| THE WHITE COMPANY | — | — | — | Open → |
| THE WHITE COMPANY | — | — | — | Open → |
| THE YOKEFLEET ESTSTE COMPANY LTD | — | — | — | Open → |
| The Yorkshire Property Centre Ltd | Goole | — | — | Open → |
| THE YORKSHIRE PROPERTY CENTRE LTD | — | — | — | Open → |
| Thea Susan Collin | Beverley | — | — | Open → |
| THELMA BAYRAM | — | — | — | Open → |
| THELMA BAYRAM | — | — | — | Open → |
| Theresa Fensom | Leeds | theresafensom67@yahoo.co.uk | — | Open → |
| THEREZA DE SARAM | — | — | — | Open → |
| THOM CLARK | — | — | — | Open → |
| THOMAS | — | — | — | Open → |
| Thomas Bilverstone | Goole | t.bstone@hotmail.co.uk | — | Open → |
| Thomas Elvidge & Victoria Hodgson | York | — | — | Open → |
| Thomas Hilling | — | tomhilling@woodhousebarry.co.uk | — | Open → |
| Thomas Mason | Bradford | — | — | Open → |
| THOMLINSON | — | — | — | Open → |
| THOMPSON | — | — | — | Open → |
| THOMPSON | — | — | — | Open → |
| THOMPSON | — | — | — | Open → |
| Thompson Developments | Gilberdyke | — | — | Open → |
| Thompson Developments | Goole | — | — | Open → |
| Thompson Groundcare Ltd | Driffield | — | nick thompson | Open → |
| Thornton & Brook | Selby | — | — | Open → |
| Three Rivers District Council | Hertfordshire | building.control@threerivers.gov.uk | 01923 727125 | Open → |