Looking at the floor plan I'm curious if some of the storage area is up for grabs. If it's currently unfinished space then it's an opportunity to build in a lot of noise isolation (separated inner wall and a lot of insulation) with shelves on the outside to maximize the remaining storage area.
Yep, I suggested that as well, but I assume it'd be at least 10K, since the "storage room" still has its garage door from when it used to be part of the garage. So that whole wall would need to be re-built, and the room would need to get ducting, vents. Extra 5 or 10K for that conditioning?
Soo, it might happen one day, but I'm not ready to go all in on that yet.
You can run an in-wall unit for a space like that. They're very efficient now, and the nicer models are both way cheaper than routing central air, and very quiet.
The bigger thing is, if it's a garage, it's likely not insulated, which means you'd have to do so for noise/efficiency. Probably still way better than having a desk in your toddler's room though.
Ah, yes I would imagine cost to do the work in the Bay area would be pretty significant unless you can do much of it yourself. Being nonstructural it's not high risk to DIY but with small kids around that's a big project.
