| Uncontrolled housing | Habitat spontané |
| Under state/local control | Regie (gestion) |
| underpinning | fondation, reprise en sous-œuvre |
| unforeseen | imprévus |
| unfolded | Etalé |
| Unhealthy | Insalubre |
| Unlawful; Unauthorized | Illégal |
| Unravel | Dénouer |
| Unrest | Agitation |
| Upheaval | bouleversement |
| uprroting | deracinement |
| Urban design | Composition urbaine |
| Urban form/morphology | Forme urbaine |
| Urban function | Fonction urbaine |
| Urban hiérarchie | Hiérarchie urbain |
| urban planning | Urbanisme |
| Urban renewal/redevelopment | Rénovation foncière |
| Urbaniation; Urban growth | Urbanisation |
| User | Usager |
| Usher | Guide |
| Utility | Service public urbain |
| | |
| Vantage | perspective, avantage |
| Vantage point | point d'observation |
| | |
| Wanton | gratuit |
| Wage | Salarial |
| Warfare | guerre |
| Wasteland | Friche |
| Wastewater | Eaux usées |
| weave (wove Woven) | tisser |
| wedge | cale caler |
| to wit | à savoir |
| |
| Yardstick | critère |
| yoke | joug |
| | |
| Zone | Zone |
| Zoning | Zonage |
