| Cobnut Close Management Company Limited | Tonbridge | 2023 |
| Cobnut Park Management Limited | Maidstone | 2019 |
| Coborn Mews Management Company Limited | Sawbridgeworth | 1986 |
| Cobourg Management Co Ltd | Tenby | 2008 |
| Coburg Field (Chudleigh) Management Company Limited | Southend On Sea | 2014 |
| Coburg House (Windsor) Management Limited | Windsor | 2004 |
| Coburg Quay Management Company Limited | Preston | 1997 |
| Cochrane Close Management Limited | New Milton | 1995 |
| Cochrane Close MT Limited | London | 2026 |
| Cochrane Court (Bookham) Co Ltd | Dorking | 2004 |
| Cociety (Social Housing) Limited | London | 2021 |
| Cock and Dolphin Yard Management Company Limited | Blackpool | 2011 |
| Cock O' the North Management Company Limited | Hoddesdon | 2007 |
| Cockburn Enterprises Ltd | Bristol | 2020 |
| Cockbury Court Management Limited | Gloucester | 2010 |
| Cockerham Management Company Limited | Preston | 2020 |
| Cockhill House Court Limited | Trowbridge | 1986 |
| Cocknage Barns Management Ltd | Stone | 2019 |
| Cockram House (Ilfracombe) Limited | Woolacombe | 2019 |
| Cocksford Residents Association Limited | Tadcaster | 2007 |
| Cockton's Yard Management Company Limited | Cockermouth | 1986 |
| Coco C 78A Ltd | London | 2024 |
| Coco Ramsden Properties Limited | Rochford | 2025 |
| Cocoa Court Management Limited | Newcastle | 1995 |
| Cocoa Touch Ltd | London | 2018 |
| Cocoa Works York Management Limited | London | 2023 |
| Cocoon Property Services Limited | Derby | 2020 |
| Codds Ltd | Milford Haven | 2024 |
| Code Property Management Ltd | Sale | 2021 |
| Codemu Property Deals Ltd | Aylesbury | 2025 |
| Codenham Lodge (Cheltenham) Limited | Cheltenham | 1977 |
| Codes House Management Company Limited | Epsom | 2022 |
| Codfellas Properties Ltd | London | 2021 |
| Codgold Limited | Bedford | 1973 |
| Codon Court Management Limited | Sawston | 2017 |
| Codsall House Limited | Brierley Hill | 2014 |
| Cody Management Ltd | St Albans | 2018 |
| Cody-Magee Property Ltd | Leeds | 2024 |
| Coeburn Property Limited | Hemel Hempstead | 2002 |
| Coed Castell Management Company Limited | Shrewsbury | 2005 |
| Coed Darcy (Llandarcy) Management Company Limited | York | 2013 |
| Coed Issa Management Company Limited | Hoddesdon | 2022 |
| Coed Y Celyn Management Company Limited | Betws Y Coed | 2003 |
| Coed Y Felin Management Company (New Inn) Limited | Bourne End | 2013 |
| Coed Y Glyn Estates Ltd | Wrexham | 2025 |
| Coed-Y-Lan Management Company Limited | Penarth | 2014 |
| Coelkea Management Limited | Malvern | 1990 |
| Coeus Properties Limited | Cardiff | 2025 |
| Cofel Limited | London | 2020 |
| Coffee House Court Management Company Limited | Leicester | 2019 |
| Coffey's Property Ltd | Strathaven | 2026 |
| Cofton Gardens Limited | Birmingham | 1964 |
| Cogan Chambers Management Limited | Hull | 2003 |
| Cogan Court Management Company Limited(The) | Cardiff | 1981 |
| Cogan Property 2 Limited | Highbridge | 2024 |
| Cogan Property Limited | Highbridge | 2023 |
| Cogan Property Portsmouth Limited | Highbridge | 2025 |
| Coganhayes Limited | Honiton | 2026 |
| Coggers Management Company Limited | Dover | 2016 |
| Coggeshall Mills Resident Association Limited | West Malling | 2022 |
| Coggeshall Pieces Management Company Limited | Halstead | 1989 |
| Coggeshall West Residents Management Company Limited | Harlow | 2020 |
| Coglin Cottages Ltd | Windsor | 2014 |
| Cohen Lettings Limited | Northolt | 2026 |
| Cohesion Design Ltd | Trowbridge | 2023 |
| Cohousing Development Company Ltd | Stroud | 2024 |
| Cohousing Exeter Limited | Stroud | 2025 |
| Coinagehall Place Management Company Limited | Redruth | 2007 |
| Coincastle Property Management Limited | Penarth | 1984 |
| Coiners Wharf Management Company Limited | Hebden Bridge | 1990 |
| Coinflint Residents Association Limited | London | 1984 |
| Coiniris Property Management Limited | Bristol | 1984 |
| Coinmaker Limited | Nottingham | 1987 |
| Cokeham Court Tenants Associatio N (Worthing) Limited | Croydon | 1960 |
| Coker View Management Company Limited | Taunton | 1983 |
| Cokers Court Bourne END RTE Company Limited | Uxbridge | 2003 |
| Cokers Court Management Co. Limited | Uxbridge | 1984 |
| Cokers Place Ltd | London | 2020 |
| COL DES Fosses Limited | London | 2019 |
| Colab Realty Ltd | Morpeth | 2025 |
| Colado Properties Limited | London | 2025 |
| Colaird Letting Ltd | Broxburn | 2025 |
| Colbeck Mews Ltd | London | 2016 |
| Colben Court Residents Limited | Bexhill-On-Sea | 2005 |
| Colborne Close (Iver) Management Company Limited | Hertford | 2016 |
| Colborne Court Residents Management Company Limited | London | 2006 |
| Colborne Place (Woking) Management Company Limited | Ringwood | 2017 |
| Colboro Ltd | Hove | 2024 |
| Colbran (Portslade) Management Company Limited | Worthing | 1982 |
| Colbro Properties Limited | Oakham | 2015 |
| Colburn Walk (Catterick) Management Company Limited | Tarporley | 2016 |
| Colchester (Burma) Residents Company Limited | Hertford | 2003 |
| Colchester Court Management Company Limited | Cardiff | 2001 |
| Colchester Property Services Limited | Colchester | 2015 |
| Coldbath Management Limited | London | 2008 |
| Coldean Limited | | 1994 |
| Coldershaw Road Management Company Limited | London | 2005 |
| Coldhams Place (Cambridge) Management Company Limited | Cambridge | 2020 |
| Coldharbour Farm Barns Management Limited | Haywards Heath | 1994 |
| Coldharbour Lane Management (Salisbury) Company Limited | Salisbury | 2007 |