One of my purchases at Broadside was the 28mm 4Ground Wooden Closet (although given it hasn't any plumbing in evidence I suspect it's not that sophisticated!). I put it together last night so I thought I'd post a couple of pictures:
As with their General Purpose Wagon it comes on a single sheet of MDF but, in this case, it is pre-finished. You can assemble it complete or remove some sections to make it look in need of some repair.
It was very easy to assemble and here's the finished article
And here it is occupied by a Brigade Games figure: