| Clun Terrace RTM Company Limited | Seaton | 2011 |
| Clune Court (Shenfield) Management Limited | Chelmsford | 1990 |
| Cluntergate Management Company Limited | Barnsley | 2016 |
| Cluny Croft Residents Limited | Essex | 2002 |
| Cluny Mews Management Company Limited | Salford | 2022 |
| Clutter Clear & Maintenance Services Ltd | London | 2025 |
| Clutton (Agricultural) Limited | London | 1990 |
| CLW Property Group Ltd | Melton Mowbray | 2026 |
| Clwfm Ltd | Ely | 2019 |
| CLX Property Management Limited | London | 2023 |
| CLY Wilbraham Management Limited | Manchester | 1988 |
| Clyde & Langbourne Flat Management Company Limited | Croydon | 2000 |
| Clyde Contracts Limited | Dumbarton | 2013 |
| Clyde House Freehold Limited | Bournemouth | 2001 |
| Clyde House Residents (Ryde) Management Company Limited | Ryde | 2005 |
| Clyde House RTM Company Limited | Hereford | 2013 |
| Clyde Legacy Property Ltd | East Kilbride | 2025 |
| Clyde Lodge Management Company (Exmouth) Limited | Exmouth | 2003 |
| Clyde ODD Jobs Ltd | Glasgow | 2022 |
| Clyde Park House Management Co. Limited | | 1981 |
| Clyde Property Management Limited | Manchester | 2006 |
| Clyde Road Management Company Limited | Manchester | 1989 |
| Clyde Road RTM Company Limited | Edgware | 2010 |
| Clydesdale Court Management Co. Limited | Stratford-Upon-Avon | 1988 |
| Clydesdale Whetstone Limited | St. Albans | 1996 |
| Clyffe House Flat Management Limited | Dorchester | 1986 |
| Clyne Estate Management Limited | Swansea | 2004 |
| Clynnog Farm Maintenance Ltd | Llanfairpwllgwyngyll | 2006 |
| Clyro Court Freehold Limited | London | 2017 |
| Clyst Hayes Gardens Limited | Budleigh Salterton | 2011 |
| Clystlands Management Limited | Exeter | 2005 |
| Clytha SQ 31 Ltd | London | 2019 |
| Clytha Square Residents Association Limited | Newport | 1995 |
| CM-PMS69 Ltd | Leicester | 2020 |
| CM14 Management Limited | Brentwood | 2018 |
| CMA Property Group Limited | Overstone | 2025 |
| Cmbt Properties Ltd | Southport | 2014 |
| Cmcg Property Services Ltd | Usk | 2022 |
| Cmcs Property Limited | London | 2022 |
| Cmcw Ltd | Stockport | 2025 |
| CMF Farm Bushes Limited | Salisbury | 2024 |
| CMF Old Dairy Limited | Salisbury | 2024 |
| CMF Property Rental Limited | London | 2023 |
| CMF Stable Cottage Limited | Salisbury | 2024 |
| CMG Property Rental Limited | Dereham | 2022 |
| Cmgc Properties Ltd | Carluke | 2026 |
| CMH Admin Limited | Forest Row | 2024 |
| CMH Collective Ltd | Radstock | 2026 |
| CMH Grays Inn Ltd | Hertford | 2012 |
| CMI Property Management Limited | Caterham | 2026 |
| Cmips Management Limited | Chigwell | 2021 |
| Cmkm Investments Limited | Watford | 2025 |
| CML Signature Properties Ltd | Harlow | 2025 |
| CMM Property Holdings Limited | Hull | 2024 |
| CMP Building Ltd | Dartford | 2020 |
| CMR Property Renovations Ltd | Reading | 2025 |
| Cmra Bollington RTM Company Limited | Stockport | 2006 |
| CMS Land Projects Limited | Cardiff | 2016 |
| CMT Developments Ltd | Edgware | 2013 |
| CMT Investments Limited | Leicester | 2024 |
| CN Assured Ltd | Manchester | 2022 |
| CN Hawkes Holdings Ltd | Glasgow | 2025 |
| CN Secretarial Limited | Addlestone | 2006 |
| CNC Properties NE Ltd | Middlesbrough | 2025 |
| Cnewman Investments Ltd | Canterbury | 2024 |
| CNF Management Company Limited | Dorking | 2024 |
| CNP91 Limited | London | 2025 |
| CNX Property Limited | Glasgow | 2022 |
| Co Investing Ltd | Kingston Upon Thames | 2025 |
| Co-Owners Club Ltd | Edinburgh | 2020 |
| Co-Ownership Club Ltd | Edinburgh | 2018 |
| CO13 Limited | Ipswich | 2018 |
| CO2ZERO Wilder Street Management Company Limited | Clevedon | 2021 |
| Coach Court Amenity Company Limited | Fladbury | 1990 |
| Coach Horse Lane Management Company Limited | Downpatrick | 2007 |
| Coach House (Barton) Management Limited | Swadlincote | 2020 |
| Coach House (Elms Court) Management Limited | London | 1997 |
| Coach House (Managers) Limited | Weston-Super-Mare | 1983 |
| Coach House (Shanklin) Management Company Limited | East Cowes | 1989 |
| Coach House (Shepton Mallet) Management Company Limited | Radstock | 2001 |
| Coach House (Steeton) Management Company Limited | Keighley | 2004 |
| Coach House (Tewkesbury) Management Limited | Swindon | 2000 |
| Coach House (Woldingham) Residents Limited | Woldingham | 1987 |
| Coach House Close Limited | Camberley | 2012 |
| Coach House Corner Ltd | Cardiff | 2018 |
| Coach House Court (Gamlingay) Limited | Sandy | 2005 |
| Coach House Court (Wetherby) Limited | Leeds | 2008 |
| Coach House Court (Wood Gate) Management Company Limited | Loughborough | 2002 |
| Coach House Court Management Company Limited | Lancashire | 1999 |
| Coach House Mews (Arlesey) Limited | Bedford | 2011 |
| Coach House Mews (Bedford) Management Company Ltd | Bedford | 2019 |
| Coach House Mews (Cowfold) Limited | Horsham | 2018 |
| Coach House Mews (Redhill) Limited | Croydon | 1989 |
| Coach House Mews (Rowde) Management Company Limited | Devizes | 2005 |
| Coach House Mews (Titchfield) Limited | Fareham | 2010 |
| Coach House Mews (Walton on Thames) Management Company Limited | Leatherhead | 2011 |
| Coach House Mews (Warwick) Residents Association Limited | Solihull | 2003 |
| Coach House Mews (Wimborne) Management Limited | Wimborne | 2008 |
| Coach House Mews Limited | Coventry | 2004 |
| Coach House Mews Management Company Limited | Preston | 1993 |