As part of an argument against demolishing buildings, McMansions should also be preserved to help address ecological challenges:

Anyone interested in mediating the worst ongoing outcomes of the present climate catastrophe must also disconnect the idea of development from our notion that it proceeds only in cycles of demolition and new construction—a pattern that prevails because it is maximally legible to our existing structures of debt, financialization, and speculation. About 80 percent or more of a typical new house’s lifetime ecological and energetic impact comes through the operations of initial material extraction, manufacturing, transportation, and construction; and then of eventual demolition, further transportation, and decay. Sustainable buildings are therefore not new buildings—however fuel-efficient their machines and materials. Sustainable buildings are buildings that have been sustained. Merely by being seventy-five years old and in working order, Geller I was radically sustainable. For that matter, any dumb 1990s McMansion down the block is almost as ecologically precious as Geller I. That McMansion’s judicious conservation, too, is part of ecological stewardship.

This kind of conservation comes not by preserving any one house exactly as it is, but by shifting from a fantasy of perpetual newness or untouchable oldness to the best practices that Gropius and Breuer cherished in old New England farmhouses: renovation, addition, retrofitting, and all manner of adaptive reuse that allows ever more lively and dignified density. The model of development becomes less one of the sudden appearance and disappearance of structures, and more one of continuous emendation and repair. Not incidentally, this affords ever more innovative ways of living intergenerationally and integratively—rather than dwelling in the built residue of past generations’ conventions about how families and communities ought to live.

Demolition and rebuilding takes a lot of resources. Additionally, rehabbing existing homes can help keep the character of a neighborhood or community consistent.

The twist above is that this might be the preferred course for McMansions. Such homes are not usually renowned for their architectural quality. Critics are not fans of the ways in which they were constructed, their drain on resources, and their ongoing presence.

I have argued before that at least a few McMansions will be preserved, at the least to mark a particular era and design. Preserving them to help combat climate change moving forward might be a unique feature of this decade.