| 15 Prospect Hill (Whitby) Limited | Whitby | 2019 |
| 15 Queens Gate Gardens RTM Company Limited | Hampton | 2007 |
| 15 Queensthorpe Road RTM Company Limited | Harlow | 2011 |
| 15 Rampart Street RTM Company Limited | London | 2025 |
| 15 Ranelagh Villas (Hove) Limited | Hove | 1999 |
| 15 Redcliffe Street Freehold Limited | London | 2006 |
| 15 Richborne Terrace (Freehold) Limited | London | 2014 |
| 15 Richmond Road Limited | | 1996 |
| 15 Richmond Terrace (Brighton) Freehold Company Limited | Hove | 2019 |
| 15 Ridge Road Limited | London | 1994 |
| 15 Rivercourt Road (Management) Limited | | 1984 |
| 15 Rivers Street (Bath) Limited | Croydon | 1981 |
| 15 Rockley Road Management Limited | London | 1994 |
| 15 Rondu Road Limited | London | 2017 |
| 15 Roslyn Road Bristol Management Limited | Bristol | 1987 |
| 15 Rostrevor Road Limited | London | 1994 |
| 15 Royal Crescent Limited | Northwood Hills | 1996 |
| 15 Russell Square Brighton Limited | Romney Marsh | 1992 |
| 15 Saltram Crescent Limited | London | 2003 |
| 15 Savernake Road Limited | London | 2008 |
| 15 Scarborough Road Limited | Whetstone | 2021 |
| 15 Second Avenue Hove RTM Company Limited | Hove | 2011 |
| 15 Selborne Road Hove Limited | Hove | 2007 |
| 15 Sheet Street RTM Company Limited | London | 2026 |
| 15 Shelldale Road Limited | Brighton | 2003 |
| 15 Sherborne Gardens RTM Company Limited | London | 2014 |
| 15 SHP Leaseholders Ltd | Surbiton | 2004 |
| 15 SHP Management Ltd | Surbiton | 2019 |
| 15 Sillwood Road Management Company Limited | | 1990 |
| 15 Sisters Avenue Limited | London | 2007 |
| 15 South Parade Management Company Limited | Manchester | 1999 |
| 15 Southgate Street Winchester Management Company Limited | Winchester | 2001 |
| 15 Southleigh Road Limited | Bristol | 1985 |
| 15 Spencer Road RTM Co Ltd | Bournemouth | 2015 |
| 15 ST Augustines Road Limited | London | 2025 |
| 15 ST Marks Rise Management Services Ltd | London | 2023 |
| 15 ST Mary's Terrace Limited | London | 2011 |
| 15 ST Michaels Place Residents Limited | Hove | 1990 |
| 15 ST. Augustines Avenue Management Limited | Surrey | 1994 |
| 15 ST. Georges Square Limited | London | 1986 |
| 15 ST. John's Road Clevedon Management Company Limited | Weston-Super-Mare | 1994 |
| 15 Stanley Gardens Service Company Limited | London | 1983 |
| 15 Stanwick Road Freehold Limited | London | 2020 |
| 15 Streathbourne Road Limited | London | 1999 |
| 15 Stretten Avenue Management Company Limited | Cambridge | 2021 |
| 15 Strode Road Management Company Limited | Clevedon | 2001 |
| 15 Sunninghill Road Limited | London | 1999 |
| 15 Sutherland Avenue Freehold Limited | London | 2020 |
| 15 Sutton Court Road Management Company Limited | London | 1980 |
| 15 Sydenham Hill Management Company Limited | Bristol | 1994 |
| 15 Tarring Road Limited | Worthing | 2023 |
| 15 Tell Grove Limited | London | 2016 |
| 15 Temple Road Management Company Limited | Croydon | 2013 |
| 15 Tewit Well Road Management Company Limited | Harrogate | 1996 |
| 15 the Avenue Oaklands Management Co Ltd. | Edenbridge | 1990 |
| 15 the Crescent (Scarborough) Limited | Scarborough | 2001 |
| 15 the Crescent Management Limited | Coleraine | 2000 |
| 15 the High Street Management Ltd | Southend-On-Sea | 2017 |
| 15 the Paragon Clifton Management Co. Ltd | Bristol | 1997 |
| 15 the Park (Freehold) Management Company Limited | Uxbridge | 2007 |
| 15 the Vineyards Bath (Management) Limited | Bath | 1986 |
| 15 Theobalds Road Management Limited | London | 2002 |
| 15 Third Avenue (Hove) Limited | Hove | 2025 |
| 15 Thornsett Road London Management Company Limited | London | 2018 |
| 15 Thornton Avenue Management Limited | Woking | 2009 |
| 15 Thornton Hill Limited | London | 2005 |
| 15 Thorpe Hall ROAD,E.17 Residents Association Limited | Halstead | 1967 |
| 15 Thurlow Road Limited | London | 2001 |
| 15 to 22 Marston Croft Residents Management Company Limited | Southam | 2021 |
| 15 to 23A Graces Road Freehold Company Limited | London | 2018 |
| 15 Treloggan Management Limited | Bodmin | 2016 |
| 15 Trenovissick Road (Management Company) Limited | Par | 2015 |
| 15 Treport Street Limited | London | 1987 |
| 15 Tressillian Road Limited | London | 2000 |
| 15 Tudor Hill (Sutton Coldfield) Management Company Limited | Bromsgrove | 2000 |
| 15 Upper Belgrave Road Management Limited | Bristol | 1975 |
| 15 Upper Park Road Management Company Limited | | 2003 |
| 15 Uxbridge Road Limited | Kingston Upon Thames | 2012 |
| 15 Valkyrie Road RTM Company Limited | London | 2008 |
| 15 Ventnor Villas (Hove) Freeholders Limited | East Sussex | 1998 |
| 15 Victoria Limited | Southampton | 2001 |
| 15 Victoria Parade Broadstairs Limited | Birchington | 1989 |
| 15 Victoria Square Bristol (Management) Limited | Bristol | 1986 |
| 15 Vittoria Walk Management Company Limited | Cheltenham | 1993 |
| 15 Wallace Road Management Limited | London | 2025 |
| 15 Warwick Avenue Management Limited | Hove | 2025 |
| 15 Warwick Road Limited | London | 2017 |
| 15 Waterloo Street Management Limited | Brighton | 2006 |
| 15 Waverley Grove Management Co Ltd | Southsea | 2005 |
| 15 West Park Clifton Bristol Limited | Bristol | 1982 |
| 15 Westbourne Gardens Limited | London | 1999 |
| 15 Westbourne Grove Management Company Limited | Scarborough | 2019 |
| 15 Westbourne Terrace Road Limited | London | 2006 |
| 15 Westbury Road (Management) Limited | Bristol | 1982 |
| 15 Westgate Terrace Limited | Lymington | 2007 |
| 15 Weston Park Management Company Limited | Hornsey | 2011 |
| 15 Wetherby Gardens Limited | London | 1998 |
| 15 Whatley Road Management Company Limited | Bristol | 1994 |
| 15 White Hart Lane (Management) Company Limited | London | 1999 |
| 15 Whitefriars Crescent RTM Company Limited | London | 2006 |