| Norman Zaifert Ltd | Goole | — | — | Open → |
| Norman Zaifert Ltd | Goole | — | — | Open → |
| NORMAN ZEIFEITt | — | — | — | Open → |
| Norman Zeifert | — | — | — | Open → |
| Norman Zeigfreit | Goole | — | 01405 861818 | Open → |
| NORRIS | — | — | — | Open → |
| NORTH | — | — | — | Open → |
| North Devon District Council | Devon | — | 01395 517481 | Open → |
| North Dorset District Council | Dorset | buildingcontrolnddc@dorset.gov.uk | 01258 454111 | Open → |
| North East Derbyshire District Council | Chesterfield | building.control@bcnconsultancy.co.uk | 01246 345817 / 01246 345905 | Open → |
| North East Lincolnshire Council | Grimsby | bc@nelincs.gov.uk | — | Open → |
| North Hertfordshire District Council | Letchworth, Herts. | building.control@north-herts.gov.uk | 01462 474355 | Open → |
| North Kesteven District Council | Sleaford | building_control@n-kesteven.gov.uk | — | Open → |
| North Kesteven District Council | Sleaford | building_control@n-kesteven.gov.uk | — | Open → |
| North Lincolnshire Council | Scunthorpe | buildingcontrol@northlincs.gov.uk | 01724 297420 | Open → |
| North Norfolk District Council | Cromer | — | — | Open → |
| North Somerset District Council | Weston-Super-Mare | — | 01275 888680 | Open → |
| North Somerset District Council | Somerset | — | 01275 888680 | Open → |
| NORTH TO SOUTH CONSTRUCTION | Leeds | SHANE.STOTT@HOTMAIL.CO.UK | — | Open → |
| North Tyneside Council | North Tyneside | — | 0191 643 6012 | Open → |
| North Tyneside Council | Cobalt Business Park | — | x | Open → |
| North Wales Fire & Rescue Service | St Asaph | — | — | Open → |
| North Wales Fire Service | Wrexham | — | 01978 367870 | Open → |
| North Wales Fire Service | Llandudno, Conwy | — | 01492 877654 | Open → |
| North Wales Fire Service | Caernarfon, Gwynedd | — | 01286 673811 | Open → |