| Crowthorn Mews Management Company Number 3 Limited | Bolton | 2016 |
| Crowthorne Lodge (Block 1) RTM Company Limited | Wokingham | 2025 |
| Crowthorne Lodge (Block 2) RTM Company Limited | Wokingham | 2025 |
| Crowthorne Management Company Limited | Aldershot | 2025 |
| Crowtree Services Limited | Baldock | 2025 |
| Croxden Close Limited | Leighton Buzzard | 2017 |
| Croxford Close Management Company Limited | Seaford | 2018 |
| Croxted Holdings Limited | Woking | 2026 |
| Croxted Management Limited | Croydon | 1993 |
| Croxted Road (207-213) Management Company Limited | London | 1998 |
| Croxteth Liverpool Ltd | Liverpool | 2017 |
| Croxton Court Management Company Limited | Southport | 1975 |
| Croxton Property Management Limited | Huntingdon | 2004 |
| Croxton Road (Thetford) Management Company Limited | Huntingdon | 1990 |
| Croydon Property Management Limited | Thornton Heath | 2026 |
| CROYDON19 Management Limited | London | 2017 |
| Croye House Residents Society Limited | Hampshire | 1970 |
| Croyez Ltd | London | 2025 |
| Croyland Court Limited | Boston | 1985 |
| CRP Estates Ltd | Manchester | 2019 |
| Crpm Limited | London | 2013 |
| Crra Limited | Bournemouth | 2003 |
| CRS Manco Limited | Liverpool | 2015 |
| CRS Property Precision Ltd | Belfast | 2025 |
| CRS Solutions Ltd | Edinburgh | 2025 |
| Cruet House Residents' Company Limited | St. Leonards-On-Sea | 2021 |
| Crug YR Efydd Management Limited | Haverfordwest | 2017 |
| Cruikshank Residents Association Limited | London | 2002 |
| Crumlin Estates 505 Limited | Bangor | 2023 |
| Crumlin Road Management Company Limited | Carrickfergus | 2008 |
| Crump & Krokos Properties Ltd | Sawbridgeworth | 2022 |
| Crumpler Court Residents Management Association Limited | Grafton, Bampton | 2023 |
| Crumplins Meadow Management Company Limited | London | 2020 |
| Crundwell Court Management Co. Limited | Farnham | 1977 |
| Crunwere Close Management Company Ltd | Narberth | 2025 |
| Crusader Court (Redhill) Residents Company Limited | Leatherhead | 1993 |
| Crusader Court Management Company Limited | Bournemouth | 1983 |
| Crusader House & George Street Trading House RTM Company Limited | Lincoln | 2010 |
| Crusader House RTM Company Ltd | Bristol | 2026 |
| Crusoes Management Company Limited | Truro | 1986 |
| Cryals Court Management Limited | Maidstone | 1986 |
| Crylla Valley Management Company Limited | Saltash | 2021 |
| Crypton and Voile RTM Company Limited | London | 2026 |
| Crystal Blue Prop Limited | St Leonards On Sea | 2022 |
| Crystal Clean Bridal Ltd | Sheffield | 2024 |
| Crystal House (Whalley Range) Management Company Limited | Manchester | 2001 |
| Crystal Lodge Limited | Lytham St. Annes | 1985 |
| Crystal Mead Management Company Limited | Shrewsbury | 2011 |
| Crystal Mount RTM Company Ltd | Evesham | 2015 |
| Crystal Palace Park Management Company Limited | Woking | 2012 |
| Crystal Palace Park Road RTE Company Limited | London | 2010 |
| Crystal Palace Parkview Limited | Woking | 2006 |
| Crystal Palace Properties Ltd | London | 2022 |
| Crystal Place Management Limited | Worcester Park | 2011 |
| Crystal Property Maintenance and Waste Management Ltd | Caterham | 2022 |
| Crystal Rooms Ltd | London | 2025 |
| Crystal Sources Limited | Manchester | 2025 |
| Crystal Wharf Management Company Limited | Uxbridge | 2003 |
| Crystalglade Property Developments Limited | | 1990 |
| Crystalised Properties Limited | London | 1986 |
| Crystallize Ltd | London | 2025 |
| CS Block Management Ltd | Luton | 2019 |
| CS Company Secretaries Ltd | Rushden | 2021 |
| CS Holdco Ltd | Broadstone | 2023 |
| CS Maintenance Lancashire Ltd | Blackpool | 2022 |
| CS Property Management Limited | Newcastle Upon Tyne | 2025 |
| CS Services Property Logistics Ltd | Kirkcaldy | 2023 |
| CS81 Property Ltd | Nottingham | 2022 |
| CSA Midlands Limited | Nuneaton | 2022 |
| Csbc Management Limited | London | 2009 |
| Csch Property Ltd | Chester | 2020 |
| CSE Investments Ltd | Pinner | 2018 |
| CSE Residents Property Management Limited | Reading | 2007 |
| CSG Hill Farm Lane and Others Community Interest Company | Chalfont St. Giles | 2021 |
| CSG Housing Ltd | Halifax | 2019 |
| CSG Managed Properties Ltd | London | 2022 |
| CSG Residents Property Management Limited | London | 2010 |
| Csgm Ltd | Manchester | 2026 |
| CSH Associates Limited | Newcastle Upon Tyne | 2014 |
| CSH Group Limited | Shrewsbury | 2019 |
| Cshv IUK ET Devco Limited | London | 2019 |
| CSJ Homes (London) Ltd | London | 2023 |
| CSJ Management Ltd | Farnham | 2020 |
| CSP Assist Ltd | Belfast | 2015 |
| CSW Capital Generation UK Limited | St Albans | 2026 |
| CT Property Management Ltd | Oxted | 2023 |
| CT Twenty Ltd | Folkestone | 2025 |
| CT Wansbrough Group Ltd | London | 2019 |
| CTD Management Ltd | Chichester | 2025 |
| CTK Properties & Maintence Ltd | Jarrow | 2025 |
| Ctlnd Ltd | Cardiff | 2026 |
| Ctmc Limited | Harrogate | 2000 |
| CTW Management Limited | Edgware | 2009 |
| Cuan Mews Management Ltd | Belfast | 2017 |
| Cube Property Solutions Limited | Milton Keynes | 2017 |
| Cube Refurbishments Ltd | Wakefield | 2020 |
| Cubert Holywell Property Management Company Limited | Truro | 2020 |
| Cubic Holdings Ltd | Bradford | 2024 |
| Cubic One Property Services Ltd | Bishop'S Stortford | 2025 |
| Cubitt Apartments Management Company Limited | Salisbury | 2014 |