These are not "McMansions." Their domes are made with 100% organic polymer chains, fabricated by artisanal molecular foundries. And the homes inside are all sustainably manufactured out of locally-mined carbonaceous compounds and minerals. So they're good for the asteroid belt environment, and great for you!
This is a 1980 image by Robert McCall from an OMNI magazine gallery called "Space Witness." You can see more incredible, futuristic images of cities from OMNI over at OMNI Reboot.