| Acorn and Rose Ltd | New Malden | 2015 |
| Acorn AR Ltd | Croydon | 2025 |
| Acorn Basements Limited | Chessington | 2022 |
| Acorn Blackcountry Developments Limited | Halesowen | 1999 |
| Acorn Blue 2 Ltd | Betchworth | 2023 |
| Acorn Blue Ltd | Betchworth | 2022 |
| Acorn Braintree Limited | London | 2012 |
| Acorn Brickwork Limited | Bordon | 2006 |
| Acorn Build Company Limited | London | 2015 |
| Acorn Builders (Dorset) Limited | Dorchester | 2002 |
| Acorn Builders (Pewsey) Limited | Pewsey | 1999 |
| Acorn Builders Haslemere Ltd | Maidstone | 2016 |
| Acorn Building & Decorating Ltd | Bexhill-On-Sea | 2002 |
| Acorn Building & Landscapes Ltd | Burton-On-Trent | 2022 |
| Acorn Building & Plumbing Ltd | Callington | 2022 |
| Acorn Building & Roofing Company Limited | Chesterfield | 2002 |
| Acorn Building and Improvements Ltd | Manchester | 2023 |
| Acorn Building and Maintenance Ltd | Harlow | 2026 |
| Acorn Building Consultancy Ltd | Birmingham | 2018 |
| Acorn Building Contractors (Shropshire) Limited | Shrewsbury | 2008 |
| Acorn Building Contractors Ltd | Rochester | 2021 |
| Acorn Building Contracts Limited | Southampton | 2005 |
| Acorn Building Contracts (London) Ltd | Ware | 2018 |
| Acorn Building Maintenance Ltd | Kingskerswell | 2022 |
| Acorn Building Projects Ltd | Warrington | 2009 |
| Acorn Building Service (MK) Ltd | Milton Keynes | 2018 |
| Acorn Building Services (Bucks) Limited | Tring | 2009 |
| Acorn Building Services (Luton) Limited | Luton | 1998 |
| Acorn Building Services (Midlands) Limited | Derby | 2017 |
| Acorn Building Services Ltd | Rochdale | 2007 |
| Acorn Building Services Norfolk Ltd | Norwich | 2008 |
| Acorn Business Centres (Mansfield) Limited | Lincoln | 1989 |
| Acorn C Ltd | Hereford | 2012 |
| Acorn Carpentry and Building Limited | Ashford | 2008 |
| Acorn Carpentry Limited | Cassington | 1997 |
| Acorn Civil Engineering Ltd | Cardiff | 2020 |
| Acorn Civils Ltd | Stockport | 2024 |
| Acorn Cladding Services Limited | Oldham | 2012 |
| Acorn Commercial Interiors Ltd | Leicester | 2010 |
| Acorn Complete Limited | Manchester | 2007 |
| Acorn Conservatories Limited | Dorchester | 1998 |
| Acorn Construction & Concrete Ltd | Swansea | 2020 |
| Acorn Construction & Developments Limited | Birkenhead | 2019 |
| Acorn Construction & Property Development Ltd | Stratford-Upon-Avon | 2025 |
| Acorn Construction (Bexleyheath) Ltd. | London | 2023 |
| Acorn Construction (London) Limited | Chorley | 2005 |
| Acorn Construction (Newbury) Limited | Berkshire | 2003 |
| Acorn Construction (South Wales) Limited | Cardiff | 1983 |
| Acorn Construction (Southern) Limited | Bournemouth | 2011 |
| Acorn Construction (Yorkshire) Ltd. | Leeds | 1996 |
| Acorn Construction Services Limited | Glasgow | 1982 |
| Acorn Consultancy & Investments Limited | Broadstone | 2007 |
| Acorn Contracting Ltd | Leigh-On-Sea | 2024 |
| Acorn Contractors Limited | Horsham | 1984 |
| Acorn Countryside Services Ltd | Hailsham | 2019 |
| Acorn Damp Proofing Ltd | Rotherham | 2017 |
| Acorn Damp Proofing Solutions Limited | Burscough | 2026 |
| Acorn Design & Develop Limited | Richmond | 2016 |
| Acorn Design & Project Management Limited | Eastleigh | 2008 |
| Acorn Design and Instalations Ltd | Newcastle Upon Tyne | 2013 |
| Acorn Designer Driveways Limited | Doncaster | 2021 |
| Acorn Designs Ltd | Tarporley | 2020 |
| Acorn Development Limited | Peterborough | 1996 |
| Acorn Development Projects Limited | Newbury | 2019 |
| Acorn Developments (East Anglia) Limited | Bury St Edmunds | 2013 |
| Acorn Developments (Kendal) Limited | Kendal | 1999 |
| Acorn Developments (NI) Ltd | Belfast | 2004 |
| Acorn Developments (Surrey) Limited | Haslemere | 2026 |
| Acorn Developments (SW) Limited | Taunton | 2003 |
| Acorn Domestic Repairs Limited | Ramsgate | 2007 |
| Acorn Driveways and Patios Ltd | Ornskirk | 2025 |
| Acorn Driveways Wakefield Ltd | Wakefield | 2026 |
| Acorn DVP Ltd | London | 2025 |
| Acorn Electric & Plumbing Ltd | Barking | 2026 |
| Acorn Electrica Ltd | Belvedere | 2023 |
| Acorn Electrical and Home Improvement Ltd | Norwich | 2021 |
| Acorn Electrical Ltd. | Cowdenbeath | 2015 |
| Acorn Electrical Solutions Limited | Swindon | 2002 |
| Acorn Electrics Limited | Worcester | 2013 |
| Acorn Establishments Ltd | London | 2025 |
| Acorn Event Solutions Ltd | Leeds | 2006 |
| Acorn Excavations Limited | Wokingham | 1997 |
| Acorn Exclusive Buildings and Developments Ltd | Alfreton | 2020 |
| Acorn Exclusive Buildings Limited | Alfreton | 2026 |
| Acorn Festive Lights Limited | Selby | 2018 |
| Acorn Fireproofing Ltd | Norwich | 2024 |
| Acorn Floor Sanding Limited | Bournemouth | 2015 |
| Acorn Floors Ltd | Birmingham | 2000 |
| Acorn Garage Doors Group Ltd | Letchworth Garden City | 2021 |
| Acorn Garage Doors Ltd | Rye | 2006 |
| Acorn Garden Design Ltd | Neston | 2023 |
| Acorn GAS Ltd | Tadworth | 2019 |
| Acorn GAS Services Limited | Manchester | 2005 |
| Acorn Green Energy Ltd. | Cowdenbeath | 2018 |
| Acorn Groundwork Limited | Maidstone | 1999 |
| Acorn Heating and Plumbing Ltd | Stoke On Trent | 2019 |
| Acorn Heating Services Limited | Bridlington | 2013 |
| Acorn Homecover Limited | Cardiff | 2025 |
| Acorn Homes (Bridgnorth) Limited | Bridgnorth | 2002 |
| Acorn Homes (Cheshire) Limited | Trafford Park | 2010 |