| 2 | Giardino 14 Coffee | Takeaway/sandwich shop | Watford | WD17 1EU |
| 3 | Gill's Superstore | Retailers - other | Watford | WD18 7NB |
| 5 | Ginas Loaf | Retailers - other | Watford | WD24 |
| 5 | Glenn Sports & Social Club | Pub/bar/nightclub | Watford | WD24 5AZ |
| 3 | Glomens African Store Limited | Retailers - other | Watford | WD17 2QN |
| 5 | Glowinone | Restaurant/Cafe/Canteen | Watford | WD17 1NA |
| 3 | Golden Crown | Takeaway/sandwich shop | Watford | WD24 5BH |
| 5 | Good Time Pizza | Restaurant/Cafe/Canteen | Watford | WD17 1AY |
| Exempt | Goodwood Parade Post Office | Retailers - other | Watford | WD24 5LL |
| 5 | Gopuff | Retailers - other | Watford | WD24 4YY |
| Awaiting | Gourmet Pizza And Desserts | Restaurant/Cafe/Canteen | Watford | WD24 5RR |
| 5 | Grandmas Kitchen Caribbean Cuisine | Retailers - other | Watford | WD17 |
| 4 | Greek Time | Restaurant/Cafe/Canteen | Watford | WD24 5BJ |
| 5 | Greekos Gyros | Other catering premises | Watford | WD17 1AY |
| 5 | Greenbanks Care Home | Hospitals/Childcare/Caring Premises | Watford | WD17 4JR |
| 5 | Greenco Food & Wine | Retailers - other | Watford | WD18 7SY |
| 5 | Greggs | Other catering premises | Watford | WD17 2BJ |
| 5 | Greggs | Other catering premises | Watford | WD17 1LQ |
| 5 | Greggs @ Sainsburys Dome | Other catering premises | Watford | WD25 9JS |
| 5 | Greggs PLC | Retailers - other | Watford | WD18 8SA |
| 5 | Greggs PLC | Retailers - other | Watford | WD17 2BD |
| Awaiting | Gregorys Kitchen | Retailers - other | Watford | WD19 |
| 5 | Grill Porteno | Restaurant/Cafe/Canteen | Watford | WD17 1AY |
| 5 | Grilled Cottage | Other catering premises | Watford | WD18 0EJ |
| 5 | HCL @ Bushey And Oxhey Infants School | School/college/university | Watford | WD23 2QH |
| 5 | HCL @ Cassiobury Infant And Nursery School | School/college/university | Watford | WD17 3PE |
| 5 | HCL @ Central Primary School | School/college/university | Watford | WD17 2LX |
| 5 | HCL @ Chater Infant School | School/college/university | Watford | WD18 7RD |
| 3 | HCL @ Chater Junior School | School/college/university | Watford | WD18 0WN |
| 5 | HCL @ Field Junior School | School/college/university | Watford | WD18 0AZ |
| 5 | HCL @ Kingsway Infants School | School/college/university | Watford | WD25 0ES |
| 5 | HCL @ Kingsway Junior School | School/college/university | Watford | WD25 0JH |
| 5 | HCL @ Lanchester Community Free School | School/college/university | Watford | WD17 3HD |
| 5 | HCL @ Parkgate Infant And Nursery School | School/college/university | Watford | WD24 7RL |
| 5 | HCL @ St. Anthonys Catholic Primary School | School/college/university | Watford | WD18 6BW |
| 5 | HCL @ Watford Field Infant And Nursery School | School/college/university | Watford | WD18 0WF |
| 5 | HMS Fishmongers Ltd | Retailers - other | Watford | WD18 |
| 5 | Hafiz Halal Meat & Groceries | Retailers - other | Watford | WD25 7FF |
| 3 | Haines Fish & Grill | Takeaway/sandwich shop | Watford | WD25 7QX |
| 5 | Haji Baba Ltd | Retailers - other | Watford | WD24 7RT |
| 5 | Halsey Masonic Hall Watford Ltd | Pub/bar/nightclub | Watford | WD18 0JE |
| 5 | Hanako | Restaurant/Cafe/Canteen | Watford | WD17 1BD |
| 5 | Happy Flavours Caribbean Takeaway | Takeaway/sandwich shop | Watford | WD18 0EJ |
| Awaiting | Happy Tokyo | Takeaway/sandwich shop | Watford | WD18 8AA |
| 5 | Harvester Garston | Restaurant/Cafe/Canteen | Watford | WD25 0LL |
| 4 | Harwoods Convenience Store | Retailers - other | Watford | WD18 7RB |
| 5 | Haute Dolci Watford | Restaurant/Cafe/Canteen | Watford | WD17 2TQ |
| 3 | Hayris Kebab House | Takeaway/sandwich shop | Watford | WD17 1JY |
| 5 | Hazel Peters | Mobile caterer | Watford | WD25 |
| 5 | Heather And Rose Health Ltd | Retailers - other | Watford | WD17 1BD |