Will Elon Musk foray into affordable housing next? Earlier this week, he said on Twitter that The Boring Company would transform dirt from tunnel digging into bricks for low-cost housing. A spokesperson confirmed the plans to Bloomberg, and said, “there will be an insane amount of bricks.”

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A Boring Company spokesperson told Bloomberg bricks would come from “excavated muck.” Musk has indicated in the past he could sell excavated materials; in March he tweeted about kits of life-size LEGO-like interlocking bricks to make structures inspired by ancient Egypt. And when asked if the bricks could be used for affordable housing around that time, he said yes, and that “two people could build the outer walls of a small house in a day or so.”

Related: Elon Musk’s Boring Company to sell life-size ‘LEGO-like’ bricks dug from the earth

It seems like he’s serious, but there are still plenty of questions around such an endeavor — such as how many housing units Musk could build with Boring Company bricks. Bloomberg spoke with University of California, Los Angeles lecturer Juan Matute who said Musk’s tweet “assumes that housing costs are driven by construction materials, and particularly, construction materials that can be replaced by bricks. That’s not the case.” Labor and land drive prices more, according to Bloomberg, at least in California where The Boring Company is currently tunneling.

Another potential issue is that chemicals have contaminated land underneath Los Angeles. If contaminants are present in excavated dirt, it may be difficult for The Boring Company to transform that dirt into bricks.

Matute told Bloomberg challenges might not prevent Musk from following through on the plan, saying, “That doesn’t mean The Boring Company can’t buy some land and build a few low-cost houses, with a partner like Habitat for Humanity. And say, ‘Look what we did.'”

The Boring Company said future offices could be erected with their bricks, according to Bloomberg. The company’s Frequently Asked Questions page said they’re “investigating technologies that will recycle the earth into useful bricks to be used to build structures,” and that these bricks “can potentially be used as a portion of the tunnel lining itself.”

+ Elon Musk Twitter

Via Bloomberg

Image via Web Summit