| 66 Alina Limited | Harrow | 2024 |
| 66 Anstey Road RTM Company Limited | Alton | 2016 |
| 66 Ballater Road Limited | London | 2009 |
| 66 Braxted Park (Freehold) Limited | Thornton Heath | 2014 |
| 66 Bricks Limited | Bournemouth | 2019 |
| 66 Brodrick Road Ltd | Tooting | 1995 |
| 66 Bronsart Road Limited | | 2007 |
| 66 Cadogan Square Limited | London | 2006 |
| 66 Castletown Road Limited | | 1995 |
| 66 Chalk Farm Road Limited | London | 2008 |
| 66 Chart Lane Management Limited | Reigate | 2011 |
| 66 Chestnut Road Management Company Limited | London | 2004 |
| 66 Clarendon Road Limited | London | 2001 |
| 66 Cranes Park (Surbiton) RTM Company Limited | Bromley | 2019 |
| 66 Crowland Limited | London | 2021 |
| 66 Dalston Lane (London) RTM Company Limited | Bromley | 2025 |
| 66 Denbigh Street Management Limited | | 1983 |
| 66 Dufferin Avenue Property Management Ltd | Belfast | 2008 |
| 66 Edith Road Limited | London | 1995 |
| 66 Elgin Avenue Limited | | 2005 |
| 66 Ellison Road Management Limited | London | 2013 |
| 66 Fenwick Road Freeholders Limited | London | 2014 |
| 66 Forestreet Ltd | Chobham | 2024 |
| 66 Frithville Gardens Limited | | 2002 |
| 66 Fulham Park Gardens Limited | London | 2007 |
| 66 Ganges Road Ltd | Bristol | 2016 |
| 66 Harbut Road Ltd | | 2003 |
| 66 Harwood Road Limited | Thatcham | 2013 |
| 66 Haverhill Road Limited | London | 2014 |
| 66 High Street Glastonbury Ltd | Wells | 2016 |
| 66 Hillfield Avenue Limited | Reading | 2007 |
| 66 House of Payne Ltd | Hove | 2025 |
| 66 Infinity Limited | Harrow | 2024 |
| 66 Kinmel Street Ltd | Kettering | 2014 |
| 66 Limited | Clacton On Sea | 2013 |
| 66 Longley Road Limited | Upham | 2019 |
| 66 MCL Ltd | Banbury | 2025 |
| 66 Middle Lane Limited | London | 2012 |
| 66 Nelson Road RTM Company Limited | Ipswich | 2009 |
| 66 North Road Management Company Limited | Bristol | 2010 |
| 66 Nuffield Road NO: 1 Limited | Oxford | 2006 |
| 66 Oakfield Road Limited | London | 1999 |
| 66 Pembridge Villas Limited | Oxford | 1998 |
| 66 Phipps House Limited | Ellesmere Port | 2018 |
| 66 Queens Gardens RTM Company Limited | London | 2014 |
| 66 Ridgeway Limited | Plymouth | 2017 |
| 66 SAN Diego Road Management Company Limited | Hampshire | 2004 |
| 66 Sandgate High Street Ltd | Folkestone | 2024 |
| 66 Savernake Road Management Company Limited | London | 1990 |
| 66 Sheephouse Invest Ltd | London | 2025 |
| 66 Shorncliffe Road Folkestone Management Company Limited | Northwood | 2015 |
| 66 South Street ST Austell Limited | Margate | 2021 |
| 66 Southwell Road Management Limited | London | 2011 |
| 66 Streets Limited | Bournemouth | 2019 |
| 66 Sutherland Ltd | South Tottenham | 2013 |
| 66 Sutherland Square Limited | London | 2015 |
| 66 Tahrim Limited | Winchmore Hill | 2025 |
| 66 Tisbury 2F Ltd | Hove | 2021 |
| 66 Tisbury Limited | Hove | 2017 |
| 66 Victoria Road (Penarth) Ltd | Penarth | 2014 |
| 66 Warberry Road West Management Company Limited | Torquay | 2019 |
| 66 Westbourne Terrace Limited | London | 2016 |
| 66 Weston Park Company Limited | London | 2001 |
| 66 Wilberforce Road (Management) Limited | London | 1999 |
| 66 Woodside Park Road Limited | London | 2019 |
| 66-68 Bollo Bridge Road Limited | London | 2005 |
| 66-68 Leachcroft Limited | Gerrards Cross | 2023 |
| 66-77 Sandpiper Close (Greenhithe) RTM Company Limited | Bromley | 2014 |
| 66/67 Ermine Street Management Company Limited | St. Ives | 2000 |
| 66/67 PS Property Limited | London | 2024 |
| 66/68 Masbro Road Residents' Company Limited | | 1999 |
| 664 Holloway Road Ltd | London | 2016 |
| 664 Newmarket Road Limited | Litlington | 2023 |
| 666 LOW Investments Limited | Beverley | 2019 |
| 666 Newmarket Road Limited | Litlington | 2022 |
| 666 Properties Ltd | Hayes | 2024 |
| 666 Property Limited | Preston | 2020 |
| 668 Estates Limited | Kinmel Bay | 2017 |
| 668 Forest Road E17 Limited | London | 2025 |
| 668 Lytham Road Management Company Limited | Stockport | 2007 |
| 668 Properties Ltd | Cheadle | 2026 |
| 668 Property Care Ltd | London | 2025 |
| 669 Finchley Road 2025 Limited | Waltham Cross | 2025 |
| 66BAL Limited | Leicester | 2025 |
| 66HH Limited | Esher | 2014 |
| 66JA Company Limited | Alton | 2008 |
| 67 - 69 Drayton Gardens (Management) Limited | London | 1998 |
| 67 Agar Grove Limited | London | 2009 |
| 67 Alderbrook Road Limited | London | 2003 |
| 67 Alma Road Clifton Bristol Limited | Bristol | 1987 |
| 67 Arthur Road Management Limited | London | 2002 |
| 67 Aylesford Street Limited | Cheshire | 2007 |
| 67 Barry Crescent Ltd | Manchester | 2020 |
| 67 Belsize Park Limited | | 2003 |
| 67 Birdhurst Rise Management Company Ltd | London | 2024 |
| 67 Brent Limited | Gateshead | 2018 |
| 67 Brighton Road Ltd | Beckenham | 2018 |
| 67 Brondesbury Villas Limited | London | 2014 |
| 67 Cathedral Road Management Company Limited | Cardiff | 2021 |
| 67 Chadwick Road Ltd | London | 2017 |