| 23g Electrical Ltd | Builders | SG2 8AE | 2023 |
| A Class Air-Conditioning Systems Ltd | Plumbing & heating | SG2 7DF | 2020 |
| A Leonard Ltd | Painters & decorators | SG7 6HZ | 2000 |
| A P Solutions 2022 Ltd | Gardeners & landscapers | SG2 8LN | 2022 |
| Able Groundworks & Construction Ltd | Builders | SG2 8AA | 2018 |
| Ace of Trees Ltd | Gardeners & landscapers | SG2 8LJ | 2020 |
| Adams-Electrical-Services Ltd | Electricians | SG2 7DT | 2025 |
| Aesthetics Painting & Decorating Ltd | Painters & decorators | SG2 0AU | 2023 |
| Air Cool Engineering (N.I.) Ltd. | Plumbing & heating | SG2 7EG | 1997 |
| Air Cool Engineering Systems Ltd | Plumbing & heating | SG2 7EG | 2004 |
| Ajs Construct Ltd | Builders | SG7 6NG | 2020 |
| Allrounduk Building & Construction Ltd | Builders | SG7 5FJ | 2011 |
| Allure Cleaning Company Ltd | Cleaners | SG2 8SU | 2023 |
| Als Movers Ltd | Removals | SG2 0BG | 2016 |
| Amc Construction Building Ltd | Builders | SG2 8BP | 2020 |
| Amc Fam Ltd | Builders | SG2 0QF | 2022 |
| Amkj Construction Ltd | Builders | SG2 9DJ | 2026 |
| Amp Management Services Ltd | Electricians | SG2 7LN | 2019 |
| Andrei Plumbing Ltd | Plumbing & heating | SG2 8RG | 2019 |
| Anglia Complete Services Ltd | Cleaners | SG7 6SP | 2006 |
| Antn Projects Ltd | Builders | SG2 9EP | 2022 |
| Ap Pipefitting Ltd | Builders | SG2 9AT | 2017 |
| Apollo Interiors Ltd | Builders | SG7 6QQ | 2010 |
| Apollo Property Developments Ltd | Builders | SG7 6QQ | 2015 |
| Appliance Angels Ltd | Appliance repair | SG2 9UY | 2012 |
| Aqua Go Ltd | Cleaners | SG7 6QB | 2025 |
| Aqua In Ltd | Cleaners | SG7 6QB | 2026 |
| Arg General Construct Ltd | Builders | SG2 0AU | 2024 |
| Ascott Ph Services Ltd | Plumbing & heating | SG2 7JA | 2004 |
| Ashwell Garage Ltd | Garages & mechanics | SG7 5LG | 2008 |
| Atam Gas Ltd | Plumbing & heating | SG2 9BD | 2024 |
| Augustus Electrical Contractors Ltd | Electricians | SG2 7BY | 2002 |
| Avista Plumbing & Heating Ltd | Plumbing & heating | SG2 9FB | 2008 |
| Awb Electrical Services Ltd | Electricians | SG7 5DD | 2020 |
| Axel Interiors Ltd | Builders | SG2 9PR | 2017 |
| B D Electrical Contractors Ltd | Electricians | SG7 6HP | 2008 |
| B&C Commissioning and Validation Ltd | Builders | SG2 8TS | 2025 |
| Baldock Nail Spa Ltd | Hair & beauty | SG7 6BG | 2025 |
| Bare Beauty & Aesthetics Ltd | Hair & beauty | SG2 0QH | 2025 |
| Bdjp Electrical Ltd | Electricians | SG2 9QB | 2017 |
| Belle and Bee Beauty X Baldock Ltd | Hair & beauty | SG7 5AF | 2025 |
| Bkm Building Solutions Ltd | Builders | SG2 8TS | 2025 |
| Bmd Solution Ltd | Builders | SG2 8BP | 2022 |
| Boltop Autos Ltd | Garages & mechanics | SG2 9RA | 2025 |
| Bonano Ltd | Builders | SG2 9EN | 2025 |
| Bromfield Car Repairs Ltd | Garages & mechanics | SG2 8ET | 2025 |
| Brzc Ltd | Plumbing & heating | SG2 8RG | 2020 |
| Btr Plumbing Ltd | Plumbing & heating | SG7 5BG | 2026 |
| Bubble Nugget Ltd | Builders | SG2 7PG | 2022 |
| Buildsway Ltd | Builders | SG2 9JJ | 2019 |
