| 20 Clonbrock Road Limited | Households | 1996 |
| 20 Coleherne Road Residents Company Limited | Households | 1992 |
| 20 Collingham Gardens Limited | Real estate | 2005 |
| 20 Coolhurst Road Limited | Professional & scientific | 2007 |
| 20 Court Road Limited | Households | 2002 |
| 20 Craven Avenue Management Limited | Households | 2020 |
| 20 Crediton Hill Limited | Households | 1981 |
| 20 Crewdson Road Limited | Households | 2017 |
| 20 Croftdown Road (Freehold) Limited | Real estate | 2011 |
| 20 Darwin Street Management Ltd. | Professional & scientific | 2001 |
| 20 Day Lofts Ltd | Construction | 2021 |
| 20 Denbigh Street Residents Association Limited | Households | 1995 |
| 20 Derby Estates Ltd | Real estate | 2025 |
| 20 Devonshire Drive Limited | Real estate | 1982 |
| 20 Devonshire Road RTM Company Limited | Real estate | 2010 |
| 20 Doro Ltd | Wholesale & retail | 2022 |
| 20 Dorset Square RTM Company Limited | Real estate | 2013 |
| 20 Douglas Road Management Limited | Professional & scientific | 1992 |
| 20 DS Lease Limited | Financial services | 2025 |
| 20 Durham Terrace Limited | Households | 2008 |
| 20 East Dulwich Road (London) RTM Company Limited | Real estate | 2020 |
| 20 Eastdown Park Ltd | Households | 1997 |
| 20 ELM Park Road (Freehold) Limited | Households | 2022 |
| 20 Elmbourne Road Limited | Households | 1991 |
| 20 Ennismore Gardens Residents Association Limited | Households | 1990 |
| 20 Farleigh Road Limited | Households | 2006 |
| 20 Fenchurch Street (GP) Limited | Administrative & support | 2010 |
| 20 Fenchurch Street Limited Partnership | | 2010 |
| 20 Fenchurch Street Nominee NO. 2 Limited | Administrative & support | 2010 |
| 20 Fenchurch Street Nominee NO.1 Limited | Administrative & support | 2010 |
| 20 Fenwick Road Limited | Households | 2020 |
| 20 Fortess Road Ltd | Households | 2025 |
| 20 Four 7 Films Limited | Information & communication | 2012 |
| 20 Garden Walk RTM Company Ltd | Households | 2024 |
| 20 Geraldine Road Management Limited | Households | 2016 |
| 20 Gillingham Street Management Limited | Professional & scientific | 2009 |
| 20 Gledhow Gardens RTM Company Limited | Households | 2023 |
| 20 Glenelg Road Management Limited | Professional & scientific | 2013 |
| 20 Glenrosa Street (Freehold) Limited | Households | 2015 |
| 20 Goodwin Road Freehold & Management Limited | Households | 2021 |
| 20 Gordon Place London Limited | Real estate | 2015 |
| 20 Gracechurch (General Partner) Limited | Financial services | 2006 |
| 20 Gracechurch Limited Partnership | | 2006 |
| 20 Grange Park Limited | Households | 2018 |
| 20 Grange Road Freehold Limited | Households | 2022 |
| 20 Green Walk Ltd | Real estate | 2018 |
| 20 Greville Road Limited | Households | 2024 |
| 20 Gruneisen Road Management Company Ltd | Real estate | 2018 |
| 20 Guyes Ltd | Hospitality | 2023 |
| 20 Gwendwr Road Management Company Limited | Households | 2002 |
| 20 Hampden Gurney Street Limited | Households | 1990 |
| 20 Hampden Road N8 Limited | Households | 2021 |
| 20 Haringey Park, Management Company Limited | Households | 1988 |
| 20 Harley Road Hampstead Management Company Limited | Households | 2010 |
| 20 Harwood Road Limited | Extraterritorial | 2000 |
| 20 Hastings Road Residents Co. Ltd | Households | 2006 |
| 20 Hermon Hill Residents Management Limited | Households | 2016 |
| 20 Highbury Grove Limited | Households | 2013 |
| 20 Hilltop Road Ltd | Hospitality | 2014 |
| 20 Hilly Fields Limited | Households | 2018 |
| 20 Hollybush Hill Limited | Households | 2018 |
| 20 Holmdale Road (Freehold) Limited | Households | 2011 |
| 20 Homefield Road (Freehold) Limited | Households | 2007 |
| 20 Hornton Street Freehold Limited | Real estate | 2025 |
| 20 Hornton Street RTM Company Limited | Households | 2013 |
| 20 HS Opco Limited | Real estate | 2024 |
| 20 Island Farm Avenue Management Company Limited | Transport & logistics | 2016 |
| 20 Ivydale Road Freehold Company Limited | Real estate | 2011 |
| 20 Jefferson House Limited | Real estate | 2022 |
| 20 Kenwyn Road Limited | Households | 2008 |
| 20 Kidbrooke Grove Limited | Households | 1967 |
| 20 Lady Somerset Road Residents Company Limited | Households | 1992 |
| 20 Leamington Road Villas Limited | Real estate | 1998 |
| 20 Lechmere Road Limited | Households | 2010 |
| 20 Lennox Gardens Management Company Limited | Households | 1996 |
| 20 Lindfield Gardens Management Company Limited | Professional & scientific | 2007 |
| 20 Lives Limited | Information & communication | 2024 |
| 20 London Project Consultancy Ltd | Wholesale & retail | 2021 |
| 20 Lonsdale Road Residents' Management Company Limited | Real estate | 2002 |
| 20 Lowndes Square Management Company Limited | Households | 1984 |
| 20 Lupus Street Management Company Limited | Households | 1982 |
| 20 Maclise Road Management Company Limited | Households | 1999 |
| 20 Malden Crescent (Freehold) Ltd | Households | 2013 |
| 20 Mansfield Road Limited | Administrative & support | 2017 |
| 20 Margravine Gardens Limited | Households | 2003 |
| 20 Marlborough Road, London N19 Limited | Administrative & support | 2009 |
| 20 Marloes Road Limited | Households | 2010 |
| 20 Melrose Freehold Limited | Households | 2020 |
| 20 Messina Avenue Limited | Households | 2023 |
| 20 Mirabel Management Limited | Households | 2017 |
| 20 Montpellier Spa Road Limited | Households | 2018 |
| 20 Narcissus Road Management Company Limited | Households | 2011 |
| 20 Nelson Road RTM Company Limited | Administrative & support | 2012 |
| 20 New Cavendish Street Limited | Households | 2001 |
| 20 Northwood Road Management Limited | Households | 2001 |
| 20 NR Ltd | Real estate | 2021 |
| 20 Oaksford Avenue Enfranchisement Company Limited | Hospitality | 2006 |
| 20 Park Avenue Limited | Other services | 2004 |
| 20 Park Avenue N13 Limited | Households | 2017 |
| 20 Parsifal Road Freehold Limited | Households | 2022 |