| Corran Mews Management Co. Ltd | Ballyclare | 2011 |
| Corraquil Country Cottages Limited | Belfast | 2022 |
| Corrib Menlow Limited | London | 2000 |
| Corrie Lodge Residents Limited | Eastbourne | 1989 |
| Corrie Road (Addlestone) Management Company Limited | Sherborne | 1988 |
| Corrigandickestates Ltd | Kilmarnock | 2025 |
| Corrin House (Maintenance) Company Limited | Haywards Heath | 1963 |
| Corrody Developments Management Company Limited | Derry | 2025 |
| Corrywood Apartments (Management) Ltd | Co Down | 2002 |
| Corsair Properties Limited | Nottingham | 2025 |
| Corscombe Close Estate Management Company Limited | Dorchester | 2024 |
| Corse Grange Management Company Limited | Gloucester | 2017 |
| Corsham Court Residents' Association Limited | St. Leonards-On-Sea | 1992 |
| Corsham Properties Limited | Corsham | 2022 |
| Corsica Freehold Limited | Tadworth | 2025 |
| Corsica Street 567 Limited | London | 2016 |
| Corsicans Management Company Limited | Hoddesdon | 1993 |
| Corson Court Property Management Co Limited | Leeds | 2014 |
| Corston Hollow Limited | Dorking | 2011 |
| Corston Hollow Residents Limited | Dorking | 1981 |
| Corston House (Ryde) Management Company Limited | Whippingham | 2017 |
| Cortad Limited | Hove | 1989 |
| Cortayne CRT. Freehold Limited | Twickenham | 2026 |
| Corteck Limited | | 1996 |
| Cortex Property Services Limited | Fareham | 2024 |
| Cortexstyle Ltd | London | 2025 |
| Cortez Limited | Mansfield | 2017 |
| Cortlan Limited | | 1997 |
| Cortland House Management Company Limited | Etchingham | 2014 |
| Cortlands Management Company Limited | Hatfield | 2021 |
| Cortmerron Freehold Limited | Poole | 2005 |
| Corton House Management Limited | St. Leonards-On-Sea | 2006 |
| Corvette Management (Dawlish) Limited | Devon | 1979 |
| Corwell (3) Management Limited | Great Missenden | 2009 |
| Corwell (4) Management Limited | Marlow | 2016 |
| Corylus Planning & Environmental Ltd | Cirencester | 2005 |
| Cosack House Limited | Tunbridge Wells | 1990 |
| Cosegrainge Management Limited | Stourbridge | 2017 |
| Coseley (Freeholders) Management Company Limited | Droitwich | 2000 |
| Coseley New Village Management Company Limited | York | 2023 |
| Cosgrove & Dunnett Property Consultants Limited | Chester Le Street | 2024 |
| Cosgrove Road Management Company Limited | London | 2020 |
| Cosham Mews Management Ltd | Portsmouth | 2022 |
| Cosmia Court Flats Limited | Windsor | 2005 |
| Cosmosmark Limited | London | 1986 |
| Cospicua Commercials Limited | Liverpool | 2025 |
| Cossack Lane House (Winchester) Limited | Southampton | 1974 |
| Cossington Court Limited | Sidcup | 1990 |
| Cossington Grange Management Company Limited | Swadlincote | 2012 |
| Cossington Mews (Residents) Management Company Limited | Hoddesdon | 2004 |
| Cosstick Freeholdings Ltd | Stonehouse | 2026 |
| Costa Consultant Ltd Ltd | Tamworth | 2025 |
| Costa L&C Ltd | Preston | 2025 |
| Costa Maintenance Limited | Oxted | 2014 |
| Costello Court Management Limited | Cambridge | 1989 |
| Costello Lettings Ltd | Ferndown | 2007 |
| Costermonger Building RTM Company Limited | London | 2023 |
| Costers Close Management Company Limited | Bristol | 2021 |
| Costessey Management Company Limited | Salisbury | 2006 |
| Costons Greenford Limited | Taunton | 2026 |
| Cosway Court Management Company Limited | Swindon | 2020 |
| Cosway Mansions Limited | London | 1997 |
| Cosway Property Limited | London | 2006 |
| Cosworth Properties Limited | Derry | 2005 |
| Cosy Corner Lets Ltd | Slough | 2025 |
| Cosy Cruise Cribs Ltd | Stoke-On-Trent | 2023 |
| COSY52 Ltd | Cambridge | 2019 |
| COT Lane (the Woodlands) Residents Limited | Stourbridge | 1975 |
| Cot's Green Management Company Limited | Kidlington | 1996 |
| Cotchett Village Management Company Limited | Chesterfield | 2020 |
| Cote Farm (Thackley) Management Company Limited | York | 2019 |
| Cote Management Ltd | Henley-On-Thames | 2018 |
| Cote-Mer Management Ltd | Dorset | 2021 |
| Cotefield (Bodicote) Management Company Limited | Salisbury | 2016 |
| Cotelands Freehold 1-99 Limited | Redhill | 1997 |
| Cotes Court Management Ltd | Poole | 2020 |
| Cotetarn Limited | Hertfordshire | 1978 |
| Cotford Green (Taunton) Management Company Limited | New Milton | 2005 |
| Cotford Green Apartments Management Company Limited | Taunton, | 2000 |
| Cotg Management Company Limited | Chigwell | 2005 |
| Cotgrove Grange (Aldridge) Management Company Limited | Swadlincote | 2016 |
| Cotham Management Company Ltd | Bristol | 2003 |
| Cotleigh Flat Management Ltd | London | 2007 |
| Cotleigh Investments Limited | London | 2020 |
| Cotman Close Freehold Limited | New Malden | 1987 |
| Coton House Estate (Rugby) Management Company Limited | Salisbury | 2016 |
| Coton House Farm Management Company Limited | Swadlincote | 2021 |
| Coton Manor (Shrewsbury) RTM Company Limited | London | 2021 |
| Coton Manor Management Company Limited | Craven Arms | 1993 |
| Coton Meadow (Phase 4) Amenity Land Management Company Limited | Rugby | 2004 |
| Coton Meadow (Phase 4) Apartment Management Company Limited | Rugby | 2004 |
| Coton Meadow Amenity Land Management Company Limited | Rugby | 2003 |
| Coton Meadow Apartment Management Company Limited | Rugby | 2003 |
| Coton Meadows Management Limited | London | 2024 |
| Coton Park Residents Association Limited | Rugby | 2014 |
| Cotsford (Management) Limited | Solihull | 2004 |
| Cotshill Management Company Limited | Chipping Norton | 1995 |
| Cotsmoor Management Company Limited | Leighton Buzzard | 1994 |
| Cotswold Business Park Management Limited | Luton | 1991 |
| Cotswold Chase (Eastcombe) Management Company Limited | Gloucester | 2012 |