In this day and age, where material stuff is so cheap, isn’t 20K for a tiny shed crazy? Clearly it is because it involves so much work, and work is so expensive, but I can’t help but think there should be a technical solution to this. Or buildings are just not automatable? I’m amazed.
It's probably mostly labor cost. An 8x10 shed kit starts at under $US2k but if you pay someone to assemble it, including electrical, the price will go up very quickly.
I know someone who builds horse shelters that are larger than that, but a fraction of the cost, delivered. I've actually been thinking that if I wanted an outside office, I'd ask him to custom build one with the fourth wall closed (horse shelters are 3-sided) and I'd insulate and sheetrock it myself. IIRC he did our 10x30 one for about $2k, including delivery.
Around here, the cutoff for needing a permit for a "permanent structure" is 10'x12' which is a pretty good sized outside office.
You could do it for less than half that cost if you do your own labour. I actually came into the article thinking that’s what they did but was disappointed.
This is pretty fancy to call it a shed. Walk outside any Lowe’s or Home Depot and you will see several pre-built options that can be had for $500-$4000 with them getting increasingly elaborate.
Electrical + AC is a firm line where that goes from shed to detached office.