| 18 Clarendon Gardens Limited | Households | 1984 |
| 18 Clarendon Rise (Management) Ltd | Households | 2022 |
| 18 Comeragh Road Limited | Households | 2004 |
| 18 Commerce Limited | Wholesale & retail | 2024 |
| 18 Copeland Road Limited | Real estate | 2012 |
| 18 Cornwall Gardens SW7 Management Company Limited | Households | 1993 |
| 18 Court Yard Management Ltd. | Real estate | 2015 |
| 18 Cranwich Ltd | Real estate | 2025 |
| 18 Cranwich Road Freehold Ltd | Real estate | 2015 |
| 18 Creffield Road London W5 Management Limited | Households | 2014 |
| 18 Crossfield Road (Belsize Park) Limited | Real estate | 2004 |
| 18 Cumberland Park Management Limited | Households | 2010 |
| 18 Degrees Below Ltd | Professional & scientific | 2017 |
| 18 Degrees Holdings Ltd | Financial services | 2021 |
| 18 Delaford Street Limited | Households | 2012 |
| 18 Denning Road Management Company Limited | Households | 2026 |
| 18 Dingwall Gardens Limited | Households | 2024 |
| 18 Donaldson Road Management Company Limited | Real estate | 1994 |
| 18 Donovan Avenue Limited | Households | 2019 |
| 18 Downside Crescent Limited | Households | 2018 |
| 18 Drewstead Road Management Ltd | Professional & scientific | 2016 |
| 18 Dulwich Road SE24 Limited | Households | 2007 |
| 18 Duncan Terrace RTM Company Limited | Households | 2005 |
| 18 Dundalk Road Management Company Limited | Households | 2013 |
| 18 Eagle Road Freehold Ltd. | Households | 2019 |
| 18 East Heath Road Management Company Limited | Households | 1986 |
| 18 Eaton Place (Brighton) RTM Company Limited | Households | 2007 |
| 18 Edbrooke Road Limited | Households | 2025 |
| 18 Egerton Gardens Freehold Limited | Households | 2012 |
| 18 Elmcroft Road (Management) Limited | Real estate | 1998 |
| 18 Elsham Road Management Company Limited | Households | 1979 |
| 18 Endymion Road Management Company Limited | Real estate | 1996 |
| 18 Ennismore Avenue Management Limited | Households | 2013 |
| 18 Ennismore Limited | Extraterritorial | 2010 |
| 18 Estates Ltd | Real estate | 2024 |
| 18 Evering Road Limited | Households | 2017 |
| 18 Ferndale Limited | Real estate | 2013 |
| 18 Fernthorpe Road RTM Company Limited | Households | 2008 |
| 18 Fitzjohns Avenue Hampstead Limited | Households | 1959 |
| 18 Flashlight LDN Limited | Real estate | 2019 |
| 18 Follett Street Freehold Limited | Households | 2007 |
| 18 Frithville Gardens Hammersmith Limited | Hospitality | 2002 |
| 18 Frobisher Ltd | Real estate | 2019 |
| 18 Gambole Road Management Company Limited | Real estate | 2002 |
| 18 Gauden Road Management Company Limited | Households | 1990 |
| 18 Glazbury Road Management Company Limited | Households | 1997 |
| 18 Gledhow Gardens Limited | Households | 2002 |
| 18 Glenloch Road Limited | Households | 2021 |
| 18 GR Limited | Extraterritorial | 2014 |
| 18 Granville Park Flat Management Co Limited | Households | 1991 |
| 18 Greenwood Road Ltd | Extraterritorial | 2014 |
| 18 Gresham Limited | Real estate | 2024 |
| 18 Greville Road (Management) Limited | Real estate | 1981 |
| 18 Grove Park Limited | Households | 2015 |
| 18 Halford Road Limited | Households | 2010 |
| 18 Handen Road Freeholders Limited | Households | 2014 |
| 18 Hanley Road Freehold Ltd | Real estate | 2013 |
| 18 Harbledown Road Freehold Limited | Households | 2020 |
| 18 Hertford Street Management Limited | Households | 1976 |
| 18 Highbury Grange Limited | Households | 1991 |
| 18 Highgate High Street Limited | Real estate | 2018 |
| 18 Hillcrest Road Limited | Households | 2020 |
| 18 Hillfield Road (Freehold) Ltd | Households | 2014 |
| 18 Hilltop Road Management Limited | Households | 2004 |
| 18 Hogarth Road Ltd | Construction | 2023 |
| 18 Hollycroft Avenue N.W.3. Limited | Households | 1980 |
| 18 Hollycroft Avenue(Freehold) Ltd | Households | 2010 |
| 18 Hyde Park Gardens Freehold Limited | Households | 2010 |
| 18 John Ruskin Street RTM Company Limited | Households | 2011 |
| 18 Kemplay Road Management Company Limited | Households | 1997 |
| 18 Ladbroke Crescent Limited | Households | 2018 |
| 18 Ladbroke Gardens, London, W.11. Management Limited | Households | 1983 |
| 18 Lambolle Place Management Limited | Households | 1996 |
| 18 Lancaster Road RTM Company Ltd | Households | 2019 |
| 18 Lanhill Road RTM Company Limited | Households | 2010 |
| 18 Lansdowne Grove Limited | Households | 2009 |
| 18 Leamington Road Villas Limited | Real estate | 2004 |
| 18 Lebanon Gardens Ltd | Real estate | 2019 |
| 18 Lechmere Freehold Ltd | Real estate | 2023 |
| 18 Leigh Street Limited | Real estate | 2014 |
| 18 Lifestyle Group Ltd | Other services | 2025 |
| 18 Lime Grove Property Management Limited | Households | 1983 |
| 18 Lindfield Gardens Limited | Households | 2001 |
| 18 Louvaine Road Limited | Households | 2005 |
| 18 Lyndhurst Gardens Management Co. Limited | Households | 1979 |
| 18 Maberley Road Management Company Limited | Professional & scientific | 2000 |
| 18 Maclise Road Residents Limited | Households | 1993 |
| 18 Macroom Road Management Limited | Households | 2002 |
| 18 Manstone Road RTM Company Limited | Households | 2008 |
| 18 Marmora Road RTM Company Ltd | Households | 2014 |
| 18 Marylebone Mews Limited | Real estate | 1995 |
| 18 Miranda Road Management Company Limited | Real estate | 2013 |
| 18 Montagu Square Limited | Households | 2000 |
| 18 Moreton Terrace Freehold Limited | Households | 2008 |
| 18 Moreton Terrace Management Company Limited | Households | 1987 |
| 18 Mornington Avenue (W14) Freehold Limited | Households | 2021 |
| 18 Mountfield Road (1999) Limited | Households | 1999 |
| 18 Mountview Road Crouch END Limited | Households | 1991 |
| 18 MR Freehold Management Limited | Households | 2015 |
| 18 Murray Mews Limited | Households | 2003 |