Today's housing crisis is, in part, a failure of imagination: a loss of the vocabulary through which community-led, informal, and incremental housing was once possible. This paper takes the conference theme seriously enough to contest it. Building planning up implies strengthening existing foundations — but what if those foundations are themselves part of the problem? What if the intellectual architecture of contemporary planning was constructed, in part, through the systematic exclusion of alternative ways of thinking about housing, community, and land?

The plotlands of England and Wales offer one of the clearest instances of this process. From the late nineteenth century, working-class families excluded from the formal housing market housed themselves — building dwellings from salvaged materials and collective ingenuity on cheap plots of marginal land. These communities embodied a relationship to place that was durational and relational rather than delivered: condition-making rather than placemaking, in the sense that communities created the circumstances for their own dwelling rather than receiving housing as a managed product. The 1947 Town and Country Planning Act rendered them illegitimate. What survives does so as anomaly — institutionally uncategorisable, absent from policy frameworks — yet holding knowledge that has never stopped mattering.

This paper argues that the plotlands are a diagnostic site where planning's imaginative foreclosure is most visible and recoverable. The contemporary marginalisation of community-led housing — co-housing, community land trusts, incremental self-build — is not a series of independent policy failures. It is the continuing expression of a path dependency running directly from their un-naming. If that genealogy is correct, it carries a radical but logically coherent policy implication: that community-led, self-organised, and trust-based approaches to housing should be the legal first stage of any development process — the threshold that volume housebuilding must demonstrate it cannot meet before its path-dependent procedures are permitted to follow. Recovery requires not building planning up on its current foundations, but inverting the assumption that delivered housing is the default and community-made housing the marginal exception.

The paper draws on a new interdisciplinary research programme currently testing these arguments across surviving plotlands sites through co-present, multi-perspectival encounter — designed to reach the knowledge these communities hold on something closer to its own terms.