| 18 Markwick Terrace Limited | East Sussex | 2006 |
| 18 Marlborough Buildings Ltd | Bath | 2026 |
| 18 Marmora Road RTM Company Ltd | London | 2014 |
| 18 Martyr Road Limited | Guildford | 1999 |
| 18 Milton Place Limited | Lenham | 2004 |
| 18 Montagu Square Limited | London | 2000 |
| 18 Montpelier Place Brighton Management Company Limited | Brighton | 2021 |
| 18 Montpellier Spa Road Limited | Petersfield | 2010 |
| 18 Montrell Road (Freehold) Company Limited | Streatham Hill | 2005 |
| 18 Montrose Avenue Management Company Limited | Bristol | 1993 |
| 18 Moreton Terrace Freehold Limited | London | 2008 |
| 18 Moreton Terrace Management Company Limited | London | 1987 |
| 18 Mornington Avenue (W14) Freehold Limited | London | 2021 |
| 18 Mostyn Road RTM Company Limited | Hampton | 2014 |
| 18 Mount Street Limited | | 1991 |
| 18 Mountfield Road (1999) Limited | London | 1999 |
| 18 Mountview Road Crouch END Limited | London | 1991 |
| 18 MR Freehold Management Limited | London | 2015 |
| 18 Murray Mews Limited | London | 2003 |
| 18 Napier Road Freehold Limited | Luton | 2002 |
| 18 Nelson Road Residents Company Limited | Portsmouth | 2006 |
| 18 New King Street (Bath) Management Company Limited | Bath | 1989 |
| 18 New Steine Brighton Limited | Newhaven | 2007 |
| 18 Nightingale Road Management Limited | Portsmouth | 2000 |
| 18 Norfolk Square Freehold Company Limited | Hove | 2011 |
| 18 Norham Gardens Limited | Oxford | 1989 |
| 18 North Birkbeck Limited | London | 2019 |
| 18 North END Management Co Ltd | London | 2025 |
| 18 North Road Freehold Limited | Epsom | 2013 |
| 18 North Side Limited | London | 1982 |
| 18 Oakhill Road Freehold Limited | London | 1998 |
| 18 Oppidans Road (2) Limited | London | 2011 |
| 18 Osmond Road Hove Limited | Hove | 2020 |
| 18 Overhill Road Limited | London | 2013 |
| 18 Parish Ghyll Road (Freehold) Limited | West Yorkshire | 2007 |
| 18 Park Lane Bath Management Limited | Croydon | 1988 |
| 18 Parkfield RD Management Company Limited | Napton | 2026 |
| 18 Parkside Road Management Company Ltd | Wokingham | 2024 |
| 18 Pathfield Road RTM Company Ltd | Bromley | 2019 |
| 18 Pevensey Road Freehold Company Limited | St Leonards On Sea | 2025 |
| 18 Pinfold Road Property Management Company Limited | London | 2012 |
| 18 Platts Lane Limited | London | 2007 |
| 18 Porchester Square Limited | Uxbridge | 2014 |
| 18 Portland Place (Brighton) Management Limited | Southsea | 2003 |
| 18 Portland Place Bath (Management) Limited | Avon | 1991 |
| 18 Portway Frome (Management) Limited | Trowbridge | 1989 |
| 18 Powis Road (Brighton) Limited | St. Leonards-On-Sea | 2015 |
| 18 PR Management Company Limited | London | 2020 |
| 18 Prentis Road Management Company Limited | Falmouth | 2021 |
| 18 Preston Road Management Company Limited | Weymouth | 2016 |
| 18 Princes Avenue Management Co. Limited | London | 1983 |
| 18 Priory Terrace London Limited | London | 2003 |
| 18 Prothero Road Limited | London | 2020 |
| 18 Pulteney Street (Flats) Limited | Croydon | 1981 |
| 18 QPG Residents Limited | Bournemouth | 2015 |
| 18 Quadrant Road RTM Company Limited | London | 2024 |
| 18 Queens Road Limited | Twickenham | 1997 |
| 18 Queensberry Place (Freehold) Limited | London | 2004 |
| 18 Radnor Park Road RTM Company Ltd | Folkestone | 2022 |
| 18 Ravenscar Road (Freehold) Company Limited | Surbiton | 2013 |
| 18 Ribblesdale Road RTM Company Limited | London | 2026 |
| 18 Ripon Road Management Company Limited | Harrogate | 1994 |
| 18 Rockmount Road Management Company Limited | | 1999 |
| 18 Rosary Gardens Limited | | 1979 |
| 18 Rosecroft Avenue Management Company Limited | London | 2002 |
| 18 Rowland Road Management Limited | Stevenage | 2013 |
| 18 Royal Crescent (Bath) Management Limited | Bristol | 1990 |
| 18 Salcott Road Limited | London | 2021 |
| 18 Salisbury Road Hove Limited | Hove | 2008 |
| 18 Sandgate Hill Freehold Limited | Broadstairs | 2019 |
| 18 Satanita Road RTM Company Ltd | Westcliff-On-Sea | 2020 |
| 18 School Road Management Limited | Hampton | 1999 |
| 18 Seaton Avenue Management Company Limited | Plymouth | 1989 |
| 18 Second Avenue Hove Limited | Brighton | 2001 |
| 18 Sheen Park Management Limited | London | 2004 |
| 18 Sherriff Road Management Company Ltd. | | 1988 |
| 18 Shrubbery Road Management Company Limited | Weston-Super-Mare | 2002 |
| 18 Silverdale Road Residents (Eastbourne) Limited | Eastbourne | 2001 |
| 18 Sinclair Gardens Limited | London | 2005 |
| 18 Somers Road Residents Association Limited | Dorking | 1998 |
| 18 Southleigh Road Clifton (Management) Limited | Bristol | 1981 |
| 18 Southside (Weston) Management Co Limited | Banwell | 1992 |
| 18 ST Augustines Road Management Ltd | London | 2012 |
| 18 ST Charles Square Freehold Limited | London | 2013 |
| 18 ST James Road Limited | Tunbridge Wells | 2012 |
| 18 ST Johns Road Ltd | London | 2018 |
| 18 ST. Aidan's Road Management Company Limited | London | 2008 |
| 18 ST. Mary's Street Chippenham (Management) Company Limited | Chippenham | 1993 |
| 18 ST. Quintin Avenue Limited | London | 1984 |
| 18 Stonor Road Limited | London | 1992 |
| 18 Swanmore Road Management Limited | Bournemouth | 2025 |
| 18 Talbot Road Management Company Limited | Great Sutton | 2001 |
| 18 the Avenue (Management) Company Limited | Bristol | 1982 |
| 18 the Mount Management Limited | London | 1996 |
| 18 Thorkhill Road Management Limited | Thames Ditton | 2018 |
| 18 to 20 Redcliffe Square Limited | London | 1998 |
| 18 Tournay Road Limited | Devizes | 1986 |
| 18 Tower Road Residents Association Limited | Epsom | 1986 |
| 18 Tregonwell Road Limited | Bournemouth | 2024 |
| 18 Tremadoc Road Ltd | Thames Ditton | 2022 |