| By Ells Ltd | Hair & beauty | SG2 7DR | 2024 |
| C G Plumbing & Heating Ltd | Plumbing & heating | SG2 7QG | 1997 |
| C&C Stone Ltd | Flooring & tiling | SG2 8JA | 2012 |
| C&V Total Build Ltd | Builders | SG2 8TA | 2019 |
| C2 Buildworks Ltd | Builders | SG2 7BH | 2025 |
| Calidwell Homes Ltd | Builders | SG2 8ET | 2023 |
| Carovans Ltd | Electricians | SG7 5LN | 2023 |
| Carpathica Ltd | Builders | SG2 8TG | 2017 |
| Cl Carpentry & Building Ltd | Joiners & carpenters | SG2 8TS | 2022 |
| Clarion Enterprises Ltd | Painters & decorators | SG2 9PB | 2021 |
| Clay Building Services Ltd | Electricians | SG2 7LQ | 2024 |
| Clearline Drainage Solutions Ltd | Cleaners | SG2 0AR | 2026 |
| Cmb Management Ltd | Builders | SG2 7BG | 2020 |
| Cms Herts Ltd | Electricians | SG2 7AL | 2011 |
| Complete Contractors Ltd | Builders | SG2 7PG | 2014 |
| Computerglaze Holdings Ltd | Glaziers | SG2 9DD | 1991 |
| Connected Heating Solutions Ltd | Plumbing & heating | SG2 8EP | 2021 |
| County Renovations Ltd | Builders | SG2 7EU | 2022 |
| Crystal Clean Herfordshire Ltd | Cleaners | SG2 9PH | 2025 |
| Csr Building Ltd | Builders | SG2 9YA | 2010 |
| Csr Cleaning Services Ltd | Cleaners | SG2 8BN | 2025 |
| D & C Kitchen Installations Ltd | Joiners & carpenters | SG2 0JL | 2016 |
| D & R Construction and Son Ltd | Groundworks & demolition | SG7 6SF | 2011 |
| D Herdman Brickwork Ltd | Builders | SG2 8RB | 2018 |
| D.L.R Logistics Ltd | Removals | SG2 9LS | 2022 |
| Daniel Lewis Construction Ltd | Builders | SG2 9SP | 2017 |
| Dapper Dog Grooming Ltd | Hair & beauty | SG7 6AQ | 2025 |
| Dc Electrical and Maintenance Ltd | Electricians | SG2 0LT | 2026 |
| Deans Solutions Ltd | Electricians | SG2 8LP | 2026 |
| Debnam Services Ltd | Hair & beauty | SG7 6QQ | 2017 |
| Dec Carpentry&Interiors Ltd | Builders | SG2 8SE | 2016 |
| Dgs Roofing Ltd | Roofers | SG2 0LW | 2021 |
| Dhv & Son Ltd | Builders | SG2 0PL | 2013 |
| Dial'N'Shine Ltd | Builders | SG2 8DY | 2025 |
| Dk Technic Ltd | Garages & mechanics | SG2 8TP | 2021 |
| Dmt Flow Ltd | Builders | SG2 9RX | 2023 |
| Dot Electrical Smart Homes Ltd | Electricians | SG2 9TL | 2020 |
| Dp Herts Constrution Ltd | Builders | SG2 9AR | 2025 |
| Dpc Contracts (London) Ltd | Plumbing & heating | SG7 6QQ | 2011 |
| Dpc Electrical Contracts Ltd | Electricians | SG7 6QQ | 2017 |
| Drive Logic Ltd | Plumbing & heating | SG2 9JE | 2016 |
| Drm Build & Maintain Ltd | Builders | SG2 9JS | 2025 |
| Duro Property Management Ltd | Cleaners | SG2 9XL | 2025 |
| Dz Building Ltd | Plumbing & heating | SG2 0LH | 2019 |
| E A Windows & Doors Ltd | Builders | SG2 9UD | 2023 |
| Ecos Construction Ltd | Builders | SG2 0NY | 2015 |
| Eden Special Works Ltd | Builders | SG7 6AQ | 2018 |
| Efficiency Plumbing Solutions Ltd | Plumbing & heating | SG2 9SL | 2019 |
| Elecon Electrical Ltd | Electricians | SG2 0NS | 2026 |
| Electric Max Ltd | Electricians | SG2 0QD | 2025 |
| Electrifyen Ltd | Builders | SG2 9DU | 2026 |
