| 5 | Golden Express Thai Takeaway | Takeaway/sandwich shop | North Hertfordshire | SG4 0JN |
| 5 | Graveley Primary School | School/college/university | North Hertfordshire | SG4 7LJ |
| 5 | Halcyon Days Residential Care Home | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 7LU |
| Exempt | Hedley Wright Wine Merchants | Retailers - other | North Hertfordshire | SG4 0JX |
| 5 | Highbury Infant School | School/college/university | North Hertfordshire | SG4 9AG |
| 5 | Highbury Lodge Day Nursery | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 9RW |
| 3 | Highbury Rise | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 9RW |
| 5 | Highover JMI School | School/college/university | North Hertfordshire | SG4 0JP |
| 5 | Hitchin Girls School | School/college/university | North Hertfordshire | SG4 9RS |
| 5 | Hitchin House Day Nursery | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 0TW |
| 4 | Hitchin Kitchen Cafe | Restaurant/Cafe/Canteen | North Hertfordshire | SG4 9SU |
| 5 | Holroyd Howe At Kingshott School | School/college/university | North Hertfordshire | SG4 7JX |
| 5 | Hoo Bakes | Other catering premises | North Hertfordshire | SG4 |
| Awaiting | Hot Wok Chinese Kitchen Ltd | Takeaway/sandwich shop | North Hertfordshire | SG4 9TP |
| 4 | Indian Hitchin | Takeaway/sandwich shop | North Hertfordshire | SG4 9NR |
| 5 | Iris Court Care Home | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 7QH |
| Awaiting | Irongate Market Garden | Retailers - other | North Hertfordshire | SG4 7DR |
| 4 | J Robarts & Son Ltd | Retailers - other | North Hertfordshire | SG4 8XQ |
| 4 | J'S GRILL | Takeaway/sandwich shop | North Hertfordshire | SG4 0JN |
| 5 | JC Agriculture Limited | Distributors/Transporters | North Hertfordshire | SG4 8PJ |
| 5 | Jess’ Cakery | Other catering premises | North Hertfordshire | SG4 |
| 5 | KSG | Other catering premises | North Hertfordshire | SG4 |
| 5 | Kells Kitchen | Mobile caterer | North Hertfordshire | SG4 |
| 3 | Khushma cottage | Restaurant/Cafe/Canteen | North Hertfordshire | SG4 9ST |
| 4 | Kiddicaru Hitchin | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 0AA |
| 5 | Kimpton Bowls Club | Pub/bar/nightclub | North Hertfordshire | SG4 8RA |
| 4 | Kimpton Primary School | School/college/university | North Hertfordshire | SG4 8RB |
| 2 | Kimpton Spice | Takeaway/sandwich shop | North Hertfordshire | SG4 8HY |
| 5 | Kings Walden Stores | Restaurant/Cafe/Canteen | North Hertfordshire | SG4 8LA |
| Awaiting | Lannock Barn | Restaurant/Cafe/Canteen | North Hertfordshire | SG4 7EE |
| Awaiting | Lannock Butchery | Retailers - other | North Hertfordshire | SG4 7EE |
| Awaiting | Lannock Larder | Retailers - other | North Hertfordshire | SG4 7EE |
| 4 | Lannock Manor | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 7EE |
| 5 | Leavened Ltd | Manufacturers/packers | North Hertfordshire | SG4 7EE |
| 5 | Lifestyle Express | Retailers - other | North Hertfordshire | SG4 0AG |
| Awaiting | Lighthouse Fish & Chips | Takeaway/sandwich shop | North Hertfordshire | SG4 9NR |
| Exempt | Lisa Allen - Herts Honey | Farmers/growers | North Hertfordshire | SG4 |
| 4 | Little Wymondley Baptist Church | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 7JA |
| Awaiting | Lodge Farmhouse B&B | Hotel/bed & breakfast/guest house | North Hertfordshire | SG4 8LL |
| 5 | Lolleywood Cafe | Mobile caterer | North Hertfordshire | SG4 7DP |
| 5 | Major Crusts Ltd | Other catering premises | North Hertfordshire | SG4 |
| 5 | Maria’s Novelty cakes & Bakes | Other catering premises | North Hertfordshire | SG4 |
| 5 | Mary Exton JMI School | School/college/university | North Hertfordshire | SG4 0QA |
| 5 | Maryam sweets | Other catering premises | North Hertfordshire | SG4 |
| 5 | Maydencroft Manor Native Breeds Farm | Retailers - other | North Hertfordshire | SG4 7QA |
| 4 | Meja Mija Self Service Store | Retailers - other | North Hertfordshire | SG4 9DR |
| 5 | Milford Lodge Care Home | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 9AL |
| 5 | Millennium First Steps Nursery Ltd | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 9UW |
| 5 | Minimakers Partnership - Graveley Pre-school | Hospitals/Childcare/Caring Premises | North Hertfordshire | SG4 7LB |
| 5 | My Handmade Treasure | Other catering premises | North Hertfordshire | SG4 |