| Collinbridge Management Company Limited | Newry | 2006 |
| Collingbourn Limited | Bromley | 1983 |
| Collingdale Lodge Freehold Limited | Croydon | 2004 |
| Collingham Brook Management Company Ltd | Newark | 2017 |
| Collingham C2 Land Management Company Ltd | Newark | 2017 |
| Collingham Place Limited | Harlow | 2011 |
| Collingham Place Management Company Limited | London | 2005 |
| Collingham Services Limited | London | 1957 |
| Collingridge House RTM Company Limited | London | 2008 |
| Collingsgate Residents Management Company Limited | Derbyshire | 2019 |
| Collington (Tudor Court) Limited | Eastbourne | 1968 |
| Collingtree Park 72 Watermill Way Management Limited | London | 2023 |
| Collingtree Park 77 Watermill Way Management Limited | London | 2023 |
| Collingtree Park Residents Management Company Limited | London | 2021 |
| Collingwood and Blake Court Residents Association Limited | Broadstairs | 1991 |
| Collingwood Communal Area Limited | Southampton | 2011 |
| Collingwood Court (NW42HE) RTM Company Limited | London | 2008 |
| Collingwood Court (TA6) RTM Company Limited | Bridgwater | 2024 |
| Collingwood Court Freehold Ltd | Stanmore | 2013 |
| Collingwood Farm (Camberley) Management Company Limited | Poole | 1997 |
| Collingwood Grange Management Company Limited | Derby | 2020 |
| Collingwood House Limited | Worthing | 1964 |
| Collingwood Management Company (Torquay) Ltd | Torquay | 2025 |
| Collingwood Mansions Residents Management Company Limited | Tyne & Wear | 2005 |
| Collingwood Mount Management Company Limited | Camberley | 1985 |
| Collingwood Place Residents Association Limited | Farnborough | 1982 |
| Collingwood Properties (Eastbourne) Limited | Newhaven | 1998 |
| Collingwood Residents Management Company Limited | Taunton | 2011 |
| Collins Brook Court Management Company Limited | Ulverston | 2010 |
| Collins Court Chideock Management Limited | Bridport | 1993 |
| Collins Services Ltd | Havant | 2023 |
| Collinsfield Management Company Limited | Evesham | 2011 |
| Collipriest H0USE Management C0MPANY Limited | Taunton | 1980 |
| Collisco Property Maintenance Limited | Crawley | 2024 |
| Collison Place Limited | Welwyn Garden City | 2025 |
| Collison Place RTM Company Ltd | Croydon | 2015 |
| Collyhurst Estate Management Company Limited | Manchester | 2025 |
| Collyhurst Estate Management Limited | Manchester | 2025 |
| Collyhurst Neighbourhood Management Company Limited | Manchester | 2025 |
| Collynson House RTM Company Limited | London | 2025 |
| Colman Court Freehold Limited | Ringwood | 2002 |
| Colman's Wharf Management Limited | Hove | 1988 |
| Colmar Property Ltd | Sunderland | 2025 |
| Colmore Gaskell Property Management Limited | Cheltenham | 2018 |
| Colmworth Business Park Management Company Limited | Peterborough | 2002 |
| Coln Clearances Limited | Cheltenham | 2001 |
| Coln Manor Management Company Limited | Cirencester | 1987 |
| Coln River Lodges Limited | Northwood | 2011 |
| Coln Signature Homes (Bristol) Limited | Bristol | 2023 |
| Colnbrook Court Management Company Limited | Shrewsbury | 1967 |
| Colne Gardens Management Company Limited | Ipswich | 2016 |
| Colne House Management Company Limited | Norwich | 1987 |
| Colne Maisonettes Limited | Cambridge | 1975 |
| Colne Mead a RTM Company Limited | Rickmansworth | 2025 |
| Colne Mead B RTM Company Limited | Rickmansworth | 2025 |
| Colne Mead C RTM Company Limited | Rickmansworth | 2025 |
| Colne Mead RTM Company Limited | Rickmansworth | 2025 |
| Colne Mead RTM D Company Limited | Rickmansworth | 2025 |
| Colne Meadow (Brightlingsea) Management Company Limited | Ipswich | 2019 |
| Colne Place Gardens Management Company Limited | Colchester | 2025 |
| Colne Place Management Company Limited | Earls Colne | 2022 |
| Colne Reach Residents Company Limited | East Bergholt | 2001 |
| Colne View RTM Company Limited | Leigh-On-Sea | 2003 |
| Colnecombe Limited | Cheltenham | 1984 |
| Colneview (Management) Limited | Colchester | 2007 |
| Colney Hatch Court Limited | London | 1996 |
| Colney Hatch Lane Management Limited | London | 2005 |
| Colney Manor Resident Management Company Limited | Milton Keynes | 2023 |
| Colney Reach (Bowthorpe 2) Flats NO.2 Management Company Limited | London | 2004 |
| Colonia Park (Colchester) Management Company Limited | Colchester | 1989 |
| Colonial Buildings Bradford Limited | Newcastle Upon Tyne | 2004 |
| Colonial Park Management Company Limited | Colchester | 2007 |
| Colonial Wharf (Chatham) Residents Management Company Limited | York | 2019 |
| Colonnade Court Management Limited | Harrogate | 2004 |
| Colonnade Court Residents Limited | Bournemouth | 2004 |
| Colonnade House Management Company Ltd | London | 2006 |
| Colonnade RTM Company Limited | Newcastle Upon Tyne | 2023 |
| Colonsay Management Company Limited | Kingswear | 2005 |
| Colorada Freehold Limited | London | 2012 |
| Colosseum Terrace Management Limited | Southampton | 1996 |
| Colour House Management Limited | Richmond | 2020 |
| Colours (Lucca Apartments) Management Company Limited | Hemel Hempstead | 2010 |
| Colours (Manvers Way) Management Company Limited | Hemel Hempstead | 2007 |
| Colpitts Grange Residents Association Ltd | Hexham | 1992 |
| Colston Bassett Hall Stable Block Development Limited | Nottingham | 1980 |
| Colston C (Gerrards Cross) Management Company Limited | Great Missenden | 2023 |
| Colston Court Management Limited | Bristol | 1975 |
| Colston Gardens Residents Management Company Limited | Leicester | 2025 |
| Colston Street Management | Bristol | 2025 |
| Coltal Limited | High Wycombe | 1999 |
| Coltham House (Cheltenham) Limited | Ross On Wye | 1985 |
| Colthorn Farm Management Company Limited | Oxford | 2019 |
| Coltishall Barnby Residents Company Limited | Norwich | 2007 |
| Coltishall Hall Management Company Limited | Norwich | 2003 |
| Coltishall Rectory Road Management Company Limited | Norwich | 2023 |
| Coltman Management Company Limited | Hull | 1986 |
| Colton Residential Limited | Sutton Coldfield | 2024 |
| Colton Street Management Company Limited | Leicester | 2010 |
| Colts Bay Residents Limited | Winchester | 1994 |
| Coltslow Farm Road Management Co Ltd | Stoke-On-Trent | 2023 |