| Castleton TOR Management Company (Torquay) Limited | Torquay | 1990 |
| Castleton Villas Limited | Cheltenham | 2021 |
| Castletown Beach Tenants Ltd | Weymouth | 2021 |
| Castletown Brae Management Company Ltd | Fintona | 2024 |
| Castleview (Amberley) Freehold Limited | Littlehampton | 2011 |
| Castleview Apartments Management Company Limited | Scarborough | 2007 |
| Castleview II Freehold Company Limited | Marden | 2002 |
| Castleward Management Company Limited | Birmingham | 2013 |
| Castleward Phase 3 Block 1 and 2 Residents Management Company Limited | Birmingham | 2023 |
| Castlewater Gardens Management Company Limited | Londonderry | 2018 |
| Castlewater Wood Management Company Limited | Londonderry | 2019 |
| Castlewood Management Company Limited | Holywood | 2018 |
| Castlewood Trees Limited | London | 2019 |
| Castor Court Management Company Limited | Guildford | 2010 |
| Castor Park Management Limited | Maidstone | 2017 |
| Casual Living Ltd | Halifax | 2024 |
| Casw Propco Limited | Newcastle Upon Tyne | 2025 |
| Caswallen Close Ltd | Dartford | 2022 |
| Caswell Bay Court Company Limited | Swansea | 2004 |
| Caswell Bay Court Management Company Limited | Swansea | 1990 |
| Caswell House Mariners Quay RTM Company Limited | Port Talbot | 2019 |
| Catalina Close (Halesworth) Management Company Limited | Woodbridge | 2022 |
| Catalina Court Limited | Bedford | 1995 |
| Catalina Drive (47-50) RTM Company Limited | Poole | 2005 |
| Catalina Freehold Limited | Wimborne | 2009 |
| Catalina Villas Management Limited | Plymouth | 2002 |
| Catalyst Bicester Management Company Limited | Milton Keynes | 2020 |
| Catalyst Properties Limited | London | 1991 |
| Catalyst Property Development Limited | London | 2024 |
| Caterbrook Limited | Caterham | 1973 |
| Caterham Court (Residents) Limited | Caterham | 2011 |
| Caterpal Limited | Oxford | 1987 |
| Caterstone RTM Company Limited | Wimborne | 2018 |
| Cateryne Court Residents Limited | Norwich | 1987 |
| Cates London Limited | London | 2020 |
| Cates Yard (Wimbledon) Residents Management Company Limited | Upham | 2016 |
| Catesby Grange (Rugby) Management Company Limited | New Milton | 2007 |
| Catesby House Management Company Limited | Solihull | 2003 |
| Catford Hill Freehold Company Limited | Maidstone | 2018 |
| Cathall Park Ltd | London | 2026 |
| Catharine Court (Radley) Management Company Limited | Witney | 2005 |
| Catharine Place (Bath) Management Company Limited | Bath | 1991 |
| Cathcart Gate Estate Management Limited | Gillingham | 2012 |
| Cathcart House Management Limited | Great Sutton | 1974 |
| Cathcart Management Company Limited | Potters Bar | 1989 |
| Cathcart Residents Ltd. | London | 2014 |
| Cathedral Close Management Co.Limited | Portsmouth | 1968 |
| Cathedral Court (Cardiff) Limited | South Glamorgan | 1987 |
| Cathedral Court (Newport) Management Company Limited | Newport | 1999 |
| Cathedral Court (Salisbury) Management Company Limited | York | 2020 |
| Cathedral Court Flats (Newport) Limited | Newport | 1993 |
| Cathedral Court Freehold Limited | St Albans | 1993 |
| Cathedral Court Limited | London | 1999 |
| Cathedral Court Management Co. Limited | St Albans | 1984 |
| Cathedral Court Management Company (Scunthorpe) Limited | Brigg | 1990 |
| Cathedral Court Residents Association Limited | Salisbury | 1973 |
| Cathedral Court RTM Company Limited | Fleet | 2010 |
| Cathedral Freehold Limited | Andover | 2007 |
| Cathedral Gardens (Cardiff) Management Company Limited | Cardiff | 2021 |
| Cathedral Gate (Salisbury) NO.1 Management Company Limited | Salisbury | 2013 |
| Cathedral Gate (Salisbury) NO.2 Management Company Limited | Salisbury | 2013 |
| Cathedral Green Court Limited | Peterborough | 1999 |
| Cathedral Green Management Company Limited | Cardiff | 2003 |
| Cathedral Heights Limited | Newport | 2026 |
| Cathedral House (Pontcanna) Ltd | Cardiff | 2020 |
| Cathedral House RTM Company Limited | Cheltenham | 2025 |
| Cathedral Meadows (Ailcey Road) Limited | Ripon | 2019 |
| Cathedral Meadows RMC Ltd | Ripon | 2021 |
| Cathedral Mews Residents Company Limited | Arundel | 1991 |
| Cathedral Park (Chichester) Management Company Limited | Salisbury | 2020 |
| Cathedral Property Management (Southernhay East) Limited | Exeter | 2022 |
| Cathedral Property Management Ltd | Durham | 2023 |
| Cathedral Rise (Rosary Road) Norwich Management Limited | Bury St Edmunds | 2013 |
| Cathedral View (Durham) Management Company Limited | York | 2018 |
| Cathedral View (Phase 2) ELY Management Company Limited | Cambridge | 2005 |
| Cathedral View (Phase 4) ELY Management Company Limited | Hoddesdon | 2006 |
| Cathedral View (Winchester) Management Limited | Eastleigh | 2015 |
| Cathedral View Old Portsmouth Limited | Old Portsmouth | 2020 |
| Cathedral Views Limited | Southampton | 1996 |
| Cathedral Vista Limited | Ripon | 2011 |
| Cathedral Walk (RTM) Management Company Ltd | Tamworth | 2010 |
| Cathedral Walk (Wells) Management Company Limited | Croydon | 2013 |
| Cathedral Walk Management Limited | Edgware | 2011 |
| Catherine Close Management Limited | Bournemouth | 2020 |
| Catherine Court Limited | New Malden | 1995 |
| Catherine Court Management Company (Farnham) Limited | Farnham | 2010 |
| Catherine Court Management Company (Trumpington) Limited | Cambridge | 2012 |
| Catherine Court Management Limited | Aldershot | 1979 |
| Catherine Court Residents Association Limited | Fareham | 1979 |
| Catherine Grove RTM Company Limited | London | 2025 |
| Catherine House Management Limited | Stockport | 1981 |
| Catherine Place Management Company Limited | Harrow | 2001 |
| Catherine Road Residents (Surbiton) Limited | Surbiton | 1973 |
| Catherine ST Freehold Ltd | Watford | 2016 |
| Catherine Street Management Company (Hereford) Limited | Hereford | 2021 |
| Catherine's Walk Limited | Guildford | 2015 |
| Catherines Court (Solihull) Management Company Limited | Solihull | 2016 |
| Catherines Court Management Limited | Birmingham | 1997 |
| Catherines Well Management Limited | Blandford Forum | 1997 |
| Catherington Park (Waterlooville) Management Company Limited | Southend-On-Sea | 2018 |