In this class, I demo my whole process for creating this house portrait. I start by using my lightbox to trace and refine my sketch:

 

Then, I grab my pen and go over all my pencil lines:

 

 

Finally, I use watercolor to bring the picture to life:

 

 

I have process videos for each step of the way, so go back to the class lessons if you'd like to check them out.

I used this photo as my main reference image, for color and layout: