| Clarendon Place Management Company Limited | Stevenage | 2002 |
| Clarendon Place Residents Co Limited | Salisbury | 2016 |
| Clarendon Place RTM Company Limited | Brighton | 2019 |
| Clarendon Press Management Limited | Newport | 2004 |
| Clarendon Quay Management Company Limited | 150 Holywood Road | 1998 |
| Clarendon Road (Block B) RTM Co Limited | Leeds | 2023 |
| Clarendon Road (Block C) RTM Co Limited | Leeds | 2023 |
| Clarendon Road (Christchurch) Management Company Limited | Christchurch | 2024 |
| Clarendon Road Flats Management Limited | Stockport | 2006 |
| Clarendon Road(Block a) RTM Co Limited | Leeds | 2023 |
| Clarendon RTM Company Limited | Borehamwood | 2011 |
| Clarendon Square Development Limited | Coventry | 2012 |
| Clarendon Street (Leamington Spa) Management Company Limited | Leamington Spa | 2011 |
| Clarendon UK Management Limited | Kettering | 2021 |
| Clarendon Villas (Ventnor I.W.) Management Company Limited(The) | London | 1986 |
| CLARENDON80 Management Limited | Cheadle | 2024 |
| Clarendons Kent Limited | Croydon | 2021 |
| Clarens 17 Limited | London | 2021 |
| Clareston Court Management Limited | Tenby | 1991 |
| Claret Control Limited | Northampton | 1992 |
| Claret House Residents Limited | Sevenoaks | 1971 |
| Clareville Court Residents Society Limited | London | 1963 |
| Clareways Management Company Limited | Croydon | 2001 |
| Clarice Court Residents Limited | London | 1998 |
| Claridge Court Management Limited | Berkhamsted | 1989 |
| Claridge Park Management Company Limited | Croydon | 2009 |
| Claridges Court (Hemel Hempstead) Management Company Limited | Hatfield | 2004 |
| Clarin Properties Ltd | Weymouth | 2022 |
| Clarinda & Bessborough House RTM Company Limited | Shorne | 2026 |
| Clarion Gate (Chelmsford) Management Company Limited | Southend-On-Sea | 2008 |
| Clarion House Limited | London | 2013 |
| Clarity Housing Limited | Romford | 2021 |
| Clarity Property Management Ltd | Oban | 2026 |
| Clark Cobden Ltd | Southampton | 2018 |
| Clark Drive 1 Apartments Ladden Garden Village Management Company Limited | Reading | 2020 |
| Clark House Management Company Limited | London | 1992 |
| Clarke Court Management Company Limited | Croydon | 1983 |
| Clarke Drive Properties Limited | Sheffield | 1988 |
| Clarke Olesen Properties Ltd | London | 2025 |
| Clarke's Court (Banbury) Management Company Limited | New Milton | 2004 |
| Clarkegrove (Flats) Limited | Burntwood | 1985 |
| Clarkes (Hillingdon) Management Company Limited | Hoddesdon | 1986 |
| Clarkes Avenue (Cheam) Management Company Limited | Kingswood | 1972 |
| Clarkes Court (Management Company) Limited | Chard | 1995 |
| Clarkes Property Ltd | Nailsea | 2023 |
| Clarks Hill (Prestwich) Management Limited | Manchester | 2004 |
| Clarks Mill Management Limited | Trowbridge | 2023 |
| Clarkston Property Management Limited | Glasgow | 2012 |
| Clarkwell Holdings Limited | Crawley | 2025 |
| Clarmont (Castlewellan) Management Company Limited | 150 Holywood Road | 2007 |
| Claro Court (Knaresborough) Management Company Limited | Knaresborough | 2020 |
| Clarota Limited | London | 1986 |
| Clarus Residents Chequers Hill Ltd | Sittingbourne | 2016 |
| Clarus Residents Little Hookstead Farm Limited | Ashford | 2021 |
| Clash Events Limited | Market Harborough | 2016 |
| Clashbest Limited | London | 1993 |
| Class Cover Management Limited | Birmingham | 1975 |
| Class Investing Limited | Shrewsbury | 2018 |
| Class Management Limited | Liskeard | 1986 |
| Classic Estates Limited | London | 1991 |
| Classic Property Investments Limited | Barnet | 1999 |
| Classical JR Cloud Ltd | Carshalton | 2016 |
| Classical Property Services Ltd. | Carshalton | 2001 |
| Classicstone Management Company Limited | London | 1988 |
| Classman Limited | Middlesex | 1995 |
| Classy Comfort Ltd | Manchester | 2019 |
| Clatford Manor House (1990) Limited | Upham | 1990 |
| Clatplan Limited | East Sussex | 1988 |
| Claude Road Limited | London | 2019 |
| Claude Road Management Limited | Cardiff | 1991 |
| Claudia Management Limited | London | 1982 |
| Claudius Court Management Limited | Colchester | 1988 |
| Claughton Mansions (Blackpool) Limited | Lytham St. Annes | 2002 |
| Claus Mcnulty Ltd | Whitstable | 2025 |
| Clavarez Properties Ltd | Hornchurch | 2024 |
| Clavell Management Company Limited | Poole | 2022 |
| Claverdon Court Management Limited | Sutton Coldfield | 1985 |
| Claverdon Park Management Company Limited | Sutton Coldfield | 1983 |
| Claverham House Maintenance Limited | Battle | 1967 |
| Clavering Park Management Company Limited | London | 2025 |
| Claverley Freehold Co Ltd | Westcliff-On-Sea | 2024 |
| Claverley Management Co Ltd | Westcliff-On-Sea | 2017 |
| Claverton Court Management Limited | Bath | 1973 |
| Claverton View Management Company Limited | Bath | 1996 |
| Claverton/House Management Company Limited | Dorking | 1982 |
| Clavin Property Development Ltd | Grays | 2025 |
| Claxby Limited | Woodhall Spa | 1988 |
| Claxton Grange Cottages Management Company Limited | York | 2022 |
| Claxton Mill Residents Association Limited | Norwich | 1996 |
| Clay Croft Management Limited | Croydon | 1994 |
| Clay Cross Estate Management Company Limited | Derby | 2018 |
| Clay Fields View Management Company Limited | Chesterfield | 2019 |
| Clay Green Farm Management Company Limited | Bristol | 2022 |
| Clay Hall Management Company Limited | Copthorne | 2017 |
| Clay Lane Management Company Limited | Torquay | 2011 |
| Clay PIT Close Management Ltd | Newport Pagnell | 2025 |
| Clay Plantation (Oxshott) Limited | Oxshott | 2017 |
| Clayacre Management Limited | Leighton Buzzard | 1978 |
| Claybee Court (Palmerston Road) Property Management Company Limited | Barnet | 2017 |
| Claybourne Gardens Management Company Limited | Chipstead | 2019 |