Love it! There's a barn not too far from here that reminds me of this one. I've stopped a few times to shoot the one near us just because I love the vibrant reds in it, just like this one.
Nice subject.
Great separation of colors with the blue sky, red barn and green grass. The building in the background seems anomalous. I'd like to see this shot from other angles. The black barn roof and the white trim/fence define color areas. The shadow on the front corner of the barn dilutes the power of the distinct regions of color. I think this might have worked with a shot from farther to the left and crop out the end of the barn with the shadow; thus yielding blue sky in the upper left, green (althouth not verdant) grass in the bottom left and the red barn at the right side of the picture.