A recent op-ed discussing how to respond to the extinction of species suggested building McMansions is not the way to go:

The solution is simple: moderation. While we should feel no remorse about altering our environment, there is no need to clear-cut forests for McMansions on 15-acre plots of crabgrass-blanketed land. We should save whatever species and habitats can be easily rescued (once-endangered creatures such as bald eagles and peregrine falcons now flourish), refrain from polluting waterways, limit consumption of fossil fuels and rely more on low-impact renewable-energy sources.

This is an interesting perspective of McMansions: they all include clearing broad swaths of land for giant houses and large lawns. If they all had 15 acres, these would be some pretty expensive McMansions. Indeed, I’m guessing these would be far out of the reach of the typical McMansion buyer (or builder) and this is territory for the true mansions.

At the same time, it hints at one of the key critiques of McMansions: they are an unnecessary use of resources. Because of their large size, they often require sizable plots of land to add the yard that is often required for American single-family home life. This does not even include how the resources to build the McMansion were procured. McMansion critics would often rather to build denser housing on smaller lots with more sustainable materials rather than carve out a large domain for one home in a large house.

Presumably, there is some middle ground between 15 acre McMansions and more acceptable McMansions. What if they did have much smaller lots? (This then often leads to complaints that they are too big for their lot.) What if they could be made with sustainable materials? What if they could be net-zero energy homes? What if they were built in denser areas where driving was not as necessary? (This can lead to concerns that they do not fit the character of denser neighborhoods.) There are some possibilities here that might render the McMansion more environmentally friendly.