I got sidetracked a bit into another project:
Recently I needed to build a small wooden shack using Sintra PVC foam board, to be featured in an article I'm writing for Garden Railways. At the time I didn't know where it would fit into the layout. Eventually I decided to put it in the town of Grandt Cliff. Until now the only other structure I'd created for that site was a miner's cabin. This will be an old shack which has been converted into a sandwich shop, called Serenity's Sandwich Shack.
The town site is at the base of Grandt Cliff, and was undeveloped. To prepare the site, I had to chisel out some of the rocks and mortar near the base of the cliff. I built up a foundation for the shack, starting with a section of miniature stone wall made of real rock and mortar. I also used some small slabs leftover from a previous project:

Strips of foam core art board were hot-glued in place to make a form, for extending the foundation:

Mortar was poured into the form, then shaped and leveled. The cavity in the foundation is to hold wiring for the building lights. A brass tube acts as a conduit. Another tube provides drainage:

Eventually there will be two or three other buildings at this site, including a RR depot. So after pouring the foundation, I also began pouring part of the slab for the platform of the future depot:

I added a small slab to one side of the shack's foundation. This will be part of steps leading to the shack:

Here's a shot of the unfinished shack, temporarily in place on the foundation:

A similar shot, with the more work done on the porch. The porch and shack are built as two separate pieces to facilitate painting. They won't be glued together until after both structures have been painted:

And here's a shot of the entire town site, located below the Cliffside Mine:

Enjoy!