No garage?
I do feel your pain, I'm living in a much smaller home than the one I moved from, and my brewing is feeling the pinch. Don't give up: an empty pipeline suuuuuuuucccccccccks.
Also, all grain or extract? If it's just extract, you should still be able to maintain boiling temps with your usual apparatus (propane?). All grain complicates things, but should still be do-able.
So, my plans for the next batch here, if these freezing temps don't resolve by then:
Sweep the snow off the patio, set up the burner and kettle, do my usual strike water prep and BIAB mash, insulate as I normally do along with adding maybe one more layer. I'll probably adjust my hop schedule to go "no-chill" and just use the snow and cold outside temps to cool: this saves me pumping a bunch of water through the chiller and onto the pato. I could also consider doing ice water in a bucket with my pond pump.
I'll also have a pound or two of DME on standby in case I miss my temps on the low side.
Most prep work (sanitizing the fermenter and stuff like that) will happen indoors. Stuff will move outside only when it's needed, then be brought back inside.
Arguably, it's going to be a bit tougher to make perfect recipes: temps may be hard to keep on target, and the hop scheduling will be a bit funky. But with all that said... any beer is better than no beer!