Hmmm? I don't know. The single cloud is interesting. Maybe I'd be more inclined to score higher if you had focused more on the cloud or even a wider view?
I really like the concept. You may have been going for negative space, but did you look at this with a panoramic (ratio) feel to it? I think it would have worked quite well. The clouds are cool...looks like they are right on top of the house. On my monitor the clouds are a little blown-out. The lines of the vineyard add nice interest and the house is positioned well within the composition. I'm noticing some weird artifacts around the clouds and in the lower sky area. A bit distracting.
Overall a nice photo. I hope you have access to this location on a regular basis as it has much potential for other opportunities (seasons, etc...).