| 27 Elms Road Management Limited | Households | 2001 |
| 27 Elsham Road Limited | Households | 1979 |
| 27 Esmond Road Limited | Households | 2002 |
| 27 Essendine Road Management Co. Limited | Real estate | 1993 |
| 27 Estelle Road Limited | Professional & scientific | 2008 |
| 27 Exeter Road London Limited | Households | 2012 |
| 27 Fenwick Road Limited | Households | 2000 |
| 27 Ferndale Road Limited | Households | 2021 |
| 27 Films Production Ltd | Information & communication | 2025 |
| 27 Finsbury Park Management Ltd | Households | 2025 |
| 27 Firsby Limited | Real estate | 2022 |
| 27 Fleet Street Birmingham Holdco Limited | Financial services | 2023 |
| 27 Fleet Street Birmingham Limited | Real estate | 2023 |
| 27 Formosa Street Limited | Real estate | 2015 |
| 27 Games Ltd | Manufacturing | 2021 |
| 27 Garrick Street RTM Company Limited | Households | 2025 |
| 27 Gascony Avenue Limited | Households | 1996 |
| 27 Georgian Limited | Hospitality | 2021 |
| 27 Gledhow Gardens Freehold Limited | Households | 2020 |
| 27 Goldhurst Terrace (London NW6) Management Limited | Households | 2016 |
| 27 Gordon Road (Management) Limited | Real estate | 2003 |
| 27 Gorse Rise Invest Ltd | Real estate | 2025 |
| 27 Group Ltd | Construction | 2023 |
| 27 Grove Park Camberwell Limited | Extraterritorial | 2012 |
| 27 Gwendolen Avenue (Management) Limited | Households | 1991 |
| 27 Hallswelle Road Limited | Households | 2020 |
| 27 Hambalt Road Management Limited | Real estate | 2017 |
| 27 Holden Road (Freehold) Limited | Households | 2003 |
| 27 Holland Park Avenue Limited | Households | 1985 |
| 27 Holland Park Gardens Kensington Limited | Households | 2008 |
| 27 Holland Park Residents Limited | Households | 1996 |
| 27 Holland RD Limited | Households | 2023 |
| 27 Hoveden Road Limited | Real estate | 2009 |
| 27 Howitt RD NW3 Limited | Households | 2016 |
| 27 HRG Freehold Company Limited | Households | 2014 |
| 27 Inglethorpe Street Limited | Households | 2021 |
| 27 Kenilworth Road Management Limited | Real estate | 2025 |
| 27 Kensington High Street Ltd | Real estate | 2020 |
| 27 Kent Gardens Limited | Households | 2002 |
| 27 Kent House Road Limited | Real estate | 2016 |
| 27 KGS Road Ealing Company Ltd | Households | 2025 |
| 27 Kildare Terrace Management Limited | Households | 1997 |
| 27 Kimberley Gardens Limited | Households | 2001 |
| 27 Kingsmead Ltd | Real estate | 2021 |
| 27 Knightsbridge Limited | Real estate | 2017 |
| 27 Lady Somerset Road RTM Limited | Households | 2007 |
| 27 Ladywell Freehold Limited | Extraterritorial | 2009 |
| 27 Lancaster Avenue Limited | Households | 1995 |
| 27 Lancaster Gate Holdings Limited | Financial services | 2022 |
| 27 Lancaster Gate Limited | Real estate | 2022 |
| 27 Lanhill Road Limited | Households | 2015 |
| 27 Lanhill Road RTM Co Limited | Households | 2011 |
| 27 Lennox Freehold Limited | Households | 2008 |
| 27 Lewisham Park Management Company Limited | Extraterritorial | 1998 |
| 27 Lexham Gardens Limited | Households | 2006 |
| 27 Lindore Road Management Co Ltd | Real estate | 2008 |
| 27 Loftus Road Management Company Limited | Households | 2002 |
| 27 Longridge Road Management Company Limited | Households | 1995 |
| 27 Mabley Street Residents Ltd | Real estate | 2017 |
| 27 Manor Road Freehold Limited | Households | 2017 |
| 27 Marius Road Freehold Limited | Real estate | 2010 |
| 27 Mattock Lane Company Limited | Households | 2019 |
| 27 Mattock Lane RTM Company Limited | Households | 2019 |
| 27 Mayfair Ltd | Real estate | 2024 |
| 27 Mayflower Road Freehold Limited | Real estate | 2016 |
| 27 Mgmt Ltd | Professional & scientific | 2025 |
| 27 Millway Freehold Limited | Real estate | 2022 |
| 27 Model Management Limited | Administrative & support | 2012 |
| 27 Montford Place Limited | Households | 1998 |
| 27 Montpelier Road Limited | Real estate | 1989 |
| 27 Moray Road Residents Ltd | Households | 2014 |
| 27 Moresby Limited | Real estate | 2022 |
| 27 Mount Pleasant Road Freehold Limited | Households | 2024 |
| 27 Mount Pleasant Villas Freehold Limited | Other services | 2020 |
| 27 Mountgrove Road Management Company Ltd | Real estate | 2005 |
| 27 Nelmes Way (MV) Ltd | | 2013 |
| 27 Netherwood Road Freehold Limited | Real estate | 2002 |
| 27 New King's Road Limited | Administrative & support | 1997 |
| 27 North Parade Management Company Limited | Households | 1989 |
| 27 North Villas (Management) Limited | Households | 1988 |
| 27 Northbrook Road (Freehold) Limited | Real estate | 2009 |
| 27 October Ltd | Wholesale & retail | 2023 |
| 27 Offerton Road Management Limited | Hospitality | 1986 |
| 27 Osborne Road Management Limited | Real estate | 2004 |
| 27 Parkhill Road Limited | Households | 1990 |
| 27 Parsons Green Freehold Limited | Households | 2018 |
| 27 Passmore Street Limited | Real estate | 2022 |
| 27 Penywern Road Management Limited | Real estate | 2001 |
| 27 Pixels Ltd | Professional & scientific | 2016 |
| 27 Pont Street Limited | Households | 1965 |
| 27 Porchester Square Limited | Households | 2014 |
| 27 Porten Road Limited | Households | 2011 |
| 27 Prince of Wales Road Freehold Limited | Households | 2012 |
| 27 Priory Road Limited | Households | 1999 |
| 27 Properties Limited | Real estate | 2013 |
| 27 Provost Street Management Limited | Households | 2001 |
| 27 Queens Gate RTM Company Limited | Real estate | 2008 |
| 27 Quintin Avenue (Freehold) Limited | Households | 2024 |
| 27 Raleigh Road (Exeter) Management Company Limited | Households | 2024 |
| 27 Ringford Road Freehold Limited | Administrative & support | 2017 |