| Blenheim Court (Firstgate) RTM Company Limited | Uxbridge | 2023 |
| Blenheim Court (Fleet) Management Company Limited | Farnham | 2001 |
| Blenheim Court (Leicester) Management Company Limited | Northampton | 2015 |
| Blenheim Court (Liss) Management Limited | Liss | 2021 |
| Blenheim Court (Oxford) Limited | Kidlington | 2003 |
| Blenheim Court (Winchcombe) Limited | Bristol | 2002 |
| Blenheim Court (Woodford Green) Limited | Loughton | 1991 |
| Blenheim Court Freeholders Limited | Southampton | 1999 |
| Blenheim Court Management (Westbourne) Limited | Bournemouth | 1995 |
| Blenheim Court Management Company (Scarborough) Limited | Scarborough | 2005 |
| Blenheim Court Neyland Ltd | Milford Haven | 2011 |
| Blenheim Court Residents Company (Woodstock) Limited | Witney | 1983 |
| Blenheim Court Residents Management Limited | London | 1973 |
| Blenheim Court Residents RTM Company Limited | Epsom | 2013 |
| Blenheim Crescent Limited | Potters Bar | 1983 |
| Blenheim Croy Limited | Kingswood | 2025 |
| Blenheim Flats Residents' Association (Wimbledon) Limited | London | 1965 |
| Blenheim Gardens (Chichester) Management Limited | Arundel | 2018 |
| Blenheim Gardens (Dibden Purlieu) Management Company Limited | Southampton | 2022 |
| Blenheim Gardens (Winsford) Management Company Limited | Stockport | 1991 |
| Blenheim Gardens Ltd | Woking | 2018 |
| Blenheim Gardens Property Company Limited | | 2000 |
| Blenheim Gate (Woodstock) Management Limited | Henley-On-Thames | 2012 |
| Blenheim Gate Management Limited | Dartford | 2001 |
| Blenheim Heights Management Company Limited | Witney | 2013 |
| Blenheim House Flats Management Limited | London | 1981 |
| Blenheim House Management (Beckenham) Limited | Beckenham | 2002 |
| Blenheim House Management (Cheltenham) Limited | Gloucester | 1986 |
| Blenheim House Management Company Limited | Pudsey | 2006 |
| Blenheim Investing Ltd | London | 2024 |
| Blenheim Management Company Limited | Swindon | 2008 |
| Blenheim Mews (Sheffield) Limited | Sheffield | 2005 |
| Blenheim Mews (Westbourne) Management Limited | Bournemouth | 2003 |
| Blenheim Mews Flats Limited | Farnham | 2010 |
| Blenheim Mews Freehold Ltd | Radlett | 2014 |
| Blenheim Mews Management Company Limited | Redcar | 1989 |
| Blenheim Mews Residents Company Limited | London | 2005 |
| Blenheim Park (Bracknell) Management Company Limited | Fleet | 2013 |
| Blenheim Park Freehold Limited | Wallington | 2021 |
| Blenheim Place (Camberley) Management Company Limited | Croydon | 2004 |
| Blenheim Place (Norwich) Management Company Limited | Norwich | 2001 |
| Blenheim Place (Wembley Park) Management Limited | Seaton | 1978 |
| Blenheim Place (Witney) Management Company Ltd | Witney | 2015 |
| Blenheim Residents Management Limited | Leighton Buzzard | 1994 |
| Blenheim Road (Kidlington) Management Company Limited | Oxford | 1974 |
| Blenheim Road (Lincoln) Management Company Limited | Lincoln | 2014 |
| Blenheim Road (Minehead) Management Company Limited | Minehead | 1990 |
| Blenheim Road Harrow Management Limited | Harrow | 1985 |
| Blenheim RTM Company Limited | South Croydon | 2011 |
| Blenheim Square (North Weald) Management Limited | Brentwood | 2010 |
| Blenheim Terrace Management Limited | London | 2005 |
| Blenholme Court Management (Hampton) Limited | Croydon | 2004 |
| Blenkett View Management Company Limited | Grange-Over-Sands | 2017 |
| Blenman Property Ltd. | Romford | 2021 |
| Blenmore Properties Limited | Thirsk | 1998 |
| Blenstock Flat Management Company Limited | Chelmsford | 1983 |
| Bleriot Gate Addlestone Management Company Limited | Hoddesdon | 2015 |
| Bless Properties Ltd | Glasgow | 2026 |
| Bless This Mess Ltd | London | 2021 |
| Bletchingdon Park Mews Management Limited | Kidlington | 1991 |
| Bletchingley Castle Management Ltd | Midhurst | 2013 |
| Bletchley Park Management Company Limited | New Milton | 2007 |
| Blewbury Down Mews (Compton) Management Company Limited | Newbury | 2005 |
| Blewitt Court Residents Association Ltd | Witney | 1999 |
| Blighwood 57 Management Limited | Christchurch | 1997 |
| Blind Beck House Limited | Blackpool | 1991 |
| Blinne Court Management Co Ltd | Belfast | 2017 |
| Bliss Mill Management Limited | Worcester | 1993 |
| Bliss Willows (Chipping Norton) Management Company Limited | Camberley | 2025 |
| Blissett House Limited | London | 2001 |
| Blissfield Gardens (Chipping Norton) Management Company Limited | Salisbury | 2005 |
| Blisswell Limited | Brighton | 2019 |
| Blisworth Mill Management Company Limited | Northampton | 1999 |
| Bliving Limited | Birmingham | 2022 |
| BLK Glow Ltd | Hull | 2026 |
| Blobcorp Limited | Surrey | 2004 |
| Bloc Property Services Limited | London | 2016 |
| Block 1 Cedar Hall (Management) Company Limited | Bristol | 1984 |
| Block 1 Esplanade Court RTM Company Limited | Great Yarmouth | 2010 |
| Block 1 Martello Quay Residents Company Limited | Shrewsbury | 2003 |
| Block 1 Mayflower Court RTM Company Limited | London | 2014 |
| Block 1 Riddell Court Freehold Limited | London | 2008 |
| Block 10 Ashley Gardens Limited | London | 1982 |
| Block 12 Dove Phoenix Park Limited | Leighton Buzzard | 2024 |
| Block 18-28 Crofton Way Management Company Limited | Enfield | 2002 |
| Block 2 Cedar Hall (Management) Company Limited | Bristol | 1984 |
| Block 2 Limited | Mansfield | 2001 |
| Block 2 Martello Quay Residents Company Limited | Shrewsbury | 2003 |
| Block 21 Ledgard RTM Company Limited | Chorley | 2025 |
| Block 3 Cedar Hall (Management) Company Limited | Bristol | 1984 |
| Block 3 Martello Quay Residents Company Limited | Eastbourne | 2003 |
| Block 3 Vivian Mansions Management Company Limited | Swansea | 1986 |
| Block 4 Alpine Court Kenilworth RTM Limited | Kenilworth | 2014 |
| Block 4 Cedar Hall (Management) Company Limited | Bristol | 1984 |
| Block 4 Esplanade Court RTM Company Ltd | Stowmarket | 2020 |
| Block 4 Mindenhurst (I&J) Management Company Limited | Hook | 2025 |
| Block 4 Phoenix Park Property Management Company Ltd | St. Albans | 2024 |
| Block 4 Riddell Court Limited | London | 2008 |
| Block 4 Rushlake Limited | Eastbourne | 2008 |
| Block 6 Ashley Gardens Limited | London | 1984 |