Painting of any kind indicates that the dreamer is about to embark on a project very important to him or her. Discerning the circumstances of that project, and the details, are dependent on other symbols in the dream.
Dreaming of a house being painted indicates that information previously kept from you will soon come to light.
If you dream of being an artist and painting a picture that is beautiful and happy, then you have the power to create whatever circumstances you want the most in life.
A dark, foreboding painting, however, indicates a pessimistic outlook on life, and therapy might be of great assistance.
If you watch while someone else paints a picture, you may have the feeling of being on the outside looking in and need to take control of your life – again, depending on the atmosphere, circumstances, and other symbols in the dream.