Our first cottage is inspired by an entry in a 1885 catalog of Victorian house layouts. ... I admit, I adore the Victorian era. You'll be seeing a lot of these. More
importantly, though, the Victorian era is much closer layout wise to fantasy-medieval settings, particularly when you consider that the presence of magic probably boosts the standard of living closer to the industrial era.
Besides, we're here because we're a tad bored by everyone living in one-room cabins, right?
These images measure 20' x 40' (4 x 8 squares) on transparent .pngs at 100px / 5' game space. (Sorry, guys, I make these for web and roll20, not print.) From top to bottom, we have a bedroom, the kitchen, and a parlor, with the 'hall' on the right.
Total area (not including halls; the SBG doesn't care of about halls or stairs):
429sqft
That's within tolerance of the "1 stronghold space" guides listed by the SBG. You're looking at the slightly upscale version of a one-room cabin. ... Let's see how this adds up, math-wise.
Bedroom: 117sqft - SBG "Basic Bedrooms" @ 700gp
Kitchen: 143sqft - SBG "Basic Kitchen" @ 2000gp
OR "Basic Alchemical Lab" @ 700gp
Parlor: 260sqft - SBG "Basic Commons" @ 500gp
Notice the big, fat 'OR' on the kitchen.
I addressed this issue in my pricing guide. Basically, because the SBG is geared to... well, strongholds, it's a little wonky when we want to scale the basic industrial kitchen to cooking part-time for a family of two. The alchemy lab contains measuring equipment, a fireplace, a water basin, and shelves for ingredients. The kitchen contains all that, as well as a cast-iron stove and a pantry. Pick what's appropriate.
The final tally:
Basic Bedrooms @700gp/400sqft = 205gp/117sqft > (rounded up) >
300gp
Basic Alchemy Lab @700gp/400sqft = 250gp/143sqft > (rounded up) >
300gp
Basic Commons @ 500gp/400sqft = 325gp/260sqft > (rounded up) >
400gp
Walls: wood, first floor =
free
Doors: 2x free, 5x simple wood bought =
50gp
Windows: 7x glass =
70gp
Locks: 3x average =
120gp
Total: 1240gp for this house, fully furnished
DMG "Simple House" price? 1000gp. We're golden.
(Okay, this isn't totally accurate-- you don't get cushioned sofas in the basic commons. You get rough benches and ugly art. You want the sofas, you need to upgrade. :P Also, if you're putting a stove in that kitchen? That total price just flew up to 1740gp. You're welcome.)