| 4 Counties Plumbing & Heating Services Ltd | Plumbing & heating | SG4 0TW | 2012 |
| A&S Concrete Renovation Specialists Ltd | Builders | SG4 9SP | 2018 |
| A2b Building Services Ltd | Builders | SG4 8XW | 2026 |
| Academy Now Ltd | Hair & beauty | SG4 0TY | 2023 |
| Adelaide Construction Ltd | Builders | SG4 9SP | 2016 |
| Aerien Ltd | Removals | SG4 9SP | 2021 |
| Airblu Ltd | Plumbing & heating | SG4 0TY | 2010 |
| Airconic Air Conditioning Ltd | Plumbing & heating | SG4 0TW | 2025 |
| Alexandre Developments Ltd | Builders | SG4 9SP | 1998 |
| Alison Weston Ltd | Hair & beauty | SG4 9SP | 2011 |
| Allied Brickwork Ltd. | Builders | SG4 0RJ | 2011 |
| Ambison Management Ltd | Builders | SG4 0TW | 2015 |
| Amicus Services Ltd | Plumbing & heating | SG4 0TY | 2007 |
| Ams Porsche Ltd | Garages & mechanics | SG4 8QB | 2019 |
| Anthemion Restoration Ltd | Builders | SG4 0TY | 2023 |
| Anthony Scaffolding Services Ltd | Builders | SG4 0TY | 2006 |
| Ar Prop Serv Ltd | Builders | SG4 8LH | 2026 |
| Ashe Roofing Ltd | Roofers | SG4 0JE | 2016 |
| Ashfield Electrical Ltd | Electricians | SG4 9SP | 2026 |
| Aspire Electrical Contractors Ltd | Electricians | SG4 7BD | 2017 |
| Aurum Haven Maintenance Services Ltd | Builders | SG4 8BW | 2026 |
| Barracuda Shop Fitting Ltd | Builders | SG4 0TY | 2006 |
| Base Property Management Ltd | Builders | SG4 0AP | 2026 |
| Bespoke Auto Interiors Ltd | Garages & mechanics | SG4 0TY | 2009 |
| Bill Mcgrath Ltd | Garages & mechanics | SG4 8QB | 2004 |
| Blossom Facials Ltd | Hair & beauty | SG4 0TW | 2022 |
| Blue Planet Plumbing and Heating Ltd | Plumbing & heating | SG4 8AL | 2020 |
| Blue Rose Landscapes Ltd | Gardeners & landscapers | SG4 0TY | 2020 |
| Bm Motorsports Ltd | Garages & mechanics | SG4 0NX | 2016 |
| Bms Leak Detection Ltd | Plumbing & heating | SG4 8YW | 2018 |
| Boc Mechanical and Electrical Services Ltd | Electricians | SG4 9SP | 2025 |
| Boys 2 Men Ltd | Hair & beauty | SG4 7DP | 2002 |
| Broadview Installations Ltd | Glaziers | SG4 0TW | 2026 |
| Broadview Windows Ltd | Glaziers | SG4 0TW | 2001 |
| Brook View Plumbing and Property Services Ltd | Builders | SG4 9SP | 2020 |
| Brown & Green Research Ltd | Builders | SG4 8QB | 2013 |
| Bts1 Ltd | Builders | SG4 8LP | 2025 |
| Buchanan Coachcraft Ltd | Garages & mechanics | SG4 0JX | 2014 |
| Build Complete Ltd | Joiners & carpenters | SG4 9SP | 2025 |
| Building and Technology Systems Ltd | Builders | SG4 8LP | 2006 |
| C Hobbs Plumbing and Heating Ltd | Plumbing & heating | SG4 9SP | 2017 |
| C.M. Battle Ltd | Builders | SG4 7TX | 2003 |
| Cain Markings Ltd | Cleaners | SG4 8RE | 2020 |
| Can Solve Consultancy Ltd | Builders | SG4 9SP | 2006 |
| Capital Contractors South East Ltd | Builders | SG4 0TY | 2023 |
| Cascade Water Consultancy Ltd | Builders | SG4 7BL | 2025 |
| Cascade Water Services Ltd | Builders | SG4 7BL | 2023 |
| Ccs Contractors Ltd | Builders | SG4 0TY | 2009 |
| Chris Goldenberg Construction Management Services Ltd | Builders | SG4 0TW | 2019 |
| Chris Jones Property Services Ltd | Appliance repair | SG4 0TY | 2021 |
