subtopia

Blend of suburb +‎ utopia

subtopia (countable and uncountable, plural subtopias)

1. Sprawling suburbs, collectively.
   • 1960 November, H. P. White, “The evolution of train services on the Southern's Oxted line”, in Trains Illustrated, page 662:

     In the 1890s and in the early years of the present century there was considerable building development in the area around Sanderstead, Warlingham and Oxted, where large villas were springing up. East Grinstead, Tunbridge Wells and Uckfield were growing fast, as was that loosely knit "subtopia"—neither town, village nor country—which is known collectively as Crowborough.

• subtopian

• “subtopia”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.