A while back I was asked to paint a home, to be given as a remembrance gift to the owners who were downsizing to another residence. The client sent me many good photos of the neat-as-a-pin cottage-style home, so I started with two pencil sketches from slightly different angles.
They picked the second sketch, which I then scanned and roughed in the color with acrylic paint and prisma pencils.
I had originally cropped the picture on these sketches to keep the image suited for an 11″ x 14″ frame, which I usually do to make it easy to frame. The client was not concerned about getting a custom frame made so she asked I zoom in a bit more to focus on the house and gardens.
I painted the finished piece in acrylic washes on illustration board, shown below.
AchillesPortfolio 
Love how you use the acrylics as washes.
Glenn, thanks so much!
Oh Pat . . . she must be so pleased with your beautiful capture of her once-upon-a-time home. Wow.
Cathy, thanks for your kind words, you always make my day!