I originally drew the house map by itself. Then I wanted to add a basement/dungeon room. So I drew that separately. Then I had the idea to connect them. I did so very clumsily. The transition did not work the way I wanted.
I throw the map into my finishing program and bevel the edges to give it a little depth and framing. Then stylize the lettering and numbers. Basically I type the word or number twice, one in white then in black, bevel the back letter to give it an outline making it easier to read.