| 31 Corsica Street Limited | Households | 2002 |
| 31 Cressida Road Limited | Households | 2012 |
| 31 Croham Road (Freehold) Limited | Households | 2008 |
| 31 Croxley Road Freehold Limited | Households | 2023 |
| 31 Cumberland Street Limited | Real estate | 1995 |
| 31 Drayton Road Limited | Households | 2016 |
| 31 Eardley Crescent Freehold Company Limited | Real estate | 2013 |
| 31 Eardley Road Freehold Limited | Households | 2010 |
| 31 Eastern Road Freehold Management Co. Limited | Households | 2021 |
| 31 Eastlake Road (Freehold) Limited | Households | 2010 |
| 31 Eaton Place Limited | Households | 2002 |
| 31 ELM Grove Management Limited | Professional & scientific | 2002 |
| 31 Elsworthy Road Limited | Other services | 2024 |
| 31 Elvaston Place Freehold Limited | Households | 2011 |
| 31 Estate Management Limited | Real estate | 2021 |
| 31 Estates Limited | Real estate | 2024 |
| 31 Explore Ltd | Professional & scientific | 2023 |
| 31 Garlands Road FMC Limited | Real estate | 2012 |
| 31 Gledhow Gardens (Leaseholders) Limited | Households | 1993 |
| 31 Gleneldon Road Freehold Ltd | Households | 2017 |
| 31 Gloucester Avenue Limited | Administrative & support | 2009 |
| 31 Grosvenor Avenue N5 Ltd | Households | 2021 |
| 31 Grosvenor RD Limited | Real estate | 2012 |
| 31 Groveway Company Ltd | Households | 2024 |
| 31 Harley Street Limited | Real estate | 2014 |
| 31 Harold Road Freehold Limited | Households | 2015 |
| 31 Heath Drive Limited | Real estate | 1975 |
| 31 Helix Road Management Company Limited | Households | 2022 |
| 31 Hemberton Road Tenants Management Company Limited | Households | 2003 |
| 31 Holdings Ltd | Real estate | 2026 |
| 31 Holland Road Kensal Green Limited | Real estate | 2004 |
| 31 Honor Oak Park RTM Company Ltd | Households | 2013 |
| 31 Hoveden Road Freehold Limited | Households | 2010 |
| 31 Humber Road Blackheath Limited | Households | 2003 |
| 31 Inman Road Management Company Limited | Households | 2023 |
| 31 Inverness Ltd | Real estate | 2017 |
| 31 IPS Limited | Households | 2021 |
| 31 Irving Road Management Company Limited | Administrative & support | 2001 |
| 31 Kitto Road RTM Company Limited | Households | 2003 |
| 31 Labs Ltd | Information & communication | 2024 |
| 31 Landor Road (Management) Company Limited | Extraterritorial | 2007 |
| 31 Lavender Gardens Limited | Households | 2006 |
| 31 Leamington Road Villas Freehold Limited | Households | 2024 |
| 31 Lewin Road Management Company Limited | Households | 2007 |
| 31 Local Ltd | Manufacturing | 2025 |
| 31 Louisville Road Freehold Limited | Households | 2016 |
| 31 Lower Belgrave Street Limited | Real estate | 2000 |
| 31 Lyndhurst Drive Freehold Ltd | Real estate | 2026 |
| 31 Mabley Street Limited | Extraterritorial | 2007 |
| 31 Mall Road Management Company Limited | Households | 1996 |
| 31 Maresfield Gardens Limited | Real estate | 1993 |
| 31 Maygrove Road Limited | Households | 1999 |
| 31 Moorhouse Road Limited | Households | 2004 |
| 31 Moreton Terrace Limited | Households | 2017 |
| 31 Moring Road Limited | Administrative & support | 2001 |
| 31 Mowbray Road Ltd | Households | 1996 |
| 31 Munster RD Limited | Professional & scientific | 2000 |
| 31 Muswell Hill Place Management Company Limited | Households | 1993 |
| 31 Netherhall Gardens Freehold Limited | Households | 2021 |
| 31 New Inn Yard Ltd | Other services | 2025 |
| 31 Northwood Road RTM Company Limited | Households | 2016 |
| 31 Oakleigh Crescent Freehold Limited | Real estate | 2015 |
| 31 Ommaney Road Limited | Hospitality | 2004 |
| 31 Panmure Road Management Company Limited | Real estate | 2008 |
| 31 Parkhill Road Freehold Limited | Real estate | 2026 |
| 31 Parliament Hill Residents Association Limited | Households | 1980 |
| 31 Queens Road (Flat Management Company) Limited | Professional & scientific | 2000 |
| 31 Raleigh Road Limited | Households | 2016 |
| 31 Reighton RD Ltd | Households | 2011 |
| 31 Ribblesdale Road Limited | Real estate | 2012 |
| 31 Richford Street Hammersmith Limited | Households | 2007 |
| 31 Ridge Road (Crouch END) Limited | Extraterritorial | 2012 |
| 31 Roland Gardens Limited | Households | 1992 |
| 31 Rosendale RTM Company Limited | Households | 2018 |
| 31 Rowfant Road (Tooting) Limited | Real estate | 2004 |
| 31 Saltoun Road Management Company Limited | Households | 2015 |
| 31 Samos Road Freehold Limited | Households | 2007 |
| 31 Sandmere Road (Management) Co Limited | Households | 2008 |
| 31 Simonds Road Estate Limited | Real estate | 2020 |
| 31 Solon Road Property Company Limited | Households | 2001 |
| 31 Southcote Road Ltd | Hospitality | 2014 |
| 31 ST Andrew's Road, Golders Green Limited | Real estate | 2022 |
| 31 ST Georges Square Limited | Households | 1992 |
| 31 ST. Augustine's Road Limited | Households | 1994 |
| 31 Talfourd Road Limited | Real estate | 2009 |
| 31 the Avenue 1 Limited | Households | 2026 |
| 31 the Little Boltons Limited | Households | 1999 |
| 31 Three Colt Street RTM Company Ltd | Households | 2022 |
| 31 Thurlow Park Management Limited | Households | 2022 |
| 31 Trevor Road Management Limited | Real estate | 2009 |
| 31 Trinity Rise Freehold Ltd | Households | 2018 |
| 31 TS GP Limited | Real estate | 2021 |
| 31 TS Limited Partnership | | 2021 |
| 31 TS Nominee Limited | Real estate | 2021 |
| 31 Union Road Management Company Limited | Households | 1991 |
| 31 Uxbridge Road Limited | Real estate | 2022 |
| 31 Valleyfield Road Residents Association Limited | Extraterritorial | 2001 |
| 31 Wargrave Ltd | Real estate | 2018 |
| 31 Watermint Ltd | Real estate | 2025 |
| 31 West 56TH Street Property Inc. | | 1984 |