| 1ST Call Heritage Limited | Cowfold | 1996 |
| 1ST Call Home Improvements Ltd | Chobham | 2018 |
| 1ST Call Home Maintenance Ltd | London | 2021 |
| 1ST Call Maintenance (Manchester) Ltd | Manchester | 2008 |
| 1ST Call Mechanical Electrical Limited | Barnsley | 2014 |
| 1ST Call Plumbing & Heating Ltd | Kingswinford | 2025 |
| 1ST Call Plumbing & Heating Solutions Ltd | Cheshunt | 2010 |
| 1ST Call Plumbing and Heating London Ltd | Dartford | 2021 |
| 1ST Call Properties Limited | Stonehouse | 2012 |
| 1ST Call Property Development Ltd | Waterlooville | 2021 |
| 1ST Call Property Services Ltd | Cardiff | 2019 |
| 1ST Call Property Services NE Ltd | Newcastle Upon Tyne | 2021 |
| 1ST Call Renewable Services Ltd | Sheffield | 2026 |
| 1ST Call Renewables Ltd | Bradford | 2024 |
| 1ST Call Road Markings Ltd | Bradford | 2022 |
| 1ST Call Roofing Services Limited | London | 2023 |
| 1ST Call Services (Essex) Ltd | Leigh On Sea | 2026 |
| 1ST Call Shutter & Door Maintenance Limited | Hyde | 2002 |
| 1ST Call Solar Ltd | Birmingham | 2026 |
| 1ST Call T Plumbing Limited | Loughton | 2003 |
| 1ST Call TD Maintenance Ltd | Crawley | 2019 |
| 1ST Call Technologies Ltd | Rotherham | 2006 |
| 1ST Call the Woodworks Ltd | Barnstaple | 2014 |
| 1ST Call Window and Door Repair Service Limited | Shipley | 2025 |
| 1ST Carpentry Portsmouth Ltd | Berwick-Upon-Tweed | 2025 |
| 1ST Choice 4 Decorating Limited | Wellington | 2002 |
| 1ST Choice Ace Garage Doors Ltd | Stretford | 2025 |
| 1ST Choice Aerial & Satellites Ltd | Tewkesbury | 2014 |
| 1ST Choice Asbestos Roof Replacements Limited | Dawlish | 2018 |
| 1ST Choice Bathrooms, Plumbing & Heating Ltd | Bognor Regis | 2014 |
| 1ST Choice Boilers Ltd | Glasgow | 2022 |
| 1ST Choice Brickwork Limited | Marlborough | 2015 |
| 1ST Choice Brothers Ltd | Southgate | 2014 |
| 1ST Choice Build Limited | Ilford | 2018 |
| 1ST Choice Builders Ltd | Sleaford | 2016 |
| 1ST Choice Building & Installations Ltd | Wolverhampton | 2019 |
| 1ST Choice Building Ltd | High Wycombe | 2025 |
| 1ST Choice Building Services Ltd | Hereford | 2016 |
| 1ST Choice Carpentry & Building Ltd | Sutton Coldfield | 2022 |
| 1ST Choice Concrete Limited | Cannock | 2010 |
| 1ST Choice Construction Solutions Ltd | Stourbridge | 2019 |
| 1ST Choice Contractors Limited | Iver | 1994 |
| 1ST Choice Decorator Limited | Croydon | 2014 |
| 1ST Choice Driveway & Surfacing Ltd | Pudsey | 2023 |
| 1ST Choice Driveways Limited | Poole | 2012 |
| 1ST Choice DRY Risers Ltd | Bolton | 2025 |
| 1ST Choice Electrical Services Ltd | West Wickham | 2015 |
| 1ST Choice Facilities Ltd | Rawreth | 2019 |
| 1ST Choice Fitted Bedrooms Limited | Chorley | 2002 |
| 1ST Choice Flooring C&J Ltd | Cwmbran | 2020 |
| 1ST Choice Flooring Solutions Ltd | Wolverhampton | 2014 |
| 1ST Choice GAS Care Ltd | Crewkerne | 2018 |
| 1ST Choice Grab Hire Limited | Manchester | 2016 |
| 1ST Choice Ground Works Ltd | Loanhead | 2014 |
| 1ST Choice Home Improvements Scotland Ltd | Cumnock | 2022 |
| 1ST Choice Insulations Ltd | Dereham | 2005 |
| 1ST Choice Joinery Ltd | Glasgow | 2019 |
| 1ST Choice MW Electrical Limited | London | 2020 |
| 1ST Choice Painting Ltd | Windsor | 2019 |
| 1ST Choice Plumbing and Heating (London) Limited | Borough | 2009 |
| 1ST Choice Plumbing,Heating &Cooling Ltd | Leicester | 2019 |
| 1ST Choice Property Development Ltd | Waltham Abbey | 2019 |
| 1ST Choice Property Maintenance Limited | Birmingham | 2014 |
| 1ST Choice Property Services (UK) Ltd | Manchester | 2008 |
| 1ST Choice Property Solutions BA Ltd | Salisbury | 2023 |
| 1ST Choice Render & Skim Ltd | Nuneaton | 2026 |
| 1ST Choice Renovations Limited | London | 2012 |
| 1ST Choice Roofers Ltd | Luton | 2020 |
| 1ST Choice Roofing & Building Ltd | Redditch | 2020 |
| 1ST Choice Roofing Contractors Ltd | Newport | 2019 |
| 1ST Choice Roofing Limited | Bristol | 2011 |
| 1ST Choice Roofing Specialists Ltd | Redhill | 2025 |
| 1ST Choice Scaffolding Limited | Liverpool | 2003 |
| 1ST Choice Scaffolding Oxford Ltd | Oxford | 2005 |
| 1ST Choice Seamless Gutters Ltd | Barnsley | 2022 |
| 1ST Choice Security Solutions Ltd | Norwich | 2022 |
| 1ST Choice Shopfront Ltd | Birmingham | 2024 |
| 1ST Choice Tiling and Bathrooms Limited | Newton Abbot | 2026 |
| 1ST Choice Tiling Ltd | Glasgow | 2022 |
| 1ST Choice Trades Limited | Bradford | 2006 |
| 1ST Choice Traffic Management Limited | Newbury | 2011 |
| 1ST Choice Windows (UK) Limited | Benfleet | 2008 |
| 1ST Choice Windows Waltham Limited | Melton Mowbray | 2017 |
| 1ST Choice Windows Yorkshire Ltd | Bradford | 2017 |
| 1ST Choice Yorkshire Limited | Halifax | 1998 |
| 1ST Choicescaffoldingwales Limited | Milford Haven | 2023 |
| 1ST Civil Engineering Ltd | | 2007 |
| 1ST Clas Ceiling and Partition Specialists Limited | Sheffield | 2013 |
| 1ST Class Brickwork and Maintenance Limited | Gillingham | 2015 |
| 1ST Class Build Limited | London | 2008 |
| 1ST Class Building Contractors Ltd | Bridgend | 2018 |
| 1ST Class Cladding & Building Limited | Leigh-On-Sea | 2021 |
| 1ST Class Data and Electrical Services Limited | Hertfordshire | 2001 |
| 1ST Class Electrical (Poole) Ltd | Broadstone | 2017 |
| 1ST Class Electrical Services Ltd | London | 2014 |
| 1ST Class Fibreglass Limited | Chessington | 2011 |
| 1ST Class Floors Limited | Hampshire | 2003 |
| 1ST Class Gardening Limited | Bedford | 2015 |
| 1ST Class Group Limited | Beckenham | 2007 |
| 1ST Class Heating and Air Conditioning Limited | London | 2024 |