| Bryn Castell Residents Management Company Limited | Birmingham | 2025 |
| Bryn Celyn Management Limited | Usk | 2021 |
| Bryn Celyn Residents Management Company Limited | Swadlincote | 2012 |
| Bryn Coed Management Ltd | Sheffield | 2017 |
| Bryn Cregin Management Limited | Conwy | 1999 |
| Bryn Derw Management Company Limited | Shropshire | 2020 |
| Bryn Dethol (Llangollen) Management Limited | Llangollen | 2006 |
| Bryn Edwin Management Company Limited | Flint | 2005 |
| Bryn Eithin Management Limited | Altrincham | 1995 |
| Bryn Heulog Management Company Limited | Colwyn Bay | 2019 |
| Bryn Jones Property Services Ltd | Gwynedd | 2006 |
| Bryn Mansions Management Limited | Weston-Super-Mare | 1988 |
| Bryn Menai Apartments Limited | Llanfairfechan | 2020 |
| Bryn MOR Management Limited | Cardiff | 1984 |
| Bryn Mostyn RTM Company Limited | Colwyn Bay | 2017 |
| Bryn Parciau CYF | Porthmadog | 2023 |
| Bryn Y BIA Management Company Limited | Llandudno | 2001 |
| Bryn Y BIA RTM Company Limited | Colwyn Bay | 2018 |
| Bryn Y MOR Management Tenby 2015 Limited | Cardiff | 2015 |
| Bryn Y PYS (Overton) Management Company Limited | Wrexham | 2021 |
| Bryn-Y-Coed Flats (Management) Limited | Bangor | 1978 |
| Brynards Park Apartments Management Company Limited | New Milton | 2016 |
| Brynards Park Development Management Company Limited | New Milton | 2015 |
| Brynards Park Management Company Limited | New Milton | 2011 |
| Bryncleddau (Caerphilly) Management Company Limited | Bourne End | 2006 |
| Bryneithin Group Ltd | Barry | 2022 |
| Brynfield Court Owners Limited | Cardiff | 1992 |
| Brynford Villas RTM Company Ltd | Nottingham | 2020 |
| Bryngwyn Manor Freehold Limited | Hereford | 2020 |
| Bryngwyn Village Management Company Limited | New Milton | 2005 |
| Brynhyfryd Grove Management Company Limited | Abergele | 2021 |
| Bryniau Brithdir Management Company Limited | Dolgellau | 2009 |
| Brynland Court Management Company Limited | Croydon | 2004 |
| Brynmaer House Management Limited | Camberley | 2014 |
| Brynmaer Road Ltd | London | 2023 |
| Brynmair Management Company (Tywyn) Limited | Tywyn | 2006 |
| Brynmead Court Management Company Limited | Swansea | 2016 |
| Brynmoor (Harpers Lane) Management Company Limited | York | 2008 |
| Brynmwyn Residents Management Company Limited | Ammanford | 2005 |
| Brynonnen Residents Management Limited | Cardigan | 1989 |
| Brynrefail Chapel Management Company Limited | Caernarfon | 2019 |
| Brynteg Management Company Limited | Chester | 2008 |
| Bryntirion (Block D) RTM Company Limited | Swansea | 2020 |
| Bryntirion Apartments 1-6 RTM Company Limited | Llanelli | 2010 |
| Bryntirion Management Company Limited | Knighton | 2006 |
| Brynview Management Limited | Wigan | 2007 |
| Bryterard Limited | Bexhill-On-Sea | 1964 |
| BS02 Properties Limited | London | 2026 |
| BS2 Lofts Management Company Limited | Bristol | 2005 |
| Bsap Property Limited | York | 2019 |
| BSC Holdings Ltd | Cobham | 2024 |
| BSC Kknd Ltd | Birmingham | 2024 |
| BSC Owners Ltd | Cockermouth | 2021 |
| BSC Property Ltd | Maidstone | 2020 |
| Bsgp Ltd | Westcliff-On-Sea | 2024 |
| BSK Properties Ltd | Oldham | 2017 |
| Bsky Ventures Limited | London | 2025 |
| BSL & AKL Limited | Denham | 2023 |
| BSM Management Limited | London | 2024 |
| Bspk Mgmt Ltd | London | 2020 |
| Bsrc Property Solutions Ltd | Brighton | 2020 |
| BTC (London) Limited | London | 2013 |
| BTC Midlands Ltd | Coventry | 2021 |
| BTF Properties Limited | Macclesfield | 2012 |
| BTH Repairs Ltd | Enfield | 2021 |
| BTL Management Ltd | Manchester | 2026 |
| Btlp Limited | Worthing | 2018 |
| BTO (Shitterton) Management Company Limited | Wareham | 2017 |
| BTS Properties Ltd | Wimborne | 2019 |
| Bubba Abarkments Ltd | Sheffield | 2024 |
| Bubba Elvis Limited | London | 2001 |
| Bubblemark Limited | | 1984 |
| Bubs & Dude Ltd | London | 2023 |
| Bubwith Close (Management) Limited | Chard | 1983 |
| Bubwith Close Limited | Chard | 1982 |
| Buccaneer House Residents Ltd | Hampton | 2006 |
| Bucephalus Property Ltd | Swansea | 2023 |
| Buchan Close Management Limited | Harlow | 2023 |
| Buchanan Court Management Limited | Sutton | 1973 |
| Buchanan Gardens Management Company Limited | Hoddesdon | 2006 |
| Buchanan House Limited | Uxbridge | 1993 |
| Buchanan Mews (Fleet) Management Company Limited | London | 2022 |
| Buchanan Residential Ltd | Glasgow | 2023 |
| Buchanan Square (Solihull) Management Company Limited | Birmingham | 2001 |
| Buchanan's Place Management Company Limited | Winchester | 2017 |
| Buchanan's Wharf Management Company Limited | Bristol | 1987 |
| Buck House (Chesham) Management Company Limited | Uxbridge | 2015 |
| Buckby Grange at Burton Latimer Management Company Limited | New Milton | 2016 |
| Buckby Meadows Management Limited | London | 2013 |
| Buckden Court Flats Limited | Croydon | 1994 |
| Buckelsayers RTM Company Ltd | Hastings | 2018 |
| Buckenham (Attleborough) Management Limited | St Albans | 2022 |
| Buckfast Street Residents Limited | London | 2002 |
| Buckfields Lyme Regis Management Limited | Shrewsbury | 2012 |
| Buckhurst Court Limited | East Sussex | 1956 |
| Buckhurst Gate Residents Company Limited | Southend-On-Sea | 2005 |
| Buckhurst Lodge Residents' Company Limited | Bexhill-On-Sea, East Sussex | 2022 |
| Buckhurst Management Ltd | Colchester | 2011 |
| Buckhurst Place Management Limited | Wadhurst | 2003 |
| Buckhurst Way RTM Company Limited | Buckhurst Hill | 2015 |