This is how it goes...
Either I take photographs of your house, or you can send me your favorite. I work from the picture to create a detailed sketch.
Then I make a high-resolution scan to my computer. Now I'm able to polish it up, removing imperfections and improving contrast and depth.
At this point the sketch can be re-sized to any size you want. You will receive a high-quality signed and dated print, plus a digital copy so that you may share it online and rave about it to all of your family and friends *nudge, nudge*