| Chris Marks Carpentry & Building Ltd | Joiners & carpenters | SG4 0TW | 2025 |
| Cj Sansom Ltd | Gardeners & landscapers | SG4 8AW | 1989 |
| Ck Bespoke Refurbishments Ltd | Joiners & carpenters | SG4 9RW | 2007 |
| Climech Ltd | Plumbing & heating | SG4 9SP | 2019 |
| Clipper Maintenance Services Ltd | Gardeners & landscapers | SG4 9SP | 1988 |
| Colin Hill Building Solutions Ltd | Builders | SG4 0TP | 2012 |
| Commercial Fire Protection Ltd | Builders | SG4 0TY | 2021 |
| Commercial Fire Protection UK Ltd | Builders | SG4 0TY | 2021 |
| Controversy Ltd | Hair & beauty | SG4 9SP | 2015 |
| Court Harvest Homes Ltd | Builders | SG4 7TR | 1984 |
| Court Homes Developments Ltd | Builders | SG4 7TR | 2018 |
| Court Homes In Partnership Ltd | Builders | SG4 7TR | 2018 |
| Crash Care Centre (Hitchin) Ltd | Garages & mechanics | SG4 0SE | 2017 |
| Creative Carpentry & Kitchens Ltd | Builders | SG4 0TP | 2015 |
| Crescent Cleaning Services Ltd | Cleaners | SG4 0TY | 2020 |
| Cripps Commercial Cleaning Ltd | Groundworks & demolition | SG4 9SP | 2023 |
| Ctk Support Services Ltd | Cleaners | SG4 9SP | 2026 |
| Cwb Carpentry & Construction Ltd | Joiners & carpenters | SG4 0TY | 2024 |
| Cwf Refurbishments Ltd | Builders | SG4 8YW | 2014 |
| D Turner Builders Ltd | Builders | SG4 0TP | 2002 |
| Dan Collier Av Services Ltd | Electricians | SG4 0TW | 2020 |
| Danny Diamonds Ltd | Garages & mechanics | SG4 0AP | 2020 |
| Dante Electrical Ltd | Electricians | SG4 8QJ | 2005 |
| Datum Motorsport Ltd | Garages & mechanics | SG4 7DP | 2011 |
| David Barnes Consulting Ltd | Gardeners & landscapers | SG4 8NR | 2010 |
| Dekoh Ltd | Painters & decorators | SG4 0QH | 2020 |
| Djb Carpentry & Building Ltd | Builders | SG4 9SP | 2025 |
| Dk.5 Ltd | Builders | SG4 9SP | 2003 |
| Dlm Auto Services Ltd | Garages & mechanics | SG4 7HY | 2025 |
| Dobson Brown Ltd | Builders | SG4 7HY | 2013 |
| Dobson-Brown Services Ltd | Builders | SG4 7HY | 2020 |
| Dps Heating & Plumbing Ltd | Plumbing & heating | SG4 0TP | 2017 |
| E-Lux Electrical Ltd | Electricians | SG4 0TW | 2022 |
| Easy Set Props Ltd | Builders | SG4 8TS | 2026 |
| Ecomfort Heating Ltd | Plumbing & heating | SG4 9SP | 2019 |
| Electrical Tradesmen Ltd | Electricians | SG4 9QJ | 2010 |
| Eley Engineering Services Ltd | Garages & mechanics | SG4 9SP | 2015 |
| Elhan Heating Ltd | Plumbing & heating | SG4 0TW | 2016 |
| Elliotts Contract Cleaning Ltd | Cleaners | SG4 7HY | 2023 |
| Ellis Philip Construction Ltd | Builders | SG4 9SP | 2018 |
| Ely Electrical Ltd | Electricians | SG4 9SP | 2021 |
| Eroofing Ltd | Roofers | SG4 0RY | 2019 |
| Fibre Optics Ltd | Electricians | SG4 0JG | 2023 |
| Finishline (UK) Ltd | Garages & mechanics | SG4 7EQ | 2002 |
| Footy'S Foundations Ltd | Builders | SG4 0TY | 2014 |
| Fprs Plumbing and Drains Ltd | Plumbing & heating | SG4 8YW | 2013 |
| Friends Green Porsche Ltd | Garages & mechanics | SG4 7BU | 2021 |
| Frogmore Construction Ltd | Builders | SG4 8NJ | 2022 |
| G.W. Morris (UK) Ltd | Builders | SG4 8YZ | 1997 |
