| 18 New North Street Management Limited | Real estate | 2000 |
| 18 North 77 West Ltd | Wholesale & retail | 2020 |
| 18 North Birkbeck Limited | Households | 2019 |
| 18 North END Management Co Ltd | Households | 2025 |
| 18 North Side Limited | Households | 1982 |
| 18 November Ltd | Professional & scientific | 2023 |
| 18 Oakhill Road Freehold Limited | Households | 1998 |
| 18 Odessa Road Limited | Real estate | 2003 |
| 18 Oppidans Road (2) Limited | Households | 2011 |
| 18 Overhill Road Limited | Households | 2013 |
| 18 Oxford Road (Management Company) Limited | Hospitality | 2002 |
| 18 Pembridge Square Limited | Financial services | 2017 |
| 18 Petherton Road Limited | Real estate | 2005 |
| 18 Pinfold Road Property Management Company Limited | Households | 2012 |
| 18 Platts Lane Limited | Households | 2007 |
| 18 PR Management Company Limited | Households | 2020 |
| 18 Princes Avenue Management Co. Limited | Households | 1983 |
| 18 Priory Terrace London Limited | Households | 2003 |
| 18 Properties Limited | Real estate | 2025 |
| 18 Prothero Road Limited | Households | 2020 |
| 18 Quadrant Road RTM Company Limited | Households | 2024 |
| 18 Queensberry Place (Freehold) Limited | Households | 2004 |
| 18 Records Limited | Information & communication | 2019 |
| 18 Rees Street, London N1 Limited | Real estate | 1996 |
| 18 Ribblesdale Road RTM Company Limited | Households | 2026 |
| 18 Rodwell Property Management Ltd | Real estate | 2024 |
| 18 Rosecroft Avenue Management Company Limited | Households | 2002 |
| 18 Roseleigh Avenue (N5) Management Limited | Extraterritorial | 2004 |
| 18 Rutland Gate Ltd | Real estate | 2026 |
| 18 Salcott Road Limited | Households | 2021 |
| 18 Salvin Road Limited | Extraterritorial | 2000 |
| 18 Seaforth Ltd | Real estate | 2024 |
| 18 Seconds Ltd | Arts & recreation | 2024 |
| 18 Seconds Management Ltd | Professional & scientific | 2025 |
| 18 Seymour Mews Limited | Extraterritorial | 2018 |
| 18 Sheen Park Management Limited | Households | 2004 |
| 18 Shorrolds Road Management Limited | Hospitality | 1991 |
| 18 Sinclair Gardens Limited | Households | 2005 |
| 18 Somerset LLP | | 2022 |
| 18 Somerset Road Freehold Limited | Real estate | 2026 |
| 18 Somerset Road Limited | Real estate | 2024 |
| 18 Sparsholt Road Limited | Hospitality | 2008 |
| 18 Sports Talent Ltd | Arts & recreation | 2023 |
| 18 Springfield Ltd | Real estate | 2022 |
| 18 ST Augustines Road Management Ltd | Households | 2012 |
| 18 ST Charles Square Freehold Limited | Households | 2013 |
| 18 ST George's Square (Freehold) Limited | Professional & scientific | 2016 |
| 18 ST Johns Road Ltd | Households | 2018 |
| 18 ST. Aidan's Road Management Company Limited | Households | 2008 |
| 18 ST. Charles Square RTM Company Limited | Real estate | 2008 |
| 18 ST. Paul's Avenue Limited | Professional & scientific | 2003 |
| 18 ST. Quintin Avenue Limited | Households | 1984 |
| 18 Steeles Road Management Company Limited | Real estate | 1996 |
| 18 Stonor Road Limited | Households | 1992 |
| 18 Stowe Road Limited | Real estate | 2015 |
| 18 Tetherdown Freehold Limited | Real estate | 2014 |
| 18 the Mount Management Limited | Households | 1996 |
| 18 to 20 Redcliffe Square Limited | Households | 1998 |
| 18 TPR Ltd | Real estate | 2023 |
| 18 Tregothnan Road Management Company Limited | Real estate | 2012 |
| 18 Tudor Road Management Co. Limited | Real estate | 1991 |
| 18 UGE Freehold Limited | Households | 2021 |
| 18 Ventures Ltd | Financial services | 2020 |
| 18 Vereker Road Limited | Households | 1997 |
| 18 Waller Road Management Limited | Real estate | 2011 |
| 18 Week Support Limited | Health & social care | 2019 |
| 18 Wellfield Road Limited | Households | 2020 |
| 18 Weltje Road Limited | Households | 2010 |
| 18 Wetherby Gardens Limited | Households | 2007 |
| 18 Wetherby Place Limited | Households | 1993 |
| 18 Wilson Road Camberwell Limited | Professional & scientific | 2005 |
| 18 Wray Crescent Freehold Company Limited | Real estate | 2022 |
| 18 WTR Freehold Limited | Households | 2014 |
| 18, Anerley Hill Management Company Limited | Households | 1986 |
| 18-19 North Villas Ltd | Households | 1996 |
| 18-20 Ardleigh Road RTM Company Limited | Households | 2025 |
| 18-20 Chepstow Crescent Limited | Households | 2000 |
| 18-20 Craven Hill Gardens Limited | Construction | 2011 |
| 18-20 Randolph Crescent Limited | Households | 1983 |
| 18-20 Sloane Gardens RTM Company Limited | Households | 2019 |
| 18-20 Thornton Hill Management Limited | Households | 2013 |
| 18-20 Warrington Crescent Limited | Households | 1982 |
| 18-20 Westbourne Terrace RTM Company Ltd | Households | 2023 |
| 18-21 Dorset Court (Freehold) Company Limited | Households | 1997 |
| 18-21 Wilmington Square Management Limited | Households | 1982 |
| 18-33 Lyndhurst Court (Churchfields) RTM Co Ltd | Households | 2014 |
| 18-36 the Glade Limited | Administrative & support | 2005 |
| 18-53 Elderfield Place Limited | Households | 2003 |
| 18/18A Collingham Gardens Management Company Limited(The) | Households | 1987 |
| 18/19 Ladbroke Square Limited | Real estate | 1969 |
| 18/20 Archer Road Limited | Real estate | 2007 |
| 18/20 Cranley Gardens Residents Association Limited | Households | 1996 |
| 18/20 Eardley Crescent Management Company Limited | Households | 1999 |
| 18/20 King Henry's Road Limited | Households | 1979 |
| 18/20 Little Ealing Lane (Freehold) Limited | Real estate | 2010 |
| 18/20 Oakley Road Freehold Limited | Real estate | 2019 |
| 18/20 Warwick Square Residents Limited | Households | 1991 |
| 180 Bletchley Ltd | Real estate | 2024 |
| 180 Boundaries Road Limited | Households | 2019 |
| 180 Brooke Owners Limited | Real estate | 2017 |