| 27 Rocks Lane Limited | Professional & scientific | 2001 |
| 27 Roland Gardens Management Limited | Households | 2000 |
| 27 Rowfant Road Limited | Real estate | 2008 |
| 27 Sanders Lane Ltd | Real estate | 2024 |
| 27 Selsdon Road Limited | Households | 2024 |
| 27 Shepherd Market Limited | Real estate | 2017 |
| 27 Skin Ltd | Health & social care | 2026 |
| 27 Somers Road RTM Company Limited | Households | 2023 |
| 27 Spur Hill Limited | Real estate | 2025 |
| 27 ST Anselms Place (Freehold) Ltd | Administrative & support | 2014 |
| 27 ST Johns Park Limited | Households | 2013 |
| 27 ST Margarets Road (Freehold) Limited | Real estate | 2009 |
| 27 ST Stephens Gardens Limited | Households | 1985 |
| 27 ST. Aubyns Road Limited | Households | 2003 |
| 27 ST. Stephen's Terrace Limited | Households | 1990 |
| 27 Stanton Road Management Limited | Households | 2011 |
| 27 Stapleton Hall Road Limited | Households | 2016 |
| 27 Station Road Limited | Households | 2014 |
| 27 Stockwell Road Management Company Limited | Real estate | 2002 |
| 27 Strathblaine Road Management Co Limited | Real estate | 1987 |
| 27 Sutherland Avenue Limited | Households | 2000 |
| 27 Sylvan Road Management Company Limited | Households | 2003 |
| 27 Talent Ltd | Administrative & support | 2020 |
| 27 Telferscot Road Management Limited | Real estate | 2016 |
| 27 TEN Productions Limited | Information & communication | 2010 |
| 27 Teyfo Ltd | Hospitality | 2026 |
| 27 the Drive Limited | Real estate | 2020 |
| 27 the Mercantile Ltd | Real estate | 2024 |
| 27 the Ridgeway (Enfield) Management Company Limited | Real estate | 1986 |
| 27 the Square Management Limited | Households | 2020 |
| 27 Tite Street Freehold Company Limited | Households | 2014 |
| 27 Tremadoc Freehold Limited | Real estate | 2022 |
| 27 Tremlett Grove Limited | Households | 1989 |
| 27 Trevelyan Road Management Services Ltd | Real estate | 2016 |
| 27 Tzfet Estates Limited | Financial services | 2023 |
| 27 Waldram Park Road (Freehold) Limited | Households | 2008 |
| 27 Waller Road Limited | Households | 2004 |
| 27 Whiteley Road Limited | Real estate | 2008 |
| 27 Wrottersley Road Management Company Limited | Households | 1999 |
| 27 York Road Management Limited | Households | 2017 |
| 27, Holmdale Road Limited | Real estate | 1975 |
| 27-29 Gloucester Avenue (Freehold) Limited | Households | 2025 |
| 27-29 John Adam Street Freehold Company Limited | Households | 2018 |
| 27-29 Long Acre Residential Management Company Limited | Real estate | 2002 |
| 27-29 Randolph Crescent Limited | Households | 1981 |
| 27-29 Whitfield Property Limited | Real estate | 2012 |
| 27-37 New Trinity Road Manco Limited | Households | 2022 |
| 27-38 Bushell Close (Freehold) Ltd | Households | 2026 |
| 27/29 Cadogan Square Freehold Limited | Real estate | 2016 |
| 27/29 Hermit ST Freehold Limited | Real estate | 2014 |
| 27/29 New North Road Management Company Limited | Real estate | 2001 |
| 270 - 272 London Road Ltd | Construction | 2026 |
| 270 Cricklewood Lane (Management Company) Limited | Households | 2001 |
| 270 Fragrance Ltd | Wholesale & retail | 2024 |
| 270-296 Fulham Road Management Ltd | Real estate | 2010 |
| 27001 Path Ltd | Information & communication | 2025 |
| 270334 Ltd | Professional & scientific | 2025 |
| 270384 Ltd | Financial services | 2026 |
| 2707 Labs Ltd | Professional & scientific | 2025 |
| 271 Holmesdale Road RTM Company Limited | Households | 2017 |
| 271 Lillie Road RTM Company Ltd | Households | 2025 |
| 271 Liverpool Road (Freehold) Limited | Hospitality | 2012 |
| 2710 Entertainment Ltd | Professional & scientific | 2019 |
| 2710 London Ltd | Other services | 2023 |
| 2717 Network CIC | Education | 2026 |
| 272 African Restaurant Ltd | Hospitality | 2018 |
| 272 Chase Side Management Company Limited | Households | 2026 |
| 272 Elgin Avenue W9 Limited | Households | 2003 |
| 272 ST John's Lane Management Company Limited | Households | 2022 |
| 272 Trinity Road Freehold Limited | Households | 2020 |
| 2728 Global Consult Limited | Real estate | 2023 |
| 2728 Limited | Wholesale & retail | 2015 |
| 2728 Pennethorne Ltd | Households | 2026 |
| 2728 Photos Limited | Professional & scientific | 2025 |
| 273 Advisory Limited | Professional & scientific | 2026 |
| 273 Group Ltd | Households | 2021 |
| 273 Holmesdale Road Managements Limited | Households | 1987 |
| 273 Portobello Ltd | Professional & scientific | 2019 |
| 273K Consulting Ltd | Professional & scientific | 2014 |
| 274 Brixton Hill Limited | Real estate | 2019 |
| 274 Earls Court Road Management Limited | Households | 1974 |
| 274 Earlsfield RD (MAN Co) Limited | Households | 2023 |
| 274 ST. Pauls Road Residents Company Limited | Real estate | 1992 |
| 275 Eversholt Street Limited | Households | 2024 |
| 275 Foundation Ltd | Hospitality | 2024 |
| 275 Kensington Nails Ltd | Other services | 2025 |
| 276 Ferme Park RD Limited | Extraterritorial | 1988 |
| 276 Leahurst Road Limited | Professional & scientific | 2001 |
| 276-272 WBR Limited | Other services | 2023 |
| 276-278 High Road RTM Company Limited | Households | 2025 |
| 278 Brockley RD RTM Company Ltd | Households | 2021 |
| 278 Earls Court Road Management Company Limited | Households | 2006 |
| 278 Hale Lane Freeholders Limited | Real estate | 2006 |
| 278 Hale Lane Management Limited | Households | 1996 |
| 278 Property Co Ltd | Real estate | 2025 |
| 278AG Ltd | Real estate | 2022 |
| 279 Lillie Road (Freehold) Company Limited | Administrative & support | 2011 |
| 279 Wine NOT Limited | Hospitality | 2020 |
| 27:17 Agency Ltd | Other services | 2025 |
| 27A Kilmorie Road (London) Limited | Households | 2012 |