| Electrosparky Ltd | Electricians | SG2 0LY | 2024 |
| Elliotts Commercial Strip Out Ltd | Cleaners | SG2 0LQ | 2024 |
| Elliotts Facilities Management Ltd | Electricians | SG2 0LQ | 2017 |
| Elliotts Groundworks Ltd | Flooring & tiling | SG2 0LQ | 2023 |
| Elliotts Specialist Cleaning Ltd | Cleaners | SG2 0LQ | 2025 |
| Emp Energy Ltd | Electricians | SG2 0EJ | 2026 |
| Emtrans Logistics Ltd | Removals | SG2 8UW | 2024 |
| Eph Install Services Ltd | Electricians | SG2 9SP | 2014 |
| Etsm Gas Ltd | Plumbing & heating | SG2 8RB | 2025 |
| Ez.Pz Works Ltd | Builders | SG7 6QQ | 2026 |
| Falcons Build Ltd | Builders | SG2 0HA | 2018 |
| Fast Steel Erecting Ltd | Builders | SG2 0QS | 2021 |
| Five Elements Constructions Ltd | Builders | SG2 7ST | 2015 |
| Ftf Building Services Ltd | Builders | SG2 9YD | 2014 |
| G D Building and Maintenance Services Ltd | Builders | SG7 6RT | 2016 |
| G Douglas Electrical Ltd | Electricians | SG2 7DX | 2021 |
| G Jones Electrical Services Ltd | Electricians | SG2 8HD | 2022 |
| G.T. Cannon Electrical Ltd | Electricians | SG7 5AQ | 2003 |
| Gate Leak Detection Ltd | Plumbing & heating | SG2 7QT | 2022 |
| Gce Herts Cleaning Ltd | Cleaners | SG2 9JZ | 2024 |
| Gdm Building Solutions Ltd | Builders | SG2 8QD | 2016 |
| Gentle Property & Construction Ltd | Builders | SG7 5DX | 2024 |
| Geoghegan Bros. Ltd | Builders | SG7 6QQ | 1973 |
| George Hse Training & Consultancy Ltd | Builders | SG2 9QT | 2025 |
| Ggf Autos Ltd | Garages & mechanics | SG2 7LH | 2018 |
| Gilbert Shipley Ltd | Hair & beauty | SG7 6BG | 2026 |
| Gj Auto Repairs Ltd | Garages & mechanics | SG2 9NH | 2019 |
| Glam Headquarters Ltd | Hair & beauty | SG2 8SG | 2024 |
| Gmj Solutions Ltd | Builders | SG7 6NE | 2026 |
| Go Mechanical Ltd | Plumbing & heating | SG2 7QT | 2023 |
| Goble Labouring Services Ltd | Builders | SG2 8RL | 2013 |
| Gracefull Cleaning Ltd | Cleaners | SG2 7FY | 2022 |
| Gracefull Cleaning Solutions Ltd | Cleaners | SG2 7FY | 2026 |
| Gracefull Maintenance Ltd | Builders | SG2 7FY | 2024 |
| Grade A Beauty Ltd | Hair & beauty | SG7 6NS | 2021 |
| Green Decor & Contracting Ltd | Builders | SG2 9LY | 2016 |
| Greg Building Maintenance Ltd | Builders | SG2 9QP | 2022 |
| Greg Building Solutions Ltd | Builders | SG2 9QP | 2023 |
| Gs Electrics Ltd | Electricians | SG2 7EZ | 2024 |
| H M B Builders Ltd | Builders | SG2 0BZ | 2019 |
| Halliwell Roofing & Building Services Ltd | Roofers | SG2 7DS | 2018 |
| Handyguy Property Maintenance Ltd | Plasterers | SG2 0AE | 2023 |
| Hanrahan Ltd | Electricians | SG7 6EX | 2002 |
| Harveys Roofing Ltd | Roofers | SG7 5ES | 2025 |
| Heartview Windows Ltd | Builders | SG2 7DL | 2024 |
| Heartwood Welding Company Ltd | Builders | SG2 9BX | 2013 |
| Heatsafe Plumbing and Heating Ltd | Plumbing & heating | SG2 7DS | 2014 |
| Heritage Maintenance Services Ltd | Plumbing & heating | SG2 0EJ | 2026 |
| Hertfordshire Complete Construction Services Ltd | Builders | SG2 8TY | 2020 |