| Galaxy Tiling Contractors Ltd | Flooring & tiling | SG4 7BL | 2009 |
| Galliers Services Ltd | Plasterers | SG4 8PA | 2022 |
| Game & Son Ltd | Builders | SG4 0TY | 2003 |
| Garden City Paving Ltd | Builders | SG4 0TY | 2018 |
| Gibson'S Auto Services Ltd | Garages & mechanics | SG4 8SD | 2020 |
| Glenullin Ltd | Builders | SG4 0TW | 2020 |
| Granary Developments Ltd | Builders | SG4 0TY | 2013 |
| Green Man Developments Ltd | Builders | SG4 0TY | 2020 |
| Greenacres Building Services Ltd | Builders | SG4 7DP | 2024 |
| Greenroom Gardening Ltd | Gardeners & landscapers | SG4 0PA | 2006 |
| Gse Smart Repair Ltd | Garages & mechanics | SG4 0TW | 2015 |
| Guardian Consultancy Services Ltd | Plumbing & heating | SG4 7PT | 2003 |
| H&E Homes Ltd | Builders | SG4 0TW | 2019 |
| H&Q Consultants Ltd | Plumbing & heating | SG4 9LY | 2023 |
| H.J. Haywood and Son Ltd | Painters & decorators | SG4 0TY | 1974 |
| Hale Group Construction Ltd | Builders | SG4 9SP | 2023 |
| Happy Starseed Ltd | Hair & beauty | SG4 9TS | 2026 |
| Hardy-Tunstall Engineering Ltd | Builders | SG4 0TY | 2023 |
| Hawk Pest & Wildlife Management Ltd | Pest control | SG4 7PS | 2021 |
| Hawkes Electrical Herts Ltd | Electricians | SG4 7BB | 2018 |
| Hawley Paint Fx Ltd | Painters & decorators | SG4 8XL | 2012 |
| Hda Auto Services Ltd | Garages & mechanics | SG4 8HY | 2015 |
| Heritage Building Company Ltd | Builders | SG4 0TY | 2021 |
| Heritage Renovating Services Ltd | Builders | SG4 7PT | 2023 |
| Hertfordshire Building Services Ltd | Builders | SG4 9SP | 2024 |
| Hg Construction Ltd | Builders | SG4 0TJ | 1982 |
| Hg M & E Ltd | Builders | SG4 0TJ | 2017 |
| Hg Roofing Ltd | Roofers | SG4 0TJ | 2025 |
| Hislop & Co Horticulture Ltd | Gardeners & landscapers | SG4 9SP | 2011 |
| Hitchin Mot Centre Ltd | Garages & mechanics | SG4 0QB | 2025 |
| Home Interior Design Ltd | Builders | SG4 0TY | 2009 |
| Homecore Services Ltd | Plumbing & heating | SG4 0TW | 2023 |
| Ian Summerbee Ltd | Electricians | SG4 8AR | 2003 |
| Ideal Maintenance Solutions Ltd | Cleaners | SG4 0TY | 2014 |
| Inground Utilities Ltd | Builders | SG4 7PP | 2011 |
| Island Decking Ltd | Gardeners & landscapers | SG4 8YW | 2021 |
| J D Heating & Plumbing Services Ltd | Plumbing & heating | SG4 9SP | 2015 |
| J Hare & Sons Ltd | Builders | SG4 0TY | 2013 |
| J R Roofing Ltd | Roofers | SG4 0TY | 2004 |
| J&D Mac Brothers Ltd | Hair & beauty | SG4 0TY | 2023 |
| Jaylec Electrical Contractors Ltd | Electricians | SG4 0TY | 1997 |
| Jb Carpentry Ltd | Joiners & carpenters | SG4 0TY | 2005 |
| Jdl Construction Ltd | Builders | SG4 0TW | 2010 |
| Jetforcesolutions Ltd | Cleaners | SG4 7BA | 2025 |
| Jetta Services Ltd | Cleaners | SG4 7DP | 2025 |
| Johnarc Ltd | Electricians | SG4 0AG | 2014 |
| Judge & Sons Building Services Ltd | Builders | SG4 9AN | 2024 |
| Just Spray Ltd | Painters & decorators | SG4 0TY | 2018 |
| K G Croft General Building Contractors Ltd | Builders | SG4 0TP | 2005 |
| Kanani Ltd | Hair & beauty | SG4 8BL | 2016 |
| Kdz Solutions Ltd | Garages & mechanics | SG4 0JG | 2023 |