| Hovenden Homes | Howden | — | — | Open → |
| Howard Building & Joinery | Selby | — | — | Open → |
| Howard Duckworth | — | — | — | Open → |
| HOWARD DUCKWORTH | — | — | — | Open → |
| HOWARD JOINERY | — | — | — | Open → |
| HOWARD KING | — | — | — | Open → |
| HOWLING | — | — | — | Open → |
| HOWSES | — | — | — | Open → |
| HUGGINS | — | — | — | Open → |
| Hugh Bartlett | Leeds | — | — | Open → |
| Hugh Rice | Leeds | — | — | Open → |
| HUGHES | — | — | — | Open → |
| Hull Angelina Ltd | Sancton | — | — | Open → |
| Hull City Council | Kingston upon Hull | hull.building.control@hullcc.gov.uk | 01482 300 300 | Open → |
| HULL ISEBERG ARLFC | — | — | — | Open → |
| HULLAH | — | — | — | Open → |
| HUMBER ELCETRICAL ENGINEERING LTD | — | — | — | Open → |
| Humberside Fire and Rescue Service | Hull | publicsafetycentre@humbersidefire.gov.uk | 01482 565333 | Open → |
| HUNTER | — | — | — | Open → |
| Huntingdonshire District Council | Huntingdon | buildingcontrol@huntingdonshire.gov.uk | 01480 388456 | Open → |
| HUNTLEY | — | — | — | Open → |
| HURRELL | — | — | — | Open → |
| HUSSAINE | — | — | — | Open → |
| Hyde Fire Station & Tameside Borough Command | — | — | — | Open → |
| Hyder Consulting Ltd | Treharris | — | 01443 331000 | Open → |