| 1 Ladbroke Crescent Management (2014) Limited | London | 2013 |
| 1 Lady Somerset Management Limited | London | 2012 |
| 1 Lancaster Gardens Developments Limited | London | 2014 |
| 1 Landcroft Road Limited | London | 2017 |
| 1 Larkstone Terrace Management Limited | Wiltshire | 2006 |
| 1 Laura Place (Bath) Management Co. Limited | Stockport | 2004 |
| 1 Laura Place Ltd | Aberystwyth | 2019 |
| 1 Leadenhall GP Limited | London | 2017 |
| 1 Leadenhall Nominee Limited | London | 2017 |
| 1 Leicester Road Limited | London | 2021 |
| 1 Leigham Street Management Company Limited | Plymouth | 1996 |
| 1 Livingstone Road Freehold Limited | Hove | 2024 |
| 1 Lyndhurst Gardens Limited | London | 1999 |
| 1 Mackenzie Street Ltd | Slough | 2025 |
| 1 Malvern Grove Freehold Company Limited | Manchester | 2021 |
| 1 Malvern Grove RTM Company Ltd | Chester | 2019 |
| 1 Mark Square Tenant Limited | London | 2015 |
| 1 Mill Ltd | Hounslow | 2022 |
| 1 Million Bricks Ltd | London | 2024 |
| 1 Millway Limited | London | 2017 |
| 1 Minster House Ltd | London | 2024 |
| 1 Mkmn Properties Limited | London | 2023 |
| 1 Mounts View Limited | Hayle | 2025 |
| 1 Move Ahead Property Management Ltd | Exeter | 2026 |
| 1 Move Away Limited | Mitcham | 2022 |
| 1 Mowbray Road (Freehold) Ltd | London | 2025 |
| 1 MSB Limited | Letchworth Garden City | 2024 |
| 1 Nayn Ltd | Harrow | 2021 |
| 1 Nelson Road Management Limited | Bournemouth | 2013 |
| 1 Netherhall Gardens Freehold Limited | Harrow, | 2014 |
| 1 Newburgh Road Limited | London | 2024 |
| 1 Nexus (LE) Limited | Lyme Regis | 2025 |
| 1 Number Properties Ltd | London | 2025 |
| 1 Oak Investments Ltd | Halesowen | 2021 |
| 1 Oakwood Crescent Limited | Pinner | 2021 |
| 1 OFF Investment Limited | Edgware | 2020 |
| 1 OMK Ltd | South Croydon | 2020 |
| 1 Onkar Estates Limited | Northolt | 2024 |
| 1 Onkar Satnam Limited | Croydon | 2024 |
| 1 Onshore Ltd | Tugby | 2020 |
| 1 Oratory Gardens Limited | Chichester | 2020 |
| 1 Orwell Ltd | London | 2017 |
| 1 Oxford Street Limited | Nottingham | 2025 |
| 1 Palace Gate Freehold Limited | Newbury | 2020 |
| 1 Paradise Gardens Limited | London | 2016 |
| 1 Park END Limited | London | 2021 |
| 1 Park Road (Freehold) Limited | Surbiton | 2011 |
| 1 Park Road SE25 Freehold Company Ltd | West Drayton | 2017 |
| 1 Parker Road (Grip Holdings) Limited | Romford | 2023 |
| 1 Parkers Hill Management Co Ltd | London | 2023 |
| 1 Pass Holdings Limited | Sheffield | 2024 |
| 1 Pearson Square Ltd | London | 2023 |
| 1 PEN Park Cottages RTM Company Limited | Bristol | 2011 |
| 1 Penfold Place RTM Company Limited | London | 2024 |
| 1 Percent Estate Agents Ltd | Dorchester | 2026 |
| 1 Plus (Europe) Ltd | London | 2019 |
| 1 Plus Horizon Limited | London | 2019 |
| 1 Poole Road Limited | Southampton | 2023 |
| 1 Portland Street Ltd | Southampton | 2024 |
| 1 Potley Lane Freehold Limited | Corsham | 2026 |
| 1 Pottery Road Limited | Bournemouth | 2023 |
| 1 Poultry Tenant Limited | London | 2017 |
| 1 Preston Limited | Westcliff On Sea | 2022 |
| 1 Preston SUB Ltd | Westcliff On Sea | 2023 |
| 1 Primley Park Management Company Limited | Paignton | 2007 |
| 1 Proinvest Ltd | Buckhurst Hill | 2022 |
| 1 Propco Limited | North Watford | 2018 |
| 1 Prospect Road Management Company Limited | Devon | 2004 |
| 1 Q.P.R. Limited | Caterham | 2014 |
| 1 Quinton Park Ltd | Birmingham | 2026 |
| 1 Ravenstone Road Limited | London | 2004 |
| 1 Red Horse Properties Limited | Kirkliston | 2025 |
| 1 Regency Ltd | Mildenhall | 2023 |
| 1 Regent Investment Limited | Manchester | 2020 |
| 1 Regents Park (Exeter) Management Company Ltd | Exeter | 2024 |
| 1 Residential Limited | Cardiff | 2014 |
| 1 Ribblesdale Road Management Company Limited | London | 2014 |
| 1 Richmond Parade Ltd | Hurstpierpoint | 2025 |
| 1 Richmond Park Road (Management) Limited | Bristol | 1975 |
| 1 Richmond Road Management Company Limited | Aylesford | 2022 |
| 1 Ripplevale Grove Limited | London | 2017 |
| 1 River Lane Limited | Litlington | 2023 |
| 1 Robertson Ltd | Hereford | 2021 |
| 1 Rochfort Place Bath (Management) Limited | Bath | 1988 |
| 1 RPD Ltd | Morden | 2026 |
| 1 RS Holdings Limited | Brentford | 2017 |
| 1 Salisbury House Ltd | London | 2026 |
| 1 Sanford Limited | Burton Upon Trent | 2021 |
| 1 Sawmill LDN Limited | London | 2019 |
| 1 Scope Property Limited | London | 2024 |
| 1 Secure Solutions Ltd | London | 2021 |
| 1 Sham Ltd | Oldham | 2023 |
| 1 Sherbrooke Road Ltd | London | 2007 |
| 1 Shukran Limited | London | 2024 |
| 1 Smithfield Square Ltd | Oxford | 2013 |
| 1 Somers Road Management Company Limited | Milton Keynes | 1998 |
| 1 Southgate Street Ltd | Launceston | 2025 |
| 1 Southview Freehold Ltd | Teignmouth | 2026 |
| 1 Spinningfields Developments Ltd | Manchester | 2006 |
| 1 Spinningfields Investments Ltd | Manchester | 2010 |