This pattern of the 'garden suburb' with inter- and post-war private housing developments occurred widely across the borough, with small estates of social housing representing a low percentage of housing in any single council ward; six of the 30 electoral wards with fewer than 2% social housing are in the borough: Hylands, Mawneys, Pettits, Hacton and the two wards forming Upminster, Cranham and Upminster Ward. Plans to extend existing developments in much of the borough are blocked as open land is protected as part of the Metropolitan Green Belt. In contrast, the southern part of Havering adjacent to the Thames is within the London Riverside section of the Thames Gateway redevelopment area. New open spaces and large scale house building to provide an entirely new residential community is planned.