freehold Limited | London | 2021 |
| 15 Charlton Place Ltd | Bath | 2025 |
| 15 Chaucer Road (Bedford) Management Company Limited | Sudbury | 1985 |
| 15 Cheniston Gardens Limited | London | 1999 |
| 15 Chertsey Road Redland Bristol Limited | Bristol | 1981 |
| 15 Chesham Place (Brighton) Limited | | 2004 |
| 15 Cheyne Place Limited | Watford | 1985 |
| 15 Chilworth Street Freehold Limited | Hoddesdon | 2013 |
| 15 Churchill Road Boscombe Limited | London | 2007 |
| 15 Clapton Square Freehold Limited | London | 2018 |
| 15 Clarence Square Limited | East Sussex | 1990 |
| 15 Clarendon Gardens Limited | | 1982 |
| 15 Clarendon Road Redland Management Limited | Bristol | 1995 |
| 15 Claverton Street (Freehold) Limited | London | 2016 |
| 15 Clermont Terrace (Brighton) Freeholders Limited | Brighton | 2019 |
| 15 Clifton Road Freeholders Limited | Bognor Regis | 2019 |
| 15 Clifton Street (BN1) Ltd | Shoreham-By-Sea | 2015 |
| 15 Clouds Hill Road (Management) Limited | Bristol | 1979 |
| 15 Coleherne Road (Management) Limited | London | 1987 |
| 15 Collingham Road Limited | London | 1991 |
| 15 Compton Avenue Brighton Limited | Hove | 2009 |
| 15 Comyn Road Management Limited | London | 2011 |
| 15 Consort Road Management Limited | London | 1999 |
| 15 Conway Street (Freehold) Limited | Bath | 2015 |
| 15 Coolhurst Road Freehold Limited | London | 2013 |
| 15 Cosway Street Freehold Limited | London | 1997 |
| 15 Courtfield Gardens Limited | Daventry | 1997 |
| 15 Cranbury Place RTM Company Limited | Southampton | 2026 |
| 15 Craven Terrace Ltd | Paddington | 2025 |
| 15 Craven Terrace RTM Company Limited | Ticehurst | 2025 |
| 15 Credenhill Street Freehold Limited | London | 2026 |
| 15 Crescent Road (N8) Limited | London | 1997 |
| 15 Cresswell Gardens Limited | Brighton | 1994 |
| 15 Cricklade Avenue RTM Company Limited | London | 2016 |
| 15 Cromwell Place Management Company Limited | Highgate | 1999 |
| 15 Cromwell Road Hove Freehold Company Limited | Hove | 2021 |
| 15 Cromwell Road RTM Company Limited | London | 2018 |
| 15 Crouch Hall Road Freehold Company Limited | London | 2024 |
| 15 Dalberg Road Management Company Limited | | 2002 |
| 15 Dean Lane Management Limited | Clevedon | 2012 |
| 15 Deronda Road Freehold Limited | London | 2013 |
| 15 Dock Street Management Limited | Hoddesdon | 2006 |
| 15 Dragon Parade ( Management ) Limited | Leeds | 2026 |
| 15 DRY Hill Road Management Company Ltd | Tonbridge | 2025 |
| 15 Dunbar Road Limited | Bournemouth | 1991 |
| 15 Eastern Esplanade Freehold Ltd | London | 2023 |
| 15 Egerton Road (Freehold) Limited | Bexhill On Sea | 2001 |
| 15 Elderton Road RTM Company Limited | Westcliff-On-Sea | 2023 |
| 15 Ellington Street, London, N7 Limited | Stockport | 2008 |
| 15 Elsham Road Limited | London | 2006 |
| 15 Elsworthy Terrace Limited | | 1994 |
| 15 ES Limited | London | 2015 |
| 15 Eslington Terrace Limited | Rowlands Gill | 2001 |
| 15 Ethelbert Road Ltd | Margate | 2021 |
| 15 Fairhazel Gardens Management Company Limited | Kingston Upon Thames | 2002 |
| 15 Fawley Road Limited | | 1988 |
| 15 Filey Road Management Company Ltd | Scarborough | 2024 |
| 15 Firth Gardens Freehold Limited | London | 2008 |
| 15 Ford Park Road Management Company Limited | Plymouth | 2016 |
| 15 Fourth Avenue (Hove) Freeholders Ltd | Hove | 2019 |
| 15 Gateley Road Management Limited | | 1986 |
| 15 GER Management Limited | Cardiff | 2018 |
| 15 Gillespie Road Limited | London | 2011 |
| 15 Girdlers Road Limited | London | 2000 |
| 15 Gledhow Gardens Freehold Limited | London | 2010 |
| 15 Gleneldon Limited | Coxheath | 2018 |
| 15 Glenmore Road (Management) Limited | Minehead | 1996 |
| 15 Glenton Road Limited | Thaxted | 1998 |
| 15 Gloucester Drive Management Company Limited | London | 2006 |
| 15 Goldsmid Road Limited | Hove | 2016 |
| 15 Gordon Avenue Limited | Uxbridge | 2009 |
| 15 Gordon Place Limited | London | 2017 |
| 15 Grand Avenue Hove Limited | Brighton | 1990 |
| 15 Grange Road Limited | East Sussex | 2000 |
| 15 Great Percy Street Limited | London | 2005 |
| 15 Greyhound Lane RTM Company Limited | Thornton Heath | 2020 |
| 15 Grosvenor Place (Bath) Limited | London | 1989 |
| 15 Grosvenor Road Residents Company Limited | Sutton | 2003 |
| 15 Grove Road (Management) Company Limited | Bristol | 1983 |
| 15 Grove Street Limited | Bath | 2024 |
| 15 GT Limited | London | 1994 |
| 15 Gunter Grove Limited | London | 2008 |