5k- slab, $1500-elec.,240v w/125' run to meter. $6k- lumber, siding, shingle, GD,opener,french door between shop and screened in porch, Italian tile in SIP, window for window unit air, attic access stairs, all trim is in cedar, paint, screen door, vinyl siding, moisture barrier, insulation, everything was bought at !0c on the dollar or less. I use to work for a big box and got everything that was cull, discontinued, clearance, returned. example, if someone returned a half dozen cedar fence pickets because of a knot or split, they would put them in a pile out back until they got a bunch and then sell them as a pallet, I would buy them and rip them to 4" for trim, or just cut the bad part off the end. If you know how to cut you can't tell the diff. I bought a bunch of 2x6 that was bowed and cut it to stud length. Saved me a ton of money. Year started was 2016. I did all the work myself, except for slab and pulling permit for elec. Its still a work in progress, but I would say 90% complete. 12-14k, if I had puchased everything retail it would be around 40k. Size 16x20 and a 8x20 screened in porch for mama. total- 24x20. footprint on house is $99 ft.