The image you want to obtain doesn't display shadows produced by bright sunlight, like on a cloudy day.
To produce a similar effect, you could add an Invisible inward light half sphere light source available in the LightShapes.sh3f furniture library released with version 7.0.
Cover your house design with this light source, reduce its power to 10% to 20% and render your design at a night hour with YafaRay renderer.
See attached file